Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea
The overexploitation of the marine resources and the increasing fishing efforts, together with a non specialised fishery are anthropogenic factors that may allow to the population decline and local extinction of elasmobranch species. In the last few years, the monitoring of the marine fishery resour...
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ftunibolognairis:oai:cris.unibo.it:11585/25759 2024-01-28T10:07:56+01:00 Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea C. Ragazzini F. Hemida C. Mancusi M. Chevolot PASOLINI, PAOLA TINTI, FAUSTO C. Ragazzini P. Pasolini F. Hemida C. Mancusi M. Chevolot F. Tinti 2005 STAMPA http://hdl.handle.net/11585/25759 eng eng Oceanographic Museum of Monaco country:MCO place:MONACO ispartofbook:Book of Abstracts 9th Meeting of the European Elasmobranch Association firstpage:C12 lastpage:C12 http://hdl.handle.net/11585/25759 info:eu-repo/semantics/conferenceObject 2005 ftunibolognairis 2024-01-03T17:38:23Z The overexploitation of the marine resources and the increasing fishing efforts, together with a non specialised fishery are anthropogenic factors that may allow to the population decline and local extinction of elasmobranch species. In the last few years, the monitoring of the marine fishery resources, once based only on studies of parameters, was enhanced by integrating genetic analysis with the traditional morphological and bio-ecological studies. Such a multidisciplinary approach may contribute significantly to the inventorying and to the conservation of biodiversity. The thornback ray Raja clavata is one of the most common species in the Mediterranean Sea and North-East Atlantic and has a high morphological variability, with several documented morphotypes. Its intraspecific variability was recently investigated using microsatellites nuclear markers which revealed a significant population structure in Southern England waters. We have investigated the population structure of Raja clavata in the Mediterranean and North East Atlantic throughout the genetic stock structure analysis of more than 200 individuals collected from different geographical areas: Celtic Sea and North Sea (North-East Atlantic), and Adriatic Sea, Tyrrenian Sea, coasts of Algeria and Turkey (Mediterranean Sea). The genetic variation of samples analysis was carried out through PCR amplification and sequencing of the hyper-variable region D-loop of the mitochondrial DNA. The statistical analysis of molecular variation showed a high polymorphism within and among geographical samples as well as significant genetic differences between samples of the Mediterranean and the Atlantic, except for the Turkish sample that unexpectedly showed an higher Dloop variability and genetic similarity with samples of the Celtic and North Seas Conference Object North East Atlantic IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
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IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
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language |
English |
description |
The overexploitation of the marine resources and the increasing fishing efforts, together with a non specialised fishery are anthropogenic factors that may allow to the population decline and local extinction of elasmobranch species. In the last few years, the monitoring of the marine fishery resources, once based only on studies of parameters, was enhanced by integrating genetic analysis with the traditional morphological and bio-ecological studies. Such a multidisciplinary approach may contribute significantly to the inventorying and to the conservation of biodiversity. The thornback ray Raja clavata is one of the most common species in the Mediterranean Sea and North-East Atlantic and has a high morphological variability, with several documented morphotypes. Its intraspecific variability was recently investigated using microsatellites nuclear markers which revealed a significant population structure in Southern England waters. We have investigated the population structure of Raja clavata in the Mediterranean and North East Atlantic throughout the genetic stock structure analysis of more than 200 individuals collected from different geographical areas: Celtic Sea and North Sea (North-East Atlantic), and Adriatic Sea, Tyrrenian Sea, coasts of Algeria and Turkey (Mediterranean Sea). The genetic variation of samples analysis was carried out through PCR amplification and sequencing of the hyper-variable region D-loop of the mitochondrial DNA. The statistical analysis of molecular variation showed a high polymorphism within and among geographical samples as well as significant genetic differences between samples of the Mediterranean and the Atlantic, except for the Turkish sample that unexpectedly showed an higher Dloop variability and genetic similarity with samples of the Celtic and North Seas |
author2 |
C. Ragazzini P. Pasolini F. Hemida C. Mancusi M. Chevolot F. Tinti |
format |
Conference Object |
author |
C. Ragazzini F. Hemida C. Mancusi M. Chevolot PASOLINI, PAOLA TINTI, FAUSTO |
spellingShingle |
C. Ragazzini F. Hemida C. Mancusi M. Chevolot PASOLINI, PAOLA TINTI, FAUSTO Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea |
author_facet |
C. Ragazzini F. Hemida C. Mancusi M. Chevolot PASOLINI, PAOLA TINTI, FAUSTO |
author_sort |
C. Ragazzini |
title |
Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea |
title_short |
Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea |
title_full |
Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea |
title_fullStr |
Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea |
title_full_unstemmed |
Genetic variability and population structure of the thornback ray, Raja clavata, in north-east Atlantic and Mediterranean Sea |
title_sort |
genetic variability and population structure of the thornback ray, raja clavata, in north-east atlantic and mediterranean sea |
publisher |
Oceanographic Museum of Monaco |
publishDate |
2005 |
url |
http://hdl.handle.net/11585/25759 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
ispartofbook:Book of Abstracts 9th Meeting of the European Elasmobranch Association firstpage:C12 lastpage:C12 http://hdl.handle.net/11585/25759 |
_version_ |
1789336179948126208 |