Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain

The European carpet shell Ruditapes decussatus is among the most important shellfish species cultured in estuaries and bays of the northern Iberian Peninsula. Increased demand and overfishing of native R. decussatus, as well as irregular yields due in part to pollution and urban sprawl, have led to...

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Autores principales:	BT Habtemariam, A Arias, E García-Vázquez, YJ Borrell
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2015
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/a01a5e7d49b848808387516d995d80d1
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spelling	oai:doaj.org-article:a01a5e7d49b848808387516d995d80d12021-11-16T10:32:13ZImpacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain1869-215X1869-753410.3354/aei00128https://doaj.org/article/a01a5e7d49b848808387516d995d80d12015-04-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v6/n3/p241-254/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534The European carpet shell Ruditapes decussatus is among the most important shellfish species cultured in estuaries and bays of the northern Iberian Peninsula. Increased demand and overfishing of native R. decussatus, as well as irregular yields due in part to pollution and urban sprawl, have led to overexploitation of the species and to the import of the non-indigenous R. philippinarum in the early 1980s. In recent years, supplementation aquaculture of R. decussatus (supportive breeding) has been implemented as a management tool to recover the exhausted native carpet shell populations in Asturias, northern Spain. In this study, taxonomic analysis and a suite of genetic markers (ITS2, 5SrDNA, and mtCOI) were employed to assess the genetic composition of R. decussatus in 2 estuaries of the region, Ría del Eo and Ría de Villaviciosa. Our results revealed species misidentification and evidenced genetic introgression from the non-indigenous R. philippinarum into wild R. decussatus samples (4.2%), as well as in the aquaculture seed used for population supplementation (2.0%). Furthermore, we found significant genetic differentiation (FST = 0.03750, p < 0.0001) between wild populations and aquaculture seed, while the adults of both estuaries were genetically homogeneous (p > 0.05). Several actions are strongly recommended to prevent inadvertent introduction of non-indigenous genomes and other genetic erosive processes on native species in the region: (1) banning releases of the alien species R. philippinarum, (2) developing diagnostic tests for detection of hybrids in captive breeding programs, and (3) assessing the conservation status of wild R. decussatus populations.BT HabtemariamA AriasE García-VázquezYJ BorrellInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 6, Iss 3, Pp 241-254 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
spellingShingle	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 BT Habtemariam A Arias E García-Vázquez YJ Borrell Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain
description	The European carpet shell Ruditapes decussatus is among the most important shellfish species cultured in estuaries and bays of the northern Iberian Peninsula. Increased demand and overfishing of native R. decussatus, as well as irregular yields due in part to pollution and urban sprawl, have led to overexploitation of the species and to the import of the non-indigenous R. philippinarum in the early 1980s. In recent years, supplementation aquaculture of R. decussatus (supportive breeding) has been implemented as a management tool to recover the exhausted native carpet shell populations in Asturias, northern Spain. In this study, taxonomic analysis and a suite of genetic markers (ITS2, 5SrDNA, and mtCOI) were employed to assess the genetic composition of R. decussatus in 2 estuaries of the region, Ría del Eo and Ría de Villaviciosa. Our results revealed species misidentification and evidenced genetic introgression from the non-indigenous R. philippinarum into wild R. decussatus samples (4.2%), as well as in the aquaculture seed used for population supplementation (2.0%). Furthermore, we found significant genetic differentiation (FST = 0.03750, p < 0.0001) between wild populations and aquaculture seed, while the adults of both estuaries were genetically homogeneous (p > 0.05). Several actions are strongly recommended to prevent inadvertent introduction of non-indigenous genomes and other genetic erosive processes on native species in the region: (1) banning releases of the alien species R. philippinarum, (2) developing diagnostic tests for detection of hybrids in captive breeding programs, and (3) assessing the conservation status of wild R. decussatus populations.
format	article
author	BT Habtemariam A Arias E García-Vázquez YJ Borrell
author_facet	BT Habtemariam A Arias E García-Vázquez YJ Borrell
author_sort	BT Habtemariam
title	Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain
title_short	Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain
title_full	Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain
title_fullStr	Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain
title_full_unstemmed	Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain
title_sort	impacts of supplementation aquaculture on the genetic diversity of wild ruditapes decussatus from northern spain
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/a01a5e7d49b848808387516d995d80d1
work_keys_str_mv	AT bthabtemariam impactsofsupplementationaquacultureonthegeneticdiversityofwildruditapesdecussatusfromnorthernspain AT aarias impactsofsupplementationaquacultureonthegeneticdiversityofwildruditapesdecussatusfromnorthernspain AT egarciavazquez impactsofsupplementationaquacultureonthegeneticdiversityofwildruditapesdecussatusfromnorthernspain AT yjborrell impactsofsupplementationaquacultureonthegeneticdiversityofwildruditapesdecussatusfromnorthernspain
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Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain

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