New Zealand Journal of Marine and Freshwater Research abstracts

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Allozyme and mitochondrial DNA variation in three species of oreos (Teleostei: Oreosomatidae) from Australasian waters

R. D. WARD
N.G. ELLIOTT
P. M. GREWE
P. R. LAST
P. S. LOWRY
B. H. INNES
G. K. YEARSLEY

CSIRO Division of Marine Research
GPO Box 1538
Hobart, Tasmania 7001
Australia

Abstract  Collections of three species of oreos (smooth oreo, Pseudocyttus maculatus; black oreo, Allocyttus niger; and warty oreo, A. verrucosus) from Australasian waters were examined for genetic variation. Allozyme heterozygosity was high in each species (25-29 loci: mean heterozygosity per locus per sample ranging from 0.100 to 0.148), but mitochondrial DNA variation was less extensive (10 six-base restriction enzymes: nucleotide diversity ranging from 0.0012 to 0.0021). Collections of smooth oreos from Western Australia, Tasmania, and New Zealand did not permit the null hypothesis of a single stock to be confidently rejected. Black oreos from Tasmania and New Zealand were provisionally identified as separate stocks. Warty oreos from Tasmania were provisionally identified as separate from a Western Australia/New South Wales stock.

Keywords  oreo; genetic variation; heterozygosity; mtDNA haplotypes; gene flow; Tasman Sea

M97041
Received 8 August 1997; accepted 4 December 1997



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