6533b7d7fe1ef96bd12683e3

RESEARCH PRODUCT

Trawl mesh selectivity and body engagement pattern in the red shrimpAristaeomorpha foliacea(Risso, 1827) (Crustacea: Decapoda)

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description

The paper presents selectivity data and utilizes an elliptic surface index (maximum height and width of the folded body), in order to explain the selectivity differences between sexes and to investigate the body engagement pattern of the red shrimp Aristaeomorpha foliacea. The results show that males are retained more, with significant differences, and demonstrates a previously unknown morphological difference between sexes (folded males are significantly higher than females of the same carapace length, while the latter are larger, but not significantly, than males of similar size). Nevertheless, in practice the overall escapement rate should not change dramatically with sex, since the resulting ‘elliptic surface’ is not statistically different.