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The estimation of crop evacuation rates in Chaoborus larvae (Diptera: Chaoboridae) using natural prey
Author(s) -
GIGUÈRE L. A.
Publication year - 1986
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1986.tb00997.x
Subject(s) - predation , biology , zooplankton , functional response , larva , ecology , instar , crustacean , digestion (alchemy) , zoology , predator , chemistry , chromatography
SUMMARY. 1. Crop evacuation rates were estimated for the first time in Chaoborus larvae, using natural prey. 2. Fourth instar C. americanus Matheson digested copepods (Diaptomus leptopus S.A. Forbes) 48.7% faster than daphnids (Daphnia rosea Leydig) of similar size; meal size did not significantly affect the instantaneous rate of digestion (IRD) within each prey type. Prey specific IRD has not been reported before for zooplankton. 3. Prey specific differences in IRD require the use of natural prey when digestion experiments are to be used to estimate natural rates of food consumption of animals.