Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries
Incidental captures (bycatch) remain a key global conservation threat for cetaceans. Bycatch of harbour porpoise Phocoena phocoena in set gillnets is routinely monitored in European Union fisheries, but generally relies on data collected at low spatio-temporal resolution or over short periods. In De...
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ftroysocietyfig:oai:figshare.com:article/23557767 2023-07-16T03:58:52+02:00 Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries Lotte Kindt-Larsen Gildas Glemarec Casper W. Berg Sara Königson Anne-Mette Kroner Mathias Søgaard David Lusseau 2023-06-22T02:45:08Z https://doi.org/10.6084/m9.figshare.23557767.v1 https://figshare.com/articles/journal_contribution/Supplementary_material_Knowing_the_fishery_to_know_the_bycatch_from_Knowing_the_fishery_to_know_the_bycatch_bias-corrected_estimates_of_harbour_porpoise_bycatch_in_gillnet_fisheries/23557767 unknown doi:10.6084/m9.figshare.23557767.v1 https://figshare.com/articles/journal_contribution/Supplementary_material_Knowing_the_fishery_to_know_the_bycatch_from_Knowing_the_fishery_to_know_the_bycatch_bias-corrected_estimates_of_harbour_porpoise_bycatch_in_gillnet_fisheries/23557767 CC BY 4.0 Ecology fisheries sustainability bycatch harbour porpoise gillnet SDG14 SDG15 Text Journal contribution 2023 ftroysocietyfig https://doi.org/10.6084/m9.figshare.23557767.v1 2023-06-28T23:09:15Z Incidental captures (bycatch) remain a key global conservation threat for cetaceans. Bycatch of harbour porpoise Phocoena phocoena in set gillnets is routinely monitored in European Union fisheries, but generally relies on data collected at low spatio-temporal resolution or over short periods. In Denmark, a long-term monitoring programme started in 2010 using electronic monitoring to collect data on porpoise bycatch and gillnet fishing effort at a fine spatial and temporal scale, including time and position of each fishing operation, together with every associated bycatch event. We used these observations to model bycatch rates, given the operational and ecological characteristics of each haul observed in Danish waters. Fishing effort from the Danish and Swedish gillnet fleets was collected to predict fleet-wide porpoise bycatch in gillnets at regional level. Between 2010 and 2020, yearly total bycatch averaged 2088 animals (95% Cl: 667–6798). For the Western Baltic assessment unit, bycatch levels were above sustainability thresholds. These results demonstrate that fishing characteristics are key determinants of porpoise bycatch and that classical approaches ignoring these features would produce biased estimates. It emphasizes the need for efficient and informative monitoring methods to understand possible conservation impacts of marine mammal bycatch and implement tailored mitigation techniques. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena The Royal Society: Figshare |
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Open Polar |
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The Royal Society: Figshare |
op_collection_id |
ftroysocietyfig |
language |
unknown |
topic |
Ecology fisheries sustainability bycatch harbour porpoise gillnet SDG14 SDG15 |
spellingShingle |
Ecology fisheries sustainability bycatch harbour porpoise gillnet SDG14 SDG15 Lotte Kindt-Larsen Gildas Glemarec Casper W. Berg Sara Königson Anne-Mette Kroner Mathias Søgaard David Lusseau Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries |
topic_facet |
Ecology fisheries sustainability bycatch harbour porpoise gillnet SDG14 SDG15 |
description |
Incidental captures (bycatch) remain a key global conservation threat for cetaceans. Bycatch of harbour porpoise Phocoena phocoena in set gillnets is routinely monitored in European Union fisheries, but generally relies on data collected at low spatio-temporal resolution or over short periods. In Denmark, a long-term monitoring programme started in 2010 using electronic monitoring to collect data on porpoise bycatch and gillnet fishing effort at a fine spatial and temporal scale, including time and position of each fishing operation, together with every associated bycatch event. We used these observations to model bycatch rates, given the operational and ecological characteristics of each haul observed in Danish waters. Fishing effort from the Danish and Swedish gillnet fleets was collected to predict fleet-wide porpoise bycatch in gillnets at regional level. Between 2010 and 2020, yearly total bycatch averaged 2088 animals (95% Cl: 667–6798). For the Western Baltic assessment unit, bycatch levels were above sustainability thresholds. These results demonstrate that fishing characteristics are key determinants of porpoise bycatch and that classical approaches ignoring these features would produce biased estimates. It emphasizes the need for efficient and informative monitoring methods to understand possible conservation impacts of marine mammal bycatch and implement tailored mitigation techniques. |
format |
Article in Journal/Newspaper |
author |
Lotte Kindt-Larsen Gildas Glemarec Casper W. Berg Sara Königson Anne-Mette Kroner Mathias Søgaard David Lusseau |
author_facet |
Lotte Kindt-Larsen Gildas Glemarec Casper W. Berg Sara Königson Anne-Mette Kroner Mathias Søgaard David Lusseau |
author_sort |
Lotte Kindt-Larsen |
title |
Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries |
title_short |
Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries |
title_full |
Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries |
title_fullStr |
Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries |
title_full_unstemmed |
Supplementary material: Knowing the fishery to know the bycatch from Knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries |
title_sort |
supplementary material: knowing the fishery to know the bycatch from knowing the fishery to know the bycatch: bias-corrected estimates of harbour porpoise bycatch in gillnet fisheries |
publishDate |
2023 |
url |
https://doi.org/10.6084/m9.figshare.23557767.v1 https://figshare.com/articles/journal_contribution/Supplementary_material_Knowing_the_fishery_to_know_the_bycatch_from_Knowing_the_fishery_to_know_the_bycatch_bias-corrected_estimates_of_harbour_porpoise_bycatch_in_gillnet_fisheries/23557767 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_relation |
doi:10.6084/m9.figshare.23557767.v1 https://figshare.com/articles/journal_contribution/Supplementary_material_Knowing_the_fishery_to_know_the_bycatch_from_Knowing_the_fishery_to_know_the_bycatch_bias-corrected_estimates_of_harbour_porpoise_bycatch_in_gillnet_fisheries/23557767 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.6084/m9.figshare.23557767.v1 |
_version_ |
1771546225615568896 |