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Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019)

This study summarises six years of spatio-temporal patterns of the discarded demersal community fauna recorded by onboard scientific observer program for both artisanal and industrial crustacean fisheries between 2014 and 2019, from mesophotic to aphotic depths (96 to 650 m) along the southern Humbo...

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Autores principales: Landaeta, Mauricio F., Hernández-Santoro, Carola, Search, Francesca V., Castillo, Manuel I., Bernal, Claudio, Navarrete, Sergio A., Wieters, Evie A., Beldade, Ricardo, Navarro Campoi, Ana, Pérez-Matus, Alejandro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9970059/
https://www.ncbi.nlm.nih.gov/pubmed/36848348
http://dx.doi.org/10.1371/journal.pone.0281932
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author Landaeta, Mauricio F.
Hernández-Santoro, Carola
Search, Francesca V.
Castillo, Manuel I.
Bernal, Claudio
Navarrete, Sergio A.
Wieters, Evie A.
Beldade, Ricardo
Navarro Campoi, Ana
Pérez-Matus, Alejandro
author_facet Landaeta, Mauricio F.
Hernández-Santoro, Carola
Search, Francesca V.
Castillo, Manuel I.
Bernal, Claudio
Navarrete, Sergio A.
Wieters, Evie A.
Beldade, Ricardo
Navarro Campoi, Ana
Pérez-Matus, Alejandro
author_sort Landaeta, Mauricio F.
collection PubMed
description This study summarises six years of spatio-temporal patterns of the discarded demersal community fauna recorded by onboard scientific observer program for both artisanal and industrial crustacean fisheries between 2014 and 2019, from mesophotic to aphotic depths (96 to 650 m) along the southern Humboldt Current System (28–38°S). In this period, one cold and two warm climatic events were observed during the austral summer 2014, 2015–2016 (ENSO Godzilla), and 2016–2017 (coastal ENSO), respectively. Satellite information showed that Chlorophyll-a concentration varied seasonally and latitudinally, associated with upwelling centres, while equatorial wind stress decreased southward of 36°S. Discards were composed of 108 species, dominated by finfish and molluscs. The Chilean hake Merluccius gayi was dominant and ubiquitous (occurrence, 95% of 9104 hauls), being the most vulnerable species of the bycatch. Three assemblages were identified: assemblage 1 (~200 m deep), dominated by flounders Hippoglossina macrops and lemon crabs Platymera gaudichaudii, assemblage 2 (~260 m deep), dominated by squat lobsters Pleuroncodes monodon and Cervimunida johni and assemblage 3 (~320 m depth), dominated by grenadiers Coelorinchus aconcagua and cardinalfish Epigonus crassicaudus. These assemblages were segregated by depth, and varied by year, and geographic zone. The latter represented changes in the width of the continental shelf, increasing southward of 36°S. Alpha-diversity indexes (richness, Shannon, Simpson, and Pielou) also varied with depth and latitude, with higher diversity in deeper continental waters (>300 m), between 2018–2019. Finally, at a spatial scale of tens of kilometres, and a monthly basis, interannual variations of biodiversity occurred in the demersal community. Surface sea temperature, chlorophyll-a, or wind stress did not correlate with discarded demersal fauna diversity of the crustacean fishery operating along central Chile.
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spelling pubmed-99700592023-02-28 Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019) Landaeta, Mauricio F. Hernández-Santoro, Carola Search, Francesca V. Castillo, Manuel I. Bernal, Claudio Navarrete, Sergio A. Wieters, Evie A. Beldade, Ricardo Navarro Campoi, Ana Pérez-Matus, Alejandro PLoS One Research Article This study summarises six years of spatio-temporal patterns of the discarded demersal community fauna recorded by onboard scientific observer program for both artisanal and industrial crustacean fisheries between 2014 and 2019, from mesophotic to aphotic depths (96 to 650 m) along the southern Humboldt Current System (28–38°S). In this period, one cold and two warm climatic events were observed during the austral summer 2014, 2015–2016 (ENSO Godzilla), and 2016–2017 (coastal ENSO), respectively. Satellite information showed that Chlorophyll-a concentration varied seasonally and latitudinally, associated with upwelling centres, while equatorial wind stress decreased southward of 36°S. Discards were composed of 108 species, dominated by finfish and molluscs. The Chilean hake Merluccius gayi was dominant and ubiquitous (occurrence, 95% of 9104 hauls), being the most vulnerable species of the bycatch. Three assemblages were identified: assemblage 1 (~200 m deep), dominated by flounders Hippoglossina macrops and lemon crabs Platymera gaudichaudii, assemblage 2 (~260 m deep), dominated by squat lobsters Pleuroncodes monodon and Cervimunida johni and assemblage 3 (~320 m depth), dominated by grenadiers Coelorinchus aconcagua and cardinalfish Epigonus crassicaudus. These assemblages were segregated by depth, and varied by year, and geographic zone. The latter represented changes in the width of the continental shelf, increasing southward of 36°S. Alpha-diversity indexes (richness, Shannon, Simpson, and Pielou) also varied with depth and latitude, with higher diversity in deeper continental waters (>300 m), between 2018–2019. Finally, at a spatial scale of tens of kilometres, and a monthly basis, interannual variations of biodiversity occurred in the demersal community. Surface sea temperature, chlorophyll-a, or wind stress did not correlate with discarded demersal fauna diversity of the crustacean fishery operating along central Chile. Public Library of Science 2023-02-27 /pmc/articles/PMC9970059/ /pubmed/36848348 http://dx.doi.org/10.1371/journal.pone.0281932 Text en © 2023 Landaeta et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Landaeta, Mauricio F.
Hernández-Santoro, Carola
Search, Francesca V.
Castillo, Manuel I.
Bernal, Claudio
Navarrete, Sergio A.
Wieters, Evie A.
Beldade, Ricardo
Navarro Campoi, Ana
Pérez-Matus, Alejandro
Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019)
title Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019)
title_full Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019)
title_fullStr Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019)
title_full_unstemmed Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019)
title_short Spatio-temporal patterns of the crustacean demersal fishery discard from the south Humboldt Current System, based on scientific observer program (2014–2019)
title_sort spatio-temporal patterns of the crustacean demersal fishery discard from the south humboldt current system, based on scientific observer program (2014–2019)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9970059/
https://www.ncbi.nlm.nih.gov/pubmed/36848348
http://dx.doi.org/10.1371/journal.pone.0281932
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