Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar

Many Atlantic salmon Salmo salar populations in Europe are threatened by previous stocking with foreign hatchery strains. Temporal patterns of genetic characteristics of salmon from northern Spain, the southernmost European populations, were compared before and after species decline and heavy stocki...

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Autores: Almodóvar Pérez, Ana María, Leal García, María Shaila, Gómez Nicola, María Gracia, Hórreo Escandón, José Luis, García Vázquez, Eva, Elvira Payán, Benigno
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/128852
Acceso en línea:https://hdl.handle.net/20.500.14352/128852
Access Level:acceso abierto
Palabra clave:597.552.51
591.15
575.17
Conservation genetics
Effective population size
Foreign stocking
Genetic variability
Introgression
Population genetics
Salmonidae
Zoología
Peces
Genética
2401 Biología Animal (Zoología)
2401.08 Genética Animal
2409.03 Genética de Poblaciones
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oai_identifier_str oai:docta.ucm.es:20.500.14352/128852
network_acronym_str ES
network_name_str España
repository_id_str
spelling Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salarAlmodóvar Pérez, Ana MaríaLeal García, María ShailaGómez Nicola, María GraciaHórreo Escandón, José LuisGarcía Vázquez, EvaElvira Payán, Benigno597.552.51591.15575.17Conservation geneticsEffective population sizeForeign stockingGenetic variabilityIntrogressionPopulation geneticsSalmonidaeZoologíaPecesGenética2401 Biología Animal (Zoología)2401.08 Genética Animal2409.03 Genética de PoblacionesMany Atlantic salmon Salmo salar populations in Europe are threatened by previous stocking with foreign hatchery strains. Temporal patterns of genetic characteristics of salmon from northern Spain, the southernmost European populations, were compared before and after species decline and heavy stocking with specimens from northern Europe. Eleven microsatellite loci were analysed in archival (scales from 1958-1960) and contemporary (2007-2008) samples from the River Sella. Temporal analyses revealed a similar heterozygosity between archival and contemporary samples, despite a drastic decrease in population abundance, while the contemporary sample showed a higher allelic richness due to the occurrence of foreign alleles. Considering only the alleles with at least 4% frequency in the archival sample, 2 alleles exclusive to the River Sella were absent in the contemporary sample, and 14 alleles showed a decrease of at least 4% frequency. Four alleles common in Scotland showed a high occurrence in the contemporary sample, so they are good candidates as markers of introgression of foreign genes. The heavy stocking with non-native Scottish broodstocks between 1970 and 1990 caused the introgression found in the contemporary sample when compared with the pristine population. An abrupt decrease was evident when the estimates of effective number of breeders were adjusted to take into account overlapping generations (NbAdj), effective population size (NeAdj) estimated from NbAdj, and number of breeders estimated using the sibship assignment method (NbSIB). The very low effective size values found in the contemporary sample, together with the detrimental synergy between genetic drift and high rates of introgression, represent a severe risk for the conservation of native salmon.Inter-Research Science PublisherUniversidad Complutense de Madrid20202020-03-1220202020-03-12journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/128852reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016 CGL2012-36049%2FBOSopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1288522026-06-02T12:44:21Z
dc.title.none.fl_str_mv Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
title Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
spellingShingle Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
Almodóvar Pérez, Ana María
597.552.51
591.15
575.17
Conservation genetics
Effective population size
Foreign stocking
Genetic variability
Introgression
Population genetics
Salmonidae
Zoología
Peces
Genética
2401 Biología Animal (Zoología)
2401.08 Genética Animal
2409.03 Genética de Poblaciones
title_short Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
title_full Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
title_fullStr Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
title_full_unstemmed Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
title_sort Long-term stocking practices threaten the original genetic diversity of the southernmost European populations of Atlantic salmon Salmo salar
dc.creator.none.fl_str_mv Almodóvar Pérez, Ana María
Leal García, María Shaila
Gómez Nicola, María Gracia
Hórreo Escandón, José Luis
García Vázquez, Eva
Elvira Payán, Benigno
author Almodóvar Pérez, Ana María
author_facet Almodóvar Pérez, Ana María
Leal García, María Shaila
Gómez Nicola, María Gracia
Hórreo Escandón, José Luis
García Vázquez, Eva
Elvira Payán, Benigno
author_role author
author2 Leal García, María Shaila
Gómez Nicola, María Gracia
Hórreo Escandón, José Luis
García Vázquez, Eva
Elvira Payán, Benigno
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 597.552.51
591.15
575.17
Conservation genetics
Effective population size
Foreign stocking
Genetic variability
Introgression
Population genetics
Salmonidae
Zoología
Peces
Genética
2401 Biología Animal (Zoología)
2401.08 Genética Animal
2409.03 Genética de Poblaciones
topic 597.552.51
591.15
575.17
Conservation genetics
Effective population size
Foreign stocking
Genetic variability
Introgression
Population genetics
Salmonidae
Zoología
Peces
Genética
2401 Biología Animal (Zoología)
2401.08 Genética Animal
2409.03 Genética de Poblaciones
description Many Atlantic salmon Salmo salar populations in Europe are threatened by previous stocking with foreign hatchery strains. Temporal patterns of genetic characteristics of salmon from northern Spain, the southernmost European populations, were compared before and after species decline and heavy stocking with specimens from northern Europe. Eleven microsatellite loci were analysed in archival (scales from 1958-1960) and contemporary (2007-2008) samples from the River Sella. Temporal analyses revealed a similar heterozygosity between archival and contemporary samples, despite a drastic decrease in population abundance, while the contemporary sample showed a higher allelic richness due to the occurrence of foreign alleles. Considering only the alleles with at least 4% frequency in the archival sample, 2 alleles exclusive to the River Sella were absent in the contemporary sample, and 14 alleles showed a decrease of at least 4% frequency. Four alleles common in Scotland showed a high occurrence in the contemporary sample, so they are good candidates as markers of introgression of foreign genes. The heavy stocking with non-native Scottish broodstocks between 1970 and 1990 caused the introgression found in the contemporary sample when compared with the pristine population. An abrupt decrease was evident when the estimates of effective number of breeders were adjusted to take into account overlapping generations (NbAdj), effective population size (NeAdj) estimated from NbAdj, and number of breeders estimated using the sibship assignment method (NbSIB). The very low effective size values found in the contemporary sample, together with the detrimental synergy between genetic drift and high rates of introgression, represent a severe risk for the conservation of native salmon.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-03-12
2020
2020-03-12
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/128852
url https://hdl.handle.net/20.500.14352/128852
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016 CGL2012-36049%2FBOS
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Inter-Research Science Publisher
publisher.none.fl_str_mv Inter-Research Science Publisher
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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