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Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon

Benjamin L. Jones, Richard Unsworth Orcid Logo, Susantha Udagedara, Leanne C. Cullen-Unsworth

Frontiers in Marine Science, Volume: 5

Swansea University Author: Richard Unsworth Orcid Logo

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DOI (Published version): 10.3389/fmars.2018.00052

Abstract

By-catch is considered a significant problem in large-scale fisheries yet in small-scale fisheries (SSF), employing >99% of the world's fishers, there is limited quantitative understanding of by-catch, and catches in general. We provide an assessment of by-catch from fishing gears (fyke, tra...

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Published in: Frontiers in Marine Science
ISSN: 2296-7745
Published: Frontiers Media SA
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URI: https://cronfa.swan.ac.uk/Record/cronfa39073
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first_indexed 2018-03-15T05:07:59Z
last_indexed 2018-04-26T13:42:27Z
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spelling v2 39073 2018-03-14 Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon b0f33acd13a3ab541cf2aaea27f4fc2f 0000-0003-0036-9724 Richard Unsworth Richard Unsworth true false 2018-03-14 SBI By-catch is considered a significant problem in large-scale fisheries yet in small-scale fisheries (SSF), employing >99% of the world's fishers, there is limited quantitative understanding of by-catch, and catches in general. We provide an assessment of by-catch from fishing gears (fyke, trawl, set trammel, and drift trammel nets) commonly used in small-scale fisheries across the globe, using a representative Sri Lankan case study and placing this in the context of local resource use patterns. We reveal evidence of how SSF generate significant finfish by-catch with potentially significant ecological impacts. Fishers targeting shrimp (fyke, trawl, and drift trammel nets) caught more non-target species than global averages (44, 44, and 67% by weight, respectively). Fishers targeting finfish (set trammel nets) caught fewer non-target species. We found that by-catch depends more on target species and gear type, supporting suggestions that SSF are not “inherently more sustainable” than their large-scale counterparts and a collective effort is required for an improved understanding of the impacts of SSF. This study highlights an additional issue of valuable food fish discards, raising questions about fisheries exploitation in the context of food security in areas where poverty and food insecurity are prevalent. Journal Article Frontiers in Marine Science 5 Frontiers Media SA 2296-7745 0 0 0 0001-01-01 10.3389/fmars.2018.00052 http://dx.doi.org/10.3389/fmars.2018.00052 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2023-07-10T14:56:20.3560304 2018-03-14T20:57:01.6704358 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Benjamin L. Jones 1 Richard Unsworth 0000-0003-0036-9724 2 Susantha Udagedara 3 Leanne C. Cullen-Unsworth 4 39073__8402__caffbf53297446fdbb3ef4b53abfee71.pdf 39073.pdf 2018-03-26T14:49:33.4670000 Output 5470217 application/pdf Version of Record true Copyright © 2018 Jones, Unsworth, Udagedara and Cullen-Unsworth. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). true eng
title Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon
spellingShingle Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon
Richard Unsworth
title_short Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon
title_full Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon
title_fullStr Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon
title_full_unstemmed Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon
title_sort Conservation Concerns of Small-Scale Fisheries: By-Catch Impacts of a Shrimp and Finfish Fishery in a Sri Lankan Lagoon
author_id_str_mv b0f33acd13a3ab541cf2aaea27f4fc2f
author_id_fullname_str_mv b0f33acd13a3ab541cf2aaea27f4fc2f_***_Richard Unsworth
author Richard Unsworth
author2 Benjamin L. Jones
Richard Unsworth
Susantha Udagedara
Leanne C. Cullen-Unsworth
format Journal article
container_title Frontiers in Marine Science
container_volume 5
institution Swansea University
issn 2296-7745
doi_str_mv 10.3389/fmars.2018.00052
publisher Frontiers Media SA
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hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
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department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
url http://dx.doi.org/10.3389/fmars.2018.00052
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description By-catch is considered a significant problem in large-scale fisheries yet in small-scale fisheries (SSF), employing >99% of the world's fishers, there is limited quantitative understanding of by-catch, and catches in general. We provide an assessment of by-catch from fishing gears (fyke, trawl, set trammel, and drift trammel nets) commonly used in small-scale fisheries across the globe, using a representative Sri Lankan case study and placing this in the context of local resource use patterns. We reveal evidence of how SSF generate significant finfish by-catch with potentially significant ecological impacts. Fishers targeting shrimp (fyke, trawl, and drift trammel nets) caught more non-target species than global averages (44, 44, and 67% by weight, respectively). Fishers targeting finfish (set trammel nets) caught fewer non-target species. We found that by-catch depends more on target species and gear type, supporting suggestions that SSF are not “inherently more sustainable” than their large-scale counterparts and a collective effort is required for an improved understanding of the impacts of SSF. This study highlights an additional issue of valuable food fish discards, raising questions about fisheries exploitation in the context of food security in areas where poverty and food insecurity are prevalent.
published_date 0001-01-01T14:56:16Z
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