Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms
Small cetaceans are susceptible to incidental mortality in the various forms of gillnet fisheries throughout their range. Research conducted since 1994 has shown that acoustic alarms (pingers) emitting high-frequency pulsed sounds effectively reduce the number of harbor porpoise Phocoena phocoena ca...
Published in: | Marine Ecology Progress Series |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Inter Research
2001
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/7371/ https://oceanrep.geomar.de/id/eprint/7371/1/m211p255.pdf https://doi.org/10.3354/meps211255 |
id |
ftoceanrep:oai:oceanrep.geomar.de:7371 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:7371 2023-05-15T17:59:09+02:00 Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms Culik, Boris M. Koschinski, Sven Tregenza, Nick Ellis, Graeme M. 2001 text https://oceanrep.geomar.de/id/eprint/7371/ https://oceanrep.geomar.de/id/eprint/7371/1/m211p255.pdf https://doi.org/10.3354/meps211255 en eng Inter Research https://oceanrep.geomar.de/id/eprint/7371/1/m211p255.pdf Culik, B. M., Koschinski, S., Tregenza, N. and Ellis, G. M. (2001) Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms. Open Access Marine Ecology Progress Series, 211 . pp. 255-260. DOI 10.3354/meps211255 <https://doi.org/10.3354/meps211255>. doi:10.3354/meps211255 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2001 ftoceanrep https://doi.org/10.3354/meps211255 2023-04-07T14:54:44Z Small cetaceans are susceptible to incidental mortality in the various forms of gillnet fisheries throughout their range. Research conducted since 1994 has shown that acoustic alarms (pingers) emitting high-frequency pulsed sounds effectively reduce the number of harbor porpoise Phocoena phocoena casualties in sink gillnets. However, the mechanisms behind the effects of pingers were still not understood. Until now, advantages and risks associated with their widespread use could not be evaluated. Here we present the results of 2 field experiments: (1) theodolite-tracking of harbor porpoises exposed to a single PICE-pinger in Clayoquot Sound, Vancouver Island, Canada and (2) herring Clupea harengus capture rates in surface gillnets equipped with and without acoustic alarms (Dukane Netmark 1000, Lien, PICE) in the Baltic Sea herring fishery at Rügen Island, Germany. Our results show that harbor porpoises do not seem to react to an experimental net in their foraging area (n = 172 groups, median group size = 2 porpoises). Porpoise distance from the mid-point of the net was distributed around a median of only 150 m (range 4 to 987 m). A net equipped with an acoustic alarm, however, was avoided (n = 44 groups) within audible range (distance distribution median = 530 m, range 130 to 1140 m). The porpoises were thus effectively excluded from the ensonified area. Herring, one of the main prey species of harbor porpoises, were not affected by the acoustic alarms tested (n = 25407 fish captured). The advantages and risks of using acoustic alarms to mitigate by-catch are discussed. Article in Journal/Newspaper Phocoena phocoena OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Canada Marine Ecology Progress Series 211 255 260 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Small cetaceans are susceptible to incidental mortality in the various forms of gillnet fisheries throughout their range. Research conducted since 1994 has shown that acoustic alarms (pingers) emitting high-frequency pulsed sounds effectively reduce the number of harbor porpoise Phocoena phocoena casualties in sink gillnets. However, the mechanisms behind the effects of pingers were still not understood. Until now, advantages and risks associated with their widespread use could not be evaluated. Here we present the results of 2 field experiments: (1) theodolite-tracking of harbor porpoises exposed to a single PICE-pinger in Clayoquot Sound, Vancouver Island, Canada and (2) herring Clupea harengus capture rates in surface gillnets equipped with and without acoustic alarms (Dukane Netmark 1000, Lien, PICE) in the Baltic Sea herring fishery at Rügen Island, Germany. Our results show that harbor porpoises do not seem to react to an experimental net in their foraging area (n = 172 groups, median group size = 2 porpoises). Porpoise distance from the mid-point of the net was distributed around a median of only 150 m (range 4 to 987 m). A net equipped with an acoustic alarm, however, was avoided (n = 44 groups) within audible range (distance distribution median = 530 m, range 130 to 1140 m). The porpoises were thus effectively excluded from the ensonified area. Herring, one of the main prey species of harbor porpoises, were not affected by the acoustic alarms tested (n = 25407 fish captured). The advantages and risks of using acoustic alarms to mitigate by-catch are discussed. |
format |
Article in Journal/Newspaper |
author |
Culik, Boris M. Koschinski, Sven Tregenza, Nick Ellis, Graeme M. |
spellingShingle |
Culik, Boris M. Koschinski, Sven Tregenza, Nick Ellis, Graeme M. Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms |
author_facet |
Culik, Boris M. Koschinski, Sven Tregenza, Nick Ellis, Graeme M. |
author_sort |
Culik, Boris M. |
title |
Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms |
title_short |
Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms |
title_full |
Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms |
title_fullStr |
Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms |
title_full_unstemmed |
Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms |
title_sort |
reactions of harbour porpoises (phocoena phocoena) and herring (clupea harengus) to acoustic alarms |
publisher |
Inter Research |
publishDate |
2001 |
url |
https://oceanrep.geomar.de/id/eprint/7371/ https://oceanrep.geomar.de/id/eprint/7371/1/m211p255.pdf https://doi.org/10.3354/meps211255 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_relation |
https://oceanrep.geomar.de/id/eprint/7371/1/m211p255.pdf Culik, B. M., Koschinski, S., Tregenza, N. and Ellis, G. M. (2001) Reactions of harbour porpoises (Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms. Open Access Marine Ecology Progress Series, 211 . pp. 255-260. DOI 10.3354/meps211255 <https://doi.org/10.3354/meps211255>. doi:10.3354/meps211255 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps211255 |
container_title |
Marine Ecology Progress Series |
container_volume |
211 |
container_start_page |
255 |
op_container_end_page |
260 |
_version_ |
1766167905617051648 |