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Changes in metabolism and behaviour of the freshwater copepod Cyclops strenuus abyssorum infected with Diphyllobothrium spp

Published online by Cambridge University Press:  06 April 2009

A. F. Pasternak ,
F. A. Huntingford  and
D. W. T. Crompton
A. F. Pasternak
Affiliation:
Fish Behaviour and Ecology Group, Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
F. A. Huntingford
Affiliation:
Fish Behaviour and Ecology Group, Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
D. W. T. Crompton
Affiliation:
Fish Behaviour and Ecology Group, Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
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Summary

In a population of copepods (Cyclops strenuus abyssorum), with a naturally high prevalence of infection with procercoids of Diphyllobothrium spp., no difference in body size was found between infected and uninfected hosts. However, a significant reduction in the reproductive capacity of infected females was observed, 87% of uninfected females having developed eggs in their gonads and sacs compared with 21% of infected females. The feeding rate of infected copepods was relatively high soon after infection occurred, but gradually decreased to less than half that of uninfected animals. Respiration rate was also lower in infected copepods. Infected copepods showed reduced motility and impaired escape responses, which is likely to make them more susceptible to predation.

Keywords

respirationfeedingmotilityescape responses
Type
Research Article
Information
Parasitology , Volume 110 , Issue 4 , May 1995 , pp. 395 - 399
Copyright
Copyright © Cambridge University Press 1995

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