Restricted gene flow and evolutionary divergence between geographically separated populations of the Antarctic octopus Pareledone turqueti |
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| Authors: | A L Allcock A S Brierley J P Thorpe P G Rodhouse |
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| Institution: | (1) Department of Environmental and Evolutionary Biology, The University of Liverpool, Port Erin Marine Laboratory, Port Erin, Isle of Man IM9 6JA, British Isles,;(2) British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK, GB |
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| Abstract: | 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).
Received: 7 March 1997 / Accepted: 27 March 1997 |
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