Design and trial of bottom trawl nets oriented to juvenile escapement
Keywords:Trawl net, selectivity, comparison, Uruguay
Among the fishing methods used by the Uruguayan fishing fleet bottom trawl nets occupy an important place. The aim of this paper is to study alternatives to improve selectivity to allow for a larger escape of juveniles of the target species in a particular fishery. The alternative designs, tested in the Naval and Fisheries Test Channel (CPNyP) of the School of Engineering, show their behaviour quantitatively (resistance of the tunnel and codend at preset speeds) and qualitatively (comparison of behaviour of the different designs proposed). In a parallel manner, trials were conducted at sea in the fishing area with full-scale prototypes. The use of a cover codend to determine the number of juveniles able to escape and the establishment of selectivity indices allowed setting a comparison standard among the designs proposed and the correspondence with the laboratory results.
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Copyright (c) 2014 Jorge Freiría, Julio Chocca, Yamandú Marín, Bernardo González, Gastón Beathyate
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