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Optimized fishing through periodically harvested closures

Paul G. Carvalho, Stacy D. Jupiter, Fraser Januchowski-Hartley Orcid Logo, Jordan Goetze, Joachim Claudet, Rebecca Weeks, Austin Humphries, Crow White

Journal of Applied Ecology, Volume: 56, Issue: 8, Pages: 1927 - 1936

Swansea University Author: Fraser Januchowski-Hartley Orcid Logo

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DOI (Published version): 10.1111/1365-2664.13417

Abstract

1. Periodically harvested closures (PHCs) are a traditional form of fisheries management that improve fishing efficiency during harvests, partly by reducing fish wariness to fishers during closed periods. However, whether PHCs also result in high yields and healthy marine ecosystems is unknown, even...

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Published in: Journal of Applied Ecology
ISSN: 0021-8901 1365-2664
Published: Wiley 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50900
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spelling 2020-11-12T17:37:07.1744400 v2 50900 2019-06-22 Optimized fishing through periodically harvested closures 77e5e32d2047f69a621d6d810ff9299b 0000-0003-2468-8199 Fraser Januchowski-Hartley Fraser Januchowski-Hartley true false 2019-06-22 SBI 1. Periodically harvested closures (PHCs) are a traditional form of fisheries management that improve fishing efficiency during harvests, partly by reducing fish wariness to fishers during closed periods. However, whether PHCs also result in high yields and healthy marine ecosystems is unknown, even as PHCs are being promoted as a culturally appropriate management tool in the Indo-Pacific.2. We integrated field-derived estimates of change in fish wariness into a bioeconomic fisheries model to quantify to what degree PHCs can maximize harvest efficiency, fisheries yield and fish stock biomass.3. Our model indicated that PHCs that had a closure period of one to a few years between a single pulse harvest were able to generate equivalent fisheries yield and stock biomass levels, with greater harvest efficiency than was able to be achieved using permanent closures and other fisheries management tools.4. Fish life-history traits had little impact on the optimality of PHCs in maximizing the triple objective of harvest efficiency, fisheries yield and stock abundance, with overfishing similarly having little effect at anything under extreme levels. Under moderate overfishing, there was a trade-off between PHCs, which maximised harvest efficiency, and no-take permanent closures that maximised yield. However, the former outweighed the latter, and only at extreme levels of overfishing, where stock was reduced to < 18 % of unfished biomass, were permanent closures favoured over PHCs. Journal Article Journal of Applied Ecology 56 8 1927 1936 Wiley 0021-8901 1365-2664 bioeconomic model, conservation, fish behaviour, fisheries management, marine protected areas, marine reserves, periodically harvested closures, population dynamics 2 8 2019 2019-08-02 10.1111/1365-2664.13417 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2020-11-12T17:37:07.1744400 2019-06-22T12:19:53.3450484 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Paul G. Carvalho 1 Stacy D. Jupiter 2 Fraser Januchowski-Hartley 0000-0003-2468-8199 3 Jordan Goetze 4 Joachim Claudet 5 Rebecca Weeks 6 Austin Humphries 7 Crow White 8 0050900-10072019165343.pdf 50900.pdf 2019-07-10T16:53:43.4170000 Output 648333 application/pdf Accepted Manuscript true 2020-06-03T00:00:00.0000000 true eng
title Optimized fishing through periodically harvested closures
spellingShingle Optimized fishing through periodically harvested closures
Fraser Januchowski-Hartley
title_short Optimized fishing through periodically harvested closures
title_full Optimized fishing through periodically harvested closures
title_fullStr Optimized fishing through periodically harvested closures
title_full_unstemmed Optimized fishing through periodically harvested closures
title_sort Optimized fishing through periodically harvested closures
author_id_str_mv 77e5e32d2047f69a621d6d810ff9299b
author_id_fullname_str_mv 77e5e32d2047f69a621d6d810ff9299b_***_Fraser Januchowski-Hartley
author Fraser Januchowski-Hartley
author2 Paul G. Carvalho
Stacy D. Jupiter
Fraser Januchowski-Hartley
Jordan Goetze
Joachim Claudet
Rebecca Weeks
Austin Humphries
Crow White
format Journal article
container_title Journal of Applied Ecology
container_volume 56
container_issue 8
container_start_page 1927
publishDate 2019
institution Swansea University
issn 0021-8901
1365-2664
doi_str_mv 10.1111/1365-2664.13417
publisher Wiley
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 1
active_str 0
description 1. Periodically harvested closures (PHCs) are a traditional form of fisheries management that improve fishing efficiency during harvests, partly by reducing fish wariness to fishers during closed periods. However, whether PHCs also result in high yields and healthy marine ecosystems is unknown, even as PHCs are being promoted as a culturally appropriate management tool in the Indo-Pacific.2. We integrated field-derived estimates of change in fish wariness into a bioeconomic fisheries model to quantify to what degree PHCs can maximize harvest efficiency, fisheries yield and fish stock biomass.3. Our model indicated that PHCs that had a closure period of one to a few years between a single pulse harvest were able to generate equivalent fisheries yield and stock biomass levels, with greater harvest efficiency than was able to be achieved using permanent closures and other fisheries management tools.4. Fish life-history traits had little impact on the optimality of PHCs in maximizing the triple objective of harvest efficiency, fisheries yield and stock abundance, with overfishing similarly having little effect at anything under extreme levels. Under moderate overfishing, there was a trade-off between PHCs, which maximised harvest efficiency, and no-take permanent closures that maximised yield. However, the former outweighed the latter, and only at extreme levels of overfishing, where stock was reduced to < 18 % of unfished biomass, were permanent closures favoured over PHCs.
published_date 2019-08-02T04:02:35Z
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score 11.036334

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