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Infection dynamics of Diplostomum spathaceum cercariae and parasite-induced mortality of fish hosts

Published online by Cambridge University Press:  06 April 2009

P. Brassard ,
M. E. Rau  and
M. A. Curtis
P. Brassard
Affiliation:
Institute of Parasitology, McGill University, Macdonald College, Ste. Anne de Bellevue, P.Q., CanadaH9X 1CO
M. E. Rau
Affiliation:
Institute of Parasitology, McGill University, Macdonald College, Ste. Anne de Bellevue, P.Q., CanadaH9X 1CO
M. A. Curtis
Affiliation:
Institute of Parasitology, McGill University, Macdonald College, Ste. Anne de Bellevue, P.Q., CanadaH9X 1CO
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Extract

The present study deals with the infection dynamics of Diplostomum spathaceum and with the direct parasite-associated mortality of its experimental fish host, guppies (Lebistes reticulatis) and brook trout (Salvelinus fontinalis). The relationship between exposure density and cercarial penetration of the hosts is essentially linear. There is a significant decrease in the proportion of penetrating cercariae that establish themselves in the fish lens at a high exposure density. The host death rate increases exponentially with parasite burden in both guppies and brook trout.

Type
Research Article
Information
Parasitology , Volume 85 , Issue 3 , December 1982 , pp. 489 - 493
Copyright
Copyright © Cambridge University Press 1982

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