Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus
Abstract Aim A lack of genetic structure is predicted for Antarctic fish due to the duration of pelagic larval stages and the strength of the currents in the Southern Ocean, particularly the Antarctic Circumpolar Current. In this study we explored the population structure of the ocellated icefish, C...
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crwiley:10.1111/j.1365-2699.2011.02682.x 2024-06-02T07:58:19+00:00 Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus Papetti, Chiara Pujolar, Jose Martin Mezzavilla, Massimo La Mesa, Mario Rock, Jennifer Zane, Lorenzo Patarnello, Tomaso 2012 http://dx.doi.org/10.1111/j.1365-2699.2011.02682.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2011.02682.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2011.02682.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 39, issue 7, page 1361-1372 ISSN 0305-0270 1365-2699 journal-article 2012 crwiley https://doi.org/10.1111/j.1365-2699.2011.02682.x 2024-05-03T11:17:29Z Abstract Aim A lack of genetic structure is predicted for Antarctic fish due to the duration of pelagic larval stages and the strength of the currents in the Southern Ocean, particularly the Antarctic Circumpolar Current. In this study we explored the population structure of the ocellated icefish, Chionodraco rastrospinosus , by means of analysing a total of 394 individuals collected at four geographical areas off the Antarctic Peninsula in the period 1996–2006. Location Elephant Island, southern South Shetlands, Joinville Island and South Orkneys in the Southern Ocean. Methods The spatio‐temporal genetic structure of Chionodraco rastrospinosus was explored using seven microsatellite loci. Existence and direction of gene flow across sampling locations were investigated using the isolation‐by‐migration procedure. Results Microsatellite data showed a lack of genetic structuring in the area studied, with no differences found at both the geographical or temporal level, and an eastward unidirectional gene flow among sites. This suggested a lack of genetic barriers for this species, attributable to larval dispersal following the Antarctic Circumpolar Current, which fits well with the predicted pattern for Antarctic fish. Re‐examination of genetic data of the closely related icefish Chaenocephalus aceratus , with similar larval duration but displaying genetically structured populations, indicated a weak but significant bidirectional gene flow. Main conclusions Our results point to a relationship that is more complex than expected between potential for dispersal and realized gene flow in the marine environment. In addition to ocean circulation and larval dispersal, other major life‐history traits might be driving connectivity, particularly larval retention. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Elephant Island Icefish Joinville Island Southern Ocean Wiley Online Library Antarctic Antarctic Peninsula Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) Joinville ENVELOPE(-55.867,-55.867,-63.250,-63.250) Joinville Island ENVELOPE(-55.667,-55.667,-63.350,-63.350) Southern Ocean The Antarctic Journal of Biogeography 39 7 1361 1372 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Aim A lack of genetic structure is predicted for Antarctic fish due to the duration of pelagic larval stages and the strength of the currents in the Southern Ocean, particularly the Antarctic Circumpolar Current. In this study we explored the population structure of the ocellated icefish, Chionodraco rastrospinosus , by means of analysing a total of 394 individuals collected at four geographical areas off the Antarctic Peninsula in the period 1996–2006. Location Elephant Island, southern South Shetlands, Joinville Island and South Orkneys in the Southern Ocean. Methods The spatio‐temporal genetic structure of Chionodraco rastrospinosus was explored using seven microsatellite loci. Existence and direction of gene flow across sampling locations were investigated using the isolation‐by‐migration procedure. Results Microsatellite data showed a lack of genetic structuring in the area studied, with no differences found at both the geographical or temporal level, and an eastward unidirectional gene flow among sites. This suggested a lack of genetic barriers for this species, attributable to larval dispersal following the Antarctic Circumpolar Current, which fits well with the predicted pattern for Antarctic fish. Re‐examination of genetic data of the closely related icefish Chaenocephalus aceratus , with similar larval duration but displaying genetically structured populations, indicated a weak but significant bidirectional gene flow. Main conclusions Our results point to a relationship that is more complex than expected between potential for dispersal and realized gene flow in the marine environment. In addition to ocean circulation and larval dispersal, other major life‐history traits might be driving connectivity, particularly larval retention. |
format |
Article in Journal/Newspaper |
author |
Papetti, Chiara Pujolar, Jose Martin Mezzavilla, Massimo La Mesa, Mario Rock, Jennifer Zane, Lorenzo Patarnello, Tomaso |
spellingShingle |
Papetti, Chiara Pujolar, Jose Martin Mezzavilla, Massimo La Mesa, Mario Rock, Jennifer Zane, Lorenzo Patarnello, Tomaso Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus |
author_facet |
Papetti, Chiara Pujolar, Jose Martin Mezzavilla, Massimo La Mesa, Mario Rock, Jennifer Zane, Lorenzo Patarnello, Tomaso |
author_sort |
Papetti, Chiara |
title |
Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus |
title_short |
Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus |
title_full |
Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus |
title_fullStr |
Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus |
title_full_unstemmed |
Population genetic structure and gene flow patterns between populations of the Antarctic icefish Chionodraco rastrospinosus |
title_sort |
population genetic structure and gene flow patterns between populations of the antarctic icefish chionodraco rastrospinosus |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1365-2699.2011.02682.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2011.02682.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2011.02682.x |
long_lat |
ENVELOPE(-55.184,-55.184,-61.085,-61.085) ENVELOPE(-55.867,-55.867,-63.250,-63.250) ENVELOPE(-55.667,-55.667,-63.350,-63.350) |
geographic |
Antarctic Antarctic Peninsula Elephant Island Joinville Joinville Island Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Elephant Island Joinville Joinville Island Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Elephant Island Icefish Joinville Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Elephant Island Icefish Joinville Island Southern Ocean |
op_source |
Journal of Biogeography volume 39, issue 7, page 1361-1372 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2699.2011.02682.x |
container_title |
Journal of Biogeography |
container_volume |
39 |
container_issue |
7 |
container_start_page |
1361 |
op_container_end_page |
1372 |
_version_ |
1800741633559363584 |