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Published online by Cambridge University Press: 05 June 2009
Both brown trout, Salmo trutta, and rainbow trout, S. gairdneri, from Hanningfield Reservoir, Essex, and adjacent rearing channels, harboured Eubothrium crassum throughout 1968. There was no seasonal cycle of occurrence or maturation of the cestode.
2+ brown trout introduced into the reservoir in the spring acquired heavy infestations during their first summer in the reservoir. Most of these cestodes are apparently lost from fish which have been in the reservoir for a year or more. Possible reasons for this loss are discussed.