Full-text - Norsk entomologisk forening

More documents

Recommendations

Info

146 J. E. Brittain 0-3 NYMPHS I I 1 0L 1 M I J I J I A I S O N MONTH Fig. 8. Life cycle of Hefitagenia fuscogrisea in Setten (loc. 30). +i 4f+ NYMPHS 01 I I I I 1 I 1 1 1 A M J J A S O N D MONTH Fig. 9. Life cycles of Leptophlebia marginata (shaded) and L. vespertina (unshaded) in Burudvann (loc. 29). Arrows'indicate the presence of adults of the respective species. mented in Britain (Moon 1938, Macan 1961, (1972, 1973) and L. marginatu by Bengtsson 1965, and Brittain 1972b). In Sweden, L. (1968). Both species are univoltine, with the vespertina has been studied by Kjellberg possible exception of the Swedish mountainc
Ephemeroptera and Plecoptera 147 April to 15 July and for L. vespertina from - I 24 May to 9 September. Generally the peak 12- emergence of L. marginata varied from May in lowland localities to Junel July in the higher .]' " regions, while that of L. vespertina was in 10 I most cases approximately one month later. A I O 24A~r.72 major factor determining the time of emer- 8- 9 gence of these two species is temperature (Macan & Maudsley 1966, Brittain, in press) so it is to be expected that emergence will take place later at higher altitudes. Nymphal r4 growth in a lowland locality, Burudvann, is E - + shown in Fig. 9. b The absolute size of each species at a given z time can also vary within the same lake. For ' 4 Y example, in Bogstadvann size differences e are apparent between the three sampling stations (Fig. 10). Stations 1 and 3 are stony shores, while station 2 is a shallow bay with emergent vegetation where both temperature O- aNvmpHs and primary production are generally higher. In addition, station 2 has a smaller populast.l st.2 st.3 tion of L. marginata which would reduce any Fig. 10. Size difference between Leptophlebia P~~~~~~~ inters~ecific com~etition. marginata (shaded) and L. vespertina (unshaded) at 3 sampling stations around Bogstadvann (loc. 33). Caenis horaria (L.) In a study of what was at the time thought to be a population composed solely of C. horaria. (Kjellberg 1973), L. marginata being larger but may have been a composite population of at a given time and emerging earlier than C. horaria and C. moesta (Moon 1938), it L. vespertina. Emergence of both species takes was found that no growth occurred during place later in Scandinavia than in Britain the winter months. The species was univoltine, because of lower water temperatures and the emerging in June and July and small nymphs presence of a cover of ice until MayIJune. appearing again by the end of July. In the present study the limits recorded for Essentially the same situation as Moon the flight period of L. marginata were 24 (1938) found in the English Lake District was 6, 0 " 3 NYMPHS E % - V E 4- z w A 2 - - 01 I 1 I 1 I I I A M J J A S O MONTH Fig. 11. Life cycle of Caenis horaria in Semsvann (loc. 32). + indicates adults present.
Page 2 and 3: Norsk Entorriologisk Tidsskrift Nor
Page 4 and 5: 451 1 I I I I I I I 4 6 8 10 12 14
Page 6 and 7: Dry Weight , mg. Fig. 7. Correlatio
Page 8 and 9: Table 11. Caloric values per g dry
Page 10 and 11: Talbe IV. Oxygen consumption given
Page 12 and 13: etween the sexes during the respira
Page 14 and 15: 128 A. Fjellberg Fig. 2. A. sefiten
Page 16 and 17: 130 A. Fjellberg HABITATS Until now
Page 18 and 19: 132 L. Semme the autumn. The prelim
Page 20 and 21: '~0~1-0611 '96 'lourouy 'uu3 's3asu
Page 22 and 23: 136 J. E. Brittain Fig. 1. The loca
Page 24 and 25: 138 J. E. Brittain period was longe
Page 26 and 27: 140 J. E. Brittain Table 11. Ph~sic
Page 28 and 29: 142 J. E. Brittain Table IV. Physic
Page 30 and 31: 144 J. E. Brittain EPHEMEROPTERA Am
Page 34 and 35: 148 J. E. Brittain 1-3 NYMPHS 01 I
Page 36 and 37: 150 J. E. Brittain Nemzlrella picte
Page 38 and 39: 152 J. E. Brittain ture and the inc
Page 40 and 41: (Nord-Norwegen) (Trichoptera, Pleco
Page 42 and 43: from anoxia. Drops of haemolymph we
Page 45 and 46: Notes on little known spiders in No
Page 47 and 48: Symphyla and Pauropoda from two con
Page 49 and 50: Symphyla and Pauropoda 163 Table 11
Page 51: sults it is clear that the animals
Page 54 and 55: 168 7. R. Nielsen K L M N Fig. l. O
Page 56 and 57: 170 T. R. Nielsen Table 1. A compar
Page 59 and 60: Abundance and diversity in the faun
Page 61 and 62: Nocturnal moths 175 Table 1. Number
Page 63 and 64: Nocturnal moths 177 Grimstad Amli 1
Page 65 and 66: Nocturnal moths 179 Am/i. Norway 19
Page 67 and 68: Nocturnal moths 181 Grimstad, Norwa
Page 69 and 70: Nocturnal moths 183 %60 50 40 30 20
Page 71 and 72: Spinosellina forms of Sminthurides
Page 73 and 74: A constant pressure microrespiromet
Page 75: Microrespirometer 189 termination o
Page 78 and 79: 192 F. E. Klallsen The specimens fr
Page 80 and 81: 194 F. E. Klausen REFERENCES Ardii,
Page 82 and 83:
196 A. Lillehammer present in Norwa
Page 84 and 85:
198 A. Lillehammer Results The numb
Page 86 and 87:
200 A. Lillehammer Fennoscandian co
Page 88 and 89:
202 A. Lillehammer parts of the are
Page 90 and 91:
204 A. Lillehammer carnivorous spec
Page 92 and 93:
Table IV. Species distribution, in
Page 94 and 95:
Table V. Species distribution in se
Page 96 and 97:
210 A. Lillehammer The bottom of th
Page 98 and 99:
212 A. Lillehammer Blatjemn Diura b
Page 100 and 101:
Table VII. Species distribution in
Page 102 and 103:
Z 0 ...... ~ '"s' '" ~ .... '.xl ~
Page 104 and 105:
Table IX. Species distribution in s
Page 106 and 107:
220 A. Lillehammer same latitude as
Page 108 and 109:
222 A. Lillehammer Table XI. The pH
Page 110 and 111:
224 A. Lillehammer These species se
Page 112 and 113:
226 A. Lillehammer Table XVI. The s
Page 114 and 115:
228 A. Lillehammer Fig. 22. Stream
Page 116 and 117:
230 A. Lillehammer Fig. 25. Distrib
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
238 A. Lillehammer high altitude la
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
244 A. Lillehammer streams and rive
Page 132 and 133:
246 A. Lillehammer Blies (1953, 195
Page 134 and 135:
248 A. Lillehammer streams are to a
Page 136 and 137:
250 A. Lillehammer Muller, K. 1955.
Page 138 and 139:
252 Bokanmeldelser produserende, en
Page 140 and 141:
N orsk Entomologisk Tidsskrift Norw
Page 142 and 143:
SHORT COMMUNICATIONS C. van Achterb
Page 144:
publications on sale from Norsk Ent
show all

Full-text - Norsk entomologisk forening

Create successful ePaper yourself

Delete template?

Save as template?