FN Archimer Export Format
PT J
TI A cost-benefit analysis of improving trawl selectivity in the case of discards: The Nephrops norvegicus fishery in the Bay of Biscay
BT 
AF MACHER, Claire
   GUYADER, Olivier
   TALIDEC, Catherine
   BERTIGNAC, Michel
AS 1:1,2;2:1;3:3;4:4;
FF 1:;2:PDG-DOP-DCB-EM;3:PDG-DOP-DCB-STH;4:PDG-DOP-DCB-STH-LBH;
C1 IFREMER, Ctr Brest, Dept Econ Maritime, F-29280 Plouzane, France.
   Ctr Droit & Econ Mer, UBO, F-29238 Brest 3, France.
   IFREMER, Stn Lorient, Dept Sci & Technol Halieut, Lab Ressources Halieut, F-56100 Lorient, France.
   IFREMER, Ctr Brest, Dept Sci & Technol Halieut, Lab Biol Pecheries, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   UBO, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
SI BREST
   GUADELOUPE
   LORIENT
SE PDG-DOP-DCB-EM
   PDG-DOP-DCB-STH
   PDG-DOP-DCB-STH-LBH
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.434
TC 38
UR https://archimer.ifremer.fr/doc/2008/publication-4478.pdf
LA English
DT Article
DE ;Fisheries management;Discards;Selectivity;Cost benefit analysis;Bio economic simulations;Nephrops norvegicus
AB The Nephrops trawl fishery is one of the most important fisheries in the Bay of Biscay. The fishery management essentially relies on conservation measures, a total at I owed catch (TAC) for Nephrops together with a mini mum landing size (MLS) and minimum trawl mesh size (70 mm stretched mesh). These measures have failed to prevent high discard levels of many species that characterize the fishery. Nephrops trawlers thus discard about half of their Nephrops catches in numbers (a third in weight) of which only 30% survive. Nephrops discards mainly occur in younger Nephrops age groups below the MLS. This is a waste for the already overexploited Nephrops stock as well as for the fleet. Based on a bio-economic simulation model, the paper analyses the consequences of several scenarios of improving Nephrops selectivity. The potential impacts of these scenarios on Nephrops biomass, landings, discards and economic indicators (e.g. rent) are examined and a cost-benefit analysis of each scenario is carried out. We show that a better exploitation pattern would benefit fisheries that have high level of discards. Reducing non-commercial Nephrops discards leads to positive net present values of rent with better value realized from the production potential and limited short-term losses for the fishing units. By taking account of the economic dynamics of increasing effort however, we show that selectivity measures are insufficient. Regulating access to the fishery is also required to ensure the sustainability of the fishery and a better exploitation of the production potential. (C) 2008 Elsevier B.V. All rights reserved.
PY 2008
PD JUN
SO Fisheries Research
SN 0165-7836
PU Elsevier
VL 92
IS 1
UT 000257628400009
BP 76
EP 89
DI 10.1016/j.fishres.2007.12.021
ID 4478
ER

EF