Spawning season, fecundity and proximate composition of the gonads of wild-caught blacklip abalone () from Port Fairy waters, south eastern Australia

Author： Litaay Magdalena De Silva Sena S.

Publisher： Edp Sciences

E-ISSN： 1765-2952|16|4|353-361

ISSN： 0990-7440

Source： Aquatic Living Resources, Vol.16, Iss.4, 2003-09, pp. : 353-361

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Abstract

This study was based on wild-caught blacklip abalone L., from Port Fairy waters, south eastern Australia (142°15'E; 38°21'S), from July 1998 to November 1999, and was initiated to evaluate the spawning season and other aspects of its reproductive biology. The shell length and body weight of female and male abalone sampled ranged from 12.0 to 18.6 and 12 to 15 cm, and 137 to 529 and 148 to 585 g, respectively. The sex ratio did not vary significantly from 1:1 through the year. The gonadosomatic index (GSI) ranged from 3.0% to 8.4% in males, and 2.5% to 14.1% for females, and the highest GSI as well as the highest proportion of mature animals were recorded from September to October. During these months the hepatosomatic index (HSI) was low, and an inverse correlation between GSI and HSI (