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

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 shelv...

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Bibliographic Details
Published in:Antarctic Science
Main Authors: Williams, R., Smolenski, A. J., White, R. W. G.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1994
Subjects:
Geology
Ecology, Evolution, Behavior and Systematics
Oceanography
Kerguelen
Kerguelen Islands
Indian
Antarctic Science
Icefish
Online Access:http://dx.doi.org/10.1017/s0954102094000520
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102094000520
Description
Summary: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.

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