Standardized catch rates for Mediterranean swordfish (Xiphias gladius Linnaeus, 1758) from the Spanish longline fishery. 1988-2017.
2019
Ortiz-de-Urbina-Gutiérrez, José María | Saber, Sámar | García-Alcázar, Santiago | Rioja-Garay, Pilar | Gómez-Vives, María José | Godoy-Garrido, María Dolores | Meléndez-Vallejo, María José | Puerto-González, Miguel Ángel | Macías-López, Ángel David
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 1988-2017. Standardized CPUEs were estimated through a General Linear Mixed Modeling (GLMM) approach under a negative binomial (NB) error distribution assumption. The main factors in the standardization analysis were fishing area and time of the year (quarter). The standardized index showed notable annual fluctuations without any definite trend for the period under study.
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