FN Archimer Export Format
PT J
TI The environment drives Atlantic bluefin tuna availability in the Gulf of Lions
BT 
AF Rouyer, Tristan
   Bonhommeau, Sylvain
   Bal, Guilaume
   Derridj, Olivier
   Fromentin, Jean-Marc
AS 1:1;2:2;3:3;4:1;5:1;
FF 1:PDG-RBE-MARBEC-LHM;2:PDG-RBE-DOI;3:;4:PDG-RBE-MARBEC-LHM;5:PDG-RBE-MARBEC;
C1 MARBEC, Univ Montpellier, CNRS, IFREMER, IRD Sète ,France
   IFREMER DOI, rue Jean Bertho Le Port, France
   UMS PatriNat (OFB‐CNRS‐MNHN) Brunoy, France
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   MNHN, FRANCE
SI SETE
   LA REUNION
SE PDG-RBE-MARBEC-LHM
   PDG-RBE-DOI
   PDG-RBE-MARBEC
UM MARBEC
IN WOS Ifremer UPR
   WOS Ifremer UMR
   copubli-france
IF 2.67
TC 1
UR https://archimer.ifremer.fr/doc/00683/79500/82157.pdf
LA English
DT Article
DE ;aerial survey;Atlantic Bluefin Tuna;availability;environmental effect;exploitation;Gulf of Lions;index of abundance;migration
AB Atlantic bluefin tuna (ABFT) is a migratory species whose exploitation is affected by its migratory behaviour. ABFT can be found the whole year round in the Gulf of Lions (GoL), with the exception of the May/June/July spawning season. The date at which ABFT fishing resumes in the GoL after spawning is variable and affects both the summer longline fishery and the local aerial survey used to derive a fisheries‐independent index of abundance used in the stock assessment. We investigated whether environmental conditions could explain inter‐annual variability in ABFT availability in the GoL. We focused on Sea surface temperature (SST) and northern wind events looking at changes in the ABFT summer longline fishery start date and quota completion date. Years with weaker northern wind events displayed a higher SST and were associated with a delay in ABFT catch by up to more than one month, whereas the bulk of the catch was completed earlier. A scale‐dependent analysis of the densities of ABFT schools detected during the aerial survey show consistent associations between the short‐term fluctuations in northern wind and SST and the densities of ABFT schools detected. When considering the trends these effects appeared reversed, higher SST and weaker northern wind being associated with an increase in ABFT school density. The implication of these results on the aerial survey and for the exploitation and conservation of ABFT are discussed in the light of the literature on its migratory behaviour in the context of climate change. 
PY 2021
PD SEP
SO Fisheries Oceanography
SN 1054-6006
PU Wiley
VL 30
IS 5
UT 000625647400001
BP 490
EP 498
DI 10.1111/fog.12532
ID 79500
ER

EF