Design and trial of bottom trawl nets oriented to juvenile escapement

Authors

  • Jorge Freiría Facultad de Ingeniería, Universidad de la República, Uruguay
  • Julio Chocca Dirección Nacional de Recursos Acuáticos (DINARA)
  • Yamandú Marín Dirección Nacional de Recursos Acuáticos (DINARA)
  • Bernardo González Dirección Nacional de Recursos Acuáticos (DINARA)
  • Gastón Beathyate Dirección Nacional de Recursos Acuáticos (DINARA)

Keywords:

Trawl net, selectivity, comparison, Uruguay

Abstract

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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Author Biography

Julio Chocca, Dirección Nacional de Recursos Acuáticos (DINARA)

ingenieria pesquera

selectividad

Published

2014-12-29

How to Cite

1.
Freiría J, Chocca J, Marín Y, González B, Beathyate G. Design and trial of bottom trawl nets oriented to juvenile escapement. Mar Fish Sci [Internet]. 2014Dec.29 [cited 2021Apr.15];25:59-73. Available from: https://ojs.inidep.edu.ar/index.php/mafis/article/view/73

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