Population structure of the thornback ray (Raja clavata L.) in British waters
Prior to the 1950s, thornback ray (Raja clavata L.) was common and widely distributed in the seas of Northwest Europe. Since then, it has decreased in abundance and geographic range due to over-fishing. The sustainability of ray populations is of concern to fisheries management because their slow gr...
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ftunivwagenin:oai:library.wur.nl:wurpubs/350456 2024-01-14T10:05:22+01:00 Population structure of the thornback ray (Raja clavata L.) in British waters Chevolot, M. Ellis, J.R. Hoarau, G. Rijnsdorp, A.D. Stam, W.T. Olsen, J.L. 2006 application/pdf https://research.wur.nl/en/publications/population-structure-of-the-thornback-ray-raja-clavata-l-in-briti https://doi.org/10.1016/j.seares.2006.05.005 en eng https://edepot.wur.nl/44671 https://research.wur.nl/en/publications/population-structure-of-the-thornback-ray-raja-clavata-l-in-briti doi:10.1016/j.seares.2006.05.005 info:eu-repo/semantics/restrictedAccess Wageningen University & Research Journal of Sea Research 56 (2006) 4 ISSN: 1385-1101 atlantic cod cod gadus-morhua genetic-structure geographic scales gulf-of-mexico microsatellite data multilocus genotypes pleuronectes-platessa l reaction norms southern north-sea info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2006 ftunivwagenin https://doi.org/10.1016/j.seares.2006.05.005 2023-12-20T23:19:47Z Prior to the 1950s, thornback ray (Raja clavata L.) was common and widely distributed in the seas of Northwest Europe. Since then, it has decreased in abundance and geographic range due to over-fishing. The sustainability of ray populations is of concern to fisheries management because their slow growth rate, late maturity and low fecundity make them susceptible to exploitation as victims of by-catch. We investigated the population genetic structure of thornback rays from 14 locations in the southern North Sea, English Channel and Irish Sea. Adults comprised <4% of the total sampling despite heavy sampling effort over 47 hauls; thus our results apply mainly to sexually immature individuals. Using five microsatellite loci, weak but significant population differentiation was detected with a global FST = 0.013 (P <0.001). Pairwise Fst was significant for 75 out of 171 comparisons. Although earlier tagging studies suggest restricted foraging distances from home areas, the absence of genetic differentiation between some distant populations suggests that a substantial fraction of individuals migrate over wide areas. Autumn/winter locations appear to have a lower level of differentiation than spring/summer, which could be due to seasonal migration. Management and conservation of thornback ray populations will be challenging as population structure appears to be dynamic in space and time Article in Journal/Newspaper atlantic cod Gadus morhua Wageningen UR (University & Research Centre): Digital Library Journal of Sea Research 56 4 305 316 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
atlantic cod cod gadus-morhua genetic-structure geographic scales gulf-of-mexico microsatellite data multilocus genotypes pleuronectes-platessa l reaction norms southern north-sea |
spellingShingle |
atlantic cod cod gadus-morhua genetic-structure geographic scales gulf-of-mexico microsatellite data multilocus genotypes pleuronectes-platessa l reaction norms southern north-sea Chevolot, M. Ellis, J.R. Hoarau, G. Rijnsdorp, A.D. Stam, W.T. Olsen, J.L. Population structure of the thornback ray (Raja clavata L.) in British waters |
topic_facet |
atlantic cod cod gadus-morhua genetic-structure geographic scales gulf-of-mexico microsatellite data multilocus genotypes pleuronectes-platessa l reaction norms southern north-sea |
description |
Prior to the 1950s, thornback ray (Raja clavata L.) was common and widely distributed in the seas of Northwest Europe. Since then, it has decreased in abundance and geographic range due to over-fishing. The sustainability of ray populations is of concern to fisheries management because their slow growth rate, late maturity and low fecundity make them susceptible to exploitation as victims of by-catch. We investigated the population genetic structure of thornback rays from 14 locations in the southern North Sea, English Channel and Irish Sea. Adults comprised <4% of the total sampling despite heavy sampling effort over 47 hauls; thus our results apply mainly to sexually immature individuals. Using five microsatellite loci, weak but significant population differentiation was detected with a global FST = 0.013 (P <0.001). Pairwise Fst was significant for 75 out of 171 comparisons. Although earlier tagging studies suggest restricted foraging distances from home areas, the absence of genetic differentiation between some distant populations suggests that a substantial fraction of individuals migrate over wide areas. Autumn/winter locations appear to have a lower level of differentiation than spring/summer, which could be due to seasonal migration. Management and conservation of thornback ray populations will be challenging as population structure appears to be dynamic in space and time |
format |
Article in Journal/Newspaper |
author |
Chevolot, M. Ellis, J.R. Hoarau, G. Rijnsdorp, A.D. Stam, W.T. Olsen, J.L. |
author_facet |
Chevolot, M. Ellis, J.R. Hoarau, G. Rijnsdorp, A.D. Stam, W.T. Olsen, J.L. |
author_sort |
Chevolot, M. |
title |
Population structure of the thornback ray (Raja clavata L.) in British waters |
title_short |
Population structure of the thornback ray (Raja clavata L.) in British waters |
title_full |
Population structure of the thornback ray (Raja clavata L.) in British waters |
title_fullStr |
Population structure of the thornback ray (Raja clavata L.) in British waters |
title_full_unstemmed |
Population structure of the thornback ray (Raja clavata L.) in British waters |
title_sort |
population structure of the thornback ray (raja clavata l.) in british waters |
publishDate |
2006 |
url |
https://research.wur.nl/en/publications/population-structure-of-the-thornback-ray-raja-clavata-l-in-briti https://doi.org/10.1016/j.seares.2006.05.005 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Journal of Sea Research 56 (2006) 4 ISSN: 1385-1101 |
op_relation |
https://edepot.wur.nl/44671 https://research.wur.nl/en/publications/population-structure-of-the-thornback-ray-raja-clavata-l-in-briti doi:10.1016/j.seares.2006.05.005 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1016/j.seares.2006.05.005 |
container_title |
Journal of Sea Research |
container_volume |
56 |
container_issue |
4 |
container_start_page |
305 |
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316 |
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