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Enzyme variation in south-eastern Australian samples of the blue-eye or deepsea trevalla, Hyperoglyphe antarctica Carmichael 1818 (Teleostei : Stromateoidei)

journal contribution
posted on 2023-05-18, 22:10 authored by Christopher BolchChristopher Bolch, Elliott, NG, Ward, RD
Six samples (n =67 to 154) of blue-eye or deepsea trevalla were collected from south-eastern Australia (seamounts off New South Wales, a seamount south-east of Tasmania called the Cascade Plateau, off the east, south and west coasts of Tasmania, and off the coast of South Australia). All fish were analysed by starch or cellulose acetate electrophoresis for the products of seven polymorphic loci (defined in this study as those with an average heterozygosity greater than 0.06); a minimum of 24 fish per area were also analysed for 29 other less variable loci. The average heterozygosity per locus was 5.3%. Polymorphic loci showed no significant deviations from Hardy-Weinberg equilibrium. The coefficient of genetic subpopulation differentiation, GST, was 0.38%. Bootstrapping procedures showed that this low value could be attributed to sampling error alone. Contingency Χ2 analysis similarly failed to reveal any significant inter-sample differentiation for any locus. The results indicate that gene flow is sufficient to prevent any genetic differentiation among the sampled localities. During the course of the study a second trevalla species, Schedophilus labyrinthicus, was identified in the New South Wales component of the fishery.

History

Publication title

Australian Journal of Marine and Freshwater Research

Volume

44

Issue

5

Pagination

687-697

ISSN

0067-1940

Department/School

Institute for Marine and Antarctic Studies

Place of publication

Australia

Rights statement

Copyright 1993 CSIRO

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - aquaculture not elsewhere classified

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