Changes in the condition index for mangrove oysters (Crassostrea rhizophorae) from Todos os Santos Bay, Salvador, Brazil

Abstract

The condition index was calculated for two samples of 600 C. rhizophorae taken from Jacuruna farm in SeptemberOctober 1977 (spawning period) and December 1977- January 1978 (post-~awni~ period). There was a significant difference (P < 0.05). Over the size range 2.1 to 10.0 cm (height) the condition index ranged from 59.0 + 16.2 to 71.8 f 30.,5 for the spawning period, but was only 27.1 * 10.2 to 43.9 2 33.0 for the post-spawning period. The size class 4.1 to 6.0 cm gave the best commercial yields and was considered more suitable for the shucked oyster than the fresh oyster market.