Figure_1.tif (2.7 MB)

Genetic distance between Arctic and Antarctic Limacina helicina.

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posted on 2013-02-21, 02:04 authored by Brian Hunt, Jan Strugnell, Nina Bednarsek, Katrin Linse, R. John Nelson, Evgeny Pakhomov, Brad Seibel, Dirk Steinke, Laura Würzberg

a. L. helicina antarctica from the Lazarev Sea, Antarctic (photo: R. Giesecke); b. Bayesian tree depicting the phylogenetic relationships of pteropod molluscs. The genetic distance between cytochrome c oxidase subunit I (COI) gene sequences of L. helicina individuals was 0.15±0.06% and 0.60±0.07% within the Arctic (L. helicina helicina forma helicina) and Antarctic (L. helicina antarctica) respectively, but 33.56±0.09% between poles. Support is indicated as posterior probabilities above nodes (* indicate 1.0 support) and bootstraps from a maximum likelihood analysis below (* indicate 100% support). The scale bar represents substitutions per site. GQ861824 and GQ861825 from the Amundsen Sea; GQ861831, GQ861832 and GU732830 from the vicinity of South Georgia; GQ861826/27/28/30 from the Beaufort Sea; AY22739 and AY227378 from [12].