Towards a spatial integrated stock assessment model for European hake northern stock
European hake (Merluccius merluccius) is a key species in the management of several mixed fisheries in the north-east Atlantic where regional spatial management plans are being set up. The wide spatial distribution of hake and the lack of knowledge of some processes involved in its spatial dynamics...
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ftccsdartic:oai:HAL:hal-04202033v1 2024-02-11T10:06:54+01:00 Towards a spatial integrated stock assessment model for European hake northern stock Vigier, Audric Mahevas, Stephanie Bertignac, Michel Écologie et Modèles pour l'Halieutique (EMH) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Sciences et Technologies Halieutiques (STH) 2018-03 https://hal.science/hal-04202033 https://doi.org/10.1016/j.fishres.2017.12.001 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2017.12.001 hal-04202033 https://hal.science/hal-04202033 doi:10.1016/j.fishres.2017.12.001 ISSN: 0165-7836 EISSN: 1872-6763 Fisheries Research https://hal.science/hal-04202033 Fisheries Research, 2018, 199, pp.158-170. ⟨10.1016/j.fishres.2017.12.001⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.1016/j.fishres.2017.12.001 2024-01-20T23:59:40Z European hake (Merluccius merluccius) is a key species in the management of several mixed fisheries in the north-east Atlantic where regional spatial management plans are being set up. The wide spatial distribution of hake and the lack of knowledge of some processes involved in its spatial dynamics could hamper the assessment and management of hake.To help understand the processes, we implemented a spatial version of the Stock Synthesis stock assessment model for northern hake, including available data on this stock and the associated fisheries. For the 1978–2012 time series, the model distinguished the Bay of Biscay, the Celtic Sea and a northern area aggregating the West of Scotland and the North Sea. The model considered an age-structured population for each age class and area, a seasonal migration, global recruitment allocated to areas and fishing fleets for each area. Parameters for stock and exploitation spatio-temporal dynamics were estimated by likelihood maximization for each quarter and area.The comparison of spatial and non spatial models goodness of fit showed they were close, although the fit to abundance indices slightly improved with the spatial model.Fishing mortalities, spawning stock biomasses and recruitments were slightly different from the current assessment model estimates, essentially at the beginning and the end of the time series. On average over the time series, fishing mortality estimates relative to the abundance were higher in the Bay of Biscay than elsewhere, spawning stock biomass estimates were higher in the Celtic Sea than elsewhere, and recruitment occurred mainly in the Bay of Biscay. Finally, the final spatial model estimated a strong movement from the northern area to the Celtic Sea. The final spatial model is a step towards a spatial assessment and management of the stock. Article in Journal/Newspaper North East Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Hake ENVELOPE(15.612,15.612,66.797,66.797) Fisheries Research 199 158 170 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDV]Life Sciences [q-bio] |
spellingShingle |
[SDV]Life Sciences [q-bio] Vigier, Audric Mahevas, Stephanie Bertignac, Michel Towards a spatial integrated stock assessment model for European hake northern stock |
topic_facet |
[SDV]Life Sciences [q-bio] |
description |
European hake (Merluccius merluccius) is a key species in the management of several mixed fisheries in the north-east Atlantic where regional spatial management plans are being set up. The wide spatial distribution of hake and the lack of knowledge of some processes involved in its spatial dynamics could hamper the assessment and management of hake.To help understand the processes, we implemented a spatial version of the Stock Synthesis stock assessment model for northern hake, including available data on this stock and the associated fisheries. For the 1978–2012 time series, the model distinguished the Bay of Biscay, the Celtic Sea and a northern area aggregating the West of Scotland and the North Sea. The model considered an age-structured population for each age class and area, a seasonal migration, global recruitment allocated to areas and fishing fleets for each area. Parameters for stock and exploitation spatio-temporal dynamics were estimated by likelihood maximization for each quarter and area.The comparison of spatial and non spatial models goodness of fit showed they were close, although the fit to abundance indices slightly improved with the spatial model.Fishing mortalities, spawning stock biomasses and recruitments were slightly different from the current assessment model estimates, essentially at the beginning and the end of the time series. On average over the time series, fishing mortality estimates relative to the abundance were higher in the Bay of Biscay than elsewhere, spawning stock biomass estimates were higher in the Celtic Sea than elsewhere, and recruitment occurred mainly in the Bay of Biscay. Finally, the final spatial model estimated a strong movement from the northern area to the Celtic Sea. The final spatial model is a step towards a spatial assessment and management of the stock. |
author2 |
Écologie et Modèles pour l'Halieutique (EMH) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Sciences et Technologies Halieutiques (STH) |
format |
Article in Journal/Newspaper |
author |
Vigier, Audric Mahevas, Stephanie Bertignac, Michel |
author_facet |
Vigier, Audric Mahevas, Stephanie Bertignac, Michel |
author_sort |
Vigier, Audric |
title |
Towards a spatial integrated stock assessment model for European hake northern stock |
title_short |
Towards a spatial integrated stock assessment model for European hake northern stock |
title_full |
Towards a spatial integrated stock assessment model for European hake northern stock |
title_fullStr |
Towards a spatial integrated stock assessment model for European hake northern stock |
title_full_unstemmed |
Towards a spatial integrated stock assessment model for European hake northern stock |
title_sort |
towards a spatial integrated stock assessment model for european hake northern stock |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-04202033 https://doi.org/10.1016/j.fishres.2017.12.001 |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Hake |
geographic_facet |
Hake |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
ISSN: 0165-7836 EISSN: 1872-6763 Fisheries Research https://hal.science/hal-04202033 Fisheries Research, 2018, 199, pp.158-170. ⟨10.1016/j.fishres.2017.12.001⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2017.12.001 hal-04202033 https://hal.science/hal-04202033 doi:10.1016/j.fishres.2017.12.001 |
op_doi |
https://doi.org/10.1016/j.fishres.2017.12.001 |
container_title |
Fisheries Research |
container_volume |
199 |
container_start_page |
158 |
op_container_end_page |
170 |
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1790604927967428608 |