IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ] Printer-friendly version

Antarctic fish Gobionotothen gibberifrons
Citation
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)

Access data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

Description
Data on the gene flow by larval dispersal in the Antarctic notothenioid fish Gobionotothen gibberifrons. more

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.

Scope
Themes:
Biology > Fish
Keywords:
Marine, Drifters, Population genetics, Antarctica, Pisces

Geographical coverage
Antarctica [Marine Regions]

Taxonomic coverage
Pisces [WoRMS]

Related datasets
Published in:
AntOBIS: Antarctic Ocean Biogeographic Information System, more

Publication
Based on this dataset:
Matschiner, M. et al. (2009). Gene flow by larval dispersal in the Antarctic notothenioid fish Gobionotothen gibberifrons. Mol. Ecol. 18(12): 2574–2587. hdl.handle.net/10.1111/j.1365-294X.2009.04220.x, more

Dataset status: Completed
Data type: Data
Data origin: Literature research
Metadatarecord created: 2009-06-23
Information last updated: 2009-06-23
All data in IMIS is subject to the VLIZ privacy policy