Restricted gene flow and evolutionary divergence between geographically separated populations of the Antarctic octopus Pareledone turqueti

Samples of the Antarctic octopus Pareledone turqueti were taken from three locations on the Scotia Ridge in the Southern Ocean. The genetic homogeneity of these populations was investigated using isozyme electrophoresis. Whilst panmixia appeared to be maintained around South Georgia (F ST = 0) gene...

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Bibliographic Details
Published in:Marine Biology
Main Authors: Allcock, A. L., Brierley, A. S., Thorpe, J. P., Rodhouse, P. G.
Format: Article in Journal/Newspaper
Language:English
Published: Springer 1997
Subjects:
Antarctic
Shag Rocks
Southern Ocean
The Antarctic
Antarc*
Antarctic Octopus
Antarctica
Online Access:https://oceanrep.geomar.de/id/eprint/52383/
https://oceanrep.geomar.de/id/eprint/52383/1/3309.pdf
https://doi.org/10.1007/s002270050150
Description
Summary:Samples of the Antarctic octopus Pareledone turqueti were taken from three locations on the Scotia Ridge in the Southern Ocean. The genetic homogeneity of these populations was investigated using isozyme electrophoresis. Whilst panmixia appeared to be maintained around South Georgia (F ST = 0) gene flow between this island and Shag Rocks, an island only 150 km away but separated by great depths, was extremely limited (F ST = 0.74). These results are examined with respect to the discontinuous distribution of P. turqueti throughout Antarctica. An estimate of effective population size was also calculated (N e = 3600).

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