Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.

The extent to which stray, hatchery-reared salmon affect wild populations is much debated. Although experiments show that artificial breeding and culture influence the genetics of hatchery salmon, little is known about the interaction between hatchery and wild salmon in a natural setting. Here, we e...

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Autores principales:	James R Jasper, Christopher Habicht, Steve Moffitt, Rich Brenner, Jennifer Marsh, Bert Lewis, Elisabeth Creelman Fox, Zac Grauvogel, Serena D Rogers Olive, W Stewart Grant
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a42fb4a51add4de7b0964dcf6f105d1c
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spelling	oai:doaj.org-article:a42fb4a51add4de7b0964dcf6f105d1c2021-11-18T08:42:05ZSource-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.1932-620310.1371/journal.pone.0081916https://doaj.org/article/a42fb4a51add4de7b0964dcf6f105d1c2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24349150/?tool=EBIhttps://doaj.org/toc/1932-6203The extent to which stray, hatchery-reared salmon affect wild populations is much debated. Although experiments show that artificial breeding and culture influence the genetics of hatchery salmon, little is known about the interaction between hatchery and wild salmon in a natural setting. Here, we estimated historical and contemporary genetic population structures of chum salmon (Oncorhynchus keta) in Prince William Sound (PWS), Alaska, with 135 single nucleotide polymorphism (SNP) markers. Historical population structure was inferred from the analysis of DNA from fish scales, which had been archived since the late 1960's for several populations in PWS. Parallel analyses with microsatellites and a test based on Hardy-Weinberg proportions showed that about 50% of the fish-scale DNA was cross-contaminated with DNA from other fish. These samples were removed from the analysis. We used a novel application of the classical source-sink model to compare SNP allele frequencies in these archived fish-scales (1964-1982) with frequencies in contemporary samples (2008-2010) and found a temporal shift toward hatchery allele frequencies in some wild populations. Other populations showed markedly less introgression, despite moderate amounts of hatchery straying. The extent of introgression may reflect similarities in spawning time and life-history traits between hatchery and wild fish, or the degree that hybrids return to a natal spawning area. The source-sink model is a powerful means of detecting low levels of introgression over several generations.James R JasperChristopher HabichtSteve MoffittRich BrennerJennifer MarshBert LewisElisabeth Creelman FoxZac GrauvogelSerena D Rogers OliveW Stewart GrantPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 12, p e81916 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q James R Jasper Christopher Habicht Steve Moffitt Rich Brenner Jennifer Marsh Bert Lewis Elisabeth Creelman Fox Zac Grauvogel Serena D Rogers Olive W Stewart Grant Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.
description	The extent to which stray, hatchery-reared salmon affect wild populations is much debated. Although experiments show that artificial breeding and culture influence the genetics of hatchery salmon, little is known about the interaction between hatchery and wild salmon in a natural setting. Here, we estimated historical and contemporary genetic population structures of chum salmon (Oncorhynchus keta) in Prince William Sound (PWS), Alaska, with 135 single nucleotide polymorphism (SNP) markers. Historical population structure was inferred from the analysis of DNA from fish scales, which had been archived since the late 1960's for several populations in PWS. Parallel analyses with microsatellites and a test based on Hardy-Weinberg proportions showed that about 50% of the fish-scale DNA was cross-contaminated with DNA from other fish. These samples were removed from the analysis. We used a novel application of the classical source-sink model to compare SNP allele frequencies in these archived fish-scales (1964-1982) with frequencies in contemporary samples (2008-2010) and found a temporal shift toward hatchery allele frequencies in some wild populations. Other populations showed markedly less introgression, despite moderate amounts of hatchery straying. The extent of introgression may reflect similarities in spawning time and life-history traits between hatchery and wild fish, or the degree that hybrids return to a natal spawning area. The source-sink model is a powerful means of detecting low levels of introgression over several generations.
format	article
author	James R Jasper Christopher Habicht Steve Moffitt Rich Brenner Jennifer Marsh Bert Lewis Elisabeth Creelman Fox Zac Grauvogel Serena D Rogers Olive W Stewart Grant
author_facet	James R Jasper Christopher Habicht Steve Moffitt Rich Brenner Jennifer Marsh Bert Lewis Elisabeth Creelman Fox Zac Grauvogel Serena D Rogers Olive W Stewart Grant
author_sort	James R Jasper
title	Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.
title_short	Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.
title_full	Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.
title_fullStr	Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.
title_full_unstemmed	Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.
title_sort	source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in prince william sound, alaska.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/a42fb4a51add4de7b0964dcf6f105d1c
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Source-sink estimates of genetic introgression show influence of hatchery strays on wild chum salmon populations in Prince William Sound, Alaska.

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