Report on Harmonisation of freshwater biological methods

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seasons for sampling are summer and autumn. In non-wadable rivers, electric fishing,gill nets, drift nets and dragnets are used. Electric fishing is performed from a boat,and sections of about 3 m wide and 100-200 m long along the banks are sampled.When floating nets are used, about 2 km length segments of the main river channelare fished. Bottom gill nets (35-40 m long for each mesh size, ranging from 14-60mm) are set overnight, for about 10 h.Poland149. There is no systematic monitoring programme for fish fauna in Polish rivers.There are some proposals as to how to conduct such a monitoring programme andwhich institution can be mainly involved in it. Up to now the Polish AnglersAssociation is the main institution that collects fish fauna data from the whole Poland.But not all of them can be easily used used as a basis for monitoring according topurposes of WFD framework.150. Electric fishing is the main sampling method used in Poland for assessing fishcommunity composition in rivers. Sampling intensity and sampling area aredependent on river size. Sampling is usually performed seasonally, from spring toautumn.Portugal151. All data are obtained by electric fishing, 90% from wadable rivers and 10%from a boat, in large rivers.152. In wadable rivers, each site is selected in order to sample a representativesequence of habitats (riffle, run and pool). A single passage is performed in upstreamdirection, without stop nets.Sweden153. Electric fishing is the main sampling method used in Sweden, only by wading.Stationary gill nets are occasionally used in wide river bays.154. The sampling strategy is a standardised, representative one, based on thesuccessive removal of fish, with 3 passages per sampling site (length of the samplingstretch = 30-70 m). The preferred season is late summer-early autumn (Aug-Sept).The Netherlands100
155. Fish sampling is performed mainly in large lowland rivers (100-300 m wide).Electric fishing (PDC generator, 300 V, 5A) is usually performed from a boat, alongthe banks, by a staff of 3 persons. The prospected area averages 1000 m 2 , e.g. 500 mlong, 2 m wide along the banks, where the mean water depth is 0.8 m. The preferredseason for electric fishing is from late autumn to early spring. Other techniques,including trawling, fyke and frame nets, are also used in large lowland rivers. Thepreferred season for trawling extends from April to October. On the other hand, fykeand frame nets are preferably used from spring (April) to autumn (November). Nets of5-20 m long are set on the bottom of lowland rivers, at a depth of 3 m for periodsranging from 12 to 154 h.United Kingdom156. The specific equipement and strategies used are generally region and sitedependent. Electric fishing is the most common sampling method used although thegear specifications, technique of application and man-power used has been variablebetween Environmental Agency (EA) area teams. The review of the EA MonitoringProgramme and recent R&D programmes have attempted to standardise the samplingstrategy and methods used for each element of the new monitoring programme whilstretaining some flexibility in approach to allow for evolution. The review is also takingfull consideration of CEN requirements.157. Electric fishing surveys are usually carried out in summer months, postspawning season (June - October). However, some regional and site-specific variationoccurs depending upon the purpose of the surveys, the accessibility of the site and theconditions for efficient sampling, e.g. weed growth. The new sampling programmehas proposed methods to suit different sampling data requirements, different habitatconditions and the manpower required to undertake them.Agencies in Scotland andNorthern Ireland are working closely with the EA in developing standardize fishassessment methods.101
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Institute for Environment and Susta
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CONTENTSBackground and purpose of t
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Background and purpose of the docum
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States and candidate countries. Inf
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classification, each of these being
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BIOLOGICAL QUALITY ELEMENT: PHYTOPL
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indicators, species lists, frequenc
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53. The identification and enumerat
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64. In general, this technique is t
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RIVER BIOLOGICAL QUALITY ELEMENT: F
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84. The development of specific sta
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practice guides for identification
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100. The information received from
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Evaluation of the suitability of cu
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group should update its primary fin
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ReferencesAFNOR (Association Franç
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EN ISO 8689-2 Water quality - Biolo
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Lazaridou-Dimitriadou, M., C. Kouko
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Shannon, C.E. and W. Weaver, 1949.
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Annex I: Composition of the Geograp
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Annex III: River biological assessm
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Annex IV: Analysis of lake biologic
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Number of sampling stations10080%60
Page 49 and 50: IT 90% acetone spectrophotometricPT
Page 51 and 52: 10. The sampling depth and volume s
Page 53 and 54: PTESFIIE5667-2/98 Romanianstandardi
Page 55 and 56: Sampling stations%1008060402001 2-1
Page 57 and 58: MACROPHYTES16. The aquatic Macrophy
Page 59 and 60: Plants sampled per GIG1008060%40Eme
Page 61 and 62: NO qualitativ method species number
Page 63 and 64: indicators, species lists, frequenc
Page 65 and 66: 26. The sampling frequency is varia
Page 67: CEN/TC 230/WG 2/ TG 4 N28, 2 nd wor
Page 70 and 71: programs are based only on the diat
Page 72 and 73: 21. Some countries like France, Est
Page 74 and 75: Table 1. European methods for monit
Page 76 and 77: countries also covers Non-EU Member
Page 78 and 79: 49. The Danish Stream Fauna Index i
Page 80 and 81: Hungary58. Since 2002 a modificatio
Page 82 and 83: Acidification Index, based on the s
Page 84 and 85: Identification is predominantly to
Page 86 and 87: size of the net range between 250 t
Page 88 and 89: water bug genus (Aphelocheirus) and
Page 90 and 91: Table 5. Common abundance classific
Page 92 and 93: 108. Process Assessment focuses on
Page 94 and 95: Austria120. MuLFA: Ecological Integ
Page 96 and 97: Sweden126. Swedish fish Index: Appe
Page 98 and 99: ut comparisons have been made with
Page 102 and 103: 102
Page 104 and 105: Consultation open to ECOSTAT &inter
Page 106 and 107: Table 1. List of European standards
Page 108 and 109: 108
Page 110 and 111: development of typologySweden Yes,
Page 112 and 113: one or other option depends on the
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Page 116 and 117: • An integrated holistic evaluati
Page 118 and 119: • Phytoplankton: Yes; Clorophyll
Page 120 and 121: • Macroalgae: No• Benthic inver
Page 122 and 123: • Macrophytes: No• Macroalgae:
Page 124: Mission of the JRCThe mission of th
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Report on Harmonisation of freshwater biological methods

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