Marine Biology

, Volume 125, Issue 4, pp 783–793 | Cite as

Genetically isolated stocks of orange roughy (Hoplostethus atlanticus), but not of hoki (Macruronus novaezelandiae), in the Tasman Sea and Southwest Pacific Ocean around New Zealand

  • P. J. Smith
  • S. M. McVeagh
  • A. Ede
Article

Abstract

Restriction fragment-length polymorphisms of mitochondrial (mt) DNA, generated by six-base restriction enzymes, were used to examine the stock structure of the two major commercial species in New Zealand fisheries, orange roughy (Hoplostethus atlanticus Collett) and hoki (Macruronus novaezelandiae Hector). Samples of orange roughy from six spawning sites around New Zealand and one site off Tasmania show significant genetic heterogeneity. Samples from two sites around the south of New Zealand were genetically similar to each other, but dissimilar to samples from all other sites. The common haplotype observed in northern sites was absent from the two southern sites. Low numbers of unique haplotypes were restricted to the Challenger Plateau in the Tasman Sea. There was no significant genetic heterogeneity in five samples of hoki from two spawning sites off New Zealand and one site off Tasmania.

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • P. J. Smith
    • 1
  • S. M. McVeagh
    • 1
  • A. Ede
    • 1
  1. 1.Fisheries ResearchNational Institute of Water and Atmospheric ResearchWellingtonNew Zealand

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