Cargando…

A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch

Various plastic strips and sheets (termed ‘simple anterior fish excluders’−SAFEs) were positioned across the openings of penaeid trawls in attempts at reducing the unwanted bycatches of small teleosts. Initially, three SAFEs (a single wire without, and with small and large plastic panels) were compa...

Descripción completa

Detalles Bibliográficos
Autores principales: McHugh, Matthew J., Broadhurst, Matt K., Sterling, David J., Millar, Russell B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4383628/
https://www.ncbi.nlm.nih.gov/pubmed/25837892
http://dx.doi.org/10.1371/journal.pone.0123124
_version_ 1782364777338634240
author McHugh, Matthew J.
Broadhurst, Matt K.
Sterling, David J.
Millar, Russell B.
author_facet McHugh, Matthew J.
Broadhurst, Matt K.
Sterling, David J.
Millar, Russell B.
author_sort McHugh, Matthew J.
collection PubMed
description Various plastic strips and sheets (termed ‘simple anterior fish excluders’−SAFEs) were positioned across the openings of penaeid trawls in attempts at reducing the unwanted bycatches of small teleosts. Initially, three SAFEs (a single wire without, and with small and large plastic panels) were compared against a control (no SAFE) on paired beam trawls. All SAFEs maintained targeted Metapenaeus macleayi catches, while the largest plastic SAFE significantly reduced total bycatch by 51% and the numbers of Pomatomus saltatrix, Mugil cephalus and Herklotsichthys castelnaui by up to 58%. A redesigned SAFE (‘continuous plastic’) was subsequently tested (against a control) on paired otter trawls, significantly reducing total bycatch by 28% and P. saltatrix and H. castelnaui by up to 42%. The continuous-plastic SAFE also significantly reduced M. macleayi catches by ~7%, but this was explained by ~5% less wing-end spread, and could be simply negated through otter-board refinement. Further work is required to refine the tested SAFEs, and to quantify species-specific escape mechanisms. Nevertheless, the SAFE concept might represent an effective approach for improving penaeid-trawl selectivity.
format Online
Article
Text
id pubmed-4383628
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-43836282015-04-09 A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch McHugh, Matthew J. Broadhurst, Matt K. Sterling, David J. Millar, Russell B. PLoS One Research Article Various plastic strips and sheets (termed ‘simple anterior fish excluders’−SAFEs) were positioned across the openings of penaeid trawls in attempts at reducing the unwanted bycatches of small teleosts. Initially, three SAFEs (a single wire without, and with small and large plastic panels) were compared against a control (no SAFE) on paired beam trawls. All SAFEs maintained targeted Metapenaeus macleayi catches, while the largest plastic SAFE significantly reduced total bycatch by 51% and the numbers of Pomatomus saltatrix, Mugil cephalus and Herklotsichthys castelnaui by up to 58%. A redesigned SAFE (‘continuous plastic’) was subsequently tested (against a control) on paired otter trawls, significantly reducing total bycatch by 28% and P. saltatrix and H. castelnaui by up to 42%. The continuous-plastic SAFE also significantly reduced M. macleayi catches by ~7%, but this was explained by ~5% less wing-end spread, and could be simply negated through otter-board refinement. Further work is required to refine the tested SAFEs, and to quantify species-specific escape mechanisms. Nevertheless, the SAFE concept might represent an effective approach for improving penaeid-trawl selectivity. Public Library of Science 2015-04-02 /pmc/articles/PMC4383628/ /pubmed/25837892 http://dx.doi.org/10.1371/journal.pone.0123124 Text en © 2015 McHugh et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
McHugh, Matthew J.
Broadhurst, Matt K.
Sterling, David J.
Millar, Russell B.
A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch
title A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch
title_full A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch
title_fullStr A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch
title_full_unstemmed A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch
title_short A ‘Simple Anterior Fish Excluder’ (SAFE) for Mitigating Penaeid-Trawl Bycatch
title_sort ‘simple anterior fish excluder’ (safe) for mitigating penaeid-trawl bycatch
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4383628/
https://www.ncbi.nlm.nih.gov/pubmed/25837892
http://dx.doi.org/10.1371/journal.pone.0123124
work_keys_str_mv AT mchughmatthewj asimpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch
AT broadhurstmattk asimpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch
AT sterlingdavidj asimpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch
AT millarrussellb asimpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch
AT mchughmatthewj simpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch
AT broadhurstmattk simpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch
AT sterlingdavidj simpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch
AT millarrussellb simpleanteriorfishexcludersafeformitigatingpenaeidtrawlbycatch