Generation time of Acanthocyclops robustus in relation to food availability and temperature in a shallow eutrophic lake |
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Authors: | Martin Cryer Colin R Townsend |
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Institution: | (1) School of Biological Sciences, University of East Anglia, NR4 7TJ Norwich, England;(2) Department of Conservation, P.O. Box 942, Taupo, New Zealand |
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Abstract: | The generation time of the predatory cyclopoid copepod Acanthocyclops robustus was estimated on 11 occasions during the years 1980 to 1982 in Alderfen Broad. In a multiple regression model, generation time was found to be uncorrelated with temperature, positively correlated (p < 0.05) with the densities of Bosmina longirostris and rotifers, and negatively correlated (p < 0.001) with the density of nauplii of the calanoid copepod Eudiaptomus gracilis. It is suggested that generation time was determined largely by the availability of calanoid nauplii as prey, even though these constituted only 2% of zooplankton standing biomass. |
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Keywords: | Acanthocyclops productivity temperature food limitation generation time |
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