Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage
11 pages, 7 figures, 4 tables Seal-induced damage in the traditional trap-net fishery increased dramatically during the 1990s in the northern Baltic Sea. Most damage is induced by a rapidly growing grey seal (Halichoerus grypus) population. We evaluated seal damage in the coastal trap-net fishery of...
Published in: | Fisheries Research |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2005
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/134410 https://doi.org/10.1016/j.fishres.2005.01.003 |
id |
ftcsic:oai:digital.csic.es:10261/134410 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/134410 2024-02-11T10:08:20+01:00 Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage Kauppinen, Tiina Siira, Antti Suuronen, Petri 2005-06 http://hdl.handle.net/10261/134410 https://doi.org/10.1016/j.fishres.2005.01.003 unknown Elsevier https://doi.org/10.1016/j.fishres.2005.01.003 Sí doi:10.1016/j.fishres.2005.01.003 issn: 0165-7836 Fisheries Research 73(1-2): 99-109 (2005) http://hdl.handle.net/10261/134410 none Seal-induced damage Trap-net Netting materials Gear damage Salmon Baltic Sea artículo http://purl.org/coar/resource_type/c_6501 2005 ftcsic https://doi.org/10.1016/j.fishres.2005.01.003 2024-01-16T10:16:17Z 11 pages, 7 figures, 4 tables Seal-induced damage in the traditional trap-net fishery increased dramatically during the 1990s in the northern Baltic Sea. Most damage is induced by a rapidly growing grey seal (Halichoerus grypus) population. We evaluated seal damage in the coastal trap-net fishery of the Gulf of Bothnia, where different gear constructions and netting materials are used. A total of 72 commercial fishermen with 136 trap-nets were involved in the study. Catch and gear-damage observations made by fishermen were consistent with our own. The largest catch losses of salmon (Salmo salar) were recorded in the Bothnian Sea, where seals damaged at least 37% of salmon catch (by number). In other regions, losses were notably smaller, at between 3 and 9%. The number of salmon caught in a trap on any one occasion correlated significantly with the number of damaged salmon. However, the more salmon were present in a trap, the smaller was the proportion damaged by seals. Observed catch losses in the whitefish (Coregonus sp.) fishery varied between regions from 5 to 7%. Gear damage was observed in 2-15% of trap-net emptyings, depending largely on region. The extent of gear damage followed the trend of catch damage in each region. Fish entanglement in trap-nets increased the amount of gear damage. The type of netting material significantly affected gear-damage frequencies and salmon entanglement. Seal-induced catch and gear damage could be reduced by gear modification and operational changes. The choice of suitable netting materials and the development of seal-safe fish-bags are essential in protecting the gear and catch from seals. © 2005 Elsevier B.V. All rights reserved Peer Reviewed Article in Journal/Newspaper Salmo salar Digital.CSIC (Spanish National Research Council) Fisheries Research 73 1-2 99 109 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Seal-induced damage Trap-net Netting materials Gear damage Salmon Baltic Sea |
spellingShingle |
Seal-induced damage Trap-net Netting materials Gear damage Salmon Baltic Sea Kauppinen, Tiina Siira, Antti Suuronen, Petri Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage |
topic_facet |
Seal-induced damage Trap-net Netting materials Gear damage Salmon Baltic Sea |
description |
11 pages, 7 figures, 4 tables Seal-induced damage in the traditional trap-net fishery increased dramatically during the 1990s in the northern Baltic Sea. Most damage is induced by a rapidly growing grey seal (Halichoerus grypus) population. We evaluated seal damage in the coastal trap-net fishery of the Gulf of Bothnia, where different gear constructions and netting materials are used. A total of 72 commercial fishermen with 136 trap-nets were involved in the study. Catch and gear-damage observations made by fishermen were consistent with our own. The largest catch losses of salmon (Salmo salar) were recorded in the Bothnian Sea, where seals damaged at least 37% of salmon catch (by number). In other regions, losses were notably smaller, at between 3 and 9%. The number of salmon caught in a trap on any one occasion correlated significantly with the number of damaged salmon. However, the more salmon were present in a trap, the smaller was the proportion damaged by seals. Observed catch losses in the whitefish (Coregonus sp.) fishery varied between regions from 5 to 7%. Gear damage was observed in 2-15% of trap-net emptyings, depending largely on region. The extent of gear damage followed the trend of catch damage in each region. Fish entanglement in trap-nets increased the amount of gear damage. The type of netting material significantly affected gear-damage frequencies and salmon entanglement. Seal-induced catch and gear damage could be reduced by gear modification and operational changes. The choice of suitable netting materials and the development of seal-safe fish-bags are essential in protecting the gear and catch from seals. © 2005 Elsevier B.V. All rights reserved Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Kauppinen, Tiina Siira, Antti Suuronen, Petri |
author_facet |
Kauppinen, Tiina Siira, Antti Suuronen, Petri |
author_sort |
Kauppinen, Tiina |
title |
Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage |
title_short |
Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage |
title_full |
Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage |
title_fullStr |
Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage |
title_full_unstemmed |
Temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern Baltic Sea: effect of netting material on damage |
title_sort |
temporal and regional patterns in seal-induced catch and gear damage in the coastal trap-net fishery in the northern baltic sea: effect of netting material on damage |
publisher |
Elsevier |
publishDate |
2005 |
url |
http://hdl.handle.net/10261/134410 https://doi.org/10.1016/j.fishres.2005.01.003 |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_relation |
https://doi.org/10.1016/j.fishres.2005.01.003 Sí doi:10.1016/j.fishres.2005.01.003 issn: 0165-7836 Fisheries Research 73(1-2): 99-109 (2005) http://hdl.handle.net/10261/134410 |
op_rights |
none |
op_doi |
https://doi.org/10.1016/j.fishres.2005.01.003 |
container_title |
Fisheries Research |
container_volume |
73 |
container_issue |
1-2 |
container_start_page |
99 |
op_container_end_page |
109 |
_version_ |
1790607420331917312 |