FN Archimer Export Format
PT J
TI Improving gear selectivity of whiting ( Merlangius merlangus ) on board French demersal trawlers in the English Channel and North Sea
BT 
AF VOGEL, Camille
   KOPP, Dorothee
   MORANDEAU, Fabien
   MORFIN, Marie
   MEHAULT, Sonia
AS 1:1,2;2:1;3:1;4:1;5:1;
FF 1:PDG-RBE-HMMN-RHPEB;2:PDG-RBE-STH-LTBH;3:PDG-RBE-STH-LTBH;4:PDG-RBE-STH-LTBH;5:PDG-RBE-STH-LTBH;
C1 IFREMER, Dept Biol Resources & Environm, Fisheries Sci & Technol Res Unit, Lab Fisheries Technol & Fish Biol RBE STH LTBH, 8 Rue Francois Toullec, F-56100 Lorient, France.
   IFREMER, Dept Biol Resources & Environm Fisheries Sci Engl, Fisheries Resources Lab, Ave Gen de Gaulle, F-14520 Port En Bessin Huppain, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
SI PORT-EN-BESSIN
   LORIENT
SE PDG-RBE-HMMN-RHPEB
   PDG-RBE-STH-LTBH
IN WOS Ifremer jusqu'en 2018
IF 1.874
TC 11
UR https://archimer.ifremer.fr/doc/00384/49553/50079.pdf
LA English
DT Article
DE ;Square mesh;Sorting grids;Fishing gear technology;Merlangius merlangus;Catch comparison;GLMM
AB In the English Channel and Southern Bight, French demersal trawlers target a mix of demersal species including whiting (Merlangius merlangus). The discard ban to be implemented in January 2016 motivated fishermen to look for technical measures to reduce unwanted catches of undersized individuals (<27 cm). From 2008–2014, 18 different gear configurations were tested for bycatch reduction on board fleets of vessels of 16–20 m and 20–24 m. Selective devices tested included grids, square mesh panels (SMP), square mesh cylinders (SMC), various combinations of these devices and large mesh trawls. Using the catch comparison method, our results focus on six devices that proved efficient to reduce catches of undersized whiting, equally divided between the two vessel size groups. Large mesh trawls are not adequate to improve whiting size selectivity with losses of commercial size fish. The mandatory 80-mm SMP was efficient at letting undersized whiting escape from the trawl for both vessel length classes. Its efficiency was enhanced when it was positioned 6–9 m ahead of the codline compared with that placed at 12–15 m. The most appropriate bar spacing for whiting size-selectivity was found in a flexigrid with 23 mm bar spacing, but this required a large portion of square mesh netting to be installed ahead of it (SMP and SMC) to limit catches of undersized individuals. The most promising device tested was an 80 mm SMC, either 2 m long and used alone or 1 m long and used in association with the mandatory SMP; these setups allowed significant escapes of fish up to 25 cm in length. For both SMP and SMC, a mesh size equal to or larger than 100 mm led to losses of commercial size whiting. 
PY 2017
PD SEP
SO Fisheries Research
SN 0165-7836
PU Elsevier Science Bv
VL 193
UT 000404311100021
BP 207
EP 216
DI 10.1016/j.fishres.2017.04.013
ID 49553
ER

EF