FEEDING OF CHAOBORUS-FLAVICANS MEIGEN (DIPTERA, CHAOBORIDAE) AND ITS PREDATION ON LAKE ZOOPLANKTON

被引：62

作者：

KAJAK, Z

RYBAK, J

机构：

[1] Polish Academy of Sciences ., Institute of Ecology, Dept. of Hydrobiology, Lomianki, 05-150, Leśny near Warsaw P.O Dziekanów

来源：

INTERNATIONALE REVUE DER GESAMTEN HYDROBIOLOGIE | 1979年 / 64卷 / 03期

关键词：

D O I：

10.1002/iroh.19790640310

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

In a study of Chaoborus feeding in a eutrophic lake, selectivity was found to be positive with Crustacea (especially copepodit stages). and negative with Rotatoria. Daily food rations were about 20% for most of the feeding period, but higher (106%). during the month of intensive growth after hatching. Feeding intensity correlated positively with amount of food an temperature, and negatively with Chaoborus concentration. Elimination of Crustacea (in the epilimnion of the central zone of the lake). equalled about 30–40% of Crustacea production in June and September and slightly exeeded the August production (it was almost zero in the remaining months because Chaoborus larvae stayed at the bottom). This applies, however, only in the central zone – about 50% of the lake volume. Chaoborus probably influences both the density of zooplankton and the quantitative relations between zooplankton species. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：361 / 378

页数：18

共 30 条

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