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Parasitic castration of Buccinanops cochlidium (Gastropoda: Nassariidae) caused by a lepocreadiid digenean in San José Gulf, Argentina

Published online by Cambridge University Press:  08 February 2010

A. Averbuj  and
F. Cremonte
A. Averbuj*
Affiliation:
Centro Nacional Patagónico CONICET, Bvd. Brown 2915 (U9120ACD), Puerto Madryn, Chubut, Argentina
F. Cremonte
Affiliation:
Centro Nacional Patagónico CONICET, Bvd. Brown 2915 (U9120ACD), Puerto Madryn, Chubut, Argentina
*
*Fax: +54 2965 451543 E-mail: averbuj@cenpat.edu.ar
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Abstract

Parasitic castration of Buccinanops cochlidium from San José Gulf, Argentina, caused by a lepocreadiid digenean, is reported for the first time. Rediae and ophtalmotrichocercous cercariae probably belonging to Opechona sp. were identified in the gonad and digestive gland. Opechona sp. has been reported previously parasitizing B. monilifer from a northern locality in the Argentine Sea. Overall prevalence of infection was 15.5%; it varied seasonally, rising during the warm months after the host oviposition period. Cercariae were expelled at the same time as the hatching of snail embryos (during the higher water temperature period). Rediae affected male and female snails equally, but prevalence increases along with host size. The parasite causes the complete castration of the host. Parasitized adult snails showed a reduction of penis size in comparison with healthy males. It remains to be confirmed whether the peak of cercariae emission coincides with the presence of jellyfishes and scombrid or other fishes in the area, which could act as second intermediate and definitive hosts, respectively.

Type
Research Papers
Information
Journal of Helminthology , Volume 84 , Issue 4 , December 2010 , pp. 381 - 389
Copyright
Copyright © Cambridge University Press 2010

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