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Validation of the macroscopic maturity stages for blue jack mackerel, Trachurus picturatus (Bowdich, 1825), according to histological examination

Validação dos estados de maturação macroscópicos de carapau negrão, Trachurus picturatus (Bowdich, 1825), de acordo com a identificação microscópica
Authors: Feijó, Diana; Silva, Carmo Nunes; Correia, Georgina; Inácio, Mónica; Abreu, Paula; Costa, Ana Maria;

Validation of the macroscopic maturity stages for blue jack mackerel, Trachurus picturatus (Bowdich, 1825), according to histological examination

Abstract

A gestão das pescarias requer a correta identificação dos estados de maturação dos peixes. As metodologias aplicadas devem ser padronizadas e todas as incertezas quanto à identificação macroscópica devem ser validadas por observação microscópica. Este trabalho propõe uma escala microscópica de maturação para o carapau-negrão (Trachurus picturatus, Bowdich, 1825), baseada em indivíduos recolhidos por arrastões comerciais no norte de Portugal. Após a atribuição do estado de maturação macroscópico, as gónadas foram processadas para observação histológica. As lâminas foram observadas e as gónadas classificadas em 6 estados de acordo com a escala de maturação de Walsh et al. (1990). Os correspondentes estados de maturação macroscópicos e microscópicos foram descritos. É também apresentada a correspondência com a nova escala de maturação apresentada no WKASMSF (ICES, 2018), que é obrigatória no reporte dos dados de maturação às bases de dados do ICES (desde o dia 1 de Janeiro de 2020).

The 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).

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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Green