FN Archimer Export Format
PT J
TI Size-selective fishing gear and life history evolution in the Northeast Arctic cod
BT 
AF JORGENSEN, Christian
   ERNANDE, Bruno
   FIKSEN, Oyvind
AS 1:1;2:2;3:1;
FF 1:;2:PDG-DOP-DCMMN-HMMN-RHPEB;3:;
C1 Univ Bergen, Dept Biol, N-5020 Bergen, Norway.
   IFREMER, Lab Ressources Halieut, Port En Bessin, France.
C2 UNIV BERGEN, NORWAY
   IFREMER, FRANCE
SI PORT-EN-BESSIN
SE PDG-DOP-DCMMN-HMMN-RHPEB
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 4.744
TC 78
UR https://archimer.ifremer.fr/doc/2009/publication-6867.pdf
LA English
DT Article
DE ;Life history evolution;Fishing induced changes;Fisheries management;Evolutionary modeling;Energy allocation
AB Industrial fishing has been identified as a cause for life history changes in many harvested stocks, mainly because of the intense fishing mortality and its size-selectivity. Because these changes are potentially evolutionary, we investigate evolutionarily stable life-histories and yield in an energy-allocation state-dependent model for Northeast Arctic cod Gadus morhua. We focus on the evolutionary effects of size-selective fishing because regulation of gear selectivity may be an efficient management tool. Trawling, which harvests fish above a certain size, leads to early maturation except when fishing is low and confined to mature fish. Gillnets, where small and large fish escape, lead to late maturation for low to moderate harvest rates, but when harvest rates increase maturation age suddenly drops. This is because bell-shaped selectivity has two size-refuges, for fish that are below and above the harvestable size-classes. Depending on the harvest rate it either pays to grow through the harvestable slot and mature above it, or mature small below it. Sustainable yield on the evolutionary time-scale is highest when fishing is done by trawling, but only for a small parameter region. Fishing with gillnets is better able to withstand life-history evolution, and maintains yield over a wider range of fishing intensities.
PY 2009
PD AUG
SO Evolutionary applications
SN 1752-4571
PU Wiley-Blackwell publishing, inc
VL 2
IS 3
UT 000270669700009
BP 356
EP 370
DI 10.1111/j.1752-4571.2009.00075.x
ID 6867
ER

EF