Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees

Farmed escapees may threaten the genetic integrity of native salmon populations through interbreeding. However, introgression requires survival until maturation, successful reproduction and successful early development. These traits are often compromised in domesticated animals selected for high per...

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Autores principales:	M Heino, T Svåsand, V Wennevik, KA Glover
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/7e93e99bc99a4fe99e3f00cf9cdf7edf
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spelling	oai:doaj.org-article:7e93e99bc99a4fe99e3f00cf9cdf7edf2021-11-16T10:31:13ZGenetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees1869-215X1869-753410.3354/aei00126https://doaj.org/article/7e93e99bc99a4fe99e3f00cf9cdf7edf2015-02-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v6/n2/p185-190/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534Farmed escapees may threaten the genetic integrity of native salmon populations through interbreeding. However, introgression requires survival until maturation, successful reproduction and successful early development. These traits are often compromised in domesticated animals selected for high performance in captivity. This makes it difficult to predict introgression levels in native populations. A recent study estimated genetic introgression of farmed escaped Atlantic salmon Salmo salar in 20 Norwegian rivers and found highly population-specific levels of introgression. The underlying causes of these patterns, however, remain unknown. Here, using a modeling approach on empirical and demographic data, we demonstrated that a combination of the observed relative frequency of escaped farmed salmon and the average annual angling catch weights for rivers, provides a significantly better predictor for cumulative introgression of farmed salmon in wild populations than the frequency of farmed salmon alone. Our results suggest that the demography of the native population is a significant factor influencing the relative success of farmed salmon in the wild.M HeinoT SvåsandV WennevikKA GloverInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 6, Iss 2, Pp 185-190 (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 M Heino T Svåsand V Wennevik KA Glover Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
description	Farmed escapees may threaten the genetic integrity of native salmon populations through interbreeding. However, introgression requires survival until maturation, successful reproduction and successful early development. These traits are often compromised in domesticated animals selected for high performance in captivity. This makes it difficult to predict introgression levels in native populations. A recent study estimated genetic introgression of farmed escaped Atlantic salmon Salmo salar in 20 Norwegian rivers and found highly population-specific levels of introgression. The underlying causes of these patterns, however, remain unknown. Here, using a modeling approach on empirical and demographic data, we demonstrated that a combination of the observed relative frequency of escaped farmed salmon and the average annual angling catch weights for rivers, provides a significantly better predictor for cumulative introgression of farmed salmon in wild populations than the frequency of farmed salmon alone. Our results suggest that the demography of the native population is a significant factor influencing the relative success of farmed salmon in the wild.
format	article
author	M Heino T Svåsand V Wennevik KA Glover
author_facet	M Heino T Svåsand V Wennevik KA Glover
author_sort	M Heino
title	Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
title_short	Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
title_full	Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
title_fullStr	Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
title_full_unstemmed	Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
title_sort	genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/7e93e99bc99a4fe99e3f00cf9cdf7edf
work_keys_str_mv	AT mheino geneticintrogressionoffarmedsalmoninnativepopulationsquantifyingtherelativeinfluenceofpopulationsizeandfrequencyofescapees AT tsvasand geneticintrogressionoffarmedsalmoninnativepopulationsquantifyingtherelativeinfluenceofpopulationsizeandfrequencyofescapees AT vwennevik geneticintrogressionoffarmedsalmoninnativepopulationsquantifyingtherelativeinfluenceofpopulationsizeandfrequencyofescapees AT kaglover geneticintrogressionoffarmedsalmoninnativepopulationsquantifyingtherelativeinfluenceofpopulationsizeandfrequencyofescapees
_version_	1718426557661315072

Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees

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