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Dactylogyrus (Monogenea) communities on the gills of roach in three lakes in Central Finland

Published online by Cambridge University Press:  06 April 2009

M. Koskivaara
Affiliation:
Department of Biology, University of Jyväskylä, 40100 Jyväskylä, Finland
E. T. Valtonen
Affiliation:
Department of Biology, University of Jyväskylä, 40100 Jyväskylä, Finland

Summary

Dactylogyrus (Monogenea) species were studied on the gills of roach (Rutilus rutilus) from a total of 293 fish in 3 interconnected lakes in Central Finland. One of the lakes is eutrophic and polluted by a paper and pulp mill, one is eutrophic and one is oligotrophic. Nine Dactylogyrus species were found. The structure of the monogenean communities was analysed at the component and infracommunity level and the Dactylogyrus fauna of the lakes was compared. Although it was found that the component communities tended to be very similar there were also differences. The abundance and diversity were highest in the polluted lake; the infracommunities of this lake were considerably more often dominated by Dactylogyrus micracanthus and the similarities between the infracommunities were higher within the lakes than between the lakes. It is suggested that these differences are due to the differing water quality of the lakes. The nature of the monogenean community, its possible interactivity, is also discussed.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1992

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