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Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery

Improving the selectivity of a fishing gear is one technical management measure to significantly reduce by-catch of non-commercial species or undersized individuals. The efficiency of selective device is mainly estimated by comparing species composition, the biomass and length spectrum of caught ind...

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Autores principales: Mouchet, Maud, Poirson, Manon, Morandeau, Fabien, Vogel, Camille, Méhault, Sonia, Kopp, Dorothée
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6713766/
https://www.ncbi.nlm.nih.gov/pubmed/31462717
http://dx.doi.org/10.1038/s41598-019-47117-4
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author Mouchet, Maud
Poirson, Manon
Morandeau, Fabien
Vogel, Camille
Méhault, Sonia
Kopp, Dorothée
author_facet Mouchet, Maud
Poirson, Manon
Morandeau, Fabien
Vogel, Camille
Méhault, Sonia
Kopp, Dorothée
author_sort Mouchet, Maud
collection PubMed
description Improving the selectivity of a fishing gear is one technical management measure to significantly reduce by-catch of non-commercial species or undersized individuals. The efficiency of selective device is mainly estimated by comparing species composition, the biomass and length spectrum of caught individuals and escapees while the functional traits of species are rarely accounted for. Using an innovative technical device to reduce catches of undersized individuals in a multispecific bottom trawl fishery in the Bay of Biscay, namely a T90 mesh cylinder, we measured functional traits on both caught and escaped individuals of 18 species. Using a Principal Component Analysis and K-means partitioning, we clustered species into 6 groups illustrating 6 different locomotion strategies. We identified functional traits related to body size, visual ability and locomotion, differing between caught individuals and escapees using Linear Mixed-effects Models. As expected, escapees were smaller on average but also tended to be more streamlined, with a high position of the eyes and fin features characteristic of manoeuvrability and propulsion. Here, we present how a trait-based approach can shed light on the biological characteristics influencing the efficiency of selective devices.
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spelling pubmed-67137662019-09-13 Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery Mouchet, Maud Poirson, Manon Morandeau, Fabien Vogel, Camille Méhault, Sonia Kopp, Dorothée Sci Rep Article Improving the selectivity of a fishing gear is one technical management measure to significantly reduce by-catch of non-commercial species or undersized individuals. The efficiency of selective device is mainly estimated by comparing species composition, the biomass and length spectrum of caught individuals and escapees while the functional traits of species are rarely accounted for. Using an innovative technical device to reduce catches of undersized individuals in a multispecific bottom trawl fishery in the Bay of Biscay, namely a T90 mesh cylinder, we measured functional traits on both caught and escaped individuals of 18 species. Using a Principal Component Analysis and K-means partitioning, we clustered species into 6 groups illustrating 6 different locomotion strategies. We identified functional traits related to body size, visual ability and locomotion, differing between caught individuals and escapees using Linear Mixed-effects Models. As expected, escapees were smaller on average but also tended to be more streamlined, with a high position of the eyes and fin features characteristic of manoeuvrability and propulsion. Here, we present how a trait-based approach can shed light on the biological characteristics influencing the efficiency of selective devices. Nature Publishing Group UK 2019-08-28 /pmc/articles/PMC6713766/ /pubmed/31462717 http://dx.doi.org/10.1038/s41598-019-47117-4 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Mouchet, Maud
Poirson, Manon
Morandeau, Fabien
Vogel, Camille
Méhault, Sonia
Kopp, Dorothée
Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
title Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
title_full Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
title_fullStr Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
title_full_unstemmed Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
title_short Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
title_sort using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6713766/
https://www.ncbi.nlm.nih.gov/pubmed/31462717
http://dx.doi.org/10.1038/s41598-019-47117-4
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