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Studies on triploid oysters in Australia .6. Gonad development in diploid and triploid Sydney rock oysters Saccostrea commercialis (Iredale and Roughley)

Citation

Cox, ES and Smith, MSR and Nell, JA and Maguire, GB, Studies on triploid oysters in Australia .6. Gonad development in diploid and triploid Sydney rock oysters Saccostrea commercialis (Iredale and Roughley), Journal of Experimental Marine Biology and Ecology, 197, (1) pp. 101-120. ISSN 0022-0981 (1996) [Refereed Article]

DOI: doi:10.1016/0022-0981(95)00147-6

Abstract

Triploid Sydney rock oysters, Saccostrea commercialis (produced using cytochalasin B to treat newly fertilised eggs), were sampled from 22-34 months of age to encompass a full reproductive season. A comparative assessment of the extent of gametogenesis was made for both diploid and triploid Sydney rock oysters. It was necessary to develop separate staging criteria for the triploids. Triploid gametogenesis was highly retarded compared to the diploids. The extent of retardation of gametogenesis in the triploids was more severe than that observed for triploid Pacific oysters. In particular, triploid females developed abnormally and follicle branching was severely retarded with few mature ova present. Development in the male triploid appeared to hall at spermatocyte formation; on the few occasions that spermatids were present they were sparsely distributed throughout the gonad. In the thirteen months of sampling, there was no evidence of spawning in the triploids. Very few hermaphrodites were found in either diploids or triploids sampled. Sex ratios showed little change over time for diploids and for triploid males but the incidence of triploid females increased between January and May. The gonad area indices for triploids (sexes combined) were consistently much lower than for those of either diploid males or females.

Item Details

Item Type:Refereed Article
Research Division:Technology
Research Group:Medical Biotechnology
Research Field:Medical Biotechnology not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Other Animal Production and Animal Primary Products
Objective Field:Animal Production and Animal Primary Products not elsewhere classified
Author:Cox, ES (Ms Elizabeth Cox)
Author:Nell, JA ( Nell)
Author:Maguire, GB (Dr Greg Maguire)
ID Code:7588
Year Published:1996
Web of Science® Times Cited:36
Deposited By:TAFI - Aquaculture
Deposited On:1996-08-01
Last Modified:2011-08-19
Downloads:0

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