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

Authors: Saber, S. (Sámar); Macías-López, A.D. (Ángel David); García-Barcelona, S. (Salvador); Rioja-Garay, P. (Pilar); Gómez-Vives, M.J. (María José); Godoy-Garrido, M.D. (María Dolores); Meléndez-Vallejo, M.J. (María José); +2 Authors

handle: 10261/326493 , 10261/326610 , 10508/14966 , 10508/11810

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

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Abstract

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

SI

Country

Spain

Related Organizations

Spanish Institute of Oceanography
Spain
Spanish National Research Council
Spain

Keywords

Swordfish, fish, graphs, Centro Oceanográfico de Málaga, generalized linear mixed model, pelagic longline fisheries, Mediterranean Sea, catch/effort, Pesquerías, abundance indices, data processing, height

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