Protection from fishing improves body growth of an exploited species
Hunting and fishing are often size-selective, which favours slow body growth. In addition, fast growth rate has been shown to be positively correlated with behavioural traits that increase encounter rates and catchability in passive fishing gears such as baited traps. This harvest-induced selection...
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crroyalsociety:10.1098/rspb.2022.1718 2024-06-02T08:06:16+00:00 Protection from fishing improves body growth of an exploited species Sørdalen, Tonje Knutsen Halvorsen, Kim Tallaksen Olsen, Esben Moland Havforskningsinstituttet Norges Forskningsråd Centre of Coastal Research 2022 http://dx.doi.org/10.1098/rspb.2022.1718 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2022.1718 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2022.1718 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 289, issue 1987 ISSN 0962-8452 1471-2954 journal-article 2022 crroyalsociety https://doi.org/10.1098/rspb.2022.1718 2024-05-07T14:16:21Z Hunting and fishing are often size-selective, which favours slow body growth. In addition, fast growth rate has been shown to be positively correlated with behavioural traits that increase encounter rates and catchability in passive fishing gears such as baited traps. This harvest-induced selection should be effectively eliminated in no-take marine-protected areas (MPAs) unless strong density dependence results in reduced growth rates. We compared body growth of European lobster ( Homarus gammarus ) between three MPAs and three fished areas. After 14 years of protection from intensive, size-selective lobster fisheries, the densities in MPAs have increased considerably, and we demonstrate that females moult more frequently and grow more during each moult in the MPAs. A similar, but weaker pattern was evident for males. This study suggests that MPAs can shield a wild population from slow-growth selection, which can explain the rapid recovery of size structure following implementation. If slow-growth selection is a widespread phenomenon in fisheries, the effectiveness of MPAs as a management tool can be higher than currently anticipated. Article in Journal/Newspaper European lobster Homarus gammarus The Royal Society Proceedings of the Royal Society B: Biological Sciences 289 1987 |
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Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Hunting and fishing are often size-selective, which favours slow body growth. In addition, fast growth rate has been shown to be positively correlated with behavioural traits that increase encounter rates and catchability in passive fishing gears such as baited traps. This harvest-induced selection should be effectively eliminated in no-take marine-protected areas (MPAs) unless strong density dependence results in reduced growth rates. We compared body growth of European lobster ( Homarus gammarus ) between three MPAs and three fished areas. After 14 years of protection from intensive, size-selective lobster fisheries, the densities in MPAs have increased considerably, and we demonstrate that females moult more frequently and grow more during each moult in the MPAs. A similar, but weaker pattern was evident for males. This study suggests that MPAs can shield a wild population from slow-growth selection, which can explain the rapid recovery of size structure following implementation. If slow-growth selection is a widespread phenomenon in fisheries, the effectiveness of MPAs as a management tool can be higher than currently anticipated. |
author2 |
Havforskningsinstituttet Norges Forskningsråd Centre of Coastal Research |
format |
Article in Journal/Newspaper |
author |
Sørdalen, Tonje Knutsen Halvorsen, Kim Tallaksen Olsen, Esben Moland |
spellingShingle |
Sørdalen, Tonje Knutsen Halvorsen, Kim Tallaksen Olsen, Esben Moland Protection from fishing improves body growth of an exploited species |
author_facet |
Sørdalen, Tonje Knutsen Halvorsen, Kim Tallaksen Olsen, Esben Moland |
author_sort |
Sørdalen, Tonje Knutsen |
title |
Protection from fishing improves body growth of an exploited species |
title_short |
Protection from fishing improves body growth of an exploited species |
title_full |
Protection from fishing improves body growth of an exploited species |
title_fullStr |
Protection from fishing improves body growth of an exploited species |
title_full_unstemmed |
Protection from fishing improves body growth of an exploited species |
title_sort |
protection from fishing improves body growth of an exploited species |
publisher |
The Royal Society |
publishDate |
2022 |
url |
http://dx.doi.org/10.1098/rspb.2022.1718 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2022.1718 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2022.1718 |
genre |
European lobster Homarus gammarus |
genre_facet |
European lobster Homarus gammarus |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 289, issue 1987 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2022.1718 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
289 |
container_issue |
1987 |
_version_ |
1800751192271224832 |