Stock assessment of the blue jack mackerel, Trachurus picturatus, in the North-eastern Atlantic

Vasconcelos, Joana; Sousa, Ricardo; Riera, Rodrigo; Delgado, João; Faria, Graça; Serrano Gordo, Leonel

http://hdl.handle.net/10400.13/4375

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Authors

Serrano Gordo, Leonel

Abstract(s)

A total of 49,151 blue jack mackerel, Trachurus picturatus, (Bowdich) was collected in Madeira Island (North-eastern Atlantic) between 2002 and 2016 to evaluate pos sible influence of fishing on landings and reproductive parameters. A decreasing trend in the length composition was observed over the study period and length at first maturity decreased by 2.78 cm TL. Maximum yield per recruit decreased from 2002 to 2016 but the corresponding fishing mortality was constant (Fmax = 0.4/ year). Considering the fishing mortality level in 2016, it is evident that the stock may be exploited beyond its sustainability limit. Amendments of the purse-seine fishing regulations and implementation of measures to reduce fishing effort are suggested.

Keywords

Fishing mortality Size and age at first maturity Yield per recruit model . Faculdade de Ciências da Vida

URI

http://hdl.handle.net/10400.13/4375

Citation

Vasconcelos, J., Sousa, R., Riera, R., Delgado, J., Faria, G., & Serrano Gordo, L. (2018). Stock assessment of the blue jack mackerel, Trachurus picturatus, in the North‐eastern Atlantic. Fisheries Management and Ecology, 25(4), 233-239.