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...
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ftpubmed:oai:pubmedcentral.nih.gov:5563797 2023-05-15T17:33:51+02:00 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 2017-08-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5563797/ http://www.ncbi.nlm.nih.gov/pubmed/28768885 https://doi.org/10.1098/rspb.2017.0658 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5563797/ http://www.ncbi.nlm.nih.gov/pubmed/28768885 http://dx.doi.org/10.1098/rspb.2017.0658 © 2017 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Global Change and Conservation Text 2017 ftpubmed https://doi.org/10.1098/rspb.2017.0658 2018-08-19T00:07:11Z 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. Text North Atlantic PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 284 1860 20170658 |
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English |
topic |
Global Change and Conservation |
spellingShingle |
Global Change and Conservation 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 |
topic_facet |
Global Change and Conservation |
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. |
format |
Text |
author |
Byrne, Michael E. Cortés, Enric Vaudo, Jeremy J. Harvey, Guy C. McN. Sampson, Mark Wetherbee, Bradley M. Shivji, Mahmood |
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://www.ncbi.nlm.nih.gov/pmc/articles/PMC5563797/ http://www.ncbi.nlm.nih.gov/pubmed/28768885 https://doi.org/10.1098/rspb.2017.0658 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5563797/ http://www.ncbi.nlm.nih.gov/pubmed/28768885 http://dx.doi.org/10.1098/rspb.2017.0658 |
op_rights |
© 2017 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
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_ |
1766132480394395648 |