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Common and rare trout parasites in a small landscape system

Published online by Cambridge University Press:  06 April 2009

R. Hartvigsen  and
O. Halvorsen
R. Hartvigsen
Affiliation:
Zoological Museum, University of Oslo, Sars gt. 1, 0562 Oslo 5, Norway
O. Halvorsen
Affiliation:
Zoological Museum, University of Oslo, Sars gt. 1, 0562 Oslo 5, Norway
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Summary

Brown trout (Salmo trutta) from four lakes within an area of approximately 40 km2 were found to harbour nine helminth species. Crepidostomum metoecus could be classified as core species, while Crepidostomum farionis had an intermediate position. All the others could be classified as satellite species. Salmon (Salmo salar) fingerlings were grown to smolts in an earthpond over the summer. The fingerlings became infected with Crepidostomum spp. which may indicate a superior colonization ability in the core species. The results support the ‘rescue effect hypothesis’ rather than the ‘carrying capacity hypothesis’.

Keywords

Salmo truttahelminth parasitescore speciessatellite speciescolonizationrescue effect hypothesiscarrying capacity hypothesis
Type
Research Article
Information
Parasitology , Volume 106 , Issue 1 , January 1993 , pp. 101 - 105
Copyright
Copyright © Cambridge University Press 1993

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