Biogeophysical and physiological processes drive movement patterns in a marine predator
Background: Blue sharks (Prionace glauca) are among the most abundant and widely distributed of oceanic elasmobranchs. Millions are taken annually in pelagic longline fisheries and comprise the highest component of auctioned fin weight in the international shark fin trade. Though studies of blue sha...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:bio_facpubs-1181 2024-09-15T18:26:21+00:00 Biogeophysical and physiological processes drive movement patterns in a marine predator Howey, Lucy A. Wetherbee, Bradley M. Tolentino, Emily R. Shuvji, Mahmood S. 2017-01-01T08:00:00Z application/pdf https://digitalcommons.uri.edu/bio_facpubs/203 https://doi.org/10.1186/s40462-017-0107-z https://digitalcommons.uri.edu/context/bio_facpubs/article/1181/viewcontent/Wetherbee_Biogeophysical_2017.pdf unknown DigitalCommons@URI https://digitalcommons.uri.edu/bio_facpubs/203 doi:10.1186/s40462-017-0107-z https://digitalcommons.uri.edu/context/bio_facpubs/article/1181/viewcontent/Wetherbee_Biogeophysical_2017.pdf http://creativecommons.org/licenses/by/4.0/ Biological Sciences Faculty Publications text 2017 ftunivrhodeislan https://doi.org/10.1186/s40462-017-0107-z 2024-08-21T00:09:33Z Background: Blue sharks (Prionace glauca) are among the most abundant and widely distributed of oceanic elasmobranchs. Millions are taken annually in pelagic longline fisheries and comprise the highest component of auctioned fin weight in the international shark fin trade. Though studies of blue sharks outnumber those of other large pelagic sharks, the species’ complicated and sexually segregated life history still confound current understanding of Atlantic movement patterns. Lack of detailed information regarding movement and vertical behavior continues to limit management efforts that require such data for stock assessment and sustainable catch modeling. Therefore, this study aims to describe behavioral and ecological patterns distinct to aggregating and migrating blue sharks, and compare the findings to existing Atlantic movement models. Results: Data collected from 23 blue sharks instrumented with pop-up satellite archival tags were used in statistical predictive regression models to investigate habitat use during a localized aggregation in the northwest Atlantic, while undergoing seasonal migrations, and with respect to environmental variables. Deployment durations ranged from 4 to 273 days, with sharks inhabiting both productive coastal waters and the open ocean, and exhibiting long-distance seasonal movements exceeding 3700 km. While aggregating on the continental shelf of the northwest Atlantic, blue sharks displayed consistent depth use independent of sex and life stage, and exhibited varied response to environmental (temperature and chlorophyll a) factors. As sharks dispersed from the aggregation site, depth use was influenced by bathymetry, latitude, demography, and presence in the Gulf Stream. Mature females were not observed at the New England tagging site, however, two mature females with recent mating wounds were captured and tagged opportunistically in The Bahamas, one of which migrated to the Mid-Atlantic Ridge. Conclusions: Vertical behaviors displayed by blue sharks varied greatly among ... Text Northwest Atlantic University of Rhode Island: DigitalCommons@URI Movement Ecology 5 1 |
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University of Rhode Island: DigitalCommons@URI |
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ftunivrhodeislan |
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unknown |
description |
Background: Blue sharks (Prionace glauca) are among the most abundant and widely distributed of oceanic elasmobranchs. Millions are taken annually in pelagic longline fisheries and comprise the highest component of auctioned fin weight in the international shark fin trade. Though studies of blue sharks outnumber those of other large pelagic sharks, the species’ complicated and sexually segregated life history still confound current understanding of Atlantic movement patterns. Lack of detailed information regarding movement and vertical behavior continues to limit management efforts that require such data for stock assessment and sustainable catch modeling. Therefore, this study aims to describe behavioral and ecological patterns distinct to aggregating and migrating blue sharks, and compare the findings to existing Atlantic movement models. Results: Data collected from 23 blue sharks instrumented with pop-up satellite archival tags were used in statistical predictive regression models to investigate habitat use during a localized aggregation in the northwest Atlantic, while undergoing seasonal migrations, and with respect to environmental variables. Deployment durations ranged from 4 to 273 days, with sharks inhabiting both productive coastal waters and the open ocean, and exhibiting long-distance seasonal movements exceeding 3700 km. While aggregating on the continental shelf of the northwest Atlantic, blue sharks displayed consistent depth use independent of sex and life stage, and exhibited varied response to environmental (temperature and chlorophyll a) factors. As sharks dispersed from the aggregation site, depth use was influenced by bathymetry, latitude, demography, and presence in the Gulf Stream. Mature females were not observed at the New England tagging site, however, two mature females with recent mating wounds were captured and tagged opportunistically in The Bahamas, one of which migrated to the Mid-Atlantic Ridge. Conclusions: Vertical behaviors displayed by blue sharks varied greatly among ... |
format |
Text |
author |
Howey, Lucy A. Wetherbee, Bradley M. Tolentino, Emily R. Shuvji, Mahmood S. |
spellingShingle |
Howey, Lucy A. Wetherbee, Bradley M. Tolentino, Emily R. Shuvji, Mahmood S. Biogeophysical and physiological processes drive movement patterns in a marine predator |
author_facet |
Howey, Lucy A. Wetherbee, Bradley M. Tolentino, Emily R. Shuvji, Mahmood S. |
author_sort |
Howey, Lucy A. |
title |
Biogeophysical and physiological processes drive movement patterns in a marine predator |
title_short |
Biogeophysical and physiological processes drive movement patterns in a marine predator |
title_full |
Biogeophysical and physiological processes drive movement patterns in a marine predator |
title_fullStr |
Biogeophysical and physiological processes drive movement patterns in a marine predator |
title_full_unstemmed |
Biogeophysical and physiological processes drive movement patterns in a marine predator |
title_sort |
biogeophysical and physiological processes drive movement patterns in a marine predator |
publisher |
DigitalCommons@URI |
publishDate |
2017 |
url |
https://digitalcommons.uri.edu/bio_facpubs/203 https://doi.org/10.1186/s40462-017-0107-z https://digitalcommons.uri.edu/context/bio_facpubs/article/1181/viewcontent/Wetherbee_Biogeophysical_2017.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Biological Sciences Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/bio_facpubs/203 doi:10.1186/s40462-017-0107-z https://digitalcommons.uri.edu/context/bio_facpubs/article/1181/viewcontent/Wetherbee_Biogeophysical_2017.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1186/s40462-017-0107-z |
container_title |
Movement Ecology |
container_volume |
5 |
container_issue |
1 |
_version_ |
1810466825747562496 |