Journal
FISHERIES MANAGEMENT AND ECOLOGY
Volume 10, Issue 3, Pages 155-162Publisher
BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.1365-2400.2003.00332.x
Keywords
allozymes; Australia; fisheries management; Pagrus auratus; population genetics; stock structure
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The population genetic structure of snapper, Pagrus auratus (Bloch and Schneider), in Victoria was investigated using six polymorphic allozyme loci. Fish were sampled from four sites in Victoria and single locations in South Australia, Western Australia and New Zealand. Although there were distinct genetic differences between the snapper populations from each of the Australian states and New Zealand, only minor and largely insignificant differences were detected among Victorian populations. The results are consistent with previous genetic and tagging studies that indicate no mixing between snapper stocks in Victoria and Spencer Gulf in South Australia. This justifies separate management of the snapper fisheries in these regions. The low levels of polymorphism and heterozygosity in Victorian snapper suggest an isolation by distance model of population structure rather than one of discrete subpopulations.
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