Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild
Farmed fish that escape and mix with wild fish populations can have significant ecological and genetic consequences. To reduce the number of escaped fish in the wild, recapture is often attempted. Here, we review the behaviours of escapees post‐escape, and how recapture success varies with escaped f...
Published in: | Reviews in Aquaculture |
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Online Access: | http://hdl.handle.net/10045/74595 https://doi.org/10.1111/raq.12153 |
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ftunivalicante:oai:rua.ua.es:10045/74595 2023-05-15T16:19:21+02:00 Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild Dempster, Tim Arechavala-Lopez, Pablo Barrett, Luke T. Fleming, Ian A. Sanchez-Jerez, Pablo Uglem, Ingebrigt Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada Biología Marina 2018-03 http://hdl.handle.net/10045/74595 https://doi.org/10.1111/raq.12153 eng eng Wiley https://doi.org/10.1111/raq.12153 Reviews in Aquaculture. 2018, 10(1): 153-167. doi:10.1111/raq.12153 1753-5123 (Print) 1753-5131 (Online) http://hdl.handle.net/10045/74595 doi:10.1111/raq.12153 © 2016 Wiley Publishing Asia Pty Ltd info:eu-repo/semantics/openAccess Aquaculture Fish farm Gadus morhua Salmo salar Salmon Zoología info:eu-repo/semantics/article 2018 ftunivalicante https://doi.org/10.1111/raq.12153 2020-06-05T13:19:13Z Farmed fish that escape and mix with wild fish populations can have significant ecological and genetic consequences. To reduce the number of escaped fish in the wild, recapture is often attempted. Here, we review the behaviours of escapees post‐escape, and how recapture success varies with escaped fish size, the size of the initial escape event and recapture methods. Success rates of fishing gears varied among species, with gill‐nets and coastal barrier nets most effective for recapture of salmonids. Recapture success was strongly negatively correlated with both fish size and the number of fish escaped, regardless of species. Recapture success was universally low across all studied species (8%). Numerous tracking studies of escaped fish indicate that recapture efforts should be initiated within 24 h of an escape incident for highest recapture success. However, most large escape events are due to storms, which mean recapture efforts rarely start within this timeframe. Recapture of escaped fish is broadly ineffective in marine habitats, with rare exception. High bycatch rates during ineffective recapture attempts imply that large‐scale recapture efforts should be weighed against the possibility of affecting wild fish populations negatively. We suggest three alternative approaches to reduce escapee numbers in wild habitats: (i) protect populations of predatory fish around sea‐cage farms from fishing, as they prey upon smaller escapees; (ii) construct impact offset programmes to target recapture in habitats where escapees can be efficiently caught; and (iii) ensure technical standards are legislated so that fish farmers invest in preventative technologies to minimize escapes. Article in Journal/Newspaper Gadus morhua Salmo salar RUA - Repositorio Institucional de la Universidad de Alicante Reviews in Aquaculture 10 1 153 167 |
institution |
Open Polar |
collection |
RUA - Repositorio Institucional de la Universidad de Alicante |
op_collection_id |
ftunivalicante |
language |
English |
topic |
Aquaculture Fish farm Gadus morhua Salmo salar Salmon Zoología |
spellingShingle |
Aquaculture Fish farm Gadus morhua Salmo salar Salmon Zoología Dempster, Tim Arechavala-Lopez, Pablo Barrett, Luke T. Fleming, Ian A. Sanchez-Jerez, Pablo Uglem, Ingebrigt Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild |
topic_facet |
Aquaculture Fish farm Gadus morhua Salmo salar Salmon Zoología |
description |
Farmed fish that escape and mix with wild fish populations can have significant ecological and genetic consequences. To reduce the number of escaped fish in the wild, recapture is often attempted. Here, we review the behaviours of escapees post‐escape, and how recapture success varies with escaped fish size, the size of the initial escape event and recapture methods. Success rates of fishing gears varied among species, with gill‐nets and coastal barrier nets most effective for recapture of salmonids. Recapture success was strongly negatively correlated with both fish size and the number of fish escaped, regardless of species. Recapture success was universally low across all studied species (8%). Numerous tracking studies of escaped fish indicate that recapture efforts should be initiated within 24 h of an escape incident for highest recapture success. However, most large escape events are due to storms, which mean recapture efforts rarely start within this timeframe. Recapture of escaped fish is broadly ineffective in marine habitats, with rare exception. High bycatch rates during ineffective recapture attempts imply that large‐scale recapture efforts should be weighed against the possibility of affecting wild fish populations negatively. We suggest three alternative approaches to reduce escapee numbers in wild habitats: (i) protect populations of predatory fish around sea‐cage farms from fishing, as they prey upon smaller escapees; (ii) construct impact offset programmes to target recapture in habitats where escapees can be efficiently caught; and (iii) ensure technical standards are legislated so that fish farmers invest in preventative technologies to minimize escapes. |
author2 |
Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada Biología Marina |
format |
Article in Journal/Newspaper |
author |
Dempster, Tim Arechavala-Lopez, Pablo Barrett, Luke T. Fleming, Ian A. Sanchez-Jerez, Pablo Uglem, Ingebrigt |
author_facet |
Dempster, Tim Arechavala-Lopez, Pablo Barrett, Luke T. Fleming, Ian A. Sanchez-Jerez, Pablo Uglem, Ingebrigt |
author_sort |
Dempster, Tim |
title |
Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild |
title_short |
Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild |
title_full |
Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild |
title_fullStr |
Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild |
title_full_unstemmed |
Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild |
title_sort |
recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild |
publisher |
Wiley |
publishDate |
2018 |
url |
http://hdl.handle.net/10045/74595 https://doi.org/10.1111/raq.12153 |
genre |
Gadus morhua Salmo salar |
genre_facet |
Gadus morhua Salmo salar |
op_relation |
https://doi.org/10.1111/raq.12153 Reviews in Aquaculture. 2018, 10(1): 153-167. doi:10.1111/raq.12153 1753-5123 (Print) 1753-5131 (Online) http://hdl.handle.net/10045/74595 doi:10.1111/raq.12153 |
op_rights |
© 2016 Wiley Publishing Asia Pty Ltd info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/raq.12153 |
container_title |
Reviews in Aquaculture |
container_volume |
10 |
container_issue |
1 |
container_start_page |
153 |
op_container_end_page |
167 |
_version_ |
1766005733422268416 |