CopÃpodos parasitas de peixes Mugilidae, Centropomidae,Gerreidae do Canal de Santa Cruz e Ãrea de Suape (Pernambuco - Brasil) / Parasitic Copepods of Mugilidae, Centropomidae and Gerreidae Fishes of Santa Cruz Channel and Suape Area (Pernambuco-Brazil)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

Some copepods parasite fishes all over the world and may cause lesions that negatively affects the fisheries and aquaculture economies. The present work had the aim to study the parasitism in fishes of the families Mugilidae, Centropomidae and Gerreidae occurring in the Santa Cruz Channel (7o 34â00ââ- 7o 55â16ââS e 34o 48â48ââ- 34o 52â48ââW) and at Suape area (8o 15â00ââ- 8o 15â00ââS e 34o 55â00ââ- 35o 05â00ââW). These areas are located, respectively, at the North and South littoral of Pernambuco State and they outrank to Northeastern in estuarine artisanal fisheries and fishculture activities. In these areas, three fishes families are important: Mugilidae with the species Mugil curema, M. liza and M. trichodon; Centropomidae with the species Centropomus undecimalis and C. parallelus, Gerreidae with the species Eugerres brasilianus, Diapterus auratus and Eucinostomus gula. In the present study also ocurred Centropomus pectinatus species, cited for the first time in these areas. The ichthyological sampling consisted of 1.080 fishes, collected each two months, from January/1999 to December/2001. In these samples it was identified nine species of parasitic copepods belonging to five families: Bomolochidae (Bomolochus nitidus); Ergasilidae (Ergasilus lizae, E. atafonensis, E. bahiensis, E. caraguatatubensis); Caligidae (Caligus minimus, C. praetextus), Lernanthropidae (Lernanthropus gisleri) and Pennellidae (Lernaeenicus longiventris). The Mugilidae family counted about to 66% of the infested samples, outranking Mugil curema parasited by eight copepods being four Ergasilidae species, two Caligidae species, one Bomolochidae specie and one Pennellidae specie. The Centropomidae family counted to 30% of the infested samples with Centropomus undecimalis and C. parallelus parasited by two copepods species, an specific (L. gisleri) and other no specific (C. praetextus). Only twelve specimens (4%) of Eugerres brasilianus were parasited by two no specific copepods (B. nitidus and C. praetextus). No copepod parasite was found in Centropomus pectinatus and in the other Gerreidae species. In general, the occurrence and distribution of the parasitic copepods were similar to both studied areas, however there was significant difference about prevalence data between Ergasilus atafonensis and Bomolochus nitidus samples and about the absence of Ergasilus lizae in Suape. In relation to the parasitic index it was clear that higher infestation prevalence and moderate intensity was caused by E. atafonensis (until 47.2% and 17.27 parasite/fish) followed by E. lizae (until 17.2% and 6.68 parasites/fish). Caligus minimus, even presenting low prevalence (until 11.6%), showed higher infestation intensity in some samples (until 35.71 parasites/fish). Samples distribution in Mugil curema revealed higher number of parasite copepods during rainy months and in fishes with higher standard lenght, although no differences were observed between sexes. It is presented the histopathological lesions caused by parasitism setting out ones caused by Ergasilus caraguatatubensis and Lernaeenicus longiventris in mugilids. The cytological results showed that the specie B. nitidus doesnât exert parasitism in its hosts. The species Caligus praetextus and Lernathropus gisleri are cited for the first time to Brazil

ASSUNTO(S)

oceanografia ictioparasitologia parasitologia parasitas de peixes ictiologia ictiopatologia doenÃas de peixes

ACESSO AO ARTIGO

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