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Helminths parasitizing larval fish from Pantanal, Brazil

Published online by Cambridge University Press:  01 March 2009

A.C.F. Lacerda ,
M. Santin ,
R.M. Takemoto ,
G.C. Pavanelli ,
A. Bialetzki  and
F.C. Tavernari
A.C.F. Lacerda*
Affiliation:
Department of Biology, Nupélia, Postgraduate Course in Ecology of Continental Aquatic Environments (PEA), State University of Maringá (UEM), Maringá, Paraná, Brazil
M. Santin
Affiliation:
Department of Biology, Nupélia, Postgraduate Course in Ecology of Continental Aquatic Environments (PEA), State University of Maringá (UEM), Maringá, Paraná, Brazil
R.M. Takemoto
Affiliation:
Department of Biology, Nupélia, Postgraduate Course in Ecology of Continental Aquatic Environments (PEA), State University of Maringá (UEM), Maringá, Paraná, Brazil
G.C. Pavanelli
Affiliation:
Department of Biology, Nupélia, Postgraduate Course in Ecology of Continental Aquatic Environments (PEA), State University of Maringá (UEM), Maringá, Paraná, Brazil
A. Bialetzki
Affiliation:
Department of Biology, Nupélia, Postgraduate Course in Ecology of Continental Aquatic Environments (PEA), State University of Maringá (UEM), Maringá, Paraná, Brazil
F.C. Tavernari
Affiliation:
Department of Animal Sciences, Postgraduate Course in Animal Sciences, Federal Rural University of Pernambuco (UFRPE), Recife, Pernambuco, Brazil
*
**[email protected]
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Abstract

Fish larvae of ‘corvinas’ (Pachyurus bonariensis and Plagioscion ternetzi) from Sinhá Mariana Lagoon, Mato Grosso State, were collected from March 2000 to March 2004, in order to determine the parasitic fauna of fishes. Larvae from the two species were parasitized by the same endoparasites: Contracaecum sp. Type 2 (larvae) (Nematoda: Anisakidae) in the mesentery and Neoechinorhynchus (Neoechinorhynchus) paraguayensis (Acanthocephala: Neoechinorhynchidae) in the stomach and the terminal portion of the intestine. Statistical analysis showed that there was a significant positive correlation between the standard length of hosts and the abundance of acanthocephalans and nematodes, and that the prevalence of nematodes presented a significant positive correlation with the standard length of the two species of hosts, indicating the presence of a cumulative process of infection. The present study constitutes the first record of nematodes and acanthocephalans parasitizing larval fish, as well as the first record of endoparasites in fish larvae in Brazil. In addition, it lists a new locality and two species of hosts for Contracaecum sp. Type 2 (larva) and N. (N.) paraguayensis.

Type
Research Papers
Information
Journal of Helminthology , Volume 83 , Issue 1 , March 2009 , pp. 51 - 55
Copyright
Copyright © Cambridge University Press 2009

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