Abstract
The present work studied the seasonal variation of the metazoan parasites of Geophagus brasiliensis from the Guandu river, State of Rio de Janeiro, Brazil. Four collections of 50 specimens of G. brasiliensis were accomplished between April 2006 and March 2007, in the different seasons. A total of 14 species of metazoan parasites were obtained: six trematodes ( Crassicutis sp. in adult stage and five metacercariae, Austrodiplostomum compactum, Diplostomulum sp., Neascus type 1, Neascus type 2 and Posthodiplostomum sp.), three nematodes ( Contracaecum sp. larval, Cucullanus sp. and Procamallanus (Procamallanus) peraccuratus adult); monogenean ( Sciadicleithrum guanduensis ); acanthocephalan ( Neoechinorhynchus paraguayensis ), larval glochidia; and hirudinean species of Glossiphonidae and Piscicolidae. With the exception of Glossiphonidae hirudinean, all parasite species showed prevalence and abundance peaks mainly in the spring sample, which could indicate seasonality of these parasite species in G. brasiliensis from the Guandu River.
Highlights
Na região Neotropical são poucos os trabalhos relativos à variação temporal em parasitos de peixes de água doce
The present work studied the seasonal variation of the metazoan parasites of Geophagus brasiliensis
Four collections of 50 specimens of G. brasiliensis were accomplished between April 2006
Summary
Entre abril de 2006 e março de 2007, foram realizadas quatro coletas trimestrais de G. brasiliensis. As diferenças entre os valores totais médios e por coleta do comprimento e peso dos hospedeiros e o fator de condição alométrico foram avaliadas com o teste de Anova e com o teste a posteriori de Tukey (ZAR, 1999). De acordo com as prevalências observadas, nove espécies de parasitos foram utilizadas para as análises comparativas entre as coletas sazonais, os trematódeos Austrodiplostomum compactum (Lutz, 1928), Neascus tipo 1, Neascus tipo 2 e Posthodiplostomum sp.; os nematóides Contracaecum sp. Diferenças entre comprimento total (cm), peso (g) e fator de condição alométrico (K) de Geophagus brasiliensis do rio Guandu, Seropédica, Estado do Rio de Janeiro, Brasil, com avaliação pelo teste a posteriori de Tukey (Q).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
