STANDARDIZED CATCH RATES FOR MEDITERRANEAN SWORDFISH (XIPHIAS GLADIUS LINNAEUS, 1758) FROM THE SPANISH LONGLINE FISHERY. 1988-2018

Standardized relative abundance indices for swordfish (Xiphias gladius Linnaeus, 1758) caught by the Spanish surface longline in the western Mediterranean Sea were estimated for the period 1988-2018. Standardized CPUEs in number were estimated through a General Linear Mixed Modeling (GLMM) approach...

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Bibliographic Details
Authors: Saber, Sámar, Macías-López, Ángel David, García-Barcelona, Salvador, Rioja-Garay, Pilar, Gómez-Vives, María José, Godoy-Garrido, María Dolores, Meléndez-Vallejo, María José, Puerto-González, Miguel Ángel, Ortiz-de-Urbina-Gutiérrez, José María
Format: article
Status:Versión aceptada para publicación
Publication Date:2020
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/326493
Online Access:http://hdl.handle.net/10261/326493
Access Level:Open access
Keyword:Swordfish
Centro Oceanográfico de Málaga
Pesquerías
abundance indices
catch/effort
generalized linear mixed model
pelagic longline fisheries
Mediterranean Sea
fish
graphs
data processing
height
Description
Summary:Standardized relative abundance indices for swordfish (Xiphias gladius Linnaeus, 1758) caught by the Spanish surface longline in the western Mediterranean Sea were estimated for the period 1988-2018. Standardized CPUEs in number were estimated through a General Linear Mixed Modeling (GLMM) approach under a negative binomial (NB) error distribution assumption. Standardized CPUEs in biomass were estimated through a General Linear Mixed Modeling (GLMM) approach under a log-normal error distribution assumption. The main factors in the standardization analysis were fishing area and time of the year (quarter). The standardized indices showed notable annual fluctuations without any definite trend for the period under study

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