Lessons from seabird conservation in Alaskan longline fisheries
Abstract Although bycatch of seabirds and other long‐lived species is a critical conservation issue in world fisheries, case studies documenting significant reductions in the mortality of these low‐productivity species in a fishery are rare. We studied progress toward seabird conservation in the Ala...
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crwiley:10.1111/cobi.13288 2024-09-15T18:07:11+00:00 Lessons from seabird conservation in Alaskan longline fisheries Melvin, Edward F. Dietrich, Kimberly S. Suryan, Robert M. Fitzgerald, Shannon M. National Fish and Wildlife Foundation David and Lucile Packard Foundation 2019 http://dx.doi.org/10.1111/cobi.13288 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fcobi.13288 https://onlinelibrary.wiley.com/doi/pdf/10.1111/cobi.13288 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/cobi.13288 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Conservation Biology volume 33, issue 4, page 842-852 ISSN 0888-8892 1523-1739 journal-article 2019 crwiley https://doi.org/10.1111/cobi.13288 2024-08-22T04:15:02Z Abstract Although bycatch of seabirds and other long‐lived species is a critical conservation issue in world fisheries, case studies documenting significant reductions in the mortality of these low‐productivity species in a fishery are rare. We studied progress toward seabird conservation in the Alaskan longline fisheries, one of the largest and most diverse demersal fisheries. We generated annual seabird bycatch rates in 4 target fisheries and all fisheries combined from 23 years of fisheries observer data. We used 0‐inflated negative binomial models to evaluate variables influencing seabird bycatch per unit effort (BPUE) in 2 target fisheries. Following adoption of streamer lines, at first voluntarily and then mandatorily, seabird BPUE was reduced by 77–90%, preventing mortality of thousands of birds per year. Despite this, BPUE increased significantly in 2 of 4 target fisheries since streamer lines were adopted. Although night setting yielded significant reductions (74–97%) in seabird BPUE and significant increases (7–11%) in fish catch per unit effort over daytime setting, nighttime setting increased the BPUE of Northern Fulmar ( Fulmarus glacialis ) by 40% and nontarget fish species by 5–17%. Thus, best practices to prevent seabird mortalities in longline fisheries varied by species assemblage and fishery. Our results inform global efforts toward fisheries bycatch reduction by illustrating that successful conservation requires fishery‐specific solutions, strong industry support, constant vigilance in analysis and reporting observer data, and ongoing outreach to fleets, especially to vessels with anomalously high BPUE. Article in Journal/Newspaper Fulmarus glacialis Northern Fulmar Wiley Online Library Conservation Biology 33 4 842 852 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Although bycatch of seabirds and other long‐lived species is a critical conservation issue in world fisheries, case studies documenting significant reductions in the mortality of these low‐productivity species in a fishery are rare. We studied progress toward seabird conservation in the Alaskan longline fisheries, one of the largest and most diverse demersal fisheries. We generated annual seabird bycatch rates in 4 target fisheries and all fisheries combined from 23 years of fisheries observer data. We used 0‐inflated negative binomial models to evaluate variables influencing seabird bycatch per unit effort (BPUE) in 2 target fisheries. Following adoption of streamer lines, at first voluntarily and then mandatorily, seabird BPUE was reduced by 77–90%, preventing mortality of thousands of birds per year. Despite this, BPUE increased significantly in 2 of 4 target fisheries since streamer lines were adopted. Although night setting yielded significant reductions (74–97%) in seabird BPUE and significant increases (7–11%) in fish catch per unit effort over daytime setting, nighttime setting increased the BPUE of Northern Fulmar ( Fulmarus glacialis ) by 40% and nontarget fish species by 5–17%. Thus, best practices to prevent seabird mortalities in longline fisheries varied by species assemblage and fishery. Our results inform global efforts toward fisheries bycatch reduction by illustrating that successful conservation requires fishery‐specific solutions, strong industry support, constant vigilance in analysis and reporting observer data, and ongoing outreach to fleets, especially to vessels with anomalously high BPUE. |
author2 |
National Fish and Wildlife Foundation David and Lucile Packard Foundation |
format |
Article in Journal/Newspaper |
author |
Melvin, Edward F. Dietrich, Kimberly S. Suryan, Robert M. Fitzgerald, Shannon M. |
spellingShingle |
Melvin, Edward F. Dietrich, Kimberly S. Suryan, Robert M. Fitzgerald, Shannon M. Lessons from seabird conservation in Alaskan longline fisheries |
author_facet |
Melvin, Edward F. Dietrich, Kimberly S. Suryan, Robert M. Fitzgerald, Shannon M. |
author_sort |
Melvin, Edward F. |
title |
Lessons from seabird conservation in Alaskan longline fisheries |
title_short |
Lessons from seabird conservation in Alaskan longline fisheries |
title_full |
Lessons from seabird conservation in Alaskan longline fisheries |
title_fullStr |
Lessons from seabird conservation in Alaskan longline fisheries |
title_full_unstemmed |
Lessons from seabird conservation in Alaskan longline fisheries |
title_sort |
lessons from seabird conservation in alaskan longline fisheries |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/cobi.13288 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fcobi.13288 https://onlinelibrary.wiley.com/doi/pdf/10.1111/cobi.13288 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/cobi.13288 |
genre |
Fulmarus glacialis Northern Fulmar |
genre_facet |
Fulmarus glacialis Northern Fulmar |
op_source |
Conservation Biology volume 33, issue 4, page 842-852 ISSN 0888-8892 1523-1739 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1111/cobi.13288 |
container_title |
Conservation Biology |
container_volume |
33 |
container_issue |
4 |
container_start_page |
842 |
op_container_end_page |
852 |
_version_ |
1810444570069041152 |