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Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna

Catch-per-unit-effort (CPUE) is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF) is a seasonal target spe...

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Autores principales: Chang, Shui-Kai, Liu, Hung-I, Fukuda, Hiromu, Maunder, Mark N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5624633/
https://www.ncbi.nlm.nih.gov/pubmed/28968434
http://dx.doi.org/10.1371/journal.pone.0185784
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author Chang, Shui-Kai
Liu, Hung-I
Fukuda, Hiromu
Maunder, Mark N.
author_facet Chang, Shui-Kai
Liu, Hung-I
Fukuda, Hiromu
Maunder, Mark N.
author_sort Chang, Shui-Kai
collection PubMed
description Catch-per-unit-effort (CPUE) is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF) is a seasonal target species in the Taiwanese longline fishery. Since 2010, detailed catch information for each PBF has been made available through a catch documentation scheme. However, previously, only market landing data with a low coverage of logbooks were available. Therefore, several nontraditional procedures were performed to reconstruct catch and effort data from many alternative data sources not directly obtained from fishers for 2001–2015: (1) Estimating the catch number from the landing weight for 2001–2003, for which the catch number information was incomplete, based on Monte Carlo simulation; (2) deriving fishing days for 2007–2009 from voyage data recorder data, based on a newly developed algorithm; and (3) deriving fishing days for 2001–2006 from vessel trip information, based on linear relationships between fishing and at-sea days. Subsequently, generalized linear mixed models were developed with the delta-lognormal assumption for standardizing the CPUE calculated from the reconstructed data, and three-stage model evaluation was performed using (1) Akaike and Bayesian information criteria to determine the most favorable variable composition of standardization models, (2) overall R(2) via cross-validation to compare fitting performance between area-separated and area-combined standardizations, and (3) system-based testing to explore the consistency of the standardized CPUEs with auxiliary data in the PBF stock assessment model. The last stage of evaluation revealed high consistency among the data, thus demonstrating improvements in data reconstruction for estimating the abundance index, and consequently the stock assessment.
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spelling pubmed-56246332017-10-17 Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna Chang, Shui-Kai Liu, Hung-I Fukuda, Hiromu Maunder, Mark N. PLoS One Research Article Catch-per-unit-effort (CPUE) is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF) is a seasonal target species in the Taiwanese longline fishery. Since 2010, detailed catch information for each PBF has been made available through a catch documentation scheme. However, previously, only market landing data with a low coverage of logbooks were available. Therefore, several nontraditional procedures were performed to reconstruct catch and effort data from many alternative data sources not directly obtained from fishers for 2001–2015: (1) Estimating the catch number from the landing weight for 2001–2003, for which the catch number information was incomplete, based on Monte Carlo simulation; (2) deriving fishing days for 2007–2009 from voyage data recorder data, based on a newly developed algorithm; and (3) deriving fishing days for 2001–2006 from vessel trip information, based on linear relationships between fishing and at-sea days. Subsequently, generalized linear mixed models were developed with the delta-lognormal assumption for standardizing the CPUE calculated from the reconstructed data, and three-stage model evaluation was performed using (1) Akaike and Bayesian information criteria to determine the most favorable variable composition of standardization models, (2) overall R(2) via cross-validation to compare fitting performance between area-separated and area-combined standardizations, and (3) system-based testing to explore the consistency of the standardized CPUEs with auxiliary data in the PBF stock assessment model. The last stage of evaluation revealed high consistency among the data, thus demonstrating improvements in data reconstruction for estimating the abundance index, and consequently the stock assessment. Public Library of Science 2017-10-02 /pmc/articles/PMC5624633/ /pubmed/28968434 http://dx.doi.org/10.1371/journal.pone.0185784 Text en © 2017 Chang et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://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
Chang, Shui-Kai
Liu, Hung-I
Fukuda, Hiromu
Maunder, Mark N.
Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna
title Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna
title_full Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna
title_fullStr Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna
title_full_unstemmed Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna
title_short Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna
title_sort data reconstruction can improve abundance index estimation: an example using taiwanese longline data for pacific bluefin tuna
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5624633/
https://www.ncbi.nlm.nih.gov/pubmed/28968434
http://dx.doi.org/10.1371/journal.pone.0185784
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