Estimation of basket trap selectivity for changeable nassa (Nassarius mutabilis) in the Adriatic Sea

摘要: Abstract Size selectivity of basket traps for changeable nassa ( Nassarius mutabilis ) was estimated through comparative fishing trials with varying in mesh size and net colour. Selectivity curves two commercial (19 mm white twine 19 mm black twine) three experimental (23, 26 28 mm were using SELECT method. In addition, theoretical size-selectivity calculated from morphometric data a simplified version Sechin Differing the opinion fishermen, N. did not show any preference dark coloured twine. Retention method had very sharp well fitted catch all cases. Theoretical close to obtained data. The types curve similar shape, although ones shifted towards larger classes showed slightly steeper slope than curves. commonly used by fishermen is adequate rationally exploiting resource, as catches mainly included undersized specimens, whilst 23 26 mm sizes would represent good compromise between reduced occurrence individuals satisfactory yields product.