Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery
Bycatch of cetaceans in gillnet fisheries is a global problem that can be a major cause of mortality for some species like the harbour porpoise ( Phocoena phocoena ). To avoid cetacean bycatch, one can enhance the reflectivity of the netting material to make the net barrier more audible in the marin...
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Language: | English |
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2024
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Online Access: | https://orbit.dtu.dk/en/publications/b4011fab-fd4f-48f8-94b7-e01361fa009c https://doi.org/10.1016/j.fishres.2024.107032 |
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ftdtupubl:oai:pure.atira.dk:publications/b4011fab-fd4f-48f8-94b7-e01361fa009c 2024-09-15T17:55:33+00:00 Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery Kindt-Larsen, L. Noack, T. Brooks, M.E. Kroner, A-M Glemarec, G. 2024 https://orbit.dtu.dk/en/publications/b4011fab-fd4f-48f8-94b7-e01361fa009c https://doi.org/10.1016/j.fishres.2024.107032 eng eng https://orbit.dtu.dk/en/publications/b4011fab-fd4f-48f8-94b7-e01361fa009c info:eu-repo/semantics/closedAccess Kindt-Larsen , L , Noack , T , Brooks , M E , Kroner , A-M & Glemarec , G 2024 , ' Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery ' , Fisheries Research , vol. 276 , 107032 . https://doi.org/10.1016/j.fishres.2024.107032 Acrylic glass Plastic spheres Bycatch Gillnet Mitigation PearlNet article 2024 ftdtupubl https://doi.org/10.1016/j.fishres.2024.107032 2024-08-05T23:48:30Z Bycatch of cetaceans in gillnet fisheries is a global problem that can be a major cause of mortality for some species like the harbour porpoise ( Phocoena phocoena ). To avoid cetacean bycatch, one can enhance the reflectivity of the netting material to make the net barrier more audible in the marine environment. Plastic spheres made of acrylic glass are highly reflective to sound underwater and can be designed species-specifically to be particularly reflective in the frequencies used for echolocating by the species of concern. “PearlNets” are gillnets incorporating such plastic spheres on the twines and have the potential to reduce bycatch rates by making cetaceans aware of the presence of gillnets in their surroundings. However, PearlNets should also be at least as effective as traditional nets at catching target fish species if fishers are to accept using this new mitigation tool. In this study, we compared the catch rates of target species and the bycatch rates of non-target species between control and PearlNets in a set net fishery for Atlantic cod ( Gadus morhua ) off the Western Baltic Sea. The analysis of the data collected during this trial did not demonstrate a significant difference in catch rates between pearl and control nets (p-values >0.05). In other words, assuming that PearlNets effectively reduce cetacean bycatch, we show that they also maintain catch rates, making this mitigation tool likely acceptable for fishers. Article in Journal/Newspaper atlantic cod Gadus morhua Harbour porpoise Phocoena phocoena Technical University of Denmark: DTU Orbit Fisheries Research 276 107032 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Acrylic glass Plastic spheres Bycatch Gillnet Mitigation PearlNet |
spellingShingle |
Acrylic glass Plastic spheres Bycatch Gillnet Mitigation PearlNet Kindt-Larsen, L. Noack, T. Brooks, M.E. Kroner, A-M Glemarec, G. Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery |
topic_facet |
Acrylic glass Plastic spheres Bycatch Gillnet Mitigation PearlNet |
description |
Bycatch of cetaceans in gillnet fisheries is a global problem that can be a major cause of mortality for some species like the harbour porpoise ( Phocoena phocoena ). To avoid cetacean bycatch, one can enhance the reflectivity of the netting material to make the net barrier more audible in the marine environment. Plastic spheres made of acrylic glass are highly reflective to sound underwater and can be designed species-specifically to be particularly reflective in the frequencies used for echolocating by the species of concern. “PearlNets” are gillnets incorporating such plastic spheres on the twines and have the potential to reduce bycatch rates by making cetaceans aware of the presence of gillnets in their surroundings. However, PearlNets should also be at least as effective as traditional nets at catching target fish species if fishers are to accept using this new mitigation tool. In this study, we compared the catch rates of target species and the bycatch rates of non-target species between control and PearlNets in a set net fishery for Atlantic cod ( Gadus morhua ) off the Western Baltic Sea. The analysis of the data collected during this trial did not demonstrate a significant difference in catch rates between pearl and control nets (p-values >0.05). In other words, assuming that PearlNets effectively reduce cetacean bycatch, we show that they also maintain catch rates, making this mitigation tool likely acceptable for fishers. |
format |
Article in Journal/Newspaper |
author |
Kindt-Larsen, L. Noack, T. Brooks, M.E. Kroner, A-M Glemarec, G. |
author_facet |
Kindt-Larsen, L. Noack, T. Brooks, M.E. Kroner, A-M Glemarec, G. |
author_sort |
Kindt-Larsen, L. |
title |
Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery |
title_short |
Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery |
title_full |
Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery |
title_fullStr |
Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery |
title_full_unstemmed |
Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery |
title_sort |
pearls are not just for girls: plastic spheres do not interfere with target catches in a set net fishery |
publishDate |
2024 |
url |
https://orbit.dtu.dk/en/publications/b4011fab-fd4f-48f8-94b7-e01361fa009c https://doi.org/10.1016/j.fishres.2024.107032 |
genre |
atlantic cod Gadus morhua Harbour porpoise Phocoena phocoena |
genre_facet |
atlantic cod Gadus morhua Harbour porpoise Phocoena phocoena |
op_source |
Kindt-Larsen , L , Noack , T , Brooks , M E , Kroner , A-M & Glemarec , G 2024 , ' Pearls are not just for girls: Plastic spheres do not interfere with target catches in a set net fishery ' , Fisheries Research , vol. 276 , 107032 . https://doi.org/10.1016/j.fishres.2024.107032 |
op_relation |
https://orbit.dtu.dk/en/publications/b4011fab-fd4f-48f8-94b7-e01361fa009c |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.fishres.2024.107032 |
container_title |
Fisheries Research |
container_volume |
276 |
container_start_page |
107032 |
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1810431825342889984 |