Biogeophysical and physiological processes drive movement patterns in a marine predator
Abstract 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...
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ftdoajarticles:oai:doaj.org/article:b4036f53cf044a3fad8ef325a3f92e2c 2023-05-15T17:45:35+02:00 Biogeophysical and physiological processes drive movement patterns in a marine predator Lucy A. Howey Bradley M. Wetherbee Emily R. Tolentino Mahmood S. Shivji 2017-07-01T00:00:00Z https://doi.org/10.1186/s40462-017-0107-z https://doaj.org/article/b4036f53cf044a3fad8ef325a3f92e2c EN eng BMC http://link.springer.com/article/10.1186/s40462-017-0107-z https://doaj.org/toc/2051-3933 doi:10.1186/s40462-017-0107-z 2051-3933 https://doaj.org/article/b4036f53cf044a3fad8ef325a3f92e2c Movement Ecology, Vol 5, Iss 1, Pp 1-16 (2017) Blue shark Pelagic Sexual segregation Migration Movement Satellite tracking Biology (General) QH301-705.5 article 2017 ftdoajarticles https://doi.org/10.1186/s40462-017-0107-z 2022-12-31T16:30:56Z Abstract 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 ... Article in Journal/Newspaper Northwest Atlantic Directory of Open Access Journals: DOAJ Articles Mid-Atlantic Ridge Movement Ecology 5 1 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Blue shark Pelagic Sexual segregation Migration Movement Satellite tracking Biology (General) QH301-705.5 |
spellingShingle |
Blue shark Pelagic Sexual segregation Migration Movement Satellite tracking Biology (General) QH301-705.5 Lucy A. Howey Bradley M. Wetherbee Emily R. Tolentino Mahmood S. Shivji Biogeophysical and physiological processes drive movement patterns in a marine predator |
topic_facet |
Blue shark Pelagic Sexual segregation Migration Movement Satellite tracking Biology (General) QH301-705.5 |
description |
Abstract 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 |
Article in Journal/Newspaper |
author |
Lucy A. Howey Bradley M. Wetherbee Emily R. Tolentino Mahmood S. Shivji |
author_facet |
Lucy A. Howey Bradley M. Wetherbee Emily R. Tolentino Mahmood S. Shivji |
author_sort |
Lucy A. Howey |
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 |
BMC |
publishDate |
2017 |
url |
https://doi.org/10.1186/s40462-017-0107-z https://doaj.org/article/b4036f53cf044a3fad8ef325a3f92e2c |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Movement Ecology, Vol 5, Iss 1, Pp 1-16 (2017) |
op_relation |
http://link.springer.com/article/10.1186/s40462-017-0107-z https://doaj.org/toc/2051-3933 doi:10.1186/s40462-017-0107-z 2051-3933 https://doaj.org/article/b4036f53cf044a3fad8ef325a3f92e2c |
op_doi |
https://doi.org/10.1186/s40462-017-0107-z |
container_title |
Movement Ecology |
container_volume |
5 |
container_issue |
1 |
_version_ |
1766148720610508800 |