A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations
1.Incidental mortality (bycatch) in fisheries remains the greatest threat to many large marine vertebrates and is a major barrier to fisheries sustainability. Robust assessments of bycatch risk are crucial for informing effective mitigation strategies, but are hampered by missing information on the...
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British Ecological Society
2019
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Online Access: | http://nora.nerc.ac.uk/id/eprint/520614/ https://nora.nerc.ac.uk/id/eprint/520614/1/Clay_et_al-2019-Journal_of_Applied_Ecology.pdf https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2664.13407 |
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ftnerc:oai:nora.nerc.ac.uk:520614 2023-05-15T13:49:35+02:00 A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations Clay, Thomas A. Small, Cleo Tuck, Geoffrey N. Pardo, Deborah Carneiro, Ana P.B. Wood, Andy G. Croxall, John P. Crossin, Glenn T. Phillips, Richard A. 2019-08 text http://nora.nerc.ac.uk/id/eprint/520614/ https://nora.nerc.ac.uk/id/eprint/520614/1/Clay_et_al-2019-Journal_of_Applied_Ecology.pdf https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2664.13407 en eng British Ecological Society https://nora.nerc.ac.uk/id/eprint/520614/1/Clay_et_al-2019-Journal_of_Applied_Ecology.pdf Clay, Thomas A. orcid:0000-0002-0644-6105 Small, Cleo; Tuck, Geoffrey N.; Pardo, Deborah; Carneiro, Ana P.B.; Wood, Andy G.; Croxall, John P.; Crossin, Glenn T.; Phillips, Richard A. 2019 A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations. Journal of Applied Ecology, 56 (8). 1882-1893. https://doi.org/10.1111/1365-2664.13407 <https://doi.org/10.1111/1365-2664.13407> cc_by_4 CC-BY Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.1111/1365-2664.13407 2023-02-04T19:46:51Z 1.Incidental mortality (bycatch) in fisheries remains the greatest threat to many large marine vertebrates and is a major barrier to fisheries sustainability. Robust assessments of bycatch risk are crucial for informing effective mitigation strategies, but are hampered by missing information on the distributions of key life‐history stages (adult breeders and non‐breeders, immatures and juveniles). 2.Using a comprehensive biologging dataset (1,692 tracks, 788 individuals) spanning all major life‐history stages, we assessed spatial overlap of four threatened seabird populations from South Georgia, with longline and trawl fisheries in the Southern Ocean. We generated monthly population‐level distributions, weighting each life‐history stage according to population age structure based on demographic models. Specifically, we determined where and when birds were at greatest potential bycatch risk, and from which fleets. 3.Overlap with both pelagic and demersal longline fisheries was highest for black‐browed albatrosses, then white‐chinned petrels, wandering and grey‐headed albatrosses, whereas overlap with trawl fisheries was highest for white‐chinned petrels. 4.Hotspots of fisheries overlap occurred in all major ocean basins, but particularly the south‐east and south‐west Atlantic Ocean (longline and trawl) and south‐west Indian Ocean (pelagic longline). Overlap was greatest with pelagic longline fleets in May–September, when fishing effort south of 25°S is highest, and with demersal and trawl fisheries in January–June. Overlap scores were dominated by particular fleets: pelagic longline—Japan, Taiwan; demersal longline and trawl—Argentina, Namibia, Falklands, South Africa; demersal longline—Convention for Conservation of Antarctic Marine Living Resources (CCAMLR) waters, Chile, New Zealand. 5.Synthesis and applications. We provide a framework for calculating appropriately weighted population‐level distributions from biologging data, which we recommend for future fisheries bycatch risk assessments. Many regions of ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean Indian New Zealand Argentina Journal of Applied Ecology 56 8 1882 1893 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
1.Incidental mortality (bycatch) in fisheries remains the greatest threat to many large marine vertebrates and is a major barrier to fisheries sustainability. Robust assessments of bycatch risk are crucial for informing effective mitigation strategies, but are hampered by missing information on the distributions of key life‐history stages (adult breeders and non‐breeders, immatures and juveniles). 2.Using a comprehensive biologging dataset (1,692 tracks, 788 individuals) spanning all major life‐history stages, we assessed spatial overlap of four threatened seabird populations from South Georgia, with longline and trawl fisheries in the Southern Ocean. We generated monthly population‐level distributions, weighting each life‐history stage according to population age structure based on demographic models. Specifically, we determined where and when birds were at greatest potential bycatch risk, and from which fleets. 3.Overlap with both pelagic and demersal longline fisheries was highest for black‐browed albatrosses, then white‐chinned petrels, wandering and grey‐headed albatrosses, whereas overlap with trawl fisheries was highest for white‐chinned petrels. 4.Hotspots of fisheries overlap occurred in all major ocean basins, but particularly the south‐east and south‐west Atlantic Ocean (longline and trawl) and south‐west Indian Ocean (pelagic longline). Overlap was greatest with pelagic longline fleets in May–September, when fishing effort south of 25°S is highest, and with demersal and trawl fisheries in January–June. Overlap scores were dominated by particular fleets: pelagic longline—Japan, Taiwan; demersal longline and trawl—Argentina, Namibia, Falklands, South Africa; demersal longline—Convention for Conservation of Antarctic Marine Living Resources (CCAMLR) waters, Chile, New Zealand. 5.Synthesis and applications. We provide a framework for calculating appropriately weighted population‐level distributions from biologging data, which we recommend for future fisheries bycatch risk assessments. Many regions of ... |
format |
Article in Journal/Newspaper |
author |
Clay, Thomas A. Small, Cleo Tuck, Geoffrey N. Pardo, Deborah Carneiro, Ana P.B. Wood, Andy G. Croxall, John P. Crossin, Glenn T. Phillips, Richard A. |
spellingShingle |
Clay, Thomas A. Small, Cleo Tuck, Geoffrey N. Pardo, Deborah Carneiro, Ana P.B. Wood, Andy G. Croxall, John P. Crossin, Glenn T. Phillips, Richard A. A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations |
author_facet |
Clay, Thomas A. Small, Cleo Tuck, Geoffrey N. Pardo, Deborah Carneiro, Ana P.B. Wood, Andy G. Croxall, John P. Crossin, Glenn T. Phillips, Richard A. |
author_sort |
Clay, Thomas A. |
title |
A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations |
title_short |
A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations |
title_full |
A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations |
title_fullStr |
A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations |
title_full_unstemmed |
A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations |
title_sort |
comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations |
publisher |
British Ecological Society |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/520614/ https://nora.nerc.ac.uk/id/eprint/520614/1/Clay_et_al-2019-Journal_of_Applied_Ecology.pdf https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2664.13407 |
geographic |
Antarctic Southern Ocean Indian New Zealand Argentina |
geographic_facet |
Antarctic Southern Ocean Indian New Zealand Argentina |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520614/1/Clay_et_al-2019-Journal_of_Applied_Ecology.pdf Clay, Thomas A. orcid:0000-0002-0644-6105 Small, Cleo; Tuck, Geoffrey N.; Pardo, Deborah; Carneiro, Ana P.B.; Wood, Andy G.; Croxall, John P.; Crossin, Glenn T.; Phillips, Richard A. 2019 A comprehensive large-scale assessment of fisheries bycatch risk to threatened seabird populations. Journal of Applied Ecology, 56 (8). 1882-1893. https://doi.org/10.1111/1365-2664.13407 <https://doi.org/10.1111/1365-2664.13407> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1111/1365-2664.13407 |
container_title |
Journal of Applied Ecology |
container_volume |
56 |
container_issue |
8 |
container_start_page |
1882 |
op_container_end_page |
1893 |
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1766251798184591360 |