Antarctic fish Gobionotothen gibberifrons
最新版本 由 SCAR - AntOBIS 發佈於 2019年3月19日 SCAR - AntOBIS

The diversification of the teleost suborder Notothenioidei (Perciformes) in Antarctic waters provides one of the most striking examples of a marine adaptive radiation. Along with a number of adaptations to the cold environment, such as the evolution of antifreeze glycoproteins, notothenioids diversified into eight families and at least 130 species. Here, we investigate the genetic population structure of the humped rockcod (Gobionotothen gibberifrons), a benthic notothenioid fish. Six populations were sampled at different locations around the Scotia Sea, comprising a large part of the species’ distribution range (N = 165). Our analyses based on mitochondrial DNA sequence data (352 bp) and eight microsatellite markers reveal a lack of genetic structuring over large geographic distances (¦ST £ 0.058, FST £ 0.005, P values nonsignificant). In order to test whether this was due to passive larval dispersal, we used GPS-tracked drifter trajectories, which approximate movement of passive surface particles with ocean currents. The drifter data indicate that the Antarctic Circumpolar Current (ACC) connects the sampling locations in one direction only (west–east), and that passive transport is possible within the 4-month larval period of G. gibberifrons. Indeed, when applying the isolation-with-migration model in IMA, strong unidirectional west-east migration rates are detected in the humped rockcod. This leads us to conclude that, in G. gibberifrons, genetic differentiation is prevented by gene flow via larval dispersal with the ACC. Keywords: adaptive radiation, population genetics, isolation-with-migration model, drifters

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研究者應依照以下指示引用此資源。:

Matschiner,M., Hanel,R. and Salzburger,W. Gene flow by larval dispersal in the Antarctic notothenioid fish Gobionotothen gibberifrons Mol. Ecol. 18 (12), 2574-2587 (2009)

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GBIF 註冊

此資源已向GBIF註冊,並指定以下之GBIF UUID: 7b5e800e-f762-11e1-a439-00145eb45e9a。  SCAR - AntOBIS 發佈此資源,並經由Ocean Biodiversity Information System同意向GBIF註冊成為資料發佈者。

關鍵字

Drifters; Population genetics; Occurrence

外部資料

此資源尚有其他格式可用

聯絡資訊

資源建立者:

Rachel Grant

可回覆此資源相關問題者:

Rachel Grant

元數據填寫者:

Anton Van de Putte
Antarctic Biodiversity Information Facility (ANTABIF)
http://data.biodiversity.aq
地理涵蓋範圍

Antarctica

界定座標範圍 緯度南界 經度西界 [-59, -44], 緯度北界 經度東界 [-58, -43]
分類群涵蓋範圍

urn:lsid:marinespecies.org:taxname:11676

Superclass  Pisces [Fish]
額外的元數據

marine, harvested by iOBIS

替代的識別碼 7b5e800e-f762-11e1-a439-00145eb45e9a
https://ipt.biodiversity.aq/resource?r=rachel_gobionotothen_gibberifrons