FN Archimer Export Format PT J TI Engineering development of flexible selectivity grids for Nephrops BT AF LOAEC, Henri MORANDEAU, Fabien MEILLAT, Marc DAVIES, Peter AS 1:1;2:2;3:2;4:1; FF 1:PDG-DOP-DCB-ERT-MS;2:PDG-DOP-DCB-STH-LTH;3:PDG-DOP-DCB-STH-LTH;4:PDG-DOP-DCB-ERT-MS; C1 IFREMER, Ctr Brest, Mat & Struct Grp, French Ocean Res Inst, F-29280 Plouzane, France. IFREMER, Ctr Lorient, Fishing Technol Grp, French Ocean Res Inst, F-56100 Lorient, France. C2 IFREMER, FRANCE IFREMER, FRANCE SI BREST LORIENT SE PDG-DOP-DCB-ERT-MS PDG-DOP-DCB-STH-LTH IN WOS Ifremer jusqu'en 2018 IF 1.216 TC 21 UR https://archimer.ifremer.fr/doc/2006/publication-1690.pdf LA English DT Article DE ;Damage resistance;Polyurethane;Nephrops;Grid;Size selection;By catch;Selectivity AB There are different approaches to selectivity, including increasing cod-end mesh size, square mesh panels and rigid grids. Selectivity grids have traditionally been produced to be as rigid as possible to maintain spacing but this can result in heavy, expensive grids, handling problems and brittleness. This paper presents an alternative approach using flexible polyurethane polymers to produce lightweight inexpensive grids with much improved damage tolerance and ease of handling, which also possess interesting selectivity characteristics. The material selection, design and development tests are described first, then preliminary sea trial results are presented. A flexible grid with a 20 mm spacing between bars performed successfully and enabled a reduction in juvenile catch of 87% by weight to be achieved, but also significant loss of commercial catch. Further development will concentrate on reducing the spacing to optimise selectivity. (c) 2006 Elsevier B.V. All rights reserved. PY 2006 PD JUL SO Fisheries Research SN 0165-7836 PU Elsevier VL 79 IS 1-2 UT 000238401700024 BP 210 EP 218 DI 10.1016/j.fishres.2006.01.011 ID 1690 ER EF