Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S)
Fisheries bycatch can severely affect the population status of species with low resilience such as sharks. Bycatch monitoring is an important issue for the development of conservation and management plans for these species. The main objectives of this study were to quantify and model the spatiotempo...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1139/cjfas-2016-0114 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0114 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0114 |
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crcansciencepubl:10.1139/cjfas-2016-0114 2024-06-23T07:54:27+00:00 Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S) Cortés, Federico Waessle, Juan A. 2017 http://dx.doi.org/10.1139/cjfas-2016-0114 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0114 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0114 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 7, page 1100-1110 ISSN 0706-652X 1205-7533 journal-article 2017 crcansciencepubl https://doi.org/10.1139/cjfas-2016-0114 2024-05-24T13:05:52Z Fisheries bycatch can severely affect the population status of species with low resilience such as sharks. Bycatch monitoring is an important issue for the development of conservation and management plans for these species. The main objectives of this study were to quantify and model the spatiotemporal trend of bycatch for porbeagle shark (Lamna nasus) in the Argentinean surimi trawl fleet to identify hotspots in the southwestern Atlantic Ocean. Using onboard observer data, we have demonstrated that L. nasus was usually caught as bycatch by the surimi trawl fleet operating in the southern limits of the southwestern Atlantic (51°S–57°S), representing an important part of the reported catch for the Atlantic Ocean. Delta and Tweedie models indicated that bycatch had a relatively stable trend, was concentrated in a limited region of the study area, and was associated with spatiotemporal, operational, environmental, and prey availability variables. The model with the best predictive capability used for the spatial delineation of hotspots for L. nasus bycatch showed that the areas located south of 54°12′S and over the continental shelf-break were critical for the porbeagle conservation and management strategies in the southwestern Atlantic Ocean. Article in Journal/Newspaper Lamna nasus Porbeagle Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 74 7 1100 1110 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Fisheries bycatch can severely affect the population status of species with low resilience such as sharks. Bycatch monitoring is an important issue for the development of conservation and management plans for these species. The main objectives of this study were to quantify and model the spatiotemporal trend of bycatch for porbeagle shark (Lamna nasus) in the Argentinean surimi trawl fleet to identify hotspots in the southwestern Atlantic Ocean. Using onboard observer data, we have demonstrated that L. nasus was usually caught as bycatch by the surimi trawl fleet operating in the southern limits of the southwestern Atlantic (51°S–57°S), representing an important part of the reported catch for the Atlantic Ocean. Delta and Tweedie models indicated that bycatch had a relatively stable trend, was concentrated in a limited region of the study area, and was associated with spatiotemporal, operational, environmental, and prey availability variables. The model with the best predictive capability used for the spatial delineation of hotspots for L. nasus bycatch showed that the areas located south of 54°12′S and over the continental shelf-break were critical for the porbeagle conservation and management strategies in the southwestern Atlantic Ocean. |
format |
Article in Journal/Newspaper |
author |
Cortés, Federico Waessle, Juan A. |
spellingShingle |
Cortés, Federico Waessle, Juan A. Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S) |
author_facet |
Cortés, Federico Waessle, Juan A. |
author_sort |
Cortés, Federico |
title |
Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S) |
title_short |
Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S) |
title_full |
Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S) |
title_fullStr |
Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S) |
title_full_unstemmed |
Hotspots for porbeagle shark ( Lamna nasus) bycatch in the southwestern Atlantic (51°S–57°S) |
title_sort |
hotspots for porbeagle shark ( lamna nasus) bycatch in the southwestern atlantic (51°s–57°s) |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/cjfas-2016-0114 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0114 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0114 |
genre |
Lamna nasus Porbeagle |
genre_facet |
Lamna nasus Porbeagle |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 7, page 1100-1110 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2016-0114 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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74 |
container_issue |
7 |
container_start_page |
1100 |
op_container_end_page |
1110 |
_version_ |
1802646599662305280 |