Antarctic Science



Papers—Life Sciences and Oceanography

Mitochondrial DNA variation of Champsocephalus gunnari Lönnberg (Pisces: Channichthyidae) stocks on the Kerguelen Plateau, southern Indian Ocean


R. Williams a1c1, A. J. Smolenski a2p1 and R. W. G. White a2
a1 Antarctic Division, Channel Highway, Kingston, Tasmania, Australia 7050
a2 Fish Research Group, Department of Zoology, University of Tasmania, GPO Box 252C, Hobart, Tasmania, Australia 7001

Article author query
williams r   [PubMed][Google Scholar] 
smolenski a   [PubMed][Google Scholar] 
white r   [PubMed][Google Scholar] 

Abstract

The distribution of the icefish Champsocephalus gunnari on the Kerguelen Plateau is confined to the inner shelves of Heard and Kerguelen islands and outlying banks where the water depth is less than 350 m. For fisheries management purposes, it is necessary to know whether fish from the various shelves and banks belong to one single or several separate populations. Analysis of the mitochondrial DNA of fish from various localities using restriction endonclease enzymes revealed no significant genetic heterogeneity between any of the localities. This does not preclude the existence of isolated stocks at the present time but indicates that the populations have been separated too recently for genetic isolation to be manifested, or that low-level interchange of fish between the populations may be maintaining genetic homogeneity.

(Received January 10 1994)
(Accepted May 20 1994)


Key Words: Champsocephalus gunnari; icefish; Kerguelen Plateau; mitochondrial DNA.

Correspondence:
c1 To whom reprint requests should be sent.
p1 Present address: Department of Genetics and Human Variation, La Trobe University, Bundoora, Victoria, Australia 3083


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