RATIO BETWEEN THE SURVIVAL AND FECUNDITY IN THE COHORTS OF DAPHNIA LONGISPINA (CLADOCERA) UNDER DIFFERENT TROPHIC CONDITIONS
Abstract
The survival and fecundity of Daphnia longispina were studied in life-table experiments under different Chlorella sp. concentrations (0.08, 0.18 and 0.36 mg/L). The survivorship-weighted fecundity decreased at low concentration of food, but two or more maxima were found at higher concentrations. The “reproductive cost” hypothesis was tested using the data of life-table experiments. It was shown that this hypothesis is confirmed only for low food concentration.
About the Author
V. P. Semenchenko
Scientific and Practical Center for Bioresources of the National Academy of Sciences of Belarus
Belarus
Corresponding Member, D. Sc. (Biology), Deputy Director
Belarus
Corresponding Member, D. Sc. (Biology), Deputy Director
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