Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins
Accounting for population diversity can be critical to the sustainable management of mixed-stock fisheries because harvest rates that can be sustained by productive populations may come at the cost of overfishing less productive ones. While these harvest–diversity trade-offs are well-recognized, the...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/cjfas-2019-0282 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0282 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0282 |
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crcansciencepubl:10.1139/cjfas-2019-0282 2024-06-23T07:54:25+00:00 Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins Connors, Brendan M. Staton, Benjamin Coggins, Lewis Walters, Carl Jones, Mike Gwinn, Daniel Catalano, Matt Fleischman, Steve 2020 http://dx.doi.org/10.1139/cjfas-2019-0282 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0282 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0282 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 77, issue 6, page 1076-1089 ISSN 0706-652X 1205-7533 journal-article 2020 crcansciencepubl https://doi.org/10.1139/cjfas-2019-0282 2024-06-13T04:10:51Z Accounting for population diversity can be critical to the sustainable management of mixed-stock fisheries because harvest rates that can be sustained by productive populations may come at the cost of overfishing less productive ones. While these harvest–diversity trade-offs are well-recognized, their consequences for harvest policy performance are not often explicitly evaluated in contemporary fisheries management. We use closed-loop simulations to evaluate the ability of alternative harvest policies to meet population diversity and fishery objectives for one of the largest subsistence Chinook salmon (Oncorhynchus tshawytscha) fisheries in the world (Kuskokwim River Basin in western Alaska). We found clear evidence of population diversity that resulted in asymmetric trade-offs among fishery and conservation objectives whereby policies that forgo relatively small amounts of harvest result in relatively large increases in equitable access to Chinook and elimination of risk of weak stock extirpation. The performance of alternative harvest policies, and the magnitude of trade-offs, were sensitive to regime shifts and uncertainty in the drivers of recruitment variation. However, we found that harvest policies that prioritized meeting minimum subsistence needs were unlikely to jeopardize long-term sustainability. Article in Journal/Newspaper Kuskokwim Alaska Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 77 6 1076 1089 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Accounting for population diversity can be critical to the sustainable management of mixed-stock fisheries because harvest rates that can be sustained by productive populations may come at the cost of overfishing less productive ones. While these harvest–diversity trade-offs are well-recognized, their consequences for harvest policy performance are not often explicitly evaluated in contemporary fisheries management. We use closed-loop simulations to evaluate the ability of alternative harvest policies to meet population diversity and fishery objectives for one of the largest subsistence Chinook salmon (Oncorhynchus tshawytscha) fisheries in the world (Kuskokwim River Basin in western Alaska). We found clear evidence of population diversity that resulted in asymmetric trade-offs among fishery and conservation objectives whereby policies that forgo relatively small amounts of harvest result in relatively large increases in equitable access to Chinook and elimination of risk of weak stock extirpation. The performance of alternative harvest policies, and the magnitude of trade-offs, were sensitive to regime shifts and uncertainty in the drivers of recruitment variation. However, we found that harvest policies that prioritized meeting minimum subsistence needs were unlikely to jeopardize long-term sustainability. |
format |
Article in Journal/Newspaper |
author |
Connors, Brendan M. Staton, Benjamin Coggins, Lewis Walters, Carl Jones, Mike Gwinn, Daniel Catalano, Matt Fleischman, Steve |
spellingShingle |
Connors, Brendan M. Staton, Benjamin Coggins, Lewis Walters, Carl Jones, Mike Gwinn, Daniel Catalano, Matt Fleischman, Steve Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins |
author_facet |
Connors, Brendan M. Staton, Benjamin Coggins, Lewis Walters, Carl Jones, Mike Gwinn, Daniel Catalano, Matt Fleischman, Steve |
author_sort |
Connors, Brendan M. |
title |
Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins |
title_short |
Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins |
title_full |
Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins |
title_fullStr |
Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins |
title_full_unstemmed |
Incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins |
title_sort |
incorporating harvest–population diversity trade-offs into harvest policy analyses of salmon management in large river basins |
publisher |
Canadian Science Publishing |
publishDate |
2020 |
url |
http://dx.doi.org/10.1139/cjfas-2019-0282 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0282 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0282 |
genre |
Kuskokwim Alaska |
genre_facet |
Kuskokwim Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 77, issue 6, page 1076-1089 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2019-0282 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
77 |
container_issue |
6 |
container_start_page |
1076 |
op_container_end_page |
1089 |
_version_ |
1802646574128431104 |