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Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout

Sofia Consuegra, Nia Phillips, Gonzalo Gajardo, Carlos Garcia De Leaniz Orcid Logo, Sofia Consuegra del Olmo Orcid Logo

Evolutionary Applications, Volume: 4, Issue: 5, Pages: 660 - 671

Swansea University Authors: Carlos Garcia De Leaniz Orcid Logo, Sofia Consuegra del Olmo Orcid Logo

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DOI (Published version): 10.1111/j.1752-4571.2011.00189.x

Abstract

Aquaculture is a major source of invasive aquatic species, despite the fact that cultured organisms often have low genetic diversity and tend to be maladapted to survive in the wild. Yet, to what extent aquaculture escapees become established by means of high propagule pressure and multiple origins...

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Published in: Evolutionary Applications
Published: 2011
URI: https://cronfa.swan.ac.uk/Record/cronfa7567
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spelling 2016-09-07T14:50:18.2960208 v2 7567 2012-02-23 Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout 1c70acd0fd64edb0856b7cf34393ab02 0000-0003-1650-2729 Carlos Garcia De Leaniz Carlos Garcia De Leaniz true false 241f2810ab8f56be53ca8af23e384c6e 0000-0003-4403-2509 Sofia Consuegra del Olmo Sofia Consuegra del Olmo true false 2012-02-23 SBI Aquaculture is a major source of invasive aquatic species, despite the fact that cultured organisms often have low genetic diversity and tend to be maladapted to survive in the wild. Yet, to what extent aquaculture escapees become established by means of high propagule pressure and multiple origins is not clear. We analysed the genetic diversity of 15 established populations and four farmed stocks of non-native rainbow trout in Chile, a species first introduced for recreational fishing around 1900, but which has in recent decades escapedin large numbers from fish farms and become widespread. Aquaculture propagule pressure was a good predictor of the incidence of farm escapees, which represented 16% of all free-ranging rainbow trout and were present in 80% of the study rivers. Hybrids between farm escapes and established trout were present in all rivers at frequencies ranging between 7 and 69%, and population admixture was positively correlated with genetic diversity. We suggest that non-native salmonids introduced into the Southern Hemisphere could benefitfrom admixture because local adaptations may not have yet developed, and there may be initially little fitness loss resulting from outbreeding depression. Journal Article Evolutionary Applications 4 5 660 671 aquaculture, gene flow, genetic admixture, invasion, Oncorhynchus mykiss, propagule pressure 31 12 2011 2011-12-31 10.1111/j.1752-4571.2011.00189.x COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2016-09-07T14:50:18.2960208 2012-02-23T17:02:00.0000000 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Sofia Consuegra 1 Nia Phillips 2 Gonzalo Gajardo 3 Carlos Garcia De Leaniz 0000-0003-1650-2729 4 Sofia Consuegra del Olmo 0000-0003-4403-2509 5
title Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout
spellingShingle Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout
Carlos Garcia De Leaniz
Sofia Consuegra del Olmo
title_short Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout
title_full Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout
title_fullStr Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout
title_full_unstemmed Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout
title_sort Winning the invasion roulette: escapes from fish farms increase admixture and facilitate establishment of non-native rainbow trout
author_id_str_mv 1c70acd0fd64edb0856b7cf34393ab02
241f2810ab8f56be53ca8af23e384c6e
author_id_fullname_str_mv 1c70acd0fd64edb0856b7cf34393ab02_***_Carlos Garcia De Leaniz
241f2810ab8f56be53ca8af23e384c6e_***_Sofia Consuegra del Olmo
author Carlos Garcia De Leaniz
Sofia Consuegra del Olmo
author2 Sofia Consuegra
Nia Phillips
Gonzalo Gajardo
Carlos Garcia De Leaniz
Sofia Consuegra del Olmo
format Journal article
container_title Evolutionary Applications
container_volume 4
container_issue 5
container_start_page 660
publishDate 2011
institution Swansea University
doi_str_mv 10.1111/j.1752-4571.2011.00189.x
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 0
active_str 0
description Aquaculture is a major source of invasive aquatic species, despite the fact that cultured organisms often have low genetic diversity and tend to be maladapted to survive in the wild. Yet, to what extent aquaculture escapees become established by means of high propagule pressure and multiple origins is not clear. We analysed the genetic diversity of 15 established populations and four farmed stocks of non-native rainbow trout in Chile, a species first introduced for recreational fishing around 1900, but which has in recent decades escapedin large numbers from fish farms and become widespread. Aquaculture propagule pressure was a good predictor of the incidence of farm escapees, which represented 16% of all free-ranging rainbow trout and were present in 80% of the study rivers. Hybrids between farm escapes and established trout were present in all rivers at frequencies ranging between 7 and 69%, and population admixture was positively correlated with genetic diversity. We suggest that non-native salmonids introduced into the Southern Hemisphere could benefitfrom admixture because local adaptations may not have yet developed, and there may be initially little fitness loss resulting from outbreeding depression.
published_date 2011-12-31T03:09:25Z
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score 10.999524

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