Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean)
Monthly landings and effort data from the Barcelona trawl fleet (NW Mediterranean) were selected to analyse and standardize the landings per unit effort (LPUE) of the red shrimp (Aristeus antennatus) using generalized additive models. The dataset covers a span of 15 years (1994-2008) and consists of...
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Consejo Superior de Investigaciones Científicas
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ftdoajarticles:oai:doaj.org/article:fff4899412f14fbe86fb8659dc7f321c 2023-05-15T17:35:09+02:00 Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean) Valeria Mamouridis Francesc Maynou Germán Aneiros Pérez 2014-03-01T00:00:00Z https://doi.org/10.3989/scimar.03926.14A https://doaj.org/article/fff4899412f14fbe86fb8659dc7f321c EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1493 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.03926.14A https://doaj.org/article/fff4899412f14fbe86fb8659dc7f321c Scientia Marina, Vol 78, Iss 1, Pp 7-16 (2014) lpue standardized lpue aristeus antennatus generalized additive models nw mediterranean deep-water fisheries Aquaculture. Fisheries. Angling SH1-691 article 2014 ftdoajarticles https://doi.org/10.3989/scimar.03926.14A 2022-12-31T15:29:15Z Monthly landings and effort data from the Barcelona trawl fleet (NW Mediterranean) were selected to analyse and standardize the landings per unit effort (LPUE) of the red shrimp (Aristeus antennatus) using generalized additive models. The dataset covers a span of 15 years (1994-2008) and consists of a broad spectrum of predictors: fleet-dependent (e.g. number of trips performed by vessels and their technical characteristics, such as the gross registered tonnage), temporal (inter- and intra-annual variability), environmental (North Atlantic Oscillation [NAO] index) and economic (red shrimp and fuel prices) variables. All predictors individually have an impact on LPUE, though some of them lose their predictive power when considered jointly. That is the case of the NAO index. Our results show that six variables from the whole set can be incorporated into a global model with a total explained deviance (ED) of 43%. We found that the most important variables were effort-related predictors (trips, tonnage, and groups) with a total ED of 20.58%, followed by temporal variables, with an ED of 13.12%, and finally the red shrimp price as an economic predictor with an ED of 9.30%. Taken individually, the main contributing variable was the inter-annual variability (ED=12.40%). This high ED value suggests that many factors correlated with inter-annual variability, such as environmental factors (the NAO in specific years) and fuel price, could in turn affect LPUE variability. The standardized LPUE index with the effort variability removed was found to be similar to the fishery-independent abundance index derived from the MEDITS programme. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Scientia Marina 78 1 7 16 |
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language |
English |
topic |
lpue standardized lpue aristeus antennatus generalized additive models nw mediterranean deep-water fisheries Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
lpue standardized lpue aristeus antennatus generalized additive models nw mediterranean deep-water fisheries Aquaculture. Fisheries. Angling SH1-691 Valeria Mamouridis Francesc Maynou Germán Aneiros Pérez Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean) |
topic_facet |
lpue standardized lpue aristeus antennatus generalized additive models nw mediterranean deep-water fisheries Aquaculture. Fisheries. Angling SH1-691 |
description |
Monthly landings and effort data from the Barcelona trawl fleet (NW Mediterranean) were selected to analyse and standardize the landings per unit effort (LPUE) of the red shrimp (Aristeus antennatus) using generalized additive models. The dataset covers a span of 15 years (1994-2008) and consists of a broad spectrum of predictors: fleet-dependent (e.g. number of trips performed by vessels and their technical characteristics, such as the gross registered tonnage), temporal (inter- and intra-annual variability), environmental (North Atlantic Oscillation [NAO] index) and economic (red shrimp and fuel prices) variables. All predictors individually have an impact on LPUE, though some of them lose their predictive power when considered jointly. That is the case of the NAO index. Our results show that six variables from the whole set can be incorporated into a global model with a total explained deviance (ED) of 43%. We found that the most important variables were effort-related predictors (trips, tonnage, and groups) with a total ED of 20.58%, followed by temporal variables, with an ED of 13.12%, and finally the red shrimp price as an economic predictor with an ED of 9.30%. Taken individually, the main contributing variable was the inter-annual variability (ED=12.40%). This high ED value suggests that many factors correlated with inter-annual variability, such as environmental factors (the NAO in specific years) and fuel price, could in turn affect LPUE variability. The standardized LPUE index with the effort variability removed was found to be similar to the fishery-independent abundance index derived from the MEDITS programme. |
format |
Article in Journal/Newspaper |
author |
Valeria Mamouridis Francesc Maynou Germán Aneiros Pérez |
author_facet |
Valeria Mamouridis Francesc Maynou Germán Aneiros Pérez |
author_sort |
Valeria Mamouridis |
title |
Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean) |
title_short |
Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean) |
title_full |
Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean) |
title_fullStr |
Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean) |
title_full_unstemmed |
Analysis and standardization of landings per unit effort of red shrimp Aristeus antennatus from the trawl fleet of Barcelona (NW Mediterranean) |
title_sort |
analysis and standardization of landings per unit effort of red shrimp aristeus antennatus from the trawl fleet of barcelona (nw mediterranean) |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
2014 |
url |
https://doi.org/10.3989/scimar.03926.14A https://doaj.org/article/fff4899412f14fbe86fb8659dc7f321c |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Scientia Marina, Vol 78, Iss 1, Pp 7-16 (2014) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1493 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.03926.14A https://doaj.org/article/fff4899412f14fbe86fb8659dc7f321c |
op_doi |
https://doi.org/10.3989/scimar.03926.14A |
container_title |
Scientia Marina |
container_volume |
78 |
container_issue |
1 |
container_start_page |
7 |
op_container_end_page |
16 |
_version_ |
1766134223080521728 |