anglicky - Institute of Hydrobiology

ACADEMY OF SCIENCES OF THE CZECH REPUBLIC 

BIOLOGY CENTRE, v.v.i., INSTITUTE OF HYDROBIOLOGY 

ČESKÉ BUDĚJOVICE 

51 th ANNUAL REPORT 

For the Year 2010 

ISSN 1210 – 9649

© Biology Centre AS CR, v.v.i, Institute of Hydrobiology 

České Budějovice, 2011

CONTENTS 

THE INSTITUTE, SCIENTIFIC COUNCIL 5 

INSTITUTE STAFF AND FIELD OF WORK 

1 INTRODUCTION 

6 

9 

1.1 Director’s preface 9 

1.2 Projects 10 

1.3 Consultancies 11 

1.4 Report on finances 12 

1.5 Students’ theses finished in 2010 14 

2 JAROSLAV HRBÁČEK (1921–2010) 

3 RESERVOIRS 

3.1 Regular monitoring of the reservoirs Slapy and Římov: dissolved 

and dispersed substances in 2010 

3.2 Regular monitoring of the reservoirs Slapy and Římov: microbial 

characteristics, chlorophyll and zooplankton biomass in 2010 

15 

17 

17 

18 

3.3 Regular monitoring: fish stock composition in the Římov Reservoir in 2010 19 

3.4 The effect of river water circulation on the distribution and functioning of 

reservoir microbial communities as determined by a relative distance 

approach 

20 

3.5 Horizontal acoustic surveys and fish behaviour in the open water 23 

3.6 Pelagic occurrence of non-native tubenose goby Proterorhinus semilunaris 

(Heckel) in a central European reservoir 

3.7 Deep spawning of perch Perca fluviatilis in the newly created opencast mine 

lake 

3.8 The stabilizing effect of resting egg banks of the Daphnia longispina species 

complex for longitudinal taxon heterogeneity in long and narrow reservoirs 

3.9 Spatial heterogeneity and seasonal succession of phytoplankton along the 

longitudinal gradient in the Římov Reservoir 

3.10 Bacterial single-cell activities along the nutrient availability gradient in a 

canyon-shaped reservoir: a seasonal study 

24 

25 

25 

26 

27 

3

4 LAKES 29 

4.1 Microbial loop components in the oxic/anoxic boundary in stratified lakes 29 

5 SPECIAL INVESTIGATIONS 31 

5.1 Effect of low temperature on offspring size and filtering screens morphology 

in Daphnia 

5.2 Sinusoidal swimming: a searching checkmate of fishes to the transparent 

zooplankton 

5.3 Anthropogenic nitrogen emissions during the Holocene and their possible 

effects on remote ecosystems 

31 

33 

34 

5.4 Canopy leaching of nutrients and metals in a mountain spruce forest 35 

5.5 Importance of dissolved organic carbon for phytoplankton nutrition in a 

eutrophic reservoir 

36 

6 PUBLICATIONS 38 

APPENDIX: Jaroslav Hrbáček (1921–2010): Complete bibliography 45 

4

Academy of Sciences of the Czech Republic 

BIOLOGY CENTRE, v.v.i., 

INSTITUTE OF HYDROBIOLOGY 

Na Sádkách 7 telephone: (++420) 385310262 

CZ-370 05 České Budějovice fax: (++420) 385310248 

Czech Republic 

e-mail: hbu@hbu.cas.cz 

http://www.hbu.cas.cz 

DIRECTOR: Doc. RNDr. Josef Matěna, CSc. 

SCIENTIFIC COUNCIL: 

Chairperson: 

Members: 

External Members: 

RNDr. Martin Čech, Ph.D. 

RNDr. Karel Horňák, Ph.D. 

RNDr. Jiří Kaňa, Ph.D. 

Prof. Ing. Jiří Kopáček, Ph.D. 

Doc. RNDr. Jan Kubečka, CSc. 

RNDr. Jiří Nedoma, CSc. 

Prof. RNDr. Šimek Karel, CSc. 

Doc. RNDr. Jaroslav Vrba, CSc. 

RNDr. Petr Znachor, Ph.D. 

RNDr. Martin Černý, Ph.D. 

Faculty of Science, Charles University, Prague 

Doc. RNDr. Jan Helešic, CSc. 

Faculty of Science, Masaryk University, Brno 

Prof. Ing. Otomar Linhart, DrSc. 

Research Institute of Fish Culture and Hydrobiology, 

University of South Bohemia, Vodňany 

Prof. Ing. Pavel Pitter, DrSc. 

Institute of Chemical Technology, Prague 

Doc. RNDr. Martin Rulík, Ph.D, 

Faculty of Science, Palacký University, Olomouc 

5

INSTITUTE STAFF AND FIELD OF WORK 

(visit www.hbu.cas.cz/staff.php for more information, e-mail addresses and contacts) 

SCIENTIFIC STAFF: 

Department of Plankton and Fish Ecology: 

Doc. RNDr. Jan Kubečka, CSc. 

(Head) 

RNDr. Martin Čech, Ph.D. 

RNDr. Vladislav Draštík, Ph.D. 

Ing. Jaroslava Frouzová, Ph.D. 

RNDr. Jiří Macháček, CSc. 

Doc. RNDr. Josef Matěna, CSc. 

RNDr. Tomáš Mrkvička, Ph.D. 

RNDr. Jiří Peterka, Ph.D. 

RNDr. Marie Prchalová, PhD 

RNDr. Jaromír Seďa, CSc. 

Mgr. Mojmír Vašek, PhD. 

Fish population dynamics and scientific sonar techniques 

Fish behaviour in the open water, SCUBA diving research 

in lakes and reservoirs, feeding ecology of fish-eating birds 

and mammals 

Fish behaviour and community structure 

Hydroacoustics and fish behaviour 

Fish-zooplankton interactions, ecology of Daphnia 

Feeding biology of fish, ecology of chironomids 

Statistical analyses 

Fish feeding ecology; uw photo and video techniques 

Fish spatial distribution and gillnet selectivity 

Zooplankton, especially seasonal dynamics of Cladocera 

and fish-zooplankton interactions 

Fish feeding and spatial distribution, recruitment dynamics 

Department of Aquatic Microbial Ecology: 

Prof. RNDr. Karel Šimek, CSc. 

(Head) 

Mgr. Martina Čvrtlíková 

RNDr. Karel Horňák, Ph.D. 

RNDr. Jan Jezbera, Ph.D. 

RNDr. Jitka Jezberová, Ph.D. 

(from September maternity leave) 

RNDr. Jaroslava Komárková, 

CSc. 

Prof. Ing. Miroslav Macek, CSc. 

(11 months UNAM México) 

RNDr. Jiří Nedoma, CSc. 

RNDr. Klára Řeháková, Ph.D. 

Aquatic microbiology, bacteria-protozoa interactions, 

bacterial community composition 

Ecobiology of Isoëtes 

Bacterioplankton community composition and activity 

Protozoan-bacterial interactions 

Identification of cyanobacterial picoplankton 

Plankton primary production, phytoplankton analyses, 

taxonomy of algae 

Protozoa-bacteria interactions, freshwater ciliates, 

biological waste water treatment 

Microbial biochemistry, image analysis 

Phytoplankton analyses, polyphasic aproach of taxonomy 

of Nostocales 

6

RNDr. Dagmar Sirová 

(maternity leave) 

RNDr. Viera Straškrábová, DrSc. 

Doc. RNDr. Jaroslav Vrba, CSc. 

RNDr. Eliška Zapomělová, PhD 

RNDr. Petr Znachor, Ph.D. 

Benthic cyanobacterial mats, ecology of rootless 

carnivorous plants 

Aquatic microbiology, BOD, interactions with phyto- and 

zooplankton, long-term ecological research 

Aquatic microbiology, extracellular enzyme activity 

Morphology of cyanobacteria 

Phytoplankton and reservoir ecology, fluorescence 

techniques, microphotography 

Department of Hydrochemistry and Ecosystem Modelling: 

Doc. Ing. Josef Hejzlar, CSc. 

(Head) 

RNDr. Jakub Borovec, Ph.D. 

RNDr. Jiří Kaňa, Ph.D. 

Prof. Ing. Jiří Kopáček, Ph.D. 

Ing. Josef Polívka 

Ing. Petr Porcal, Ph.D. 

Reservoir limnology and eutrophication 

Reservoir limnology, chemistry of sediments 

Water and soil chemistry 

Analytical chemistry, soil-water interactions 

Ecological modelling 

Aquatic dissolved organic matter 

TECHNICAL STAFF: 

Jindra Bučková 

Alena Hartmanová 

Ing. Vladimíra Hejzlarová 

Vladimír Jirák 

Martina Kaňová-Vožechová 

Ing. Jitka Kroupová 

Alena Kubátová 

Marie Kupková 

Václava Lavičková 

RNDr. Blanka Macháčková 

Ing. Radka Malá 

Ing. Petr Mautschka 

Mgr. Petra Mošnerová 

Mgr. Karel Murtinger 

Cleaner 

Bacteriological analyses, cultivation 

Chemical analyses 

Building maintenance, electrician 

Secretary, laboratory analyses 

Chemical analyses 

Cleaner 

Phytoplankton analyses 

Documentalist 

Zooplankton analyses 

Bacteriological analyses, cultivation of microbes 

Technical and financial management, computer 

maintenance, network administration 

Hydrochemistry 

Analytical chemistry 

7

Zdeněk Prachař 

Mgr. Kateřina Soukalová 

Soňa Smrčková, DiS. 

(maternity leave) 

Jana Šindelářová 

Dagmar Šrámková 

Marie Štojdlová 

RNDr. Hana Švejdarová 

MGr. Alena Volková 

MUDr. Jana Zemanová 

RNDr. Jiří Žaloudík, CSc. 

Field assistance, zooplankton analyses 

Fish biology 

Bacteriological analyses, data processing 


Secretary, accountant 

Biochemical analyses, image analysis 

Socioeconomical analyses 


Zooplankton analyses and culture maintenance 

GIS in hydrology and landscape ecology 

Ph.D. STUDENTS: 

Mgr. Kateřina Bernardová 

Mgr. Jiří Jan 

Mgr. Martin Jankovský 

Mgr. Tomáš Jůza 

Mgr. Vojtěch Kasalický 

Mgr. Michal Kratochvíl 

Mgr. Monika Krolová 

Mgr. Milan Muška 

Mgr. Pavel Rychtecký 

Mgr. Milan Říha 

Mgr. Jana Svobodová 

Mgr. Jan Turek 

Mgr. Michal Tušer 

Mgr. Ivana Vaníčková 

Molecular biology of cyanobacteria 

Sediment chemistry 

Fish biology 

Fish sampling and community structure 

Bacterial-algal interactions 

Ecology of larval and juvenile fish, electrofishing 

Macrophyta in reservoirs 

Fish distribution and scientific echosounder techniques 

Phytoplankton ecology 

Fish sampling and development of fish populations 

Benthos 

Hydrology and water chemistry 

DIDSON-based Fish Assessment 

Zooplankton ecology and molecular taxonomy 

8

1 INTRODUCTION 

1.1 Directors’ preface 

The saddest event in the year 2010 was the death of associated professor Jaroslav Hrbáček - 

the founder of the Hydrobiological research group at the Academy of Sciences of the Czech 

Republic - now the Institute of Hydrobiology of the Biology Centre of the Academy of 

Science of the Czech Republic. See Chapter 2 on page 15 of this Annual Report for his 

obituary. 

The research orientation of the Institute remained unchanged focusing on reservoirs and 

selected types of lakes. Regular long-term monitoring with some special investigations 

continued in the Slapy and Římov reservoirs, and so did the research on lakes in the 

Bohemian Forest and in the Slovakian and Polish High Tatra Mts. The Institute continued the 

investigation of flooded coal mining pits in North-West Bohemia with respect to succession 

of biota in newly created lake-like freshwater ecosystems. Field research was supplemented 

by focused laboratory experiments. 

In 2010, an important event was the preparation of materials for the periodic evaluation of 

the Institute by the Academy of Sciences. The evaluated period included the years 2005–2009 

with respect to developmental trends between 2002–2007. At this evaluation foreign referees 

were included. 

Since 2010 IHB is the seat of the Czech National Committees of the inernational Man and 

Biosphere (MAB) and LTER (Long-term ecological research) programmes. Both the 

secretary E. Jelínková (for both committees) and the head of the Czech National LTER 

Committee, J. Vrba, are members of IHB. IHB is responsible for two sites in the global LTER 

and GTOS (global terrestrial observing networks) programmes - Slapy Reservoir and Římov 

Reservoir, as well as for lake sites located inside the LTSER (Long-term social ecological 

research) platform Silva Gabreta (in the Šumava National Park and the Bavarian National 

Park). More details can be found on the website http://www.lter.cz. 

Close cooperation of the IHB with the Faculty of Biological Sciences, University of South 

Bohemia, has continued under similar conditions as in preceding years. Institute members 

have also been actively engaged supervising students’ theses, lecturing and training students 

at other Faculties (Agricultural and Pedagogical) of the University of South Bohemia and at 

other universities (Charles University, Prague; Institute of Chemical Technology, Prague; 

Masaryk University, Brno). 

Josef Matěna 

9

1.2 Projects 

Institutional project 

2005–2010 Reg. code AV0Z60170517, Structure, functioning and development of aquatic 

ecosystems (J. Matěna) 

European Communities R&D program (7 th framework) 

2010–2014 Reg. code 244121, Adaptive strategies to mitigate the impacts of climate change 

on European freshwater ecosystems (J. Hejzlar) 

Project supported by the "Norwegian financial mechanism" 

2007–2011 Reg. code EEA NFM CZ0051, The assesment of impact of the Gothenburg 

Protocol on acidified and eutrophied soils and waters (J. Kopáček, J. Matěna, coordinated 

by Czech Geological Survey, Praha) 

2008–2011 Reg. code EEA NFM CZ0091, Monitoring of the fish stock of Czech Reservoirs 

(J. Kubečka, J. Peterka) 

Project sponsored by the Ministry of Education, Youth and Sports of CR 

2008–2010 Reg. code OC08040, Nutrient sources in catchments with complex land use and 

impacts on the aquatic ecosystems of reservoirs (J. Hejzlar) 

Projects sponsored by the Ministry of Agriculture of CR 

2008–2012 Reg. code QH81046, Optimalisation of the biomanipulative effect of predatory 

fish in the ecosystems of water reservoirs. (J. Kubečka) 

2008–2011 Reg. code QH82078 (NAZV), Water retention in floodplains and measures of its 

increase (J. Žaloudík) 

2008–2011 Reg. code QH81012, The use of aeration technologies in the reduction of 

cyanobacterial resting stages and nutirent bioavalilability in reservoir sediments 

(J. Borovec) 

2010–2013 Reg. code QI102A265, Determination of the importance of erosion-originated 

phosphorus in water bodies endangered by eutrophication (J. Hejzlar) 

Projects sponsored by the Grant Agency of the Academy of Sciences of CR 

2008–2010 Reg. code KJB600960810, Effect of food quantity and quality on the reverse in 

competitive success between 0+ perch and roach (J. Peterka) 

2009–2011 Reg. code KJB600960907, What are the main mechanisms affecting N flow 

through soil N pools in N saturated mountain soils? (J. Kaňa) 

2009–2012 Reg. code IAA600960901, Hybrid zones in pelagic environments: which factors 

are critical for local dominance of Daphnia hybrids within reservoirs? (J. Seďa) 

Projects sponsored by the Grant Agency of CR 

2007–2010 Reg. code 206/07/1392, Horizontal acoustic surveys and fish behaviour in the 

open water (J. Kubečka) 

2007–2011 Reg. code 206/07/1200, Constraints and limits of biological recovery from acid 

stress: What is the future of headwater ecosystems in the Bohemian Forest? (J. Vrba) 

10

2008–2012 Reg. code 206/08/0015, Ecophysiological traits and grazing- and virus-induced 

mortality of bacterial strains representing major bacterioplankton groups in a reservoir 

(K. Šimek) 

2009–2012 Reg. code 206/09/1325, Cyclical parthenogenesis in vertically diversified 

environment: genetic differentiation and reproductive segregation in population of Daphnia 

galeata (J. Macháček) 

2009–2012 Reg. code 206/09/1764, Controlling factors of phosphorus sorption in lake and 

reservoir sediments (J. Hejzlar) 

2009–2011 Reg. code 206/09/P266, Predator avoidance strategies in early life stages of 

percid fishes (M. Čech) 

2009–2013 Reg. code 206/09/0309, Competition mechanisms in Cyanobacteria affecting 

phytoplankton species composition (K. Řeháková) 

2009–2013 Reg. code GA526/09/0567 The integrated impact of climate change, air quality, 

and forest management on water ecosystem in headwater catchments. (J. Kopáček, 

coordinated by Faculty od Science UK, Praha) 

2010–2012 Reg. code P504/10/0566, Distribution, phylogeography and intraspecific 

ecological diferentiation within the cluster Limnohabitans and Polynucleobacter 

necessarius subsp. asymbioticus (J. Jezbera) 

2010–2013 Reg. code EEF/10/E011, Functional role and ecotype divergence in 

Actinobacteria of the AcI lineage (J. Jezbera) 

2010–2012 Reg. code P504/10/1501, Taxonomic revision of the genera Anabaena and 

Aphanizomenon (Cyanobacteria) based on complex morphological and molecular approach 

(E. Zapomělová) 

2010–2012 Reg. code P504/10/1534, Influence of phytoplankton on bacterial community 

composition and activity under varying trophic status, principal investigator (K. Horňák) 

International projects 

2008–2010 Interreg IV, Cross-Border Water Conservation in the Drachensee Catchment 

(J. Žaloudík) 

2009–2010 Reg. Code 09-14, Estimation of fish yield potential in lakes – Institut für 

Binnenfescherei e.V. Postdam, Germany (J. Kubečka) 

2009–2010 Calibration of sampling methods for spanish fish populations in reservoirs, 

Spanish Ministry of Environment, Spain (J. Kubečka) 

2009–2010 Reg. Code A/CZ0046/2/0029, Monitoring the environment of man-made lakes: 

what can fisheries data and models tell us? Norwegian Education Fund, Norway 

(J. Kubečka) 

2010–2011 Threadfin Shad Prey Production in Tropical Reservoirs. Mississippi State 

University (M. Prchalová) 

1.3 Consultancies 

2009–2010 Complex assessment of the fish stock of Nyrsko, Zelivka and Rimov Reservoir. 

(J. Kubecka et al.) Vltava Rivers Authority. 

2010–2012 Reg. code "Monitoring–Fischerei"/NP5 Fish stock assessment of the 

Neuiedlersee by acoustic and direct sampling. (J. Kubečka) Burgenland administration, 

Austria 

2010 Evaluation of the length-weight relationships in the Fishing Regulations Book of the 

Czech Fishing Union. Czech Fishing Union (M. Prchalová) 

11

1.4 Report on finances 

(in thousands CZK) 

SALARIES & CONSUMABLES 

Income 

Support by Academy of Sciences 

including the "Priority research programme". 17,006 

Conference 750 

Grants from Grant Agency AS CR 1,296 

Grants from Grant Agency CR 9,303 

Grants – balance from 2008 102 

Other domestic grants 1,818 

Foreign grants 6,717 

Consultancies excluding VAT 7,506 

Depreciation 7,758 

Total 52,256 

Expenses 

Salaries 20,851 

Health and social insurance, social funds 7,203 

Energy 899 

Gasoline 370 

Maintenance and equipment 647 

Postage, telephone, internet 250 

Books, journals 618 

Conference fees 210 

Travelling costs 2,400 

Software 381 

Other consumables and small equipment 3,852 

Depreciation 5,962 

Miscellaneous 7,758 

Saving for the next year 855 

Total 52,256 

12

EQUIPPMET 

Income 

Reserve for investment 517 

Grants from "Norwegian funds" 44 

Grants from Grant Agency CR 96 

Foreign grants 1,040 

Support by Academy of Sciences 1,571 

Support by Academy of Sciences for expensive equippment 1,760 

Transfer from Salaries & consumables 1,060 

Total 5,290 

Expenses 

Software SIMCAT 308 

System for ultrapure water production 160 

Fluorescence microskope 2,130 

Multiparametric probe YSI 600 

Realtime cycler 1,300 

Others 237 

Saving for the next year, balance 38 

Total 4,773 

13

1.5 Students’ theses finished in 2010 

Mgr. 

(M.Sc.) 

Jana Svobodová: Structural changes of macrozoobenthic communities in 

longitudinal profiles of acidified streams in the Bohemian Forest (Czech 

Republic). (Faculty of Science, University of South Bohemia, supervised by 

J. Matěna) 

Bc. 

(B.A.) 

Petr Blabolil: The factors affecting early survival of pikeperch larvae and 

juveniles in the deep canyon shaped reservoirs. (Faculty of Science, University 

of South Bohemia, supervised by J. Peterka) 

Eduard Bouše: Dynamics of abundance of selected fish species. (Faculty of 

Science, University of South Bohemia, supervised by J. Kubečka) 

Jaroslav Krafl: Extracelular phosphatases of bacteria in the water environment. 

(Faculty of Science, University of South Bohemia, supervised by J. Nedoma) 

Zuzana Sajdlová: Fish avoidance during sampling by the pelagic trawl. (Faculty 

of Science, University of South Bohemia, supervised by J. Kubečka) 

Marek Šmejkal: The importance of various habitats for fish in reservoirs. 

(Faculty of Science, Charles University, Prague, supervised by M. Prchalová) 

Iva Tomková: The effect of deforestation of mountain catchments on surface 

water quality (Faculty of Science, University of South Bohemia, supervised by 

J. Kopáček) 

Lukáš Vejřík: Determination of real daily food intake of great cormorant 

(Phalacrocorax carbo) wintering on Vltava River in Prague – Troja. (Faculty 

of Science, University of South Bohemia, supervised by M. Čech) 

Lukáš Veselý: The relationship between fish stock and reservoir characteristics. 

(Faculty of Science, University of South Bohemia, supervised by J. Kubečka) 

Veronika Visocká: Impact of ongoing global climate change on phytoplankton 

in Central Europe. (Faculty of Science, University of South Bohemia, 

supervised by P. Znachor) 

Jitka Vítková: Impact of floods and extreme precipitations on phytoplankton 

assemblage in freshwater reservoirs. (Faculty of Science, University of South 

Bohemia, supervised by P. Znachor) 

14

2 JAROSLAV HRBÁČEK (1921–2010) 

He passed away on the 16 th of July, 2010, aged 89, and remains without exaggeration the 

greatest Czech limnologist, respected around the world in limnological circles. 

His interest in zoology and aquatic ecosystems dated from an early age, and it was not 

„platonic“: by 1950 (he was 29 at the time) he was publishing papers in international 

zoological journals, mainly on water beetles [1]. Ten years later he had progressed to 

Cladocera [2], which remained his favourite group for the rest of his life. Few are aware of the 

fact that the Czech universities were shut down by the Germans in 1939, when Hrbáček was 

eighteen. He was thus able to resume his studies only after the war. He majored in 1949 in 

biology and chemistry, with a dissertation on water beetles. He then worked as a research 

assistant at the Charles University in Prague until 1958. During this period (using partly grant 

finance, but predominantly his own funding) he established a hydrobiological field station 

near the Elbe (Labe) River in Central Bohemia, equipped to enable both biological and 

chemical (nutrient analysis) research of backwaters, and put together a team of co-workers 

with diverse specialisations. His approach to the study of aquatic ecosystems was systemic 

Jaroslav Hrbáček (middle) together with Prof. Nauwerck 

and Ms. Nauwerck at the Institute of Hydrobiology (24 Jun 2010) 

and complex. Already in 1958 he published a paper [3] where he explains the influence of 

feedback mechanisms from fish all the way to nutrients. Another paper, published in 1962, 

elaborated on and clarified this key topic, and, although published „only“ in the journal of the 

Czechoslovak Academy of Sciences (Rozpravy ČSAV), it became his most-quoted article [4]. 

It also served as a springboard for biomanipulation approaches in aquatic ecosystems. He 

received the Naumann-Thienemann Medal of the International Society of Limnology (SIL) 

for this work in 1983. 

15

In 1959, the Hydrobiological Section (later Hydrobiological Laboratory) of the 

Czechoslovak (later Czech) Academy of Sciences was established in Prague. Highly 

unusually and surprisingly at that time, the new department was given the go-ahead by the 

authorities despite the fact that neither J. Hrbáček, nor any other member of staff were 

Communist Party members. Its main task was to study the limnology of river impoundments, 

which were starting to be built in the country around this period. The long-term research of 

the Slapy Reservoir (on the Vltava River) dates from this year, as well as the founding of the 

Nebřich hydrobiological field station. The Klíčava Reservoir was another impoundment 

studied under Hrbáček´s leadership during this period, with intensive research carried out 

especially in 1967, as part of the International Biological Programme (IBP). The results of the 

complex research of the Slapy Reservoir were published by the Academia publishing house 

[5,6]. 

In the years 1981–1985 the Hydrobiological Laboratory was gradually moved to the South 

Bohemian city of České Budějovice, J. Hrbáček stopped being head and remained in Prague. 

In 1988–1995 he resumed his old interest of river backwaters research, in collaboration with 

the team of the Ecological Section of the Botanical Institute in Třeboň. He focussed on pools 

permanent and periodic, aerobic and anaerobic, with fish and without, in the innundation zone 

of the Lužnice River [7]. 

Finally, during the last 15 years of his life, he returned to the study of the Slapy Reservoir, 

measured temperature, pH and transparency at weekly intervals, and compared them with 

older data. Despite his old age and various illnesses he remained tireless and mentally alert 

and active. In fact only two weeks before his death he arrived in České Budějovice for a chat 

with his old friends, prof. Arnold Nauwerck (former head of the Limnological Institute of the 

Austrian Academy of Sciences) and his wife, and mentioned his plans of resuming his Slapy 

research within a week´s time! 

Viera Straškrábová 

[1] Hrbáček, J., 1950: On the morphology and function of the antennae of the Central European 

Hydrophilidae (Coleoptera). The Transactions of the Royal Entomol. Soc. of London 101,7: 239– 

256. London 

[2] Hrbáček, J., 1959: Circulation of water as a main factor influencing the development of helmets in 

Daphnia cucullata Sars. Hydrobiologia, 13: 170–185. 

[3] Hrbáček J. 1958: Density of the fish population as a factor influencing the distribution and 

speciation of the species in the genus Daphnia. Proceedings of the 15th International Congress of 

Biology, London 10: 794–795. 

[4] Hrbáček, J., 1962: Species composition and the amount of the zooplankton in relation to the fish 

stock. Rozpravy ČSAV 72, 10: 116pp. 

[5] Hrbáček, J. (ed.), 1966: Hydrobiological Studies 1, Academia, Prague, 408pp. 

[6] Hrbáček, J., Straškraba, M. (eds), 1973: Hydrobiological Studies 2, Academia, Prague, 348pp 

[7] Hrbáček, J., Pechar, J., Dufková, V., 1994: Anaerobic conditions in winter shape the seasonal 

conditions of Copepoda and Cladocera in pools in forested inundations. Verhandlungen Internat. 

Verein. Limnol. 25: 1335–1336. 

NOTE: for the complete Jaroslav Hrbáček bibliography see Appendix (p. 45) 

16

3 RESERVOIRS 

3.1 Regular monitoring of the reservoirs Slapy and Římov: dissolved and dispersed 

substances in 2010 

Annual and summer (April–September) mean concentrations of chemical constituents 

dissolved and dispersed in the surface layers of the Slapy and Římov reservoirs (Table 1) 

were obtained by J. Hejzlar and J. Kopáček (jkopacek@hbu.cas.cz). Samples were taken 

from 0.1 to 0.4 m depth at the deepest points of the reservoirs in three-week intervals, prefiltered 

through a 200-µm polyamide sieve to remove large zooplankton, stored in the dark at 

4 o C, and analysed within 48 h after sampling. Dissolved constituents were analysed in 

samples filtered through a glass fibre filter with 0.4 µm nominal pore size. Abbreviations in 

Table 1 are: TON, total organic nitrogen; DON, dissolved organic nitrogen; TN total 

nitrogen; TP, total phosphorus; TDP, total dissolved phosphorus; COD, chemical oxygen 

demand; DOC and POC, dissolved and particulate organic carbon, respectively. 

Table 1: Annual (n=17) and summer (April–September; n=9) mean composition of the surface 

waters of the Slapy and Římov reservoirs in 2010. 

VARIABLES UNIT MEAN VALUES 

Slapy 

Římov 

Annual Summer Annual Summer 

NO 3 –N µg l –1 2218 2731 1295 1195 

NO 2 –N µg l –1 16 29 8 11 

NH 4 –N µg l –1 24 34 40 41 

TON µg l –1 766 824 575 680 

DON µg l –1 696 721 502 565 

TN µg l –1 3024 3618 1918 1927 

TP µg l –1 53.7 45.2 31.6 28.7 

TDP µg l –1 38.5 22.1 21.3 16.3 

COD mg l –1 21.7 20.5 17.2 17.2 

DOC mg l –1 7.43 7.41 5.86 6.67 

POC mg l –1 0.68 1.06 0.54 0.80 

Ca 2+ mg l –1 20.8 22.2 11.1 10.7 

Mg 2+ mg l –1 5.8 6.4 2.7 2.6 

Na + mg l –1 10.4 11.4 6.0 5.7 

K + mg l –1 4.0 4.0 2.1 2.1 

2– 

SO 4 mg l –1 24.1 26.7 13.7 13.6 

Cl – mg l –1 14.4 16.4 5.4 5.4 

Alkalinity (Gran titration) meq l –1 0.98 0.98 0.51 0.49 

Conductivity at 25 o C µS cm –1 219 240 120 114 

17

3.2 Regular monitoring of the reservoirs Slapy and Římov: microbial characteristics, 

chlorophyll and zooplankton biomass in 2010 

Annual and summer mean concentrations of bacteria, protozoans, microzooplankton, BOD 5 

(total and after separating algae by filtration) as well as chlorophyll concentrations and 

zooplankton biomass in the reservoirs (and inflows to Římov Reservoir), based on 

data by Z. Brandl, M. Macek, R. Malá, A. Hartmanová, Z. Prachař, J. Seďa, K. Šimek, 

M. Štojdlová, V. Straškrábová (verastr@hbu.cas.cz), M. Kaňová and P. Znachor are shown 

in Table 2. 

Table 2: Mean values of microbial characteristics, zooplankton, chlorophyll and BOD in the Slapy 

and Římov reservoirs and inflows. "Summer": April to September. 

Sites: S–Slapy and R–Římov reservoirs, C–Černá and M–Malše rivers – inflows to Římov 

Reservoir. Zooplankton in Římov was not sampled in January – February. 

SITE VARIABLE LAYER UNIT MEAN VALUE 

Annual Summer 

S BOD 5 0 m mg l –1 O 2 1.52 1.77 

BOD 5 filtered 0 m mg l –1 O 2 – 1.51 

bacteria DAPI 0 m 10 6 ml –1 4.39 6.16 

bact. beef-pept. agar 0 m CFU ml –1 284 237 

het. nanoflag. 0 m 10 3 ml –1 1.48 2.41 

ciliates 0–3 m per ml 5.22 8.35 

chlorophyll a 

total 0–3 m mg m –3 4.36 7.91 

40µm 0–4 m mg m –3 3.00 5.27 

zooplankton biomass, protein N 

Cladocera herbiv. 0–40 m mg m –2 61.5 76.3 

Copepoda 0–40 m mg m –2 26.7 35.2 

total zooplankton 0–40 m mg m –2 87.4 111.8 

C BOD 5 0 m mg l –1 O 2 1.87 1.56 

chlorophyll a 0 m mg m –3 4.06 4.60 

M BOD 5 0 m mg l –1 O 2 2.15 1.74 

chlorophyll a 0 m mg m –3 5.17 7.01 

18

3.3 Regular monitoring: fish stock composition in the Římov Reservoir in 2010 

Regular monitoring of the Římov Reservoir fish stock was carried out in the second week of 

August 2010. Open water and deeper benthic habitats were studied using a split-beam 

echosounder, gillnets, purse seine net and pelagic fry and adult trawls. The inshore area was 

monitored as usual using electrofishing and night seining (see Říha et al. 2008 [1] for the 

method description). Field work was carried out by J. Kubečka, P. Blabolil, J. Čech, 

V. Draštík, J. Frouzová, T. Jůza, L. Kočvara, M. Kratochvíl, J. Peterka, Z. Prachař, 

M. Prchalová, J. Richta, Z. Sajdlová, K. Soukalová, M. Šmejkal, M. Tušer, M. Vašek, 

L. Vejřík, and L. Veselý. The catch was analysed by M. Říha (riha.milan@centrum.cz) and 

J. Kubečka. During night seining, a total of 1.48 hectares was fished in 7 hauls using a nets 50 

and 200 m long. Table 3 shows the Římov Reservoir species composition as estimated by 

night seining. 

Table 3: Composition of the fish stock of the Římov Reservoir in 2010 as estimated by night seining. 

Common Latin name Abundance Biomass % % 

name ind ha –1 kg ha –1 Abundance Biomass 

Perch Perca fluviatilis 78.26 2.03 9.94 2.24 

Roach Rutilus rutilus 326.21 24.37 41.42 26.86 

Bream Abramis brama 163.95 56.80 20.82 62.61 

Rudd Scardinius erythrophthalmus 10.13 0.36 1.29 0.39 

Pike Esox lucius 4.59 3.61 0.58 3.98 

Asp Aspius aspius 3.31 0.71 0.42 0.78 

Dace Leuciscus leuciscus 1.34 0.01 0.17 0.02 

Bleak Alburnus alburnus 28.36 0.71 3.60 0.78 

Ruffe Gymnocephalus cernua 163.66 1.05 20.78 1.16 

Pikeperch Sander lucioperca 4.26 0.64 0.54 0.71 

Hybrid Abramis x Rutilus 2.61 0.25 0.33 0.28 

Carp Cyprinus carpio 0.42 0.04 0.05 0.04 

Wels Silurus glanis 0.42 0.14 0.05 0.15 

Total 787.52 90.72 100.00 100.00 

In 2010, the littoral fish community of the Římov Reservoir was dominated by common 

bream Abramis brama, roach Rutilus rutilus, ruffe Gymnocephalus cernua and perch Perca 

fluviatilis. This composition was similar to previous years with slight change in higher 

proportion of perch and lower proportion of bleak in catch. The total fish biomass reached 

90.7 kg ha –1 . It is similar as in the year 2008 and in previous seven years. 

In the year 2010, the dominant roach and bream had lower abundance but bream had 

higher biomass in comparison with the year 2009. In 2009, considerable proportion in high 

catch of bream was represent by individual with age 1+ from strong year class 2008 (Jůza 

pers. comm.). In the year 2010, year class 2008 (fish of the age 2+) still represented 

considerable part of bream catch because year class 2009 was weak (Jůza pers. comm.) and 

had low representation (fish of the age 1+) in the catch. This disproportions in year classes 

caused decrease of bream abundance while biomass increased due to relatively high 

19

proportion of larger individuals. These population oscillations were expected and are 

characteristic for the species in the reservoir. The results of sampling in the year 2010 well 

fitted into the long-term development of the fish stock of Římov Reservoir [2]. 

[1] Říha, M., Kubečka, J., Mrkvička, T., Prchalová, M., Čech, M., Draštík, V., Frouzová, J., Hladík, 

M., Hohausová, E., Jarolím, O., Jůza, T., Kratochvíl, M., Peterka, J., Tušer M., and Vašek, M. 

(2008): Dependence of beach seine net efficiency on net length and diel period. Aquatic Living 

Resources, 21(4): 411–418. 

[2] Říha, M., Kubečka, J., Vašek, M., Seďa, J., Mrkvička, T., Prchalová, M., Matěna, J., Hladík, M., 

Čech, M., Draštík, V., Frouzová, J., Hohausová, E., Jarolím, O., Jůza, T., Kratochvíl, M., Peterka, 

J., and Tušer, M. (2009): Long-term development of fish populations in the Římov Reservoir. 

Fisheries Management and Ecology 16: 121–129. 

3.4 The effect of river water circulation on the distribution and functioning of reservoir 

microbial communities as determined by a relative distance approach 

K. Šimek (ksimek@hbu.cas.cz), J. Nedoma, M. Comerma, J.-C. Garcia, J. Armengol, and 

R. Marce (Department of Ecology, University of Barcelona, Spain) collaborated on a research 

project dealing with the factors shaping longitudinal gradients modulated by different 

circulation patterns in the eutrophic reservoir Sau, Catalonia, Spain. 

The reservoir is characterized as showing: (I) high nutrient and organic matter inputs; (II) 

morphology typical for a deep and narrow river valley reservoir; and (III) a typical water 

residence time of ~90 days. Thus, we anticipated finding clear longitudinal patterns and 

relationships between limnological and biological parameters along the reservoir even over 

different seasons of a year. We hypothesized that development and the maxima of bacterial, 

heterotrophic nanoflagellates (HNF) and ciliate communities, and thus organic carbon 

processing, are directly related to the proportion of nutrients and organic matter rich river 

water that is mixed into the reservoir epilimnion. 

To test these hypotheses, we analyzed 8 sampling campaigns conducted between 1996 and 

1999 covering all seasonal aspects of the hydrology of the reservoir i.e., covering a wide 

range of variability in both seasonal and spatial circulation patterns. Then the spatial 

heterogeneity was examined using a relative distance model that allows standardization of the 

typical patterns in plankton succession under different hydrological situations (cf. Figs. 1 

and 2). Study aims were [1]: (a) to propose a general method that allows for the comparison 

and prediction of common trends in the spatial dynamics of plankton communities and their 

functioning under different hydrological scenarios in canyon shaped reservoirs; and (b) to 

specifically analyze the influence of overflow events on organic carbon processing and 

oxygen saturation levels of the epilimnetic layer of the Sau Reservoir. 

To objectively compare the biological longitudinal gradients under seasonally fluctuating 

water levels and different types of water circulation patterns, we applied a model based on the 

relative distance of a sampling station from the river inflow (Fig. 1). Even under different 

hydrological scenarios, the model was able to characterize epilimnetic food chain successions 

and locations of peaks of bacteria, heterotrophic nanoflagellates, ciliates, phytoplankton, and 

zooplankton along the longitudinal gradient (Fig. 2). The amplitude of microbial peaks was 

directly related to the proportion of nutrient and organic carbon rich river water that mixed 

into the reservoir epilimnion. Enhanced abundances and activities of microbes were detected 

20

Fig. 1: A – Schematic drawing of water circulation patterns, i.e. over-, inter- and underflow, in deep 

canyon shaped reservoirs. Depending on water temperature and water quality parameters river 

water masses plunge to different strata of the reservoir. Downstream from the plunge point a 

transient mixing zone starts with a very strong gradient in water quality parameters (for details 

see [1]). In addition to the type of water circulation pattern, chemical and biological 

downstream longitudinal gradients are directly related to the differences between the river and 

reservoir water quality parameters, mainly in organic carbon and nutrient availability. 

DOC – dissolved organic carbon, TP – total phosphorus, SRP – soluble reactive phosphorus, 

TN – total nitrogen, NH 4 – ammonium. 

B – schematic drawing of the effect of different water levels (level 1–3) on the total length of 

the reservoir. To facilitate the comparison of common features of longitudinal gradients under 

fluctuating water levels, a relative distance model is exploited, where the actual length of the 

reservoir is always subdivided into the same number of standardized nine sampling positions 

("alignment positions") between zero and one rounded to one decimal place (for details see 

[1]). An example of standardized relative distance positions (RDP) is given for the level 2, 

which corresponds to medium decreased water level in the reservoir. 

21

Fig. 2: Standardized characteristic downstream succession of plankton communities based on the 

relative distance model and rounded relative distance positions (RDP) of percentage of 

bacterial, HNF, ciliates and zooplankton abundances, bacterial biomass and production, total 

protozoan bacterivory and chlorophyll a concentrations evaluated in eight longitudinal 

transects. Note that percentage values plotted against 9 RDPs, i.e. 0.1, 0.2 ..... 0.9, give a sum 

of 100% over the longitudinal transect. The values are means and the grey filled areas 

show ±1SD. 

22

in spring and summer periods, mainly during events of river water overflow when a large 

proportion of the river was directly mixed into the epilimnion. Thus, the relative input of river 

water is suggested to be a useful predictor of the amplitude of the development of the 

epilimnetic microbial food webs in highly nutrient loaded canyon-shape reservoirs [1]. These 

results may have important implications in the context of global change in Mediterranean 

regions, where expected reductions in runoff may profoundly affect river water circulation 

patterns in reservoirs and hence organic carbon cycling in these ecosystems. 

Cited reference supported by the ongoing project 206/08/0015: 

[1] Šimek K, Comerma M, García JC, Nedoma J, Marcé R, Armengol J. 2011: The effect of river 

water circulation on the distribution and functioning of reservoir microbial communities as 

determined by a relative distance approach. Ecosystems 14: 1–14. 

3.5 Horizontal acoustic surveys and fish behaviour in the open water (completed 

project) 

Grant Agency of the Czech Republic, 2007–2010 project No. 206/07/1392. 

Principal investigator: J. Kubečka (kubecka@hbu.cas.cz). Cooperation: H. Balk 

(University of Oslo, Norway), G. Rakowitz (University of Vienna, Austria), 

M. Prchalová, J. Frouzová, M. Čech, V. Draštík, T. Jůza, M. Kratochvíl, J. Peterka, 

M. Říha, M. Tušer, and M. Vašek (Institute of Hydrobiology BC AS CR, České 

Budějovice). 

The project was broadly aimed at overcoming the basic problems of quantitative studies of 

fish in the open water of the reservoirs. Open water represents the largest volume of 

reservoirs. At the start of the project the scientific community lacked reliable information on 

quantity, species and age distribution of fish in the open water of European reservoirs. Most 

data available were from passive gillnet sampling with unknown selectivity or from semiquantitative 

echosounder results. Methods for studying pelagic fry communities were 

completed during the project and used in a number of reservoirs. A two-dimensional 

predictive model of cyprinid and percid fry occurrence in the Římov Reservoir was elaborated 

with respect to its longitudinal dimension and depth (Jůza et al., 2009). Even greater progress 

was achieved with larger (mostly adult) fish. The first holistic models of fish occurrence in 

Želivka and Římov Reservoirs were developed on the basis of gillnet sampling (Prchalová et 

al., 2008 and 2009). Hydroacoustic and trawling methods were further developed for the 

sampling of the open water adult fish community and possible shortcomings were critically 

analysed (Rakowitz et al., submitted). 

Quality assurance of information on reservoir fish was often missing in the past and this 

project has contributed substantially to achieving and assuring the quality. In adition to the 

methodological advances made, the project has facilitated several studies of open water fish 

behaviour (Jarolím et al. 2010). 11 publications were printed and seven more submitted in 

journals covered by Thomson’s Web of Knowledge (WOK), three of the latter had been 

accepted accepted by the report deadline. 5 more publications not covered by WOK were 

published. Three PhD and three MSc. theses have been completed and four PhD and two 

MSc. Theses were in progress by the report deadline. Two worldwide conferences 

summarizing the state-of-the-art in the sampling of lakes and reservoirs, each with over 100 

participants from over 30 countries, were organized by the project team (Kubečka et al. 2009). 

The second one of these, Fish sampling with active methods, was held in September 2010 in 

České Budějovice (http://fsam2010.wz.cz). 

23

[1] Jarolím, O., Kubečka, J., Čech, M., Vašek, M., Peterka, J., and Matěna, J., 2010. Sinusoidal 

swimming in fishes: the role of season, density of large zooplankton, fish length, time of the day, 

weather condition and solar radiation. Hydrobiologia 654: 253–265. DOI 10.1007/s10750-010- 

0398-1. 

[2] Jůza, T., Vašek, M., Kubečka, J., Seďa , J., Matěna, J., Prchalová M., Peterka, J., Říha, M., 

Jarolím, O., Tušer, M., Kratochvíl, M., Čech, M., Draštík, V., Frouzová, J., and Hohausová, E., 

2009. Pelagic underyearling communities in a canyon-shaped reservoir in late summer. Journal of 

Limnology 68: 304–314. DOI: 10.3274/JL09-68-2-13. 

[3] Kubečka, J., Amarasinghe, U.S., Bonar, S.A., Hateley, J.A., Hickley, P., Hohausová, E., 

Matěna, J., Peterka, J., Suuronen, P., Tereschenko, V., Welcomme, R., Winfield, I.J., 2009 The 

true picture of a lake or reservoir fish stock: a review of needs and progress. Fisheries Research 96: 

1–5. DOI: 10.1016/j.fishres.2008.09.021. 

[4] Prchalová, M., Kubečka, J. Vašek, M., Peterka, J. Seďa, J., Jůza, T., Říha, M., Jarolím, O., 

Tušer, M., Kratochvíl, M., Čech, M., Draštík, V., Frouzová, J., Hohausová, E. 2008 Gradients of 

fish distribution in a canyon-shaped reservoir. Journal of Fish Biology 73: 54–78. 

[5] Prchalová, M., Kubečka, J., Čech, M., Frouzová, J., Draštík, V., Hohausová, E., Jůza, T., 

Kratochvíl, M., Matěna, J., Peterka, J., Říha, M., Vašek, M., 2009 The effect of depth, distance 

from dam and habitat choice on the spatial distribution of fish in canyon-shaped reservoir. Ecology 

of Freshwater Fish 18: 247–260. 

3.6 Pelagic occurrence of non-native tubenose goby Proterorhinus semilunaris (Heckel) 

in a central European reservoir 

M. Vašek (mojmir.vasek@seznam.cz) and T. Jůza analysed samples of the pelagic 0+ year 

fish community collected in the deep-valley Vranov Reservoir in July 2008. The Vranov 

Reservoir, situated on the Dyje River (Czech Republic), is characterised by elongate 

morphology; it has a total surface area of 760 ha and a maximum depth of 45 m. The pelagic 

0+ year fish community was sampled in the surface stratum using a fixed-frame trawl with a 

3×3 m mouth opening. Trawling was conducted at night in the uplake (close to the tributary) 

and downlake (close to the dam) reservoir areas. A total of 810 individuals of 0+ year fishes 

representing six species were collected in surface pelagic waters. Thirty-one individuals of 0+ 

year tubenose goby Proterorhinus semilunaris (Heckel) were caught in the uplake area and 

the next 3 individuals were captured in the downlake area. The density of 0+ year P. 

semilunaris in the surface pelagic stratum varied between 0.02 and 0.81 individuals per 100 

m 3 of filtered water. Diet analyses demonstrated that 0+ year P. semilunaris were actively 

feeding in the pelagic waters. The typical limnetic zooplankter Leptodora kindtii was the most 

important prey consumed. However, 55% of P. semilunaris individuals also contained 

benthic-living prey (ostracods, isopods, chydorids, chironomid and ephemeropteran larvae). 

The inspection of gut contents showed that benthic prey usually occurred in the distal part of 

gut, while zooplankton was present in the foregut. 

These results indicate that 0+ year P. semilunaris migrated to the surface pelagic stratum 

either from bottom or littoral habitats. Such nocturnal migration to pelagic waters might be 

viewed as a behaviour optimizing foraging success and as a dispersal strategy. The ability of 

0+ year P. semilunaris to enter pelagic waters may have important implications for the 

dispersal success and, consequently, invasiveness of the species, which is currently spreading 

in Europe. Although P. semilunaris is commonly perceived as a typical benthic and sedentary 

fish, our results indicate that the species is able to actively utilise the open water habitat 

during its early juvenile stage [1]. 

[1] Vašek M., Jůza T., Čech M., Kratochvíl M., Prchalová M., Frouzová J., Říha M., Tušer M., 

Seďa J., Kubečka J., 2011: The occurrence of non-native tubenose goby Proterorhinus semilunaris 

in the pelagic 0+ year fish assemblage of a central European reservoir. Journal of Fish Biology 78: 

953–961. 

24

3.7 Deep spawning of perch Perca fluviatilis in the newly created opencast mine lake 

M. Čech (carcharhinusleucas@yahoo.com), J. Peterka, M. Říha, T. Jůza, V. Draštík, 

M. Kratochvíl and J. Kubečka evaluated the distribution of egg strands of perch Perca 

fluviatilis in an unique ecosystem of the newly created opencast mine Chabařovice Lake, 

Czech Republic. Three SCUBA divers spent over 120 hours underwater during which they 

found 896 (year 2007), 581 (2008) and 231 (2009) individual egg strands [1,2]. Depth 

distribution of egg strands differed significantly between sampling dates, being much deeper 

in May compared to April, which was most likely due to the warming of upper layers of the 

water column [1]. Surprisingly, only negligible portion egg strands was found shallower than 

2 m [1,2]. Egg strands were found up to the depth of 16.6 m in 2007 and up to the depth of 

20.2 m in 2008, which are the deepest records ever [2]. Perch regularly used at least 7 

different spawning substrates in 2007. While live submerged vegetation (curly pondweed 

Potamogeton crispus, Eurasian water milfoil Myriophyllum spicatum and common stonewort 

Chara vulgaris), although more abundant, was generally avoided, dead submerged vegetation 

(common reed Phragmites communis, worm weed Artemisia sp., trees and branches including 

black elder Sambucus nigra) was highly preferred [1]. In 2008 and 2009, live submerged 

vegetation almost disappeared from the lake and vast majority of egg strands was placed on 

dead submerged vegetation [2]. It appears that those large three-dimensional structures are an 

ideal spawning substrate for perch since placement of egg strands practically into the open 

water column ensures that eggs remain well oxygenated for whole 24 hours a day [1]. 

[1] Čech, M., Peterka, J., Říha, M., Jůza, T. and Kubečka, J. (2009). Distribution of egg strands of 

perch (Perca fluviatilis L.) with respect to depth and spawning substrate. Hydrobiologia 630: 105– 

114. 

[2] Čech, M., Peterka, J., Říha, M., Draštík, V., Kratochvíl, M. and Kubečka, J. (2010). Deep 

spawning of perch (Perca fluviatilis, L.) in the newly created Chabařovice Lake, Czech Republic. 

Hydrobiologia 649: 375–378. 

3.8 The stabilizing effect of resting egg banks of the Daphnia longispina species complex 

for longitudinal taxon heterogeneity in long and narrow reservoirs 

I. Vaníčková (ivana.vanickova@gmail.com), J. Seďa and A. Petrusek (Charles University, 

Prague) compared the spatial distribution of taxa from the Daphnia longispina complex 

(D. longispina, D. galeata, D. cucullata, and their hybrids) in the active water column 

community and in resting egg banks in five long narrow reservoirs in the Czech Republic 

(Central Europe). In each reservoir, both ends of the longitudinal gradient were sampled: in 

the inflow region and at the dam. Ephippia abundance in the sediments significantly increased 

in the downstream direction, reflecting differences in the sedimentation regime and Daphnia 

population size. Similarly to the active zooplankton community, in which D. cucullata and D. 

longispina tended to occur at opposite ends of the reservoirs, Daphnia species and 

interspecific hybrids in resting eggs revealed a spatially diversified pattern; however, some 

differences in taxon distributions between sediments and water columns were observed. High 

relative abundances of hybrid genotypes (up to 16% of resting eggs, and 74% of Daphnia in 

the water column) confirm that interspecific hybridization is frequent in these reservoirs, and 

some hybrids are successful in competition with the parental taxa. It is assumed that the 

spatial heterogeneity of Daphnia taxonomic composition in reservoirs, being affected by the 

25

seasonal selection of taxa within the mixed reservoir species pool, is substantially 

strengthened by the presence of spatially heterogeneous egg banks. 

3.9 Spatial heterogeneity and seasonal succession of phytoplankton along the 

longitudinal gradient in the Římov Reservoir 

In order to evaluate the effects of contrasting hydrological scenarios on the spatial and 

temporal heterogeneity of phytoplankton in a reservoir, P. Rychtecký 

(rychtecky.pavel@post.cz) and P. Znachor studied seasonal changes in various parameters 

along the longitudinal axis of the canyon-shaped, eutrophic Římov Reservoir (Czech 

Republic) at 1–2 week intervals from April to October 2007. Vertical chlorophyll and 

temperature profiles were measured and functional classification of phytoplankton was 

applied. 

Fig. 3: Temporal variation in vertical profiles of chlorophyll a (mg l –1 , obtained with a submersible 

fluorescence probe) at SITE 4 (upper panel) and DAM (lower panel) representing typical 

transition and lacustrine parts of the Římov Reservoir, respectively. Arrows indicate temporal 

dominance of a particular functional group in the phytoplankton. 

At the river inflow, phytoplankton markedly differed from the rest of the reservoir, being 

dominated by functional groups D and J (pennate diatoms and chlorococcal algae) without a 

clear seasonal pattern. From April to mid-June, groups Y and P (large cryptophytes and 

colonial diatoms) prevailed in the whole reservoir (Fig. 3). Phytoplankton spatial 

heterogeneity was most apparent during the summer, reflecting a pronounced gradient of 

environmental parameters from the river inflow to the dam (e.g., decreasing nutrients, 

increasing light availability, etc.). A dense cyanobacterial bloom (groups H1 and M) 

developed in the nutrient-rich transition zone, while functional Group N (desmids) dominated 

the phytoplankton at the same time at the dam area (Fig. 3). 

26

In late summer, a sudden flood event considerably disrupted thermal stratification, altered 

nutrient and light availability (Table 4), and later even resulted in cyanobacterial dominance 

in the whole reservoir (Fig. 3). 

Table 4: Differences in basic chemical and physical parameters before and after the flood event 

measured at DAM and SITE 4. Environmental conditions prior to the flood are characterized 

by two month averages, while one month mean values are shown for the post flood period. 

DAM SITE 4 

Before After 

Before After 

Dissolved silica (mg l –1 ) 0.88 3.72 p

all stations (Table 5). Since ACT efficiently incorporated organic substrates, the LNA 

fraction represented a highly active component of bacterial assemblages. At Stns Dam and 

Middle, the dynamics of CF also correlated with the population of CTC+ cells and an 

enhanced extracellular phytoplankton production (Table 5). 

Table 5: Pearson’s correlation coefficients between relative abundances (as percent of DAPI-stained 

cells) of Betaproteobacteria (%BET), Cytophaga-Flavobacteria (%CF), and Actinobacteria 

(%ACT) and percentages of cells with an intact membrane (%live), high nucleic acid 

content (%HNA), high respiratory activity (%CTC+), bacterial production (BP), and 

extracellular phytoplankton production (EPP). *p

4 LAKES 

4.1 Microbial loop components in the oxic/anoxic boundary in stratified lakes 

M. Macek (mirek@campus.iztacala.unam.mx) compared the autotrophic picoplankton, APP 

(epifluorescence microscopy and flow-cytometry) and ciliate, CIL (DAPI staining and 

quantitative protargol staining) distribution monitored in lake Alchichica, Mexican Plateau, 

Mexico (with Fernando Bautista, UNAM, Mexico) with the data obtained in meromictic lakes 

Waldsee, Lausitia, Germany (with Brigitte Nixdorf, Brandenburg Technical University, 

Cottbus, Germany) and Laguna de la Cruz, Cuenca, Spain (with Antonio Picazo y Antonio 

Camacho, University of Valencia, Burjassot, Valencia, Spain). Despite very big differences in 

lake limnology (alkaline, deep and warm-monomictic Alchichica vs. karstic meromictic La 

Cruz and shallow, iron meromictic Waldsee) the anoxic boundary showed a very similar 

pattern. APP were found in elevated concentrations in the oxycline of the three lakes 

(between 10 5 to 10 7 cells ml –1 ). 

We studied fine-scale stratification (0.25 m) of microaerophilic to anaerobic ciliate 

assemblages along with an estimation of the impact of grazing upon picocyanobacteria in 

Laguna de la Cruz (PCY), using fluorescently labelled bacteria (FLB) method. Scuticociliates 

dominated the environment: the genus Ctedoctema (up 130 cells ml –1 ; feeding upon PCY) 

was present within a wide range of dissolved oxygen concentrations (DO) while Uronema, 

Sathrophilus (Sphenostomella) and Cristigera strictly followed the DO gradient. Mesodinium 

sp. (up 20 cells ml –1 ), Monodinium sp. and Askenasia sp. were observed in the mixolimnion. 

The mixotrophic genera Coleps (20 cells ml –1 ) and Pelagothrix (Prorodon; up 28 cells ml –1 ) 

along with Spirostomum teres (feeding upon PCY; up 12 cells ml –1 ) biomass-dominated the 

mixolimnion and oxycline, respectively. In the anaerobic monimolimnion, the genera 

Holophrya, Caenomorpha and odontostomatids were present. Ciliates containing vacuoles 

with PCY also fed upon DTAF pre-stained Aeromonas which mimicked the natural PCY size 

distribution; however, larger cultured PCY of lake origin were not ingested. Zoochlorellabearing 

ciliates did not ingest FLB at all. Microaerophilic scuticociliates fed upon FLB even 

in the assays with untreated water samples but Spirostomum teres actively fed only in 

anaërostat assays (bubbling with helium was used to minimize DO). S. teres feeding rates 

were not linearly proportional to the incubation time. This non-linearity was in concordance 

with the observed pattern of vacuole formation: FLB had been quickly collected into very 

small vacuoles (with only 1–3 bacteria during the first 5–10 min exposition) and these small 

vacuoles then moved through the cell and finally joined large vacuoles in the posterior end of 

the cell (Fig. 4). Even though FLB ingestion dropped during the feeding experiment, FLB 

persisted in vacuoles for more than one hour. Feeding vacuoles were coloured orange (the 

colour of the PCY isolate used in experiments) with bright red fluorescence upon green 

excitation light. Combined use of PCY-photosynthesis products and digestion in the anaerobic 

conditions with an optimum light for PCY activity is hypothesized, a process similar to 

supposed oxygen- and primary production of Pelagothrix plancticola. 

In Waldsee we also found mixotrophic ciliates Pelagothrix sp. (up 6 cells ml –1 ), Euplotes 

daidaleos (5 cells ml –1 ) and Coleps sp. (37 cells ml –1 ). The hymenostomatid Dexiotricha sp. 

(25 cells ml –1 ) dominated among the APP feeding ciliates. Loxodes sp. lived in the deepanoxy 

boundary. We observed sharp changes in ciliate biomass and composition changes 

along the boundary at a vertical distance interval of 0.3 m. 

29

Fig 4: Spirostomum teres 

A– stained with DAPI, 

B– autofluorescence of APP in vacuoles, 

C– formation of a new vacuole (DTAF stained 

FLB). 

In Alchichica, we found possibly symbiotic Euplotes sp. with concentrations of up to 30 

cells ml –1 ; however, other mixotrophs were scarce. Of APP feeders, only the peritrichs 

Pelagovorticella natans and scuticociliates Cyclidium sp. were important during the 

stratification period. Significant changes occurred at a scale of metres because of important 

thermocline oscillation. Compared to the other lakes, true anaerobic ciliates were abundant 

(Caenomorpha sp. and particularly bacteria-symbiotic Cyclidim sp. and Cristigera sp.). 

Generally speaking, APP and mixotrophic ciliates were concentrated above the oxic/anoxic 

boundary. Zoochlorella-possessing ciliates (Coleps sp. and Pelagothrix sp.) were found in the 

upper layer, whereas APP-feeding, possible mixotrophic, ciliates (Euplotes sp. and 

Spirostomum teres) preferred the lower layer of the oxycline. Heterotrophic APP-feeders 

penetrated the limit of the anoxic layer but true anaerobic ciliates did not ingest APP. 

Apparently, photosynthetic active radiation (PAR) controlled the distribution along with 

dissolved oxygen. 

30

5 SPECIAL INVESTIGATIONS 

5.1 Effect of low temperature on offspring size and filtering screens morphology 

in Daphnia 

J. Macháček (machacek@hbu.cas.cz) and J. Seďa studied the seasonal variation of filtering 

setae number (FSN) in the filtering screens of D. galeata population in the Římov Reservoir. 

This morphological parameter has previously been reported to vary with feeding conditions, 

although it was found to be constant within the lifespan of an individual [1]. Therefore 

temporal variation within the population can occur either as a trans-generational phenotypic 

response or via clonal succession, as significant inter-clonal variation has been found [2]. To 

detect the temporal dynamics of FSN in the population it was necessary to analyze this 

parameter in different age groups of the population sample. Therefore FSN in zooplankton 

samples from the Římov Reservoir was investigated in three age groups of D. galeata: (1) in 

juveniles, i.e. individuals obviously of the first or preferably of the second juvenile instar, (2) 

individuals of the pre-adult and presumably in the first adult instars, (3) big adult females, 

where exact age cannot be determined. The results of this investigation (Fig. 5) indicated a 

clear tendency to produce offspring with low FSN in animals from an environment with low 

temperature and low food level (over-wintering population, deep-hypolimnion-inhabiting part 

of the population). 

70 

60 

adults 

FSN 

50 

40 

70 

ice cover 

27.1. 4.3. 11.4. 29.4. 6.5. 21.5. 13.6. 29.7. 25.8. 23.9. 14.12. 

preadults + 

primiparae 

juveniles + 

neonates 

60 

FSN 

50 

deep 

hypolimnion 

40 

27.1. 4.3. 11.4. 29.4. 6.5. 21.5. 13.6. 29.7. 25.8. 23.9. 14.12. 

Fig. 5: Seasonal dynamics of filtering setae number (FSN) in filtering screens of three age groups of 

D. galeata population in the Římov Reservoir (upper panel: majority of the population; 

lower panel: deep-hypolimnion-inhabiting part of the population). 

Laboratory experiments were then carried out to uncouple the effects of temperature and 

food level on the FSN. In the first type of experiment D. galeata adult females with fully 

developed embryos in their brood chambers were isolated from the reservoir at the end of 

January when the reservoir was covered with ice. The females (mothers) were kept in the 

laboratory in two levels of temperature and three feeding variants (Fig. 6). The FSN of 

mothers and that of their offspring in three consecutive clutches was investigated. The 

31

mothers clearly come from the autumnal population, the neonates born immediately after the 

isolation of the mothers (here referred to as 1 st offspring) had passed their oogenesis and 

embryogenesis at low temperatures in the reservoir, the 2 nd offspring passed their oogenesis in 

the reservoir and their embryogenesis in the experiment, the 3 rd offspring passed both of these 

ontogenetic phases in the experiment. The results reveal that low temperature was the main 

factor causing low FSN in neonates. 

5 ºC 

20 ºC 

FSN 

70 

60 

50 

70 

60 

50 

lake water with natural 

seston 

GF/C filtered lake 

water - high food 

GF/C filtered lake 

water - low food 

40 

mothers 

1st 

offspring 

2nd 


3rd 


40 

mothers 

1st 


2nd 


3rd 


Fig. 6: Filtering setae number (FSN) of D. galeata mothers and that of their offspring in three 

consecutive clutches. The mothers were isolated from Římov Reservoir on January 29 and 

kept in the laboratory at two temperatures and three feeding treatments (amount of the 

natural seston – 0.2 mg l –1 POC, high food and low food treatments – 2 and 0.2 mg l –1 POC 

of Scenedesmus subspicatus culture, respectively). 

The succession of ontogenetic phases and different temperature treatments during the 

experiment suggested that the time in which low temperature may induce lower FSN is very 

probably the period of embryonic development (embryogenesis). This was tested in another 

experiment, in which eggs obtained from a laboratory clone of D. galeata were incubated in 

vitro at three different levels of temperature. The eggs were removed several hours after being 

deposited in the brood pouch of the female and divided into three groups. Each group of the 

Table 6: Results of in vitro embryogenesis in D. galeata eggs incubated at three different 

temperatures (figures with different superscripts are significantly different, unequal n HSD 

tests, p=0.05). 

Temperature during embryogenesis 19°C 10°C 6°C 

Carapace length in the1st instar offspring 

(µm ± 95% C.I.) 502 (±7) a 454 (±11) b 446 (±14) b 

FSN in offspring 

(± 95% C.I.) 72 (±1) a 69 (±1) a 65 (±1) b 

same clutch was then incubated at a different temperature (19, 10, and 6°C). FSN was found 

to be significantly lower in individuals incubated during embryogenesis at the lower 

temperatures (Table 6). The difference in FSN is partly attributable to a difference in the 

body size of the neonates because the neonates from the lower temperatures were significantly 

smaller and a direct relationship between neonate size and FSN in their filtering screens was 

32

found. The results from the field, however, indicate that this relationship itself does not 

explain satisfactorily the variation in FSN. 

[1] Pop, M., 1991: Mechanisms of the filtering area adaptation in Daphnia. Hydrobiologia 225: 

169–176. 

[2] Repka, S., Veen, A., Vijverberg, J., 1999: Morphological adaptations in filtering screens of 

Daphnia galeata to food quantity and food quality. J. Plankton Res. 21: 971–989. 

5.2 Sinusoidal swimming: a searching checkmate of fishes to the transparent 

zooplankton 

M. Čech (carcharhinusleucas@yahoo.com), O. Jarolím, J. Kubečka, M. Vašek, J. Peterka 

and J. Matěna finished their extensive, 13 years research on sinusoidal swimming in fishes. 

The sinusoidal swimming (Fig. 7), previously interpreted as fish foraging behaviour [1], was 

Fig. 7: A scheme of sinusoidal swimming (one sinusoidal cycle) of reservoir open water fish, in this 

case adult common bream Abramis brama, showing tilting of fish body during the ascending 

and descending phase of sinusoidal cycle to reach an optimal attack angle when even 

transparent prey (zooplankton) is clearly visible to the predator (fish). (a) Zooplankton is 

visible against darker depths (brighter due to light scattered in their tissue). (b) Zooplankton is 

practically invisible to fish horizontally scanning eyes. (c) Zooplankton is visible against the 

bright light of the sky (darker due to absorbance at opaque parts of the body). 

33

studied with respect to season, density of large zooplankton, fish length, time of the day, 

weather condition and solar radiation in Římov Reservoir, Czech Republic, using a bottommounted, 

split-beam transducer (7 o , nominal angle; frequency 120 kHz), underwater camera, 

gillnets and purse seine. 

The proportion of sinusoidally swimming fish increased from April to August while this 

behaviour was absent in October. The occurrence of sinusoidal swimming showed an 

apparent pattern throughout the day; it increased sharply around sunrise, was highest within 

5–6 hours around solar noon and sharply decreased around sunset. Significantly less frequent 

occurrence of sinusoidal swimming was recorded during cloudy days compared to sunny 

days. The vast majority of records came from fish of standard length ranging from 100 to 400 

mm, which represents the typical size range of common bream Abramis brama and roach 

Rutilus rutilus of age >1+, the main zooplanktivores in the reservoir. The presence of these 

larger fish in the open water of the reservoir, as well as the presence of sinusoidal swimming, 

apparently correlates with the presence of large zooplankton (Daphnia, Leptodora, Cyclops 

vicinus) in the epilimnion. The increase of sinusoidal swimming between April, June and 

finally August resulted in an increase of zooplankton component in fish guts. It appears that 

high values of solar radiation, and stable calm weather during high pressure periods, result in 

optimal optical conditions for sinusoidal swimming, making this foraging behaviour more 

efficient and widely used in fishes exploiting the zooplankton production in the reservoir [2]. 

[1] Čech, M. and Kubečka, J. (2002). Sinusoidal cycling swimming pattern of reservoir fishes. Journal 

of Fish Biology 61: 456–471. 

[2] Jarolím, O., Kubečka, J., Čech, M., Vašek, M., Peterka, J. and Matěna, J. (2010). Sinusoidal 

swimming in fishes: the role of season, density of large zooplankton, fish length, time of the day, 

weather condition and solar radiation. Hydrobiologia 654: 253–265. 

5.3 Anthropogenic nitrogen emissions during the Holocene and their possible effects on 

remote ecosystems 

J. Kopáček (jkopacek@hbu.cas.cz) and M. Posch (Coordination Centre for Effects, PBL, 

Bilthoven, The Netherlands) reconstructed the emissions of reactive nitrogen (Nr = NH 3 –N + 

NO x –N) from anthropogenic sources on a global scale since ~8000 BC, using a simple model 

based on the development of human population and per capita factors of Nr emissions 

originating from livestock production, biomass burning (biofuel use, forest and savannah 

burning), and other anthropogenic sources (humans and pets, N-fertilizer use, fossil fuel 

combustion) (Fig. 8). 

The estimated global cumulative anthropogenic emissions of Nr to the atmosphere are 

~17.4 Pg N (8.6 Pg NH 3 –N and 8.8 Pg NO x –N, respectively) for 8000 BC through the year 

2000, with 28% of this amount emitted during 1850–2000, 42% during 1–1850, and 30% 

during the previous 8,000 years. Forest and savannah burning represent the major cumulative 

flux of both NH 3 –N and NO x –N (3.5 and 5.8 Pg, respectively). Livestock production and 

biofuel burning are responsible for emissions of 3.3 and 1.2 Pg NH 3 –N, respectively, while 

the application of synthetic fertilizers contributes 0.26 Pg NH 3 –N. The different duration of 

biofuel and fossil fuel use (10,000 vs. ~150 years) causes the higher cumulative NO x –N 

emissions from biofuel than fossil fuel use (1.9 vs. 1.1 Pg). The cumulative Nr emissions on a 

land-area basis are 1.3 and 2.9 Mg N ha –1 globally and in Europe, respectively. Since an 

estimated 60% of Nr emitted in Europe is also deposited there, the average cumulative 

anthropogenic Nr deposition would be ~1.8 Mg N ha –1 , representing ~30% of the current N 

34

pools in forest and alpine meadow soils of European glaciated areas (soils of similar age as 

the emissions). 

Despite large uncertainties in the model (13.7–30.5 Pg N over the last 10,000 years), the 

relative temporal distributions of total cumulative Nr emissions vary within relatively narrow 

ranges for different assumptions, with 70–84% of the emissions occurring prior to 1850. We 

conclude that the majority of the total cumulative anthropogenic Nr emission over the last 

10,000 years occurred in the pre-industrial period and could have increased soil N pools of 

some remote ecosystems much earlier than is currently assumed. 

Anthropogenic Nr emission (Tg yr -1 ). 

3000 BC 1000 1700 1913 1980 2000 

30 

25 

LIV 

FER 

20 

H&P 

AWB 

15 

FSB 

10 

FFC 

5 

0 

10000 1000 100 10 1 

Year before present 

90 

80 

70 

60 

50 

40 

30 

20 

10 

0 

3000 BC 1000 1700 1913 1980 2000 

Nr 

NH3-N 

NOx-N 

10000 1000 100 10 1 

Year before present 

Fig. 8: Global N-emissions from livestock production (LIV), application of synthetic N-fertilizers 

(FER), human excreta and domestic pets (H&P), burning of agricultural waste and biofuel 

(AWB), forest and savannah burning (FSB), fossil fuel combustion (FFC), and total emissions 

of NH 3 –N, NO x –N, and total reactive N (Nr). Time is expressed in logarithmic scale 

(1 = year 2000; numbers on top are calendar years). 

5.4 Canopy leaching of nutrients and metals in a mountain spruce forest 

J. Kopáček (jkopacek@hbu.cas.cz), J. Turek, J. Hejzlar, and P. Porcal measured element 

concentrations and fluxes in bulk precipitation (two sites) and throughfall (four sites) in 

Norway spruce mountain stands in the Bohemian Forest (Czech Republic) from 1998–2009, 

with the aim to evaluate net atmospheric inputs of nutrients to the area, and (together with 

previous data from 1991–1997) long-term trends in acidic deposition. The average net 

atmospheric inputs of nutrients were 11, 4, 9, 62, 62, 45, 26, and 0.7–1.3 mmol m –2 yr –1 for 

Ca 2+ , Mg 2+ , K + , NO 3 – , NH 4 + , total organic N, S, and total P (TP), respectively. The TP 

deposition was affected by a notable contribution from local dust and pollen sources. 

Throughfall pH increased from 3.6–3.7 in 1991–1994 to 4.7–5.0 in 2006–2009, due to 

average declines in the SO 4 2– plus NO 3 – concentrations by 202 µeq l –1 and the H + 

concentration by 147 µeq l –1 . The decline in throughfall concentrations of SO 4 2– (by 184 µeq 

l –1 ) was the dominant driving force for the pH increase. 

35

5.5 Importance of dissolved organic carbon for phytoplankton nutrition in a eutrophic 

reservoir 

This study was supported by the Grant Agency of the Czech Republic 

(Project No. 206/07/P407) 

In 2008–2009, P. Znachor (znachy@hbu.cas.cz), Jiří Nedoma, and Pavel Rychtecký 

performed in situ experiments examining the effect of glucose addition on silica deposition 

kinetics and growth rates of Fragilaria crotonensis in the eutrophic Římov Reservoir (Czech 

Republic). Silica deposition kinetics was measured at four-hour intervals over a 24-hour 

incubation period with PDMPO (2-(4-pyridyl)-5{[4-dimethylaminoethyl-aminocarbamyl)- 

methoxy] phenyl}oxazole] fluorescence probe. A significant stimulatory effect of glucose 

supplemented at the concentration of 10 –4 mol l –1 on Fragilaria silification was observed at 

time 20 and 24 hours. Fragilaria growth rates almost doubled upon glucose enrichment 

compared to the untreated control at 24 h (Fig. 9). In addition, we conducted a dose-response 

experiment testing glucose additions from 10 –8 –10 –3 mol l –1 in 24-hour incubation. Glucose 

stimulated both Fragilaria silification and growth at concentrations >10 –7 

mol l –1 (Fig. 10), which might occasionally occur in a reservoir as a result of e.g. accidental 

contamination of water by organic pollution [1]. 

Fig. 9: Kinetics of Fragilaria silification rates measured as PDMPO fluorescence at 4-hour intervals 

over 24 hours (a, c). Columns represent mean values (n ~ 50); bars are SEMs (standard errors 

of the mean). Fragilaria growth rates based on an increase in cell counts over 24 hours are 

given in the right panels (b, d). Asterisks denote significant differences between control and 

glucose amended samples (p

Fig. 10: Effect of various glucose additions on Fragilaria silification (a) and growth rates (b) 

measured after 24 hour incubation. Columns represent mean values; bars are standard errors 

of the mean. Asterisks denote significant differences between glucose-amended samples and 

untreated control (*p

6 PUBLICATIONS 

(visit www.hbu.cas.cz/papers.php for the Institute bibliography 1993–2010) 

(* authors from other institutions) 

A: Papers in International Periodicals 

1931 Adamec, L.*, Sirová, D., Vrba, J., 2010: Contrasting growth effects of prey capture 

in two aquatic carnivorous plant species. Fundamental and Applied Limnology, 176 

(2): 153–160. 

1932 Adamec, L.*, Sirová, D., Vrba, J., Rejmánková, E.*, 2010: Enzyme production in the 

traps of aquatic Utricularia species. Biologia, 65 (2): 273–278. 

1933 Blom, J.F.*, Horňák, K., Šimek, K., Pernthaler, J.*, 2010: Aggregate formation in a 

freshwater bacterial strain induced by growth state and conspecific chemical cues. 

Environmental Microbiology, 12 (9): 2486–2495. 

1934 Borovec, J., Sirová, D., Mošnerová, P., Rejmánková, E.*, Vrba, J., 2010: Spatial and 

temporal changes in phosphorus partitioning within a freshwater cyanobacterial mat 

community. Biogeochemistry, 101 (1–3): 323–333. 

1935 Čech, M., Peterka, J., Říha, M., Draštík, V., Kratochvíl, M., Kubečka, J., 2010: Deep 

spawning of perch (Perca fluviatilis, L.) in the newly created Chabařovice Lake, 

Czech Republic. Hydrobiologia, 649 (1): 375–378. 

1936 Dlouhá, Š.*, Thielsch, A.*, Kraus, R.H.S.*, Seďa, J., Schwenk, K.*, Petrusek, A.*, 

2010: Identifying hybridizing taxa within the Daphnia longispina species complex: a 

comparison of genetic methods and phenotypic approaches. Hydrobiologia, 643 (1): 

107–122. 

1937 Hahn, M.W.*, Kasalický, V., Jezbera, J., Brandt, U.*, Jezberová, J., Šimek, K., 2010: 

Limnohabitans curvus gen. nov., sp. nov., a planktonic bacterium isolated from 

freshwater lake. International Journal of Systematic and Evolutionary Microbiology, 

60 (6): 1358–1365. 

1938 Hahn, M.W.*, Kasalický, V., Jezbera, J., Brandt, U.*, Šimek, K., 2010: 

Limnohabitans australis sp. nov., isolated from a freshwater pond, and emended 

description of the genus Limnohabitans. International Journal of Systematic and 

Evolutionary Microbiology, 60 (12): 2946–2950. 

1939 Hohausová, E., Lavoy, R.J.*, Allen, M.S.*, 2010: Fish dispersal in a seasonal 

wetland: influence of anthropogenic structures. Marine and Freshwater Research, 61 

(6): 682–694. 

1940 Horňák, K., Jezbera, J., Šimek, K., 2010: Bacterial single-cell activities along the 

nutrient availability gradient in a canyon-shaped reservoir: a seasonal study. Aquatic 

Microbial Ecology, 60 (3): 215–225. 

1941 Jarolím, O., Kubečka, J., Čech, M., Vašek, M., Peterka, J., Matěna, J., 2010: 

Sinusoidal swimming in fishes: the role of season, density of large zooplankton, fish 

length, time of the day, weather condition and solar radiation. Hydrobiologia, 654 

(1): 253–265. 

38

1942 Jezberová, J., Jezbera, J., Brandt, U.*, Lindström, E.S.*, Langenheder, S.*, Hahn, 

M.W.*, 2010: Ubiquity of Polynucleobacter necessarius ssp. asymbioticus in lentic 

freshwater habitats of a heterogenous 2000 km 2 area. Environmental Microbiology, 

12 (3): 658–669. 

1943 Jůza, T., Čech, M., Kubečka, J., Vašek, M., Peterka, J., Matěna, J., 2010: The 

influence of the trawl mouth opening size and net colour on catch efficiency during 

sampling of early fish stages. Fisheries Research, 105 (3): 125–133. 

1944 Kalous, L.*, Šlechtová, V.*, Petrtýl, M.*, Kohout, J.*, Čech, M., 2010: Do small fish 

mean no voucher? Using a flatbed desktop scanner to document larval and small 

specimens before destructive analyses. Journal of Applied Ichthyology, 26 (4): 614– 

617. 

1945 Kasalický, V., Jezbera, J., Šimek, K., Hahn, M.W.*, 2010: Limnohabitans 

planktonicus sp. nov. and Limnohabitans parvus sp. nov., planktonic 

betaproteobacteria isolated from a freshwater reservoir, and emended description of 

the genus Limnohabitans. International Journal of Systematic and Evolutionary 

Microbiology, 60 (12): 2710–2714. 

1946 Kaštovský, J.*, Hauer, T.*, Mareš, J.*, Krautová, M.*, Bešta, T.*, Komárek, J.*, 

Desortová, B.*, Heteša, J.*, Hindáková, A.*, Houk, V.*, Janeček, E.*, Kopp, R.*, 

Marvan, P.*, Pumann, P.*, Skácelová, O.*, Zapomělová, E., 2010: A review of the 

alien and expansive species of freshwater cyanobacteria and algae in the Czech 

Republic. Biological Invasions, 12 (10): 3599–3625. 

1947 Komárek, J.*, Zapomělová, E., Hindák, F.*, 2010: Cronbergia gen. nov., a new 

cyanobacterial genus (Cyanophyta) with a special strategy of heterocyte formation. 

Cryptogamie, Algologie, 31 (3): 321–341. 

1948 Komárková, J., Jezberová, J., Komárek, O.*, Zapomělová, E., 2010: Variability of 

Chroococcus (Cyanobacteria) morphospecies with regard to phylogenetic 

relationships. Hydrobiologia, 639 (1): 69–83. 

1949 Kopáček, J., Cudlín, P.*, Svoboda, M.*, Chmelíková, E.*, Kaňa, J., Picek, T.*, 2010: 

Composition of Norway spruce litter and foliage in atmospherically acidified and 

nitrogen-saturated Bohemian Forest stands, Czech Republic. Boreal Environment 

Research, 15 (4): 413–426. 

1950 Kopylov, A.I.*, Kosolapov, D.B.*, Zabotkina, E.A.*, Straskrabova, V., 2010: 

Distribution of picocyanobacteria and virioplankton in mesotrophic and eutrophic 

reservoirs: The role of viruses in mortality of picocyanobacteria. Biology Bulletin, 37 

(6): 565–573. 

1951 Kratochvíl, M., Čech, M., Vašek, M., Kubečka, J., Hejzlar, J., Matěna, J., Peterka, J., 

Macháček, J., Seďa, J., 2010: Diel vertical migrations of age 0 + percids in a shallow, 

well-mixed reservoir. Journal of Limnology, 69 (2): 305–310. 

1952 Novotná, J.*, Nedbalová, L.*, Kopáček, J., Vrba, J., 2010: Cell-specific extracellular 

phosphatase activity of dinoflagellate populations in acidified mountain lakes 1 . 

Journal of Phycology, 46 (4): 635–644. 

1953 Orderud, G.I.*, Políčková-Dobiášová, B., 2010 Agriculture and the environment – A 

case study of the Želivka catchment, Czech Republic. Journal of Environmental 

Policy & Planning, 12 (2): 201–221. 

39

1954 Porcal, P., Amirbahman, A.*, Kopáček, J., Norton, S.A.*, 2010: Experimental 

photochemical release of organically bound aluminum and iron in three streams in 

Maine, USA. Environmental Monitoring and Assessment, 171 (1–4): 71–81. 

1955 Prchalová, M., Mrkvička, T., Kubečka, J., Peterka, J., Čech, M., Muška, M., 

Kratochvíl, M., Vašek, M., 2010: Fish activity as determined by gillnet catch: A 

comparison of two reservoirs of different turbidity. Fisheries Research, 102 (3): 291– 

296. 

1956 Šimek, K., Kasalický, V., Jezbera, J., Jezberová, J., Hejzlar, J., Hahn, M.W.*, 2010: 

Broad habitat range of the phylogenetically narrow R-BT065 cluster, representing a 

core group of the Betaproteobacterial genus Limnohabitans. Applied and 

Environmental Microbiology, 76 (3): 631–639. 

Correction: Applied and Environmental Microbiology, 76 (11): 3763. 

1957 Šimek, K., Kasalický, V., Horňák, K., Hahn, M.W.*, Weinbauer, M.G.*, 2010: 

Assessing niche separation among coexisting Limnohabitans strains through 

interactions with a competitor, viruses, and a bacterivore. Applied and Environmental 

Microbiology, 76 (5): 1406–1416. 

Correction: Applied and Environmental Microbiology, 76 (11): 3762. 

1958 Sirová, D., Borovec, J., Šantrůčková, H.*, Šantrůček, J.*, Vrba, J., Adamec, L.*, 

2010: Utricularia carnivory revisited: plants supply photosynthetic carbon to traps. 

Journal of Experimental Botany, 61 (1): 99–103. 

1959 Skácelová, O.*, Zapomělová, E., 2010: Remarks on the occurrence and ecology of 

several interesting cyanobacterial morphospecies found in South Moravian wetlands. 

Acta Musei Moraviae, Scientiae biologicae, 95 (1): 201–221. 

1960 Straškrábová, V., 2010: Safeguarding life in our waters. Science for Environment 

Policy, DG Environment News Alert Service, Special Issue: Water and Biodiversity, 

22: 1–2. 

1961 Tahovská, K.*, Kopáček, J., Šantrůčková, H.*, 2010: Nitrogen availability in 

Norway spruce forest floor – the effect of forest defoliation induced by bark beetle 

infestation. Boreal Environment Research, 15 (6): 553–564. 

1962 Vaníčková, I., Seďa, J., Petrusek, A.*, 2010: The stabilizing effect of resting egg 

banks of the Daphnia longispina species complex for longitudinal taxon 

heterogeneity in long and narrow reservoirs. Hydrobiologia, 643 (1): 85–95. 

1963 Zapomělová, E., Řeháková, K., Jezberová, J., Komárková, J., 2010: Polyphasic 

characterization of eight planktonic Anabaena strains (Cyanobacteria) with reference 

to the variability of 61 Anabaena populations observed in the field. Hydrobiologia, 

639 (1): 99–113. 

1964 Znachor, P., Nedoma, J., 2010: Importance of dissolved organic carbon for 

phytoplankton nutrition in a eutrophic reservoir. Journal of Plankton Research, 32 

(3): 367–376. 

40

B: International Proceedings or Monographs 

1965 Pithart, D.*, Křováková, K.*, Žaloudík, J., Dostál, T.*, Valentová, J.*, Valenta, P.*, 

Weyskrabová, J.*, Dušek, J.*: 2010: Ecosystem services of natural floodplain segment 

- Lužnice River, Czech Republic. In: Proverbs, D., de Wrachien, D., Brebbia, C., 

Mambretti, S. (eds.), Flood Recovery, Innovation and Response II, WIT Press, ISBN 

978–1–84564–444–4: 129–139. 

1966 Wright, R.F.*, Aherne, J.*, Bishop, K.*, Dillon, P.J.*, Erlandsson, M.*, Evans, C.D.*, 

Forsius, M.*, Hardekopf, D.W.*, Helliwell, R.C.*, Hruška, J.*, Hutchins, M.*, Kaste, 

O*., Kopáček, J., Krám, P.*, Laudon, H.*, Moldan, F.*, Rogora, M.*, Sjoeng, 

A.M.S.*, de Wit, H.A.*, 2010: Interaction of Climate Change and Acid Deposition. In: 

Kernan, M., Battarbee, R.W., Moss, B. (eds.) Climate Change Impacts on Freshwater 

Ecosystems, Blackwell Publishing Ltd., ISBN 978–1–4051–7913–3: 152–179. 

C: Papers and Books in Czech 

1967 Borovec, J., Hejzlar, J., Jan, J., Mošnerová, P., 2010: Eutrofizační potenciál různých 

zdrojů fosforu v povodí VN Římov [Eutrophication potential of different sources of 

phosphorus in the Římov Reservoir catchment]. In: Borovec, J., Očásková, I. (eds.) 

Sborník příspěvků Revitalizace Orlické nádrže 2010, 3. ročník odborné konference. 

Písek, October 12–13, 2010, Svazek obcí regionu Písecko a BC AV ČR, v.v.i., 

Hydrobiologický ústav, Č. Budějovice, ISBN 978–80–254–9014–3: pp. 47–52. 

1968 Hejzlar, J., Borovec, J., Mošnerová, P., Polívka, J., Turek, J., Volková, A., Žaloudík, 

J., 2010: Bilanční studie zdrojů živin v povodí nádrže Orlík: 1. principy, metodika, 

výsledky [A mass balance study of nutrient sources in the catchment of Orlík 

Reservoir: 1. Principles, methods, results]. In: Borovec, J., Očásková, I. (eds.) Sborník 

příspěvků Revitalizace Orlické nádrže 2010, 3. ročník odborné konference. Písek, 

October 12–13, 2010, Svazek obcí regionu Písecko a BC AV ČR, v.v.i., 


1969 Hejzlar, J., Borovec, J., Polívka, J., Turek, J., Volková, A., 2010: Bilanční studie 

zdrojů živin v povodí nádrže Orlík: 2. scénářová analýza pro návrh strategie snižování 

odnosu fosforu [A mass balance study of nutrient sources in the catchment of Orlík 

Reservoir: 2. Scenario analysis for proposal of strategy to decrease phosphorus 

runoff]. In: Borovec, J., Očásková, I. (eds.) Sborník příspěvků Revitalizace Orlické 

nádrže 2010, 3. ročník odborné konference. Písek, October 12–13, 2010, Svazek obcí 

regionu Písecko a BC AV ČR, v.v.i., Hydrobiologický ústav, Č. Budějovice, ISBN 

978–80–254–9014–3: pp. 67–80. 

1970 Hejzlar, J., Borovec, J., Jan, J., Kopáček, J., Mošnerová, P., Potužák, J.*, Rohlík, V.*, 

Žaloudík, J., 2010: Příčiny eutrofizace a zhoršování jakosti vody ve vodárenské nádrži 

Karhov: vnitřní zatížení nebo procesy v povodí? [Sources of eutrophication and water 

quality decline in the drinking water reservoir Karhov: Internal loading or catchment 

processes?]. In: Říhová Ambrožová J. (ed.) Sborník konference Vodárenská biologie 

2010, Praha, February 3–4, 2010. Vodní zdroje EKOMONITOR, spol. s r.o., Chrudim, 

ISBN 978–80–86832–48–7: pp. 114–122. 

41

1971 Jan, J., Borovec, J., Hejzlar, J., 2010: Zpřesnění interpretace frakcionační analýzy P, 

Fe a Al v sedimentech [Sediment P, Fe, and Al fractionation analysis – interpretation 

improvement]. In: Kalousková, N., Dolejš, P. (eds.) Sborník konference Pitná voda, 

10. pokračování konferencí Pitná voda z údolních nádrží. Tábor, May 17–20, 2010, W 

& ET Team, Č. Budějovice, ISBN 978–80–254–6854–8: pp. 323–328. 

1972 Krása, J.*, Dostál, T.*, Rosendorf, P.*, Hejzlar, J., Borovec, J., Duras, J.*, Fiala, D.*, 

Beránková, T.*, Dvořáková, T.*, Martinec, J.*, Strouhal, L.*, Koudelka, P.*, 

Mikšíková, K.*, Vrána, K.*, Ansorge, L.*, 2010: Útvary stojatých vod v ČR a rizika 

eutrofizace způsobená erozním smyvem [Defining of eutrophication of standing water 

bodies caused by erosion phosphorus loads]. In: Sborník příspěvků z konference 

Krajinné inženýrství 2010, Praha, September 23–24, 2010. ČSKI, Praha, ISBN 978– 

80–903258–9–0: pp. 56–62. 

1973 Krolová, M., Čížková, H.*, Hejzlar, J., 2010: Faktory ovlivňující výskyt vodních 

makrofyt v nádrži Lipno [Factors effecting the occurrence of aquatic macrophytes in 

the Lipno reservoir]. Silva Gabreta, 16 (2): 61–92. 

1974 Kubečka, J., Boukal, D.*, Matěna, J., Soukalová, K., Říha, M., 2010: Mořský a 

sladkovodní svět se střetly na jihu Čech [Marine and freshwater worlds met in South 

Bohemia]. Akademický bulletin, 2010 (12): 22–23. 

1975 Kubečka, J., Frouzová, J., Jůza, T., Kratochvíl, M., Prchalová, M., Říha, M., 2010: 

Metodika monitorování rybích společenstev nádrží a jezer [Methodical guideline for 

the monitoring of fish communities of lakes and reservoirs]. Biologické centrum AV 

ČR, v.v.i., Hydrobiologický ústav, Č. Budějovice, ISBN 978–80–86668–08–6: 64 pp. 

1976 Kubečka, J., Matěna, J., Čech, M., Kratochvíl, M., Peterka, J., Prchalová, M., Říha, 

M., Vašek, M., 2010: Inventura ryb v našich vodách [Fish census in Czech waters]. 

Rybářství, 2010 (2): 42–45. 

1977 Kubečka, J., Matěna, J., Čech, M., Draštík, J., Frouzová, J., Jůza, T., Kratochvíl, M., 

Muška, M., Peterka, J., Prchalová, M., Říha, M., Tušer, M., Vašek, M., 2010: Thor 

Heyerdahl zamířil do sladkých vod [Thor Heyerdahl arrived into fresh waters]. 

Rybářství, 2010 (7): 14–17. 

1978 Peterka, J., Kubečka, J., Čech, M., Draštík, V., Frouzová, J., Jůza, T., Prchalová, M., 

Říha M., 2010: Ryby důlních jezer – nedílná součást funkčního ekosystému [Fish in 

the coal-mine pit lakes – integral component of a functional ecosystem]. In: Sborník 

Magdeburský seminář o ochraně vod 2010, Teplice, October 4–6, 2010, Povodí Ohře, 

s.p., Chomutov: pp. 106–109. 

1979 Potužák, J.*, Duras, J.*, Borovec, J., Rohlík, V.*, Langhansová, M.*, Kubelka, A.*, 

2010: První výsledky živinové bilance rybníku Rožmberk s posouzením vlivu na řeku 

Lužnici [First results of the fish pond Rozumberk nutrient mass-balance with 

considering of the influence on Luznice river]. In: Borovec, J., Očásková, I. (eds.) 

Sborník příspěvků Revitalizace Orlické nádrže 2010, 3. ročník odborné konference. 

Písek, October 12–13, 2010, Svazek obcí regionu Písecko a BC AV ČR, v.v.i., 


42

1980 Potužák, J.*, Duras, J.*, Borovec, J., Rucki, J.*, 2010: Rybníky Dehtář a Hejtman – 

látkové bilance [Fish ponds Dehtar and Hejtman – mass-balances]. In: Borovec, J., 

Očásková, I. (eds.) Sborník příspěvků Revitalizace Orlické nádrže 2010, 3. ročník 

odborné konference. Písek, October 12–13, 2010, Svazek obcí regionu Písecko a BC 

AV ČR, v.v.i., Hydrobiologický ústav, Č. Budějovice, ISBN 978–80–254–9014–3: pp. 

119–136. 

1981 Šantrůčková, H.*, Vrba, J., Křenová, Z.*, Svoboda, M.*, Benčoková, A.*, Edwards, 

M.*, Fuchs, R.*, Hais, M.*, Hruška, J.*, Kopáček, J., Matějka, K.*, Rusek, J.*, 2010: 

Co vyprávějí šumavské smrčiny. Průvodce lesními ekosystémy Šumavy [What the 

spruce forests of the Šumava Mts. tell us. A quide to Šumava’s forest ecosystems]. 

Správa NP a CHKO Šumava, ISBN 978–80–87257–04–3: 153 pp. 

43

Biology Centre of the Academy of Sciences of the Czech Republic, v.v.i. 

INSTITUTE OF HYDROBIOLOGY 

51 th ANNUAL REPORT 

For the Year 2010 

ISSN 1210 – 9649 

44 pages + Appendix (8pp) 

Edited by Jiří Nedoma 

Assistant Editors: N. Johanisová (language revision), V. Lavičková 

Published by Biology Centre of the Academy of Sciences of the Czech Republic, v.v.i., Institute of 

Hydrobiology, České Budějovice (founded 1955 as Hydrobiological Laboratory, Czechoslovak 

Academy of Sciences, Prague) 

Printed in Czech Republic by Typodesign, České Budějovice 

© Biology Centre AS CR, v.v.i, Institute of Hydrobiology, 2011 

44

APPENDIX 

Jaroslav Hrbáček (1921–2010): The complete bibliography 

A: International Periodicals 

Hrbáček, J., Brandl, Z., Straškraba, M.*, 2003: Do the long-term changes in zooplankton 

biomass indicate changes in fish stock? Hydrobiologia, 504 (Special Issue): 203–213. 

Straškrabová, V., Brandl, Z., Hrbáček, J., Komárková, J., Seďa, J., Straškraba, M., Šimek, K., 

1998: Long-term changes of bacteria, phytoplankton and zooplankton: temporal coherence 

between deep stratified reservoirs. Internat. Rev. Hydrobiol., 83 (Special Issue): 21-30. 

Hrbáček, J., Albertová, O., Desortová, B., Gottwaldová, V., Komárková, J., Kopáček, J., 

Popovský, J., Seďa, J., Vyhnálek, V., 1994: Overshooting phenomenon of chlorophyll-a 

concentrations and the year-to-year variation of the fish impact on zooplankton. Arch. 

Hydrobiologie, Beih. Ergebn. Limnol., 40: 175-184. 

Brandl, Z., Hrbáček, J., Komárková, J., Vyhnálek, V., Seďa, J., Straškraba, M., 1989: 

Seasonal changes of zooplankton and phytoplankton and their mutual relations in some 

Czechoslovak reservoirs. Arch. Hydrobiologie, Beih. Ergebn. Limnol., 33: 597-609. 

Hebert, P.D.N., Schwartz, S.S., Hrbáček, J., 1989: Patterns of genotypic diversity in 

Czechoslovakian Daphnia. Heredity, 62: 207-216. 

Hrbáček, J., 1987: Systematics and biogeography of Daphnia species. In: Peters, R.H., de 

Bernardi, R. (Eds.): „Daphnia“. Mem. Ist. Ital. Idrobiol., 45: 31-35. 

Hrbáček, J., 1987: Systematics and biogeography of Daphnia species in the northern 

temperate region. In: Peters, R.H., de Bernardi, R. (Eds.): „Daphnia“. Mem. Ist. Ital. 

Idrobiol., 45: 37-76. 

Hrbáček, J., Albertová, O., Desortová, B., Gottwaldová, V., Popovský, J., 1986: Relation of 

the zooplankton biomass and share of large cladocerans to the concentrations of total 

phosphorus, chlorophyll-a and transparency in Hubenov and Vrchlice reservoirs. 

Limnologica, 17: 301-308. 

Hrbáčková, M., Hrbáček, J., 1979: Rate of the postembryonic development in several 

populations of the group of the species Daphnia hyalina Leyding at various concentrations 

of food. Věstník Čs. spol. zool., 43, 4: 253-259. 

Hrbáčková, M., Hrbáček, J., 1978: The growth rate of Daphnia pulex and Daphnia pulicaria 

(Crustacea: Cladocera) at different food levels. Věstník Čs. spol. zool., 42, 2: 81-84. 

Hrbáček, J., Desortová, B., Komárková, J., Popovský, J., 1977: Observations on the relation 

between phosphorus and chlorophyll in small reservoir Klíčava, Bohemia. Int. J. Ecol. 

Environ. Sci., 3: 9-15. 

Hrbáček, J., 1976: Relations between nutrient budget and productivity in ponds. Limnologica, 

10, 2: 353-355. 

Uhlmann, D., Hrbáček, J., 1976: Kriterien der Eutrophie stehender Gewässer. Limnologica, 

10, 2: 245-253. 

Hrbáček, J., 1974: On the possibilities of averaging the seasonal pattern in Kjeldahl nitrogen 

in a group of water bodies. Int. Rev. ges. Hydrobiol. 38, 3: 395-402. 

Hrbáček, J., 1969: Redescription of Daphnia zschokkei Stingelin. Věstník Čs. spol. zool. 33, 

2: 128-131. 

45

Hrbáček, J., 1965: Beziehungen zwischen Nährstoffgehalt, Organismenproduktion und 

Wasserqualität in Talsperren. Wissenschaftliche Zeitschrift der Karl-Marx-Universität 

Leipzig 14: 265-273. 

Hrbáček, J., Novotná-Dvořáková, M., 1965: Plankton of four Backwaters related to their size 

and fish stock. Rozpravy ČSAV, Řada matem. a přír. věd 75, 13: 1-65. 

Hrbáček, J., 1962: Species composition and the amount of the zooplankton in relation to the 

fish stock. Rozpravy ČSAV 72, 10: 116 pp. 

Hrbáček, J., Hrbáčková -Esslová, M., 1960: Fish stock as a protective agent in the occurrence 

of slow-developing dwarf species and strains of the genus Daphnia. Int. Rev. ges. 

Hydrobiol. 45, 3: 355-358. 

Hrbáček, J., 1959: Circulation of water as a main factor influencing the development of 

helmets in Daphnia cucullata Sars. Hydrobiologia, 13: 170-185. 

Hrbáček, J., 1959: Über die angebliche Variabilität von Daphnia pulex L. Zool. Anzeiger, 

162: 116-126. 

Hrbáček, J., 1950: On the flight reaction of tadpoles of the common toad caused by chemical 

substances. Experientia VI, 3: 100-104. Basel. 

Hrbáček, J., 1950: On the morphology and function of the antennae of the Central European 

Hydrophilidae (Coleoptera). The Transactions of the Royal Entomol. Soc. of London 

101,7: 239-256. London 

Hrbáček, J., 1949: Morphology and physiology of the spiracles of the family Hydrophylidae. 

Věstník čsl. zool. spol. 13: 136-176. 

B: International Proceedings or Monographs 

Pechar, L., Hrbáček, J., Pithart, D., Dvořák, J., 1996: Ecology of pools in the floodplain. In: 

Prach, K., Jeník, J., Large, A.R.G. (eds.), Floodplain Ecology and Management, pp. 209- 

226. SPB Academic Publishing, Amsterdam. 

Absolon, K., Bejček, K., Černý, R., Hartwich, P., Hrbáček, J., Husák, Š., Janda, J., 

Klabouchová, A., Klimeš, L., Komárek, O., Král, D., Pechar, L., Pithart, D., Poulíčková, 

A., Prach, K., Rektoris, L., Svobodová, J., Ševčík, J., Šťastný, K., Wolowski, K., 1996: 

Appendix. In: Prach, K., Jeník, J., Large, A.R.G. (eds.), Floodplain Ecology and 

Management, pp. 271-282. SPB Academic Publishing, Amsterdam. 

Straškrabová, V., Brandl, Z., Hejzlar, J., Hrbáček, J., Komárková, J., Procházková, L., 

Straškraba, M., 1996: Einwirkung der Moldauer Kaskade auf die Wasserbeschaffenheit 

und Produktionsfähigkeiten des Flussökosystems. In: 7. Magdeburger Seminar für 

Gewässerschutz des Ökosystems der Elbe, pp. 130-136. České Budějovice, October 22-25, 

1996, GKSS Forschungszentrum, VÚV TGM. 

Hrbáček, J., 1994: Food web relations. In: Eiseltová, M. (ed.) Restoration of Lake Ecosystems 

a holistic approach. pp.44-58. International Waterfowl and Wetlands Research Bureau. 

Hrbáček, J., Pechar, J., Dufková, V., 1994: Anaerobic conditions in winter shape the seasonal 

conditions of Copepoda and Cladocera in pools in forested inundations. Verhandlungen 

Internat. Verein. Limnol. 25: 1335-1336. 

Hrbáček, J., 1984: Ecosystems of European man-made lakes. In: Taub, B.F. (ed): Lakes and 

Reservoirs, pp. 267-290. Elsevier Sci. Publ., Amsterdam. 

Hrbáček, J., 1981: Investigation of freshwater biota. In: Handbook of contemporary 

developments in world ecology: 136-138. Westport, Greenwood Press. 

46

Hrbáček, J., 1981: Possibilities of bioindications of trophic conditions in reservoirs. In: 

Společenský význam zoologických výskumov při tvorbe a ochrane životného prostredia: 

25-29. Zborník materiálov z celoštát. zool. konferencie Bratislava. Slov. zool. spol. při 

SAV. 

Hrbáček, J., Hrbáčková, M., 1980: Planktonic species of Cladocera (Crustacea) as biological 

indicators of eutrophication. In: Bioindicatores deteriorisationis regionis: 49-54. Proc. 3 rd 

Internat. Confer. Liblice 1977. Praha, Academia 1980. 

Fott, J., Desortová, B., Hrbáček, J., 1980: A comparison of the growth of flagellates under 

heavy grazing stress with a continuous culture. In: Contin. Cultiv. Microorganisms: 395- 

401. Proc. 7 th Symp. Prague 1978. Praha, Inst. Microbiol. Czechoslvak Acad. Sci. 1980. 

Hrbáček, J., Desortová, B., Popovský, J., 1978: Influence of the fishstock on the phosphoruschlorophyll 

ratio. Verh. Internat. Verein. Limnol. 20, 3: 1624-1628. 

Hrbáček, J., Kořínek, V., Frey, D.G., 1978: Cladocera. In: Illies, J. (ed.): Limnofauna 

Europaea: 189-195. G. Fischer Vrlg., Stuttgart. 

Hrbáček, J., 1977: Competition and predation in relation to species composition of freshwater 

zooplankton, mainly Cladocera. In: Cairs, J. jr. (ed.): Aquatic microbial communities. 

Garland Reference Library of Science and Technology, vol. 15: 305-353. New York. 

Hrbáček, J., Procházková, L., 1975: Release of nitrogenous substances from bottom 

sediments under laboratory conditions. Verh. Internat. Verein. Limnol., 19: 1899-1906. 

Hrbáček, J., 1973: Relations between nutrient budget and productivity in ponds. In: 

Eutrophierung u. Gew. Symposium Biol. Gesellschaft DDR u. Techn. Univ. Dresden, 

Reinhardsbrunn: 59-62. 

Hrbáček, J., 1971: Special sampling systems. Secondary productivity in fresh waters. A 

manual on methods. IBP Handbook 17: 15-16. 

Hrbáček, J., 1970: Problems and results of productivity studies in ponds and reservoirs. 

Preliminary papers for UNESCO-IBP Symposium on productivity problems of 

freshwaters. I: 155-157. Kazimierz Dolny, Poland 

Hrbáček, J., 1969: Relations between some environmental parameters and the fish yield as a 

basis for a predictive model. Verh. Internat. Verein. Limnol., 17: 1069-1081. 

Hrbáček, J., 1969: Relation of productivity phenomena to the water quality criteria in ponds 

and reservoirs. In: Advances in water pollution research. Proceedings of the 4 th Internat. 

Confer. Prague 1969: Pergamon Press, Oxford. 

Hrbáček, J., 1969: On the possibility of estimating predation pressure and nutrition level of 

populations of Daphnia /Crust., Cladocera/ from their remains in sediments. Mitt. Internat. 

Verein. Limnol., 17: 269-274. 

Hrbáček, J., 1969: Relations of biological productivity to fish production and the maintenance 

of water quality. In: Proc. of the Symposium: Man made lakes, Accra 1966. Ghana Univ. 

Press, Accra 1969: 176-185. 

Hrbáček, J., 1969: Water passage and distribution of plankton organisms in Slapy Reservoir. 

In: Proc. of the Symposium: Man made lakes, Accra 1966, Ghana Univ. Press, Accra 

1969: 144-154. 

Hrbáček, J., 1968: In Erinnerung an Dr. Emil Dejdar. Věstník Čsl. spol. zool. 32, 1: 95-96. 

Hrbáček, J., 1967: On some quantitative relationships between nitrogen and phosphorous 

compounds in water and seston. Proc. IBP Symposium: 106-114, Amsterdam. 

Hrbáček, J., Straškraba, M., Kořínek, V., 1967: Cladocera. In: Limnofauna Europea. G. 

Fischer Verlag, Stuttgart, 202-209. 

47

Hrbáček, J., Hrbáčková-Esslová, M., 1966: The taxonomy of the genus Daphnia and the 

problem of “biological indication“. Verh. Internat. Verein. Limnol., 16, 3: 1661-1667. 

Hrbáček, J., Straškraba, M., 1966: Horizontal and vertical distribution of temperature, 

oxygen, pH and water movements in Slapy Reservoir /1958-1960/. Hydrobiol. Studies, 1: 

7-40. 

Straškraba, M., Hrbáček, J., 1966: Net-plankton cycle in Slapy Reservoir during 1958-1960. 

Hydrobiol. Studies 1: 113-153. 

Hrbáček, J., Procházková, L., Straškrabová, V., Junge, C.O., 1966: The relationship between 

the chemical characteristics of the Vltava River and Slapy Reservoir with an appendix: 

Chemical budget for Slapy Reservoir. Hydrobiol. Studies 1: 41-84. 

Hrbáček, J., 1966: A morphometrical study of some backwaters and fish ponds in relation to 

the representative plankton samples. Hydrobiol. Studies 1: 221-265. 

Hrbáček, J., 1965: Relations of planktonic crustacea to different aspects of pollution. In: Biol. 

problems in water pollution, 3 rd Seminar held at Cincinnati 13-17 Aug. 1962, 53-57. 

Hrbáček, J., 1964: Contribution to the ecology of water-bloom-forming blue-green algae – 

Aphanizomenon flos-aquae and Microcystis aeruginosa. Verh. Internat. Verein. Limnol., 

XV: 837-846 

Hrbáček, J., Popovský, J., 1963: Determination of phosphate and total phosphorus in water. 

Symposium 1963 on secondary production – Slapy. 

Hrbáček, J., 1962: Species composition and the amount of the zooplankton in relation to the 

fish stock. Rozpravy ČSAV 72, 10: 116pp. Praha, Academia. 

Hrbáček, J., Dvořáková, M., Kořínek, V., Procházková, L, 1961: Demonstration of the effect 

of the fish stock on the species composition of zooplankton and the intensity of metabolism 

of the whole plankton association. Verh. Internat. Verein. Limnol., XIV: 192-195. 

Hrbáček, J., 1958: Density of the fish population as a factor influencing the distribution and 

speciation of the species in the genus Daphnia. Proc. 15 th International Congress of 

Biology, Sect. 10, London, pp. 794-795. 

Hrbáček, J., 1958: Typologie and Produktivität der teichartigen Gewässer. Verh. Internat. 

Verein. Limnol. XIII: 394-399. 

C: Papers and books in Czech 

Hrbáček, J., 2005: Dlouhodobější důsledky povodně 2002 pro biocenosu volné vody Slapské 

nádrže. [Long-term effects of the 2002 flood for the biocenosis of the open water of the 

Slapy reservoir]. In: Ambrožová, J., Tlustá , P (eds), Sborník conference Vodárenská 

biologie 2005, , Praha, February 2–3, 2005, Vodní zdroje Ekomonitor, Chrudim, pp. 203– 

208. ISBN 80–86832–07–4:pp.180-186. 

Hrbáček, J., 2003: Jak ovlivnil silný průtok plankton Slapské nádrže? [The effect of a high 

through-flow on the plankton of the Slapy reservoir]. In: Ambrožová, J. (ed.), 19. seminář 

Aktuální otázky vodárenské biologie, Praha, February 5–6, 2003, Vodní zdroje 

Ekomonitor, Chrudim, pp. 203–208. ISBN 80–903203–1–7. 

Hrbáček, J., Brandl, Z., 2003: Co ovlivňuje život planktonu v údolních nádržích? [Effects on 

planktonic life in valley reservoirs?]. Acta Facultatis Ecologiae: 10 (Suppl. 1): 123–126. 

Hrbáček, J., 2002: Co je příčinou vymizení vodního květu z hladiny Slapské nádrže? [The 

possible reasons for the disappearance of water-bloom from the surface of Slapy reservoir.] 

In: Ambrožová, J. (ed.), 18. seminář Aktuální otázky vodárenské biologie, Praha, February 

6-7, 2002, VŠCHT, Praha, pp. 146-150. ISBN 80-7080-467-X. 

48

Hrbáček, J., 2000: Vztah změn podílu perlooček >0.7 mm v jejich celkové biomase k změně 

koncentrace chlorofylu, biomasy a druhovému složení fytoplanktonu. [Relation between 

changes of the proportion of Cladocera >0.7 mm in total cladoceran biomass to changes in 

chlorophyll concentration, phytoplankton biovolume and species composition.] In: Rulík, 

M. (ed.), Sborník referátů XII. Limnologická konference Limnologie napřelomu tisíciletí, 

Kouty nad Desnou, September 18-22, 2000, Univerzita Palackého, Olomouc, pp.111-114. 

Hrbáček, J., 2000: Zooplankton v pelagiálu a zarostlém litorálu tůně s rybím potěrem. 

[Zooplankton in the pelagial and weed overgrown littoral of the backwater with fish fry.] 

In: Pithart, D. (ed.), Sborník příspěvků z konference Ekologie aluviálních tůní a říčních 

ramen, Lužnice u Třeboně, March 2-3, 2000, Botanický ústav AV ČR, Průhonice, pp. 85- 

86. 

Hrbáček, J., 2000: Dvě strategie v ekosystému astojatých vod. [Two strategies in a lenitic 

ecosystem.] In: Pithart, D. (ed.), Sborník příspěvků z konference Ekologie aluviálních tůní 

a říčních ramen, Lužnice u Třeboně, March 2-3, 2000, Botanický ústav AV ČR, Průhonice, 

pp. 13-15. 

Hrbáček, J., 2000: Sezónní interakce perlooček a klanonožců v tůních řeky Lužnice. 

[Seasonal interactions of cladocerans and copepods in Lužnice backwaters.] In: Pithart, D. 

(ed.), Sborník příspěvků z konference Ekologie aluviálních tůní a říčních ramen, Lužnice u 

Třeboně, March 2-3, 2000, Botanický ústav AV ČR, Průhonice, pp. 87-88. 

Hrbáček, J., 1991: Ekologie planktonu v ekosystému stojatých vod. [Plankton ecology in the 

ecosystem of standing waters.] In: Sborník IX. celostátní konference ČSLS, pp. 61-64, 

September 24-27, Znojmo, ČSAV. 

Hrbáček, J., Hrbáčková, M., 1985: Mechanismy koexistence dvou druhů perlooček rodu 

Daphnia na stejém biotopu. [Mechanisms of coexistence of two Daphnia species in the 

same habitats.] In: 7. konferencia Československej limnologickej spoločnosti, pp.3348- 

340, June 17-21, 1985, Nitra, Dom techniky. 

Hrbáček, J., Desortová, B., Albertová, O., Gottwaldová, V., Popovský, 1984: Vztah biomasy 

zooplanktonu a podílu velkých perlooček ke koncentraci celkového fosforu, chlorofylu a 

průhlednosti nádrží Hubenov a Vrchlice. [Relation of zooplankton biomass and proportion 

of large cladocerans to total phosphorus and chlorophyll concentrations and to water 

transparency in the Hubenov and Vrchlice reservoirs.] In: Straškraba, M., Porcalová, P., 

Brandl, Z. (eds), Hydrobiologie a kvalita vody údolních nádrží, pp.233-240, February 6-9, 

1984, VTS JIVAK, PŘ and VTS JČBC. 

Kuklík, K., Hrbáček, J., 1984: České a moravské rybníky. Praha, ČTK Pressfoto, 83p. 

Hrbáček, J., 1984: Ryby zjišťují koncentrace znečisťujících látek. Vesmír 63, 10: 317. 

Hrbáček, J., 1982: Začátky výzkumu vlivu ryb na strukturu společenstva stojatých vod, 

předevěím na strukturu planktonu. In: Věda v Československu 1945-1960. Praha, Ústav 

československých a světových dějin, ČSAV. 

Hrbáček, J., Albertová, O., Popovský, J., 1982: Trofie, eutrofizace a jakost vody. In: „Vodní 

ekosystémy, funkce, vývoj a ochrana, 196-201. Sborník referátů 6. konference ČLS 27.9. – 

1.10. 1982, Blansko. Ostrava SmVAK a pobočka ČSVTS. 

Hrbáček, J., 1982: Dusičnany v povrchových a podzemních vodách. Vodohosp. – techn. ekon. 

informace 1982, 5: 166-171. 

Hrbáček, J., 1981: Produkční vztahy, výchozí struktura pro posuzování faktorů eutrofizace 

údolních nádrží. Studie ČSAV 24: 58p. Praha, Academia. 

Hrbáček, J., 1981: Nevyužití mořští korýši. Vesmír 60, 11: 348. 

49

Hrbáček, J., 1980: Znečisťování vody a jeho vliv na organismy. (Třídy čistoty vody a 

biologické indikátory). In: J. Poupě (ed), Čistota vody a regulace toků p.11-16. Praha, 

Český rybářský svaz. 

Hrbáček, J., 1980: Zelený hrášek a kovy v organických hnojivech. Vesmír 59, 2: 60. 

Hrbáček, J., 1979: Vliv zvyšování aplikace průmyslových hnojiv v zemědělství na zvyšování 

koncentrace sloučenin dusíku a fosforu v povrchových vodách. In: Kvalita vody a 

rybářství. Sborník referátů y celostatní konf. Vodňany 1979: 53-58. Vodňany ČSVTS, 

Ústřední rybářská sekce. 

Hrbáček, J., Popovský, J., 1979: Průběh koncentrace sloučenin fosforu v hladinové vrstvě 

Klíčavské údolní nádrže za 17 let. In: Problematika priehradných nádrží, najmä 

vodárenských: 7. Symposium Banská Bystrica 1979. Čsl. priehradný výbor pri ČSVTS, 

Bratislava, Výsk. úst. vodného hospodárstva. 

Hrbáček, J., 1979: Homeostase v pelagických společenstvech, případně ekosystémech 

sladkých vod. In: Poznávání, řízení a ochrana jakosti vody. Sborník referátů V. 

limnologické konf. Ústí n.l.: 81-88. Pardubice, Dům techniky ČSVTS. 

Hrbáček, J., 1978: Limnologické podklady pro posuzování vhodnosti účelové rybí osádky ve 

vodárenských údolních nádržích. Vertebratologické zprávy 1978: 1-18. 

Hrbáček, J., 1978: Získávání ebergie z vertikálních teplotních rozdílů v moři. Vesmír 57, 4: 

125. 

Hrbáček, J., Desortová, B., Popovský, J., Gottwaldová, V., 1977: Snížení rozvoje řas ve 

vodárenské nádrži Hubenov biocenotickými prostředky. In: Voda. Moderní technoilogické 

metody úpravy vody. IV. vodárenská konference Gottwaldov 1977: 98-106. Dům techniky, 

Pardubice. 

Albertová, O., Hrbáček, J., Popovská, P., Popovský, J., Punčochář, P., 1977: Neobvyklý 

výskyt vajíček vodulí ve vodárenské nádrži Hubenov. Živa 43, 4: 143-145. 

Hrbáček, J., 1977: Vitamin C snižuje toxicitu toxafenu pro ryby. Vesmír 56, 9: 283. 

Hrbáček, J., 1977: Využitie niektorých limnologických poznatkov na zníženie eutrofizácie 

v ůdolných nádržíach. In: Biologické problémy vodného hospodárstva, IV. závodná 

pobočka SVTS PBH Košice 1977: 220-232. 

Hrbáček, J., 1977: Repelent proti žralokům. Vesmír 56,4: 122. 

Albertová, O., Hrbáček, J., Vostradovský, J., 1976: Příspěvek poznání vývoje poměrů ve 

vodárenské nádrži Hubenov. In: Oborové dny nové techniky ve vodním hospodířství, 

Povodí Moravy Brno: 48-56. 

Samek, V., Hrbáček, J., 1976: Les a čistota vod. Lesnické práce 55, 8: 336. 

Hrbáček, J., 1976: Vztah ekológie k ostatným vešdným odvetviam a výuka ekológie. Biológia 

1: 137-139. 

Hrbáček, J., 1976: Dieldrin ve vodních organismech. Vesmír 55,8: 251. 

Hrbáček, J., Brtek, J., Vranovský, M., Štěrba, O., 1975: Zooplankton a význační zástupcovia 

niektorých skupín drobného vodného živočišstva tatranských plies. TANAP - Zborní prác 

o Tatranskom národnom parku 16: 105-109. 

Hrbáček, J., Procházková, L., Straškraba, M., 1975: Zintenzivnění zemědělské výroby a 

dusičnany. Vesmír 54m,8: 238-241. 

Ertl, M., Hrbáček, J., Lellák, J., 1974: Ekologie některých skupin vodních živočichů. Zprávy 

Čs. zool. spol. 4-6: 27-33. 

50

Hrbáček, J., 1974: Vliv hnojení zemědělské půdy na obsah sloučenin dusíku a fosforu v 

povrchových vodách. Acta Universitatis Palackianae Olomoucensis, Fac. Rerum 

Naturarum, Biologica XV, 47: 117-121. 

Hrbáček, J., 1973: Rtuť a biosféra. Vesmír 52,1: 26. 

Hrbáček, J., Straškraba, M., 1973: Vliv přečerpávacích vodních elektráren na kvalitu vody a 

jiné využívání údolních nádrží. Přehradní dny Ostrava, sborník referátů: 52-61. ČSVTS, 

Čs, přehradní výbor. 

Hrbáček, J., 1972: Těžba nafty ze dna moří a rybářství. Vesmír 51, 3: 93. 

Hrbáček, J., 1972: Zásobování energií v USA se dostává do kritické situace. Vesmír 51? 6: 

187. 

Hrbáček, J., 1971: Ekologické následky podzemní exploze. Vesmír 51, 8: 250. 

Hrbáček, J. a kol., 1972: Limnologické metody. SPN Praha, 208pp. 

Hrbáček, J., 1971: Modely sladkovodních biomas. In: Biologické problémy vodného 

hospodárstva. Min. les. a vodn. hospodárstva SSR, Bratislava: 70. 

Hrbáček, J., 1971: Jsou fosfáty hlavní příčinou eutrofizace jezer a přehradních nádrží? Vesmír 

50, 4: 125. 

Hrnáček, J., 1971: Rozšíření perlooček rodu Daphnia ve Vysokých Tatrách. Zprávy čsl. spol. 

zoologické 1971, č. 1-3: 83. 

Hrbáček, J., 1971: Polyethylenovými foliemi proti eutrofizaci jezer. Vesmír 50, 8: 254. 

Hrbáček, J., Straškraba, M., 1970: Vltavské údolní nádrže a rekreace. Vesmír 49, 8: 229-232. 

Hrbáček, J., 1970: Člověk a biosféra. Vesmír 49, 11: 323. 

Hrbáček, J., 1970: Co s naftou z havarií tankových lodí? Vesmír 49, 10: 315. 

Hrbáček, J., 1970: Plnění československého příspěvku k mezinárodnímu bioílogickému 

programu v letech 1968 a 1969. Věstník ČSAV 79, 5: 439_442. 

Kořínek, V., Hrbáček, J., 1969: Závislost mezi obsahem živin ve vodě, produkcí 

fytoplanktonu a výnosem ryb v kaprových rybnících. In: Některé poznatky intensifikace 

chovu ryb. Souhrn referátů na semináři Čs. akademie zemědělských věd UVTI, Praha 

pp.57-65. 

Hrbáček, J., 1968: Československý národní komitét pro Mezinárodní biologický program. 

Biologia 23, 2: 97-98. 

Hrbáček, J., 1967: Organisace IBP. Vědecký svět 11, 3: 29-30. 

Hrbáček, J., 1965: Hydrobiologie u nás a ve světě. Vesmír 44, 9: 267-270. 

Hrbáček, J., 1964: Lze poznat četnost rybí osádky v údolních nádržích podle planktonu? Čs. 

rybářství 1964,8: 121-122. 

Hrbáček, J., 1963: Činnost prof. Ant. Friče v hydrobiologii. Časopis Národ. musea 

přírodověd. 132, 4: 195-196. 

Hrbáček, J., 1962: Biologické důsledky teplotní stratifikace v údolních nádržích. In: 

Konference Hygiena údolních nádrží a jejich okolí: 32-34. Ústav pro tvorbu a ochranu 

krajiny, Olomouc. 

Hrbáček, J., 1960: Hydrobiologické otázky v tvorbě krajiny. Tvorba a ochrana krajiny, Nakl. 

ČSAV, pp. 83-91. 

Hrbáček, J., 1959: O domnělé variabilitě Daphnia pulex L. Časopis Národ. musea 128: 9-16 

Hrbáček, J. a kol. , 1959: Hydrobiologické metody. Učební texty vysokých škol, Praha 

Hrbáček, J., 1955: Zákonitosti rozvoje planktonu malých vod. III. konference čsl. 

hydrobiologů ve Smolenicích,: 7 

51

Hrbáček, J., 1954: O kyslíkatých poměrech při výlovech rybníků. Sborník ČSAZV, XXVII, ř. 

B2-3: 293-300. 

Hrbáček, J. a spol., 1954: Jak a proč sbírati hmyz. Naklad. ČSAV, Praha. 

Hrbáček, J., 1954: Hydrobiologie. Učební texty vysokých škol-Biologický fakulta. Praha. 

Hrbáček, J., 1953: Zneklidnění pulců ropuchy obecné a troucích se plotic ve vodě 

s rozpuštěnými látkami z jejich pokožky a všeobecné jejich opouštění takto porušených 

vod. Sborník ČSAZV 16, ř. B: 149-152. Praha. 

Hrbáček, J., 1951: Přehled druhů rodu Hydraena Kug. na území Československé republiky. 

Časopis čsl. spol. entomol. XLVIII: 201-226. Praha 

Hrbáček, J., 1949: Některé zajímavosti ze života pulců ropuchy obecné (Bufo bufo). Vesmír 

1949-1950: 170-171. 

Hrbáček, J., 1949: Pijavka lékařská. Akvar. listy XXI 7: 87-88. 

Hrbáček, J., 1949: Naši kapřivci. Československý rybář, 11: 154-155, Praha. 

Hrbáček, J., 1949: Pohyb Hydrophilidů (Coleoptera) po povrchové blance vodní. Časopis čsl. 

spol. entomol. 46: 3-6. 

Hrbáček, J., 1949: Nález severoamerické ploštěnky Planaria (Euplanaria) tygrina Girard 

(= maculata Leidy) v našich vodách. Akvar. listy XXI, 5: 56-57. 

Hrbáček, J., 1948: Funkce a tvar tykadel brouků středoevropských rodů čeledi Hydrophilidae 

ve vztahu k fylogenezi této čeledi. Entomol. listy XI: 119-125, Brno. 

Hrbáček, J., 1946/47: Preparační jehly. Vesmír 50, Praha. 

Hrbáček, J., 1946/47: Mikroakvária. Vesmír 6, Praha. 

Hrbáček, J., 1946: Dýchání u brouka Hydrobius fuscipes L. Věstník čsl. zool. spol. 10: 119- 

126, Praha. 

Hrbáček, J., 1945/46: Druhý příspěvek k poznání výskytu našich vodních brouků (Coleoptera, 

Haliplidae, Dytiscidae, Gyrinidae, Hydrophilidae). Entomol. listy IX: 9-12. Brno. 

Hrbáček, J., 1945: Fauna brouků a vodních ploštic v našich kalužích. Věda přírodní XXIII: 

269-277. Praha. 

Hrbáček, J., 1945: Výzkum našich vodních brouků s hlediska hydrobiologie. Věda přírodní 

XXIII: 234-239. 

Hrbáček, J., 1945: K výzkumu našeho vodního hmyzu, zvláště vodních brouků. Věda přírodní 

XXIII: 137-140. 

Hrbáček, J., 1945: Poznámky o našich Stratiomyidách (Diptera). Časopis Čsl. spol. Entomol. 

XLI: 95-100. Praha. 

Hrbáček, J., 1944: Příspěvek k poznání výskytu našich vodních brouků. (Coleoptera, 

Haliphidae, Dytiscidae, Hydrophilidae). Časopis Čsl. spol. Entomol. XLI: 67-69. Praha. 

Hrbáček, J., 1943/44: Příspěvek k poznání vodní fauny jezírka v „Macůšce“. Věda přírodní 

XXII: 80, Praha. 

Hrbáček, J., 1943/44: Příspěvek k poznání fauny brouků a ploštic ve vodách třeboňské pánve. 

Věda přírodní XXII: 117-118, Praha. 

Hrbáček, J., 1943/44: O larvách rodu Hydraena (Coleopter, Hydrophilidae). Sborník 

Entomol. odděl. zemského musea v Praze XXI-XXII: 84-89. 

Hrbáček, J., 1943: Dvě nové larvy Hydrophilidů (Cyclostoma orbiculara F. a Chaetarthria 

seminulum Herbst). Časopis Čsl. spol. Entomol. XL: 98-105, Praha 

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anglicky - Institute of Hydrobiology

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