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Proteocephalus neglectus as a possible indicator of changes in the ecological balance of aquatic environments

Published online by Cambridge University Press:  05 June 2009

V. Hanzelová
V. Hanzelová
Affiliation:
Helminthological Institute of the Slovak Academy of Sciences 040 01 Košice, (Czech and Slovak Federal Republic), Czechoslovakia
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Abstract

In an environment seriously impaired by human interference (draining the reservoir), ecological relationships in a community of copepods and their impact on the transmission of the tapeworm Proteocephalus neglectus La Rue. 1911 were studied. The impairment of the environment resulted in changes in the species composition of the copepod community and in the increased diversity of the copepod species, as well as in a multiple inversion of the dominant and subdominant relationships of the two most numerous copepod species (Cyclops vicinus and Eudiaptomus zachariasi). The structure of the developmental stages of the copepod community, the seasonal dynamics of the number of copepods and the abundance of P. neglectus procercoids have changed. The predominant species in the copepod community and the most susceptible intermediate host of P. neglectus (C. vicinus) was not infected. The infection of copepods decreased by 95% and that of the definitive hosts (Oncorhynchus mykiss) by 97·5% compared with the index values recorded in the previous year.

Keywords

Proteocephalus neglectusOncorhynchus mykisscopepodsecologyCestodaseasonal dynamics
Type
Research Article
Information
Journal of Helminthology , Volume 66 , Issue 1 , March 1992 , pp. 17 - 24
Copyright
Copyright © Cambridge University Press 1992

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