Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location
The English Channel has the highest long-finned squid landings in the Northeast Atlantic, making squid one of the most valuable resources exploited by demersal fisheries operating in this area. This resource consists of two short-lived long-finned squid species: Loligo forbesii and L. vulgaris, whic...
Published in: | Frontiers in Marine Science |
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Frontiers Media SA
2024
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Online Access: | https://archimer.ifremer.fr/doc/00906/101765/112737.pdf https://archimer.ifremer.fr/doc/00906/101765/112738.docx https://doi.org/10.3389/fmars.2024.1433071 https://archimer.ifremer.fr/doc/00906/101765/ |
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ftarchimer:oai:archimer.ifremer.fr:101765 2024-09-30T14:40:04+00:00 Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location Marcout, Anna Foucher, Eric Pierce, Graham J. Robin, Jean-paul 2024-08 application/pdf https://archimer.ifremer.fr/doc/00906/101765/112737.pdf https://archimer.ifremer.fr/doc/00906/101765/112738.docx https://doi.org/10.3389/fmars.2024.1433071 https://archimer.ifremer.fr/doc/00906/101765/ eng eng Frontiers Media SA https://archimer.ifremer.fr/doc/00906/101765/112737.pdf https://archimer.ifremer.fr/doc/00906/101765/112738.docx doi:10.3389/fmars.2024.1433071 https://archimer.ifremer.fr/doc/00906/101765/ info:eu-repo/semantics/openAccess restricted use Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2024-08 , Vol. 11 , P. 1433071 (14p.) squid recruitment English Channel forecasting environment loligo forbesii loligo vulgaris text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.3389/fmars.2024.1433071 2024-09-18T00:09:41Z The English Channel has the highest long-finned squid landings in the Northeast Atlantic, making squid one of the most valuable resources exploited by demersal fisheries operating in this area. This resource consists of two short-lived long-finned squid species: Loligo forbesii and L. vulgaris, which have a similar appearance (they are not distinguished by fishers) but differ in the timing of their life cycle: in L. forbesii, the recruitment peak occurs in July while in L. vulgaris recruitment peak occurs in November. The abundance and distribution of cephalopod species, such as Loligo spp., depends on favourable environmental conditions to support growth, reproduction and successful recruitment. This study investigated the role of several environmental variables (bottom temperature, salinity, current velocity, phosphate and chlorophyll concentrations) on recruitment biomass (in July for L. forbesii and November for L. vulgaris), as based on environmental data for pre-recruitment period from the Copernicus Marine Service and commercial catches of French bottom trawlers during the recruitment period over the years 2000 to 2021. To account for non-linear relationship between environmental descriptors and the biological response, General Additive Models (GAM) were fitted to the data. Separate models were obtained to forecast L. vulgaris and L. forbesii biomass indices during their respective recruitment periods. These models explain a high percentage of variation in biomass indices (65.8% for L. forbesii and 56.7% for L. vulgaris) and may be suitable to forecast the abundance (in terms of biomass) and spatial distribution of the resource. Such forecasts are desirable tools to guide fishery managers. Since these models can be fitted shortly before the start of the fishing season, their routine implementation would take place in real-time fishery management (as promoted by fishery scientists dealing with short-lived species). Article in Journal/Newspaper Northeast Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Frontiers in Marine Science 11 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
squid recruitment English Channel forecasting environment loligo forbesii loligo vulgaris |
spellingShingle |
squid recruitment English Channel forecasting environment loligo forbesii loligo vulgaris Marcout, Anna Foucher, Eric Pierce, Graham J. Robin, Jean-paul Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location |
topic_facet |
squid recruitment English Channel forecasting environment loligo forbesii loligo vulgaris |
description |
The English Channel has the highest long-finned squid landings in the Northeast Atlantic, making squid one of the most valuable resources exploited by demersal fisheries operating in this area. This resource consists of two short-lived long-finned squid species: Loligo forbesii and L. vulgaris, which have a similar appearance (they are not distinguished by fishers) but differ in the timing of their life cycle: in L. forbesii, the recruitment peak occurs in July while in L. vulgaris recruitment peak occurs in November. The abundance and distribution of cephalopod species, such as Loligo spp., depends on favourable environmental conditions to support growth, reproduction and successful recruitment. This study investigated the role of several environmental variables (bottom temperature, salinity, current velocity, phosphate and chlorophyll concentrations) on recruitment biomass (in July for L. forbesii and November for L. vulgaris), as based on environmental data for pre-recruitment period from the Copernicus Marine Service and commercial catches of French bottom trawlers during the recruitment period over the years 2000 to 2021. To account for non-linear relationship between environmental descriptors and the biological response, General Additive Models (GAM) were fitted to the data. Separate models were obtained to forecast L. vulgaris and L. forbesii biomass indices during their respective recruitment periods. These models explain a high percentage of variation in biomass indices (65.8% for L. forbesii and 56.7% for L. vulgaris) and may be suitable to forecast the abundance (in terms of biomass) and spatial distribution of the resource. Such forecasts are desirable tools to guide fishery managers. Since these models can be fitted shortly before the start of the fishing season, their routine implementation would take place in real-time fishery management (as promoted by fishery scientists dealing with short-lived species). |
format |
Article in Journal/Newspaper |
author |
Marcout, Anna Foucher, Eric Pierce, Graham J. Robin, Jean-paul |
author_facet |
Marcout, Anna Foucher, Eric Pierce, Graham J. Robin, Jean-paul |
author_sort |
Marcout, Anna |
title |
Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location |
title_short |
Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location |
title_full |
Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location |
title_fullStr |
Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location |
title_full_unstemmed |
Impact of environmental conditions on English Channel long-finned squid (Loligo spp.) recruitment strength and spatial location |
title_sort |
impact of environmental conditions on english channel long-finned squid (loligo spp.) recruitment strength and spatial location |
publisher |
Frontiers Media SA |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00906/101765/112737.pdf https://archimer.ifremer.fr/doc/00906/101765/112738.docx https://doi.org/10.3389/fmars.2024.1433071 https://archimer.ifremer.fr/doc/00906/101765/ |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Gam |
geographic_facet |
Gam |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2024-08 , Vol. 11 , P. 1433071 (14p.) |
op_relation |
https://archimer.ifremer.fr/doc/00906/101765/112737.pdf https://archimer.ifremer.fr/doc/00906/101765/112738.docx doi:10.3389/fmars.2024.1433071 https://archimer.ifremer.fr/doc/00906/101765/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3389/fmars.2024.1433071 |
container_title |
Frontiers in Marine Science |
container_volume |
11 |
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1811642606039334912 |