Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod
Abstract Compared with many terrestrial and freshwater environments, dispersal and interbreeding is generally much less restricted in the marine environment. We studied the tendency for a marine species, the Atlantic cod, to be sub-structured into genetically differentiated populations on a fine geo...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1078.8854 2023-05-15T15:27:08+02:00 Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod H K N U T S E N † P E J O R D E C A N D R É ‡ N C R S T E N S E T H The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.8854 http://www.imr.no/Dokumenter/knutsen_et_al_2003.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.8854 http://www.imr.no/Dokumenter/knutsen_et_al_2003.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.imr.no/Dokumenter/knutsen_et_al_2003.pdf text 2003 ftciteseerx 2020-05-03T00:19:27Z Abstract Compared with many terrestrial and freshwater environments, dispersal and interbreeding is generally much less restricted in the marine environment. We studied the tendency for a marine species, the Atlantic cod, to be sub-structured into genetically differentiated populations on a fine geographical scale. We selected a coastal area free of any obvious physical barriers and restricted sampling to a 300-km region, well within the dispersal ability of this species. Screening 10 polymorphic microsatellite loci in 6 samples we detected a weak, but consistent, differentiation at all 10 loci. The average F ST over loci was small (0.0023) but highly significant statistically, demonstrating that genetically differentiated populations can arise and persist in the absence of physical barriers or great distance. We found no geographical pattern in the genetic differentiation and there was no apparent trend of isolation by distance along the coastline. These findings lend support to the notion that low levels of differentiation are due to passive transport of eggs or larvae by the ocean currents rather than to adult dispersal, the latter being strongly dependent on distance. Text atlantic cod Unknown |
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English |
description |
Abstract Compared with many terrestrial and freshwater environments, dispersal and interbreeding is generally much less restricted in the marine environment. We studied the tendency for a marine species, the Atlantic cod, to be sub-structured into genetically differentiated populations on a fine geographical scale. We selected a coastal area free of any obvious physical barriers and restricted sampling to a 300-km region, well within the dispersal ability of this species. Screening 10 polymorphic microsatellite loci in 6 samples we detected a weak, but consistent, differentiation at all 10 loci. The average F ST over loci was small (0.0023) but highly significant statistically, demonstrating that genetically differentiated populations can arise and persist in the absence of physical barriers or great distance. We found no geographical pattern in the genetic differentiation and there was no apparent trend of isolation by distance along the coastline. These findings lend support to the notion that low levels of differentiation are due to passive transport of eggs or larvae by the ocean currents rather than to adult dispersal, the latter being strongly dependent on distance. |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
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H K N U T S E N † P E J O R D E C A N D R É ‡ N C R S T E N S E T H |
spellingShingle |
H K N U T S E N † P E J O R D E C A N D R É ‡ N C R S T E N S E T H Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod |
author_facet |
H K N U T S E N † P E J O R D E C A N D R É ‡ N C R S T E N S E T H |
author_sort |
H K N U T S E N |
title |
Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod |
title_short |
Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod |
title_full |
Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod |
title_fullStr |
Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod |
title_full_unstemmed |
Fine-scaled geographical population structuring in a highly mobile marine species: the Atlantic cod |
title_sort |
fine-scaled geographical population structuring in a highly mobile marine species: the atlantic cod |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.8854 http://www.imr.no/Dokumenter/knutsen_et_al_2003.pdf |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
http://www.imr.no/Dokumenter/knutsen_et_al_2003.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1078.8854 http://www.imr.no/Dokumenter/knutsen_et_al_2003.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766357590233579520 |