Description
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
Data Records
The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 162 records.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
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)
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is SCAR - AntOBIS. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: 7b5e800e-f762-11e1-a439-00145eb45e9a. SCAR - AntOBIS publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Ocean Biodiversity Information System.
Keywords
Drifters; Population genetics; Occurrence
External data
The resource data is also available in other formats
| Online dataset | http://www.iobis.org/mapper/?dataset=1590 US-ASCII Plain Text |
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| Metadata | http://www.vliz.be/imis/imis.php?module=dataset&dasid=2001 UTF-8 XML |
Contacts
- Originator ●
- Point Of Contact
- Metadata Provider
Geographic Coverage
Antarctica
| Bounding Coordinates | South West [-59, -44], North East [-58, -43] |
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Taxonomic Coverage
urn:lsid:marinespecies.org:taxname:11676
| Superclass | Pisces [Fish] |
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Additional Metadata
marine, harvested by iOBIS
| Alternative Identifiers | 7b5e800e-f762-11e1-a439-00145eb45e9a |
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| https://ipt.biodiversity.aq/resource?r=rachel_gobionotothen_gibberifrons |