European purse seiners CPUE standardization of eastern Atlantic skipjack caught under non-owned dFADs using the VAST methodology.

[EN] Abundance index for Eastern Atlantic skipjack was derived from the European purse seiner CPUEs series (2010-2019) for fishing operations made on drifting FADs non-owned by the vessel. By selecting non-owned dFADs only, i.e., dFADs for which the purse seiner has no previous information for detec...

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Bibliographic Details
Authors: Akia, Sosthene, Guéry, L., Pascual-Alayón, Pedro José, Kaplan, D., Ramos, María Lourdes, Uranga, J., Abascal, Francisco Javier, Santiago, J., Merino, G., Gaertner, D.
Format: article
Status:Published version
Publication Date:2022
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/341383
Online Access:http://hdl.handle.net/10261/341383
Access Level:Open access
Keyword:Vector autoregressive spatio-temporal model
Non-owned dFAD
Abundance
CPUE standardization
Purse seiner
Skipjack tuna
Description
Summary:[EN] Abundance index for Eastern Atlantic skipjack was derived from the European purse seiner CPUEs series (2010-2019) for fishing operations made on drifting FADs non-owned by the vessel. By selecting non-owned dFADs only, i.e., dFADs for which the purse seiner has no previous information for detecting the object and on the corresponding aggregated biomass, we relaxed as possible the assumptions on the non-random detection process as well as on the effort creep over the years. The VAST methodology was used to standardized the SKJ CPUE. A GLMM approach has been also applied to compare the outputs when using an alternative modelling approach.

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