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Preliminary report on a specially designed Nephrops trawl for releasing undersized roundfish
Symonds, D.J.; Simpson, A.C. (1971). Preliminary report on a specially designed Nephrops trawl for releasing undersized roundfish. C.M. - Int. Counc. Explor. Sea CM 1976(B:6): 1-8
In: ICES CM Documents - ICES. ICES: Copenhagen. ISSN 1015-4744, more

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Keywords
    Mesh selectivity; Size; Trawl nets; Merlangius merlangus (Linnaeus, 1758) [WoRMS]; Nephrops Leach, 1814 [WoRMS]; Marine

Authors  Top 
  • Symonds, D.J.
  • Simpson, A.C.

Abstract
    Results are presented of trials with n specially designed Nephrops trawl having a 70 mm mesh in its upper surface and top cod-end, to release undersized roundfish (particularly whiting), and a 50 mm mesh in its lower surface and bottom cod-end, to retain Nephrops. The two cod-ends were separated by a 50 mm mesh partition and kept open by a metal oval hoop. In general, good separation of whiting from Nephrops was obtained. In addition large numbers of undersized roundfish escaped from the top cod-end. The advantages and disadvantages of this gear over existing Nephrops trawls are discussed briefly.

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