Scientia Marina, Vol 83, No 4 (2019)

Application of the Gómez-Muñoz model to estimate catch and effort in the artisanal fishery for the squid Loligo vulgaris (Mollusca: Cephalopoda) in the Ría de Vigo (NW Spain)

Natalia Comesaña
Instituto de Investigaciones Marinas, CSIC, Spain

Ángel Guerra
Instituto de Investigaciones Marinas, CSIC, Spain


The Gómez-Muñoz model was developed to aid the management of small-scale or artisanal fisheries and is based on interview data from fishermen and other personnel directly related to the fishery. The non-targeted and targeted Loligo vulgaris fishery in the Ría de Vigo and the Aldán Cove is explored. Eighty-one interviews were carried out. This survey yielded 38 valid interviews, which were used to estimate the parameters of the model for the period 2011-2015. Comparison between official landings and catches estimated by this model showed discrepancies varying between 41.8% and 98.4%, depending on the fish markets considered. An 82.2% decrease of the squid catches over the period 2011-2015 was recorded. The reasons for that drop as well as the sensitivity and accuracy of the model are discussed.


Loligo vulgaris; artisanal fisheries; total catch estimates; catch/effort estimates; Ría de Vigo; NW Spain

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