A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery
Developing methods to reduce the incidental catch of non-target species is important, as by-catch mortality poses threats especially to large aquatic predators. We examined the effectiveness of a novel device, a "seal sock", in mitigating the by-catch mortality of seals in coastal fyke net...
Main Authors: | , , , |
---|---|
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Plos
|
Subjects: | |
Online Access: | http://jukuri.luke.fi/handle/10024/531617 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127510 |
id |
ftluke:oai:jukuri.luke.fi:10024/531617 |
---|---|
record_format |
openpolar |
spelling |
ftluke:oai:jukuri.luke.fi:10024/531617 2023-10-09T21:55:16+02:00 A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery Oksanen, Sari M. Ahola, Markus P. Oikarinen, Jyrki Kunnasranta, Mervi Department of Biology, University of Eastern Finland Perämeren Kalatalousyhteisöjen Liitto ry Luke / Luonnonvarat ja biotuotanto / Kala-, riista- ja metsäseurannat / Suurpeto- ja riistaseurannat (100602) 100602 Verkkojulkaisu e0127510 true http://jukuri.luke.fi/handle/10024/531617 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127510 eng eng Plos San Francisco, CA us PLoS ONE 10.1371/journal.pone.0127510 5 10 http://jukuri.luke.fi/handle/10024/531617 URN:NBN:fi-fe2016091523763 1932-6203 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127510 by http://journals.plos.org/plosone/s/content-license Under this license, authors agree to make articles legally available for reuse, without permission or fees, for virtually any purpose. Anyone may copy, distribute or reuse these articles, as long as the author and original source are properly cited. Using PLOS Content No permission is required from the authors or the publishers to reuse or repurpose PLOS content provided the original article is cited. In most cases, appropriate attribution can be provided by simply citing the original article. fi=A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä|sv=A1 Originalartikel i en vetenskaplig tidskrift|en=A1 Journal article (refereed), original research| 1 Open access -julkaisu ftluke 2023-09-12T20:24:17Z Developing methods to reduce the incidental catch of non-target species is important, as by-catch mortality poses threats especially to large aquatic predators. We examined the effectiveness of a novel device, a "seal sock", in mitigating the by-catch mortality of seals in coastal fyke net fisheries in the Baltic Sea. The seal sock developed and tested in this study was a cylindrical net attached to the fyke net, allowing the seals access to the surface to breathe while trapped inside fishing gear. The number of dead and live seals caught in fyke nets without a seal sock (years 2008-2010) and with a sock (years 2011-2013) was recorded. The seals caught in fyke nets were mainly juveniles. Of ringed seals (Phoca hispida botnica) both sexes were equally represented, while of grey seals (Halichoerus grypus) the ratio was biased (71%) towards males. All the by-caught seals were dead in the fyke nets without a seal sock, whereas 70% of ringed seals and 11% of grey seals survived when the seal sock was used. The seal sock proved to be effective in reducing the by-catch mortality of ringed seals, but did not perform as well with grey seals. 2015 Article in Journal/Newspaper Phoca hispida Natural Resources Institute Finland: Jukuri |
institution |
Open Polar |
collection |
Natural Resources Institute Finland: Jukuri |
op_collection_id |
ftluke |
language |
English |
description |
Developing methods to reduce the incidental catch of non-target species is important, as by-catch mortality poses threats especially to large aquatic predators. We examined the effectiveness of a novel device, a "seal sock", in mitigating the by-catch mortality of seals in coastal fyke net fisheries in the Baltic Sea. The seal sock developed and tested in this study was a cylindrical net attached to the fyke net, allowing the seals access to the surface to breathe while trapped inside fishing gear. The number of dead and live seals caught in fyke nets without a seal sock (years 2008-2010) and with a sock (years 2011-2013) was recorded. The seals caught in fyke nets were mainly juveniles. Of ringed seals (Phoca hispida botnica) both sexes were equally represented, while of grey seals (Halichoerus grypus) the ratio was biased (71%) towards males. All the by-caught seals were dead in the fyke nets without a seal sock, whereas 70% of ringed seals and 11% of grey seals survived when the seal sock was used. The seal sock proved to be effective in reducing the by-catch mortality of ringed seals, but did not perform as well with grey seals. 2015 |
author2 |
Department of Biology, University of Eastern Finland Perämeren Kalatalousyhteisöjen Liitto ry Luke / Luonnonvarat ja biotuotanto / Kala-, riista- ja metsäseurannat / Suurpeto- ja riistaseurannat (100602) 100602 |
format |
Article in Journal/Newspaper |
author |
Oksanen, Sari M. Ahola, Markus P. Oikarinen, Jyrki Kunnasranta, Mervi |
spellingShingle |
Oksanen, Sari M. Ahola, Markus P. Oikarinen, Jyrki Kunnasranta, Mervi A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery |
author_facet |
Oksanen, Sari M. Ahola, Markus P. Oikarinen, Jyrki Kunnasranta, Mervi |
author_sort |
Oksanen, Sari M. |
title |
A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery |
title_short |
A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery |
title_full |
A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery |
title_fullStr |
A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery |
title_full_unstemmed |
A Novel Tool to Mitigate By-Catch Mortality of Baltic Seals in Coastal Fyke Net Fishery |
title_sort |
novel tool to mitigate by-catch mortality of baltic seals in coastal fyke net fishery |
publisher |
Plos |
url |
http://jukuri.luke.fi/handle/10024/531617 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127510 |
genre |
Phoca hispida |
genre_facet |
Phoca hispida |
op_relation |
PLoS ONE 10.1371/journal.pone.0127510 5 10 http://jukuri.luke.fi/handle/10024/531617 URN:NBN:fi-fe2016091523763 1932-6203 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127510 |
op_rights |
by http://journals.plos.org/plosone/s/content-license Under this license, authors agree to make articles legally available for reuse, without permission or fees, for virtually any purpose. Anyone may copy, distribute or reuse these articles, as long as the author and original source are properly cited. Using PLOS Content No permission is required from the authors or the publishers to reuse or repurpose PLOS content provided the original article is cited. In most cases, appropriate attribution can be provided by simply citing the original article. |
_version_ |
1779319116637667328 |