| Three indexes of quality of Japanese oyster Crassostrea gigas were studied in 3 lots of oysters bred in the r.1arennes-oléron basin from february to july 1979: condition index of MEDCOF &-. NEEDLER, thickness coefficient of IMAI & SAKAI and external quality coefficient of BERTHOME. These different indexes were correlated within each lot of oysters. The external quality coefficient is always significantly correlated with condition index, while thickness coefficient is correlated with other two only for one lot, but seemes useful to rate oyster growth better. |
