Production rate of seedling of Crassostrea gigas produced in laboratory and cultivated in natural cattings in the lagunar estuary region of Cananéia 25º S í 48º w

Abstract

The survival and growth of the larvae of the first generation of the Japanese mother-oysters Crassostrea gigas, produced in Cananéia and placed on substrates of cement amianthus and shell of Pecten sp were observed. This experiment was carried out from March to December 1983 and was installed in the estuarine region of Cananéia at three stations which were characterized by a strong, intermediate and weak influence of the open-sea waters. After nine months of cultivation, the survival rate and the maximum size reached by the oysters were respectively: at Station I, 17% and 5.03 cm; Station II, 37.5% and 7.23 cm, and Station III, 13% and 8.15 cm. The type of substrate tested had no influence. The first generation of C. gigas showed cultivation viability in the estuary of Cananéia.