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Density-dependent effects of Anguillicola crassus (Nematoda) within and on its copepod intermediate hosts

Published online by Cambridge University Press:  06 April 2009

S. T. Ashworth ,
C. R. Kennedy  and
G. Blanc
S. T. Ashworth*
Affiliation:
Department of Biological Sciences, University of Exeter, Prince of Wales Road, Exeter EX4 4PS, UK
C. R. Kennedy
Affiliation:
Department of Biological Sciences, University of Exeter, Prince of Wales Road, Exeter EX4 4PS, UK
G. Blanc
Affiliation:
Ministère de l'Agriculture et de la Pêche, Ecole Nationale Vétérinaire de Nantes, C.P. 3013, 44087 Nantes, Cedex 03, France
*
* Corresponding author. Tel: 01392 263263. Fax: 01392 263700. E-mail: [email protected].
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Summary

Density-dependent effects of Anguillicola crassus larval infections in the copepod intermediate host were examined experimentally. Three species of copepods (Cyclops vicinus, C. viridis and C. fuscus) were subjected to a range of doses of larval A. crassus within infection arenas. Prevalence, intensity and parasite dispersion (variance: mean abundance) values increase and then approach an asymptote as infection dose increases. Infection parameters differ between species of copepod. Increasing temperature has a negative effect on the establishment of the parasite population within the intermediate host. Parasite-induced host mortality increases with dose. These mechanisms have the potential to regulate populations of A. crassus larvae within the copepod population and hence the whole suprapopulation.

Keywords

Anguillicola crassusdensity-dependencecopepod
Type
Research Article
Information
Parasitology , Volume 113 , Issue 3 , September 1996 , pp. 303 - 309
Copyright
Copyright © Cambridge University Press 1996

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