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Shrimp trap selectivity in a Mediterranean small-scale-fishery

Journal article
Authors S. Kalogirou
Leif Pihl
C. D. Maravelias
B. Herrmann
C. J. Smith
N. Papadopoulou
E. Notti
A. Sala
Published in Fisheries Research
Volume 211
Pages 131-140
ISSN 0165-7836
Publication year 2019
Published at Department of Biological and Environmental Sciences
Pages 131-140
Language en
Keywords Minimum landing size (MLS), Plesionika, Retention, Selectivity, Small-scale-fisheries, Traps
Subject categories Fish and Aquacultural Science


Small-scale shrimp trap fisheries, which have received very little attention in areas with limited potential for economic diversification, could offer a sustainable and socially beneficial option for profitable businesses in these regions. This study explores the effect of mesh size on selectivity of the commercially important narwal shrimp, Plesionika narval, in the Mediterranean Sea. Three different mesh sizes (8 × 8, 12 × 12 and 12 × 25 mm) were tested in fishing trials, with a theoretical Minimum Landing Size (MLS) using a defined maturity size of 12 mm to support interpretation of the results. Using the retention rates and the estimations on population fractions above and below MLS, we show that the use of the smallest- and largest-sized meshes would not support sustainable or efficient fishery. The results demonstrate a significant decrease in capture probability of undersized narwal shrimps with increased mesh size. The medium-sized mesh traps prove to be the best compromise for the fishery with high catch efficiency of commercial size shrimp and a low capture probability of undersized individuals. The results outlined in this article could be used to develop management plans for small-scale trap fisheries as a basis for developing viable enterprises in remote coastal communities. © 2018 Elsevier B.V.

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