New Zealand Journal of Marine and Freshwater Research abstracts

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No evidence for reduced genetic variation in the accidentally introduced oyster Crassostrea gigas in New Zealand

P. J. SMITH
H. OZAK
P Y. FUJIO

Fisheries Research Centre Ministry of Agriculture and Fisheries P. O. Box 297, Wellington New Zealand
Department of Fishery Science Faculty of Agriculture Tohoku University 1-1 Amamiyamachi, Tsutsumidori Sendai 980 Japan

Abstract The Pacific oyster, Crassostrea gigas, was accidentally introduced into New Zealand and first recorded here in 1971. Starch gel electropho-resis has been used to estimate genetic variation in two populations of C. gigas from the east and west coasts of New Zealand and in one population from Japan. At seventeen loci the common alleles in Japan are common to those in New Zealand. Genetic variation (measured as proportion of loci polymorphic, effective number of alleles, and het-erozygosities) is similar in New Zealand and Japan. It is concluded that the New Zealand population shows no evidence for reduced genetic variation. The origin of the New Zealand populations is discussed.

Keywords genetic variation; electrophoresis; Crassostrea gigas; Pacific oyster; New Zealand; Japan

New Zealand Journal of Marine and Freshwater Research, 1986, Vol. 20: 569-574 Received 19 November 1985; accepted 19 February 1986

PDF file of entire paper: medium quality (527K); (scanned from paper original: notes about this process)

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