Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions

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Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions. / Glover, K. A. ; Solberg, M. F.; Mcginnity, Philip; Hindar, K; Verspoor, Eric; Coulson, Mark; Hansen, M. M.; Araki, H.; Skaala, Ø.; Svåsand, T.

In: Fish and Fisheries, Vol. 18, No. 5, 30.09.2017, p. 890-927.

Research output: Contribution to journalArticle

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Glover, KA, Solberg, MF, Mcginnity, P, Hindar, K, Verspoor, E, Coulson, M, Hansen, MM, Araki, H, Skaala, Ø & Svåsand, T 2017, 'Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions' Fish and Fisheries, vol 18, no. 5, pp. 890-927. DOI: 10.1111/faf.12214

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Author

Glover, K. A. ; Solberg, M. F. ; Mcginnity, Philip ; Hindar, K ; Verspoor, Eric ; Coulson, Mark ; Hansen, M. M. ; Araki, H. ; Skaala, Ø. ; Svåsand, T./ Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions. In: Fish and Fisheries. 2017 ; Vol. 18, No. 5. pp. 890-927

Bibtex

@article{a50bf9873d8e470b8a73bcbfeb8daea3,
title = "Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions",
abstract = "Atlantic salmon (Salmo salar) is one of the best researched fishes, and its aquaculture plays a global role in the blue revolution. However, since the 1970\{textquoteleft}s, tens of millions of salmon have escaped into the wild. We review current knowledge of genetic interactions and identify the unanswered questions. Native salmon populations are typically genetically distinct from each other, and potentially locally adapted. Farmed salmon represent a limited number of wild source populations that have been exposed to ≥12 generations of domestication. Consequently, farmed and wild salmon differ in many traits including molecular-genetic polymorphisms, growth, morphology, life-history, behaviour, physiology and gene-transcription. Field-experiments have demonstrated that the offspring of farmed salmon display lower life-time fitness in the wild than wild salmon, and that following introgression, there is a reduced production of genetically wild salmon, and potentially, of total salmon production. It is a formidable task to estimate introgression of farmed salmon in wild populations where they are not exotic. New methods have revealed introgression in half of ~150 Norwegian populations, with point estimates as high as 47\{%}, and an unweighted average of 6.4\{%} across 109 populations. Outside Norway, introgression remains unquantified, and in all regions, biological changes and the mechanisms driving population-specific impacts remain poorly documented. Nevertheless, existing knowledge shows that the long-term consequences of introgression is expected to lead to changes in life-history traits, reduced population productivity, and decreased resilience to future challenges. Only a major reduction in the number of escapees, and/or sterility of farmed salmon can eliminate further impacts.",
keywords = "Aquaculture, Hybrid, Evolution, Fitness, Fish farming, Genetic",
author = "Glover, {K. A.} and Solberg, {M. F.} and Philip Mcginnity and K Hindar and Eric Verspoor and Mark Coulson and Hansen, {M. M.} and H. Araki and \{O}. Skaala and T. Sv\{aa}sand",
note = "\{circledC} 2017 The Authors. Fish and Fisheries Published by John Wiley & Sons Ltd.",
year = "2017",
month = "9",
day = "30",
doi = "10.1111/faf.12214",
language = "English",
volume = "18",
pages = "890--927",
journal = "Fish and Fisheries",
issn = "1467-2960",
publisher = "Wiley-Blackwell",
number = "5",

}

RIS

TY - JOUR

T1 - Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions

AU - Glover,K. A.

AU - Solberg,M. F.

AU - Mcginnity,Philip

AU - Hindar,K

AU - Verspoor,Eric

AU - Coulson,Mark

AU - Hansen,M. M.

AU - Araki,H.

AU - Skaala, Ø.

AU - Svåsand,T.

N1 - © 2017 The Authors. Fish and Fisheries Published by John Wiley & Sons Ltd.

PY - 2017/9/30

Y1 - 2017/9/30

N2 - Atlantic salmon (Salmo salar) is one of the best researched fishes, and its aquaculture plays a global role in the blue revolution. However, since the 1970's, tens of millions of salmon have escaped into the wild. We review current knowledge of genetic interactions and identify the unanswered questions. Native salmon populations are typically genetically distinct from each other, and potentially locally adapted. Farmed salmon represent a limited number of wild source populations that have been exposed to ≥12 generations of domestication. Consequently, farmed and wild salmon differ in many traits including molecular-genetic polymorphisms, growth, morphology, life-history, behaviour, physiology and gene-transcription. Field-experiments have demonstrated that the offspring of farmed salmon display lower life-time fitness in the wild than wild salmon, and that following introgression, there is a reduced production of genetically wild salmon, and potentially, of total salmon production. It is a formidable task to estimate introgression of farmed salmon in wild populations where they are not exotic. New methods have revealed introgression in half of ~150 Norwegian populations, with point estimates as high as 47%, and an unweighted average of 6.4% across 109 populations. Outside Norway, introgression remains unquantified, and in all regions, biological changes and the mechanisms driving population-specific impacts remain poorly documented. Nevertheless, existing knowledge shows that the long-term consequences of introgression is expected to lead to changes in life-history traits, reduced population productivity, and decreased resilience to future challenges. Only a major reduction in the number of escapees, and/or sterility of farmed salmon can eliminate further impacts.

AB - Atlantic salmon (Salmo salar) is one of the best researched fishes, and its aquaculture plays a global role in the blue revolution. However, since the 1970's, tens of millions of salmon have escaped into the wild. We review current knowledge of genetic interactions and identify the unanswered questions. Native salmon populations are typically genetically distinct from each other, and potentially locally adapted. Farmed salmon represent a limited number of wild source populations that have been exposed to ≥12 generations of domestication. Consequently, farmed and wild salmon differ in many traits including molecular-genetic polymorphisms, growth, morphology, life-history, behaviour, physiology and gene-transcription. Field-experiments have demonstrated that the offspring of farmed salmon display lower life-time fitness in the wild than wild salmon, and that following introgression, there is a reduced production of genetically wild salmon, and potentially, of total salmon production. It is a formidable task to estimate introgression of farmed salmon in wild populations where they are not exotic. New methods have revealed introgression in half of ~150 Norwegian populations, with point estimates as high as 47%, and an unweighted average of 6.4% across 109 populations. Outside Norway, introgression remains unquantified, and in all regions, biological changes and the mechanisms driving population-specific impacts remain poorly documented. Nevertheless, existing knowledge shows that the long-term consequences of introgression is expected to lead to changes in life-history traits, reduced population productivity, and decreased resilience to future challenges. Only a major reduction in the number of escapees, and/or sterility of farmed salmon can eliminate further impacts.

KW - Aquaculture

KW - Hybrid

KW - Evolution

KW - Fitness

KW - Fish farming

KW - Genetic

U2 - 10.1111/faf.12214

DO - 10.1111/faf.12214

M3 - Article

VL - 18

SP - 890

EP - 927

JO - Fish and Fisheries

T2 - Fish and Fisheries

JF - Fish and Fisheries

SN - 1467-2960

IS - 5

ER -

ID: 2057039