New Zealand Journal of Marine and Freshwater Research abstracts

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Biochemical-genetic identification of northern bluefin tuna Thunnus thynnus in the New Zealand fishery

P. J. SMITH
A. M. CONROY
P. R. TAYLOR

Fisheries Research Centre
MAF Fisheries
P. O. Box 297
Wellington, New Zealand

Abstract  Muscle samples were collected from southern bluefin tuna Thunnus maccoyii off New Zealand, from northern bluefin tuna T. thynnus off Japan, and from specimens recorded as northern bluefin tuna off New Zealand. Electrophoretic analyses of muscle tissues from T. thynnus and T. maccoyii found 2 out of 33 enzyme loci with species-specific gel phenotypes. These two markers were used to identify specimens recorded as "northern" bluefin tuna in the New Zealand fishery. Only two out of 17 "northern" specimens were T. thynnus.

Keywords  bluefin tuna, Thunnus maccoyii, T. thynnus, electrophoresis

PDF file of entire paper: medium quality (1344K); (scanned from paper original: notes about this process)

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