Document Detail


Condition factor of Astyanax intermedius Eigenmann, 1908 (OSTEICHTHYES, CHARACIDAE) parasitised by Paracymothoa astyanaxi Lemos de Castro, 1955 (CRUSTACEA, CYMOTHOIDAE) in the Grande River, Serra do Mar State Park - Santa Virgínia Unit, São Paulo, Brazil.
MedLine Citation:
PMID:  22735147     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
In this work the length-weight relationship and the condition factor of Astyanax intermedius parasitised and not by Paracymothoa astyanaxi were analysed in the Grande River. The length-weight relationship was estimated for females, males and immatures, and seasonally for the fishes and the parasites through the expression W = aLb. The condition factor of non-parasitised specimens differed seasonally and between sexes, contrasting with the results for parasitised fishes which showed no differences between sexes and season. The condition factor of non-parasitised specimens was higher than that of the parasitised fishes. Specimens of Astyanax intermedius parasitised do not have the same biotic conditions compared to non-parasitised individuals, in which the condition factor was similar over the years. In conclusion, parasitism by P. astyanaxi has deleterious effects on this host population which may cause changes in the reproductive and food dynamics of parasitised specimens due to low body conditions.
Authors:
Lm Gomiero; Up Souza; Fms Braga
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Brazilian journal of biology = Revista brasleira de biologia     Volume:  72     ISSN:  1678-4375     ISO Abbreviation:  Braz J Biol     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-06-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101129542     Medline TA:  Braz J Biol     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  379-88     Citation Subset:  IM    
Affiliation:
Department of Zoology, Universidade Estadual Paulista, Rio Claro, SP, Brazil, 13506-900.
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