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Occurrence of the Metacercariae, of Cotylurus erraticus (Rudolphi, 1809) Szidat, 1928 (Digenea: Strigeidae) in Brown Trout Salmo trutta L., and Rainbow Trout S. gairdneri Richardson, 1836, from Hanningfield Reservoir, Essex

Published online by Cambridge University Press:  18 November 2009

R. Wootten
R. Wootten
Affiliation:
Department of Zoology, Imperial College, London SW7
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Extract

Brown and rainbow trout from Hanningf?eld Reservoir, Essex and rainbow trout from associated raceways were found to be infected with the metacercariae of Cotyluriis erraticus throughout 1968. Both o brown and rainbow trout of age 2+ introduced into the reservoir in the spring became heavily infected with C. erraticus during their first summer in the reservoir. Rainbow trout were more heavily infected than brown trout. Infection increased with age in rainbow trout but this was not apparent in brown trout. The metacercariae are almost completely restricted to the pericardial cavity of the trout. The life-cycle of C. erraticus in Hanningfield possibly involves gulls as final hosts and the gastropod Valvata piscinalis as first intermediate host. C. erraticus has probably been introduced into the reservoir in infected trout from outside sources, or by infected avian final hosts.

Type
Research Article
Information
Journal of Helminthology , Volume 47 , Issue 4 , December 1973 , pp. 389 - 398
Copyright
Copyright © Cambridge University Press 1973

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References

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