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

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 male...

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Bibliographic Details
Published in:Journal of natural history 1998-11, Vol.32 (10-11), p.1431-1437
Main Authors: Bianchini, M.L., Di Stefano, L., Ragonese, S.
Format: Article
Language:English
Subjects:
Aristaeomorpha foliacea
fishery
Marine
Mediterranean Sea
red shrimp
selectivity
trawling
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Summary: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.
ISSN:0022-2933
1464-5262
DOI:10.1080/00222939800770961