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

Litaay, Magdalena and De Silva, Sena 2003, Spawning season, fecundity and proximate composition of the gonads of wild-caught blacklip abalone (Haliotis rubra) from Port Fairy waters, south eastern Australia, Aquatic living resources, vol. 16, no. 4, pp. 353-361, doi: 10.1016/S0990-7440(03)00067-6.

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Title Spawning season, fecundity and proximate composition of the gonads of wild-caught blacklip abalone (Haliotis rubra) from Port Fairy waters, south eastern Australia
Author(s) Litaay, Magdalena
De Silva, Sena
Journal name Aquatic living resources
Volume number 16
Issue number 4
Start page 353
End page 361
Publisher Elsevier
Place of publication Paris, France
Publication date 2003-09
ISSN 0990-7440
1765-2952
Keyword(s) Spawning season
Gonadosomatic index
Fecundity
Digestive gland
Proximate composition
Abalone
Summary This study was based on wild-caught blacklip abalone Haliotis rubra 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 (P < 0.05) was evident. Fecundity of blacklip abalone ranged from 1.09 to 7.5 million eggs for females of 12–14.5 cm in length, and 115–487 g in total body weight, respectively. The lipid content of the female gonad increased significantly from about July to November, and an opposite trend was observed for lipid content of the digestive gland. Seasonal changes in the protein and ash contents of the gonad and/or the digestive gland were not always significant.
Language eng
DOI 10.1016/S0990-7440(03)00067-6
Field of Research 070401 Aquaculture
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2003, Éditions scientifiques et médicales Elsevier SAS and Ifremer/IRD/Inra/Cemagref
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002134

Document type: Journal Article
Collection: School of Ecology and Environment
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