Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear
Pelagic longliners targeting swordfish and tunas in oceanic waters regularly capture sharks as bycatch, including currently protected species as the bigeye thresher, Alopias superciliosus. Fifteen bigeye threshers were tagged with pop-up satellite archival tags (PSATs) in 2012-2014 in the tropical n...
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Online Access: | http://hdl.handle.net/10400.1/7607 https://doi.org/10.1016/j.marenvres.2015.10.009 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/7607 2023-05-15T17:41:28+02:00 Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear Coelho, Rui Fernandez-Carvalho, Joana Santos, Miguel N. 2015-12 http://hdl.handle.net/10400.1/7607 https://doi.org/10.1016/j.marenvres.2015.10.009 eng eng Elsevier info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F109915%2F2009/PT info:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F00253%2F2014%2FCP1251%2FCT0001/PT info:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBD%2F60624%2F2009/PT http://www.sciencedirect.com/science/article/pii/S014111361530060X Coelho, R., Fernandez-Carvalho, J., Santos, M.N. 2015. Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear. Marine Environmental Research, 112: 91-99 0141-1136 http://hdl.handle.net/10400.1/7607 http://dx.doi.org/10.1016/j.marenvres.2015.10.009 openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Alopias superciliosus Bycatch Fisheries Temperature and depth recorders Pop-up satellite archival tags Sharks Susceptibility Vertical habitat article 2015 ftunivalgarve https://doi.org/10.1016/j.marenvres.2015.10.009 2023-03-22T01:04:37Z Pelagic longliners targeting swordfish and tunas in oceanic waters regularly capture sharks as bycatch, including currently protected species as the bigeye thresher, Alopias superciliosus. Fifteen bigeye threshers were tagged with pop-up satellite archival tags (PSATs) in 2012-2014 in the tropical northeast Atlantic, with successful transmissions received from 12 tags for a total of 907 tracking days. Marked diel vertical movements were recorded on all specimens, with most of the daytime spent in deeper colder water (mean depth = 353 m, SD = 73; mean temperature = 10.7 °C, SD = 1.8) and nighttime spent in warmer water closer to the surface (mean depth = 72 m, SD = 54; mean temperature = 21.9 °C, SD = 3.7). The operating depth of the pelagic longline gear was measured with Minilog Temperature and Depth Recorders (TDRs), and the overlap with habitat utilization was calculated. Overlap is taking place mainly during the night and is higher for juveniles. The results presented herein can be used as inputs for Ecological Risk Assessments for bigeye threshers captured in oceanic tuna fisheries, and serve as a basis for efficient management and conservation of this vulnerable shark species. Article in Journal/Newspaper Northeast Atlantic Universidade do Algarve: Sapienta Marine Environmental Research 112 91 99 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Alopias superciliosus Bycatch Fisheries Temperature and depth recorders Pop-up satellite archival tags Sharks Susceptibility Vertical habitat |
spellingShingle |
Alopias superciliosus Bycatch Fisheries Temperature and depth recorders Pop-up satellite archival tags Sharks Susceptibility Vertical habitat Coelho, Rui Fernandez-Carvalho, Joana Santos, Miguel N. Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear |
topic_facet |
Alopias superciliosus Bycatch Fisheries Temperature and depth recorders Pop-up satellite archival tags Sharks Susceptibility Vertical habitat |
description |
Pelagic longliners targeting swordfish and tunas in oceanic waters regularly capture sharks as bycatch, including currently protected species as the bigeye thresher, Alopias superciliosus. Fifteen bigeye threshers were tagged with pop-up satellite archival tags (PSATs) in 2012-2014 in the tropical northeast Atlantic, with successful transmissions received from 12 tags for a total of 907 tracking days. Marked diel vertical movements were recorded on all specimens, with most of the daytime spent in deeper colder water (mean depth = 353 m, SD = 73; mean temperature = 10.7 °C, SD = 1.8) and nighttime spent in warmer water closer to the surface (mean depth = 72 m, SD = 54; mean temperature = 21.9 °C, SD = 3.7). The operating depth of the pelagic longline gear was measured with Minilog Temperature and Depth Recorders (TDRs), and the overlap with habitat utilization was calculated. Overlap is taking place mainly during the night and is higher for juveniles. The results presented herein can be used as inputs for Ecological Risk Assessments for bigeye threshers captured in oceanic tuna fisheries, and serve as a basis for efficient management and conservation of this vulnerable shark species. |
format |
Article in Journal/Newspaper |
author |
Coelho, Rui Fernandez-Carvalho, Joana Santos, Miguel N. |
author_facet |
Coelho, Rui Fernandez-Carvalho, Joana Santos, Miguel N. |
author_sort |
Coelho, Rui |
title |
Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear |
title_short |
Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear |
title_full |
Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear |
title_fullStr |
Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear |
title_full_unstemmed |
Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear |
title_sort |
habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear |
publisher |
Elsevier |
publishDate |
2015 |
url |
http://hdl.handle.net/10400.1/7607 https://doi.org/10.1016/j.marenvres.2015.10.009 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F109915%2F2009/PT info:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F00253%2F2014%2FCP1251%2FCT0001/PT info:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBD%2F60624%2F2009/PT http://www.sciencedirect.com/science/article/pii/S014111361530060X Coelho, R., Fernandez-Carvalho, J., Santos, M.N. 2015. Habitat use and diel vertical migration of bigeye thresher shark: overlap with pelagic longline fishing gear. Marine Environmental Research, 112: 91-99 0141-1136 http://hdl.handle.net/10400.1/7607 http://dx.doi.org/10.1016/j.marenvres.2015.10.009 |
op_rights |
openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1016/j.marenvres.2015.10.009 |
container_title |
Marine Environmental Research |
container_volume |
112 |
container_start_page |
91 |
op_container_end_page |
99 |
_version_ |
1766143044276453376 |