Percorrer por autor "Correia, Georgina"
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- Validation of the macroscopic maturity stages for blue jack mackerel, Trachurus picturatus (Bowdich, 1825), according to histological examinationPublication . Feijó, Diana; Silva, Carmo Nunes; Correia, Georgina; Inácio, Mónica; Abreu, Paula; Costa, Ana Maria; Instituto Português do Mar e da AtmosferaThe assessment of fisheries resources requires the correct identification of fish maturity stages. The methodologies applied should be standardised and all uncertainty regarding macroscopic identification should be validated by microscopic observation. This work proposes a microscopic maturity scale for the blue jack mackerel (Trachurus picturatus, Bowdich, 1825), based on individuals collected by commercial bottom trawl in northern Portugal. After assigning the macroscopic maturity stage, the gonads were processed for histological observation. The slides were observed and the gonads were classified into 6 stages according to Walsh et al. (1990). The corresponding macroscopic and microscopic maturity stages were described. The correspondence to the new maturity scale presented at WKASMSF (ICES, 2018) is also presented, which is mandatory when reporting maturity data to ICES databases (since the 1st. January 2020).