FN Archimer Export Format
PT J
TI Modelling axisymmetric cod-ends made of different mesh types
BT 
AF PRIOUR, Daniel
   HERRMANN, B.
   O'NEILL, F. G.
AS 1:1;2:2;3:3;
FF 1:PDG-DOP-DCB-STH-LTH;2:;3:;
C1 IFREMER, French Inst Marine Res, F-29280 Plouzane, France.
   Danish Inst Fisheries Res DIFRES, N Sea Ctr, Hirtshals, Denmark.
   Fisheries Res Serv, Marine Lab, Aberdeen, Scotland.
C2 IFREMER, FRANCE
   DIFRES, DENMARK
   FRS, UK
SI BREST
SE PDG-DOP-DCB-STH-LTH
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 0.259
TC 5
UR https://archimer.ifremer.fr/doc/00006/11757/8497.pdf
LA English
DT Article
DE ;cod-ends;mesh shape;trawl selectivity simulation;bycatch reduction;twine tensions;catch force
AB Cod-ends are the rearmost part of trawl fishing gears. They collect the catch, and for many important species it is where fish selection takes place. Generally speaking they are axisymmetric, and their shape is influenced by the catch volume, the mesh shape, and the material characteristics. The shape of cod-ends is of importance as it determines mesh opening and consequently influences the selectivity of fish from the cod-end. Selectivity is the process whereby a gear retains large fish and releases small ones. In recent years, as many fish stocks have become more threatened, understanding the selectivity process has become more important. This paper presents a model of the deformation of an axisymmetric cod-end. The twine tension and the catch pressure acting on the knots of each mesh along the cod-end profile are calculated, and a Newton-Raphson scheme is used to estimate the equilibrium position of the netting. The software package developed to solve this problem is freely available. Comparisons are carried out with a previous model and experimental data.
PY 2009
PD FEB
SO Proceedings Of The Institution Of Mechanical Engineers Part M-journal Of Engineering For The Maritime Environment
SN 1475-0902
PU Professional Engineering Publishing Ltd
VL 223
IS M1
UT 000278880500010
BP 137
EP 144
DI 10.1243/14750902JEME120
ID 11757
ER

EF