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Naturalized populations of oysters, Crassostrea gigas along the South African coast: distribution, abundance and population structure.

From: Journal of Shellfish Research  |  Date: 8/1/2005  |  Author: Bloomer, P.; Griffiths, C.L.; Hare, M.P.; Robinson, T.B.; Tonin, A.

ABSTRACT The Japanese oyster Crassostrea gigas forms the mainstay of the South African oyster farming industry. Despite having been cultured along the South African coast for 30 years, this is the first record of naturalized populations of this well known global invader from the region. DNA sequence data confirmed the presence of C. gigas in the Breede and Goukou estuaries. Populations of 184,206 [+ or -] 21 058.9 (SE), 876 [+ or -] 604.2 (SE) and 1 228 [+ or -] 841.8 (S.E.) ... <0.01) but no difference was found between the Goukou and Knysna estuaries (Kruskal-Wallis ANOVA H = 48.249, P>

<0.01), but no difference was found between the Goukou and Knysna Estuaries (Kruskal-Wallis ANOVA H = 48.249, P>

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