Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries
Abstract Anglers that release Atlantic salmon ( Salmo salar ) in recreational fisheries do so with the intention that the fish will survive and contribute to succeeding generations. In some instances, salmon that are released may be recaptured, but mechanisms associated with recapture are unclear. T...
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crwiley:10.1111/eff.12223 2024-06-02T08:03:29+00:00 Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries Lennox, Robert J. Diserud, Ola H. Cooke, Steven J. Thorstad, Eva B. Whoriskey, Frederick G. Solem, Øyvind Havn, Torgeir B. Uglem, Ingebrigt Norges Forskningsråd Natural Sciences and Engineering Research Council of Canada 2015 http://dx.doi.org/10.1111/eff.12223 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12223 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12223 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 25, issue 3, page 422-428 ISSN 0906-6691 1600-0633 journal-article 2015 crwiley https://doi.org/10.1111/eff.12223 2024-05-03T11:31:04Z Abstract Anglers that release Atlantic salmon ( Salmo salar ) in recreational fisheries do so with the intention that the fish will survive and contribute to succeeding generations. In some instances, salmon that are released may be recaptured, but mechanisms associated with recapture are unclear. To test whether gear avoidance influences recapture rates, we analysed data from tagging programmes in major Norwegian Atlantic salmon fishing rivers to determine how frequently salmon were recaptured by different gear than that by which they were initially captured (i.e. gear switch). Among 339 salmon captured, externally tagged and released in 2012 and 2013, 46 (14%) were recaptured; 70% of these recaptured salmon exhibited gear switch. To test whether this gear switch percentage could be expected in the absence of gear avoidance, a simulation was conducted, which accounted for variation in catch probability among rivers and across time with different gear types based on comprehensive catch data. Each simulation step provided a simulated rate of gear switch under the null hypothesis of no gear avoidance. A distribution was generated, which described the probability that we would observe 70% gear switch. The simulated results indicated that this rate of gear switch was highly unlikely ( P = 0.003) if recapture gear is assumed to be independent of initial capture gear, suggesting that salmon avoided familiar gear types. Changes to behaviour after release, including learned hook avoidance, may explain our observation of gear avoidance by recaptured salmon. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Ecology of Freshwater Fish 25 3 422 428 |
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Wiley Online Library |
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English |
description |
Abstract Anglers that release Atlantic salmon ( Salmo salar ) in recreational fisheries do so with the intention that the fish will survive and contribute to succeeding generations. In some instances, salmon that are released may be recaptured, but mechanisms associated with recapture are unclear. To test whether gear avoidance influences recapture rates, we analysed data from tagging programmes in major Norwegian Atlantic salmon fishing rivers to determine how frequently salmon were recaptured by different gear than that by which they were initially captured (i.e. gear switch). Among 339 salmon captured, externally tagged and released in 2012 and 2013, 46 (14%) were recaptured; 70% of these recaptured salmon exhibited gear switch. To test whether this gear switch percentage could be expected in the absence of gear avoidance, a simulation was conducted, which accounted for variation in catch probability among rivers and across time with different gear types based on comprehensive catch data. Each simulation step provided a simulated rate of gear switch under the null hypothesis of no gear avoidance. A distribution was generated, which described the probability that we would observe 70% gear switch. The simulated results indicated that this rate of gear switch was highly unlikely ( P = 0.003) if recapture gear is assumed to be independent of initial capture gear, suggesting that salmon avoided familiar gear types. Changes to behaviour after release, including learned hook avoidance, may explain our observation of gear avoidance by recaptured salmon. |
author2 |
Norges Forskningsråd Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Lennox, Robert J. Diserud, Ola H. Cooke, Steven J. Thorstad, Eva B. Whoriskey, Frederick G. Solem, Øyvind Havn, Torgeir B. Uglem, Ingebrigt |
spellingShingle |
Lennox, Robert J. Diserud, Ola H. Cooke, Steven J. Thorstad, Eva B. Whoriskey, Frederick G. Solem, Øyvind Havn, Torgeir B. Uglem, Ingebrigt Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries |
author_facet |
Lennox, Robert J. Diserud, Ola H. Cooke, Steven J. Thorstad, Eva B. Whoriskey, Frederick G. Solem, Øyvind Havn, Torgeir B. Uglem, Ingebrigt |
author_sort |
Lennox, Robert J. |
title |
Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries |
title_short |
Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries |
title_full |
Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries |
title_fullStr |
Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries |
title_full_unstemmed |
Influence of gear switching on recapture of Atlantic salmon ( Salmo salar) in catch‐and‐release fisheries |
title_sort |
influence of gear switching on recapture of atlantic salmon ( salmo salar) in catch‐and‐release fisheries |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/eff.12223 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12223 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12223 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Ecology of Freshwater Fish volume 25, issue 3, page 422-428 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12223 |
container_title |
Ecology of Freshwater Fish |
container_volume |
25 |
container_issue |
3 |
container_start_page |
422 |
op_container_end_page |
428 |
_version_ |
1800748025753108480 |