Document Detail

Increased parasite abundance associated with reproductive maturity of the clam Anodonta piscinalis.
MedLine Citation:
PMID:  10386464     Owner:  NLM     Status:  MEDLINE    
Several studies on vertebrates have demonstrated that reproductive activities may increase the parasite load, but this has not been shown in invertebrate hosts. We studied abundance of a potentially harmful gill parasite, the ergasilid copepod Paraergasilus rylovi, from the freshwater bivalve host Anodonta piscinalis in relation to reproductive maturity of the host in the field. Prevalence of this previously unstudied parasite varied from 90 to 100%, and the mean parasite abundance from 16.3 to 28.8 among 3 study populations. Abundance of P. rylovi increased with host size. In the maturating age groups (3-5 yr) the length-adjusted mean parasite abundance among mature, reproducing female clams that brooded glochidia larvae was 2 times higher than in nonreproducing females, the observed pattern being consistent among the 3 study lakes. Alternative, mutually nonexclusive explanations may be found for the result. For example, changes in clam behavior or filtration activity accompanying maturation can increase host exposure to parasites, or reproduction may decrease energy available to host immunologic defense. However, the present result indicates that maturation, and reproduction, is associated with increased parasite abundance in A. piscinalis, an invertebrate host.
J Taskinen; M Saarinen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of parasitology     Volume:  85     ISSN:  0022-3395     ISO Abbreviation:  J. Parasitol.     Publication Date:  1999 Jun 
Date Detail:
Created Date:  1999-07-01     Completed Date:  1999-07-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7803124     Medline TA:  J Parasitol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  588-91     Citation Subset:  IM    
Department of Biological and Environmental Sciences, University of Jyväskylä, Finland.
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MeSH Terms
Bivalvia / parasitology*,  physiology
Crustacea / growth & development*
Gills / parasitology
Sexual Maturation
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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