Assessing the Impact of Pingers and Fishery-related Factors on Seal and Porpoise Bycatch: A study on marine mammal bycatch in Swedish gillnet fisheries ...
Incidental bycatch in gillnet fisheries is considered one of the main threats to harbor porpoise populations worldwide. Such bycatch is depending on several factors, including biotic factors such as porpoise distribution and behaviour, as well as factors related to the characteristics of the fisheri...
| Main Authors: | , , , , , , , , , |
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| Format: | Still Image |
| Language: | unknown |
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figshare
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.6084/m9.figshare.24147228.v1 https://figshare.com/articles/poster/Assessing_the_Impact_of_Pingers_and_Fishery-related_Factors_on_Seal_and_Porpoise_Bycatch_A_study_on_marine_mammal_bycatch_in_Swedish_gillnet_fisheries/24147228/1 |
| Summary: | Incidental bycatch in gillnet fisheries is considered one of the main threats to harbor porpoise populations worldwide. Such bycatch is depending on several factors, including biotic factors such as porpoise distribution and behaviour, as well as factors related to the characteristics of the fisheries.One porpoise bycatch mitigation method proven to be effective in gillnet fisheries are acoustic deterrent devices (pingers). In an ICES’ advice from 2020, pingers were recommended to be used in the Baltic to reduce the bycatch of the endangered Baltic harbour porpoise. However, type of pinger was not specified, most likely due to the fact that pingers available on the market have not been tested in fishing trials or were audible to seals. In the Baltic, the large and increasing grey seal ( Halichoerus grypus) population is causing a serious conflict with the coastal fisheries, due to economic losses. Pingers audible to seals may lead to the “dinner bell” effect, i.e., seals associating the pinger sounds with ... |
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