Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator
Overfishing is a primary cause of population declines for many shark species of conservation concern. However, means of obtaining information on fishery interactions and mortality, necessary for the development of successful conservation strategies, are often fisheries-dependent and of questionable...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Royal Society
2017
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1098/rspb.2017.0658 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2017.0658 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2017.0658 |
id |
crroyalsociety:10.1098/rspb.2017.0658 |
---|---|
record_format |
openpolar |
spelling |
crroyalsociety:10.1098/rspb.2017.0658 2024-09-09T19:57:18+00:00 Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator Byrne, Michael E. Cortés, Enric Vaudo, Jeremy J. Harvey, Guy C. McN. Sampson, Mark Wetherbee, Bradley M. Shivji, Mahmood Guy Harvey Ocean Foundation Virgin Unite Florida Sea Grant Swiss Shark Foundation/Hai Stiftung 2017 http://dx.doi.org/10.1098/rspb.2017.0658 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2017.0658 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2017.0658 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 284, issue 1860, page 20170658 ISSN 0962-8452 1471-2954 journal-article 2017 crroyalsociety https://doi.org/10.1098/rspb.2017.0658 2024-08-12T04:27:43Z Overfishing is a primary cause of population declines for many shark species of conservation concern. However, means of obtaining information on fishery interactions and mortality, necessary for the development of successful conservation strategies, are often fisheries-dependent and of questionable quality for many species of commercially exploited pelagic sharks. We used satellite telemetry as a fisheries-independent tool to document fisheries interactions, and quantify fishing mortality of the highly migratory shortfin mako shark ( Isurus oxyrinchus ) in the western North Atlantic Ocean. Forty satellite-tagged shortfin mako sharks tracked over 3 years entered the Exclusive Economic Zones of 19 countries and were harvested in fisheries of five countries, with 30% of tagged sharks harvested. Our tagging-derived estimates of instantaneous fishing mortality rates ( F = 0.19–0.56) were 10-fold higher than previous estimates from fisheries-dependent data (approx. 0.015–0.024), suggesting data used in stock assessments may considerably underestimate fishing mortality. Additionally, our estimates of F were greater than those associated with maximum sustainable yield, suggesting a state of overfishing. This information has direct application to evaluations of stock status and for effective management of populations, and thus satellite tagging studies have potential to provide more accurate estimates of fishing mortality and survival than traditional fisheries-dependent methodology. Article in Journal/Newspaper North Atlantic The Royal Society Proceedings of the Royal Society B: Biological Sciences 284 1860 20170658 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Overfishing is a primary cause of population declines for many shark species of conservation concern. However, means of obtaining information on fishery interactions and mortality, necessary for the development of successful conservation strategies, are often fisheries-dependent and of questionable quality for many species of commercially exploited pelagic sharks. We used satellite telemetry as a fisheries-independent tool to document fisheries interactions, and quantify fishing mortality of the highly migratory shortfin mako shark ( Isurus oxyrinchus ) in the western North Atlantic Ocean. Forty satellite-tagged shortfin mako sharks tracked over 3 years entered the Exclusive Economic Zones of 19 countries and were harvested in fisheries of five countries, with 30% of tagged sharks harvested. Our tagging-derived estimates of instantaneous fishing mortality rates ( F = 0.19–0.56) were 10-fold higher than previous estimates from fisheries-dependent data (approx. 0.015–0.024), suggesting data used in stock assessments may considerably underestimate fishing mortality. Additionally, our estimates of F were greater than those associated with maximum sustainable yield, suggesting a state of overfishing. This information has direct application to evaluations of stock status and for effective management of populations, and thus satellite tagging studies have potential to provide more accurate estimates of fishing mortality and survival than traditional fisheries-dependent methodology. |
author2 |
Guy Harvey Ocean Foundation Virgin Unite Florida Sea Grant Swiss Shark Foundation/Hai Stiftung |
format |
Article in Journal/Newspaper |
author |
Byrne, Michael E. Cortés, Enric Vaudo, Jeremy J. Harvey, Guy C. McN. Sampson, Mark Wetherbee, Bradley M. Shivji, Mahmood |
spellingShingle |
Byrne, Michael E. Cortés, Enric Vaudo, Jeremy J. Harvey, Guy C. McN. Sampson, Mark Wetherbee, Bradley M. Shivji, Mahmood Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator |
author_facet |
Byrne, Michael E. Cortés, Enric Vaudo, Jeremy J. Harvey, Guy C. McN. Sampson, Mark Wetherbee, Bradley M. Shivji, Mahmood |
author_sort |
Byrne, Michael E. |
title |
Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator |
title_short |
Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator |
title_full |
Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator |
title_fullStr |
Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator |
title_full_unstemmed |
Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator |
title_sort |
satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator |
publisher |
The Royal Society |
publishDate |
2017 |
url |
http://dx.doi.org/10.1098/rspb.2017.0658 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2017.0658 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2017.0658 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 284, issue 1860, page 20170658 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2017.0658 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
284 |
container_issue |
1860 |
container_start_page |
20170658 |
_version_ |
1809928218351763456 |