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Beyond hybridization: the genetic impacts of non-reproductive ecological interactions of salmon aquaculture on wild populations

Bradbury, I. R. and Burgetz, I and Coulson, M. W. and Verspoor, E. and Gilbey, J. and Lehnert, S. J. and Kess, T. and Cross, T. F. and Vasemägi, Anti and Solberg, M. F. and Fleming, I. A. and McGinnity, P. (2020). Beyond hybridization: the genetic impacts of non-reproductive ecological interactions of salmon aquaculture on wild populations. Aquaculture environment interactions. 12 , 429-445
[Article Review/Survey]

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Abstract

Cultured Atlantic salmon Salmo salar are of international socioeconomic value, and the process of domestication has resulted in significant behavioural, morphological, and allelic differences from wild populations. Substantial evidence indicates that direct genetic interactions or interbreeding between wild and escaped farmed Atlantic salmon occurs, genetically altering wild salmon and reducing population viability. However, genetic interactions may also occur through ecological mechanisms (e.g. disease, parasites, predation, competition), both in conjunction with and in the absence of interbreeding. Here we examine existing evidence for ecological and nonreproductive genetic interactions between domestic Atlantic salmon and wild populations and the potential use of genetic and genomic tools to resolve these impacts. Our review identified examples of genetic changes resulting from ecological processes, predominately through pathogen or parasite transmission. In addition, many examples were identified where aquaculture activities have either altered the selective landscape experienced by wild populations or resulted in reductions in population abundance, both of which are consistent with the widespread occurrence of indirect genetic changes. We further identify opportunities for genetic or genomic methods to quantify these impacts, though careful experimental design and pre-impact comparisons are often needed to accurately attribute genetic change to aquaculture activities. Our review indicates that ecological and non-reproductive genetic interactions are important, and further study is urgently needed to support an integrated understanding of aquaculture-ecosystem interactions, their implications for ecosystem stability, and the development of potential mitigation and management strategies.

Authors/Creators:Bradbury, I. R. and Burgetz, I and Coulson, M. W. and Verspoor, E. and Gilbey, J. and Lehnert, S. J. and Kess, T. and Cross, T. F. and Vasemägi, Anti and Solberg, M. F. and Fleming, I. A. and McGinnity, P.
Title:Beyond hybridization: the genetic impacts of non-reproductive ecological interactions of salmon aquaculture on wild populations
Series Name/Journal:Aquaculture environment interactions
Year of publishing :2020
Volume:12
Page range:429-445
Number of Pages:17
Publisher:INTER-RESEARCH
ISSN:1869-215X
Language:English
Publication Type:Article Review/Survey
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:Atlantic salmon, Aquaculture, Management, Genetic
URN:NBN:urn:nbn:se:slu:epsilon-p-109023
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109023
Additional ID:
Type of IDID
DOI10.3354/aei00376
Web of Science (WoS)000582600300001
ID Code:19105
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:03 Dec 2020 17:03
Metadata Last Modified:15 Jan 2021 19:19

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