PolidorÃdeos (Polychaeta: spionidae) em Crassostrea rhizophorae (Mollusca: bivalvia) de cinco rios da costa pernambucana

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The Crassostrea rhizophorae occurs along the coast of Brazil serving as food to coastal communities and its production helps the local socio-economic development. Polydiariosis is one of several diseases in the world oyster culture. This disease is caused by a polychaete which drills the shell and inhabits a mud blister inside the oyster; thus, the oysterâs market value is lost. Eight Spionidae genera may be responsible for this damage, being called polydorids. The fauna associated and driller of C. rhizophorae was studied in 5 estuaries from Pernambuco coast: Santa Cruz Canal, Capibaribe, Goiana, Massangana and SirinhaÃm rivers. Twenty oysters were collected in the sublittoral and midlittoral horizons at three points along the rivers. The oysters are differently distributed in the rivers. It was observed that most of the oysters observed were under the market size (6 cm). The oystersâ fouling epifauna was different between estuaries and composed of polychaetes, barnacles, tanaidaceans, anemones and mollusks. Diversity was higher in SirinhaÃm river. On the other hand, Capibaribe river presented the most diverse sublittoral. Two species of polydorides were observed: Polydora websteri and Boccardiella ligerica. Both species occurred together in Goiana and SirinhaÃm rivers; only the P. websteri occurred in the Santa Cruz Canal and Capibaribe river, being absent in Massangana river. They are new records for the Northeast of Brazil. Moreover, they are cryptogenic, damaging several farmings around the world. The rate of infestation and parasitism were different in relation to the infectious agent and sites. They were higher in large-size oysters and in the Capibaribe estuary

ASSUNTO(S)

crassostra spionidae crassostrea polydora bolhas de lodo zoologia mud blister polidiariose polydiariosis polydora boccardiella boccardiella spionidae

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