Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout

De, Carlos Garcia; Minett, Jessica; Fowler, D. M.; H., J. A.; Brickle, P.; Crossin, G. T.; del, Sofia Consuegra

doi:10.1007/s10530-022-02959-4

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Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout

Carlos Garcia De Leaniz

, Jessica Minett, D. M. Fowler, J. A. H. Jones, P. Brickle, G. T. Crossin, Sofia Consuegra del Olmo

Biological Invasions, Volume: 25

Swansea University Authors: Carlos Garcia De Leaniz , Jessica Minett, Sofia Consuegra del Olmo

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DOI (Published version): 10.1007/s10530-022-02959-4

Abstract

Non-native salmonids are protected in the Southern hemisphere where they sustain aquaculture and lucrative sport fisheries, but also impact many native fishes, which poses a conservation conundrum. Legal protection and human-assisted secondary releases may have helped salmonids to spread, but this h...

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Published in:	Biological Invasions
ISSN:	1387-3547 1573-1464
Published:	Springer 2022
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa61825
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first_indexed	2022-11-09T09:23:39Z
last_indexed	2023-01-20T04:15:42Z
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spelling	v2 61825 2022-11-09 Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout 1c70acd0fd64edb0856b7cf34393ab02 0000-0003-1650-2729 Carlos Garcia De Leaniz Carlos Garcia De Leaniz true false 8e592c5576ea17cb28d83f8dc45bd932 Jessica Minett Jessica Minett true false 241f2810ab8f56be53ca8af23e384c6e 0000-0003-4403-2509 Sofia Consuegra del Olmo Sofia Consuegra del Olmo true false 2022-11-09 SBI Non-native salmonids are protected in the Southern hemisphere where they sustain aquaculture and lucrative sport fisheries, but also impact many native fishes, which poses a conservation conundrum. Legal protection and human-assisted secondary releases may have helped salmonids to spread, but this has seldom been tested. We reconstructed the introduction of brown trout (Salmo trutta) to the Falkland Islands using historical records and modelled its dispersal and probability of invasion using a generalized linear model and Leave One out Cross Validation. Our results indicate that establishment success was ~ 88%, and that dispersal was facilitated over land by proximity to invaded sites and density of stream-road crossings, suggesting it was human assisted. Brown trout have already invaded 54% of Falkland rivers, which are 2.9–4.5 times less likely to contain native galaxiids than uninvaded streams. Without strong containment we predict brown trout will invade nearly all suitable freshwater habitats in the Falklands within the next ~ 70 years, which might put native freshwater fishes at a high risk of extinction. Journal Article Biological Invasions 25 Springer 1387-3547 1573-1464 14 11 2022 2022-11-14 10.1007/s10530-022-02959-4 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University SU Library paid the OA fee (TA Institutional Deal) Funding from Fortuna Ltd. and Swansea University College of Science is gratefully acknowledged. 2023-06-12T16:37:50.0538482 2022-11-09T09:18:40.0453026 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Carlos Garcia De Leaniz 0000-0003-1650-2729 1 Jessica Minett 2 D. M. Fowler 3 J. A. H. Jones 4 P. Brickle 5 G. T. Crossin 6 Sofia Consuegra del Olmo 0000-0003-4403-2509 7 61825__25907__8065bee7e2c94fdd8d003dc0ca875fc5.pdf 61825.pdf 2022-11-25T10:36:45.2385767 Output 2068421 application/pdf Version of Record true This article is licensed under a Creative Commons Attribution 4.0 International License true eng http://creativecommons.org/licenses/by/4.0/ 142 true https://doi.org/10.6084/m9.figshare.14798340
title	Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout
spellingShingle	Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout Carlos Garcia De Leaniz Jessica Minett Sofia Consuegra del Olmo
title_short	Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout
title_full	Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout
title_fullStr	Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout
title_full_unstemmed	Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout
title_sort	Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout
author_id_str_mv	1c70acd0fd64edb0856b7cf34393ab02 8e592c5576ea17cb28d83f8dc45bd932 241f2810ab8f56be53ca8af23e384c6e
author_id_fullname_str_mv	1c70acd0fd64edb0856b7cf34393ab02_*_Carlos Garcia De Leaniz 8e592c5576ea17cb28d83f8dc45bd932__Jessica Minett 241f2810ab8f56be53ca8af23e384c6e_**_Sofia Consuegra del Olmo
author	Carlos Garcia De Leaniz Jessica Minett Sofia Consuegra del Olmo
author2	Carlos Garcia De Leaniz Jessica Minett D. M. Fowler J. A. H. Jones P. Brickle G. T. Crossin Sofia Consuegra del Olmo
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container_title	Biological Invasions
container_volume	25
publishDate	2022
institution	Swansea University
issn	1387-3547 1573-1464
doi_str_mv	10.1007/s10530-022-02959-4
publisher	Springer
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description	Non-native salmonids are protected in the Southern hemisphere where they sustain aquaculture and lucrative sport fisheries, but also impact many native fishes, which poses a conservation conundrum. Legal protection and human-assisted secondary releases may have helped salmonids to spread, but this has seldom been tested. We reconstructed the introduction of brown trout (Salmo trutta) to the Falkland Islands using historical records and modelled its dispersal and probability of invasion using a generalized linear model and Leave One out Cross Validation. Our results indicate that establishment success was ~ 88%, and that dispersal was facilitated over land by proximity to invaded sites and density of stream-road crossings, suggesting it was human assisted. Brown trout have already invaded 54% of Falkland rivers, which are 2.9–4.5 times less likely to contain native galaxiids than uninvaded streams. Without strong containment we predict brown trout will invade nearly all suitable freshwater habitats in the Falklands within the next ~ 70 years, which might put native freshwater fishes at a high risk of extinction.
published_date	2022-11-14T16:37:48Z
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Conservation of endangered galaxiid fishes in the Falkland Islands requires urgent action on invasive brown trout

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