FN Archimer Export Format
PT J
TI Interactions between demersal fish body condition and density during the regime shift of the Gulf of Lions
BT 
AF BENSEBAINI, Meriem
   CERTAIN, Gregoire
   BILLET, Norbert
   JADAUD, Angelique
   Gourguet, Sophie
   HATTAB, Tarek
   FROMENTIN, Jean-Marc
AS 1:1;2:1;3:1;4:1;5:2;6:1;7:1;
FF 1:PDG-RBE-MARBEC-LHM;2:PDG-RBE-MARBEC-LHM;3:PDG-RBE-MARBEC-LHM;4:PDG-RBE-MARBEC-LHM;5:PDG-RBE-EM;6:PDG-RBE-MARBEC-LHM;7:PDG-RBE-MARBEC;
C1 UMR 9190 MARBEC, University of Montpellier-IRD-Ifremer-CNRS , Av. Jean Monnet, CS 30171, Sète Cedex 34203, France
   UMR 6308 AMURE, University of Brest-Ifremer, CNRS-IUEM , Rue Dumont d’Urville 29280 Plouzané, France
C2 IFREMER, FRANCE
   IFREMER, FRANCE
SI SETE
   BREST
SE PDG-RBE-MARBEC-LHM
   PDG-RBE-EM
   PDG-RBE-MARBEC
UM AMURE
   MARBEC
IN WOS Ifremer UMR
IF 3.3
TC 2
UR https://archimer.ifremer.fr/doc/00777/88922/94581.pdf
LA English
DT Article
DE ;body condition;demersal fish;dynamic factor analysis;Gulf of Lions;Merluccius merluccius;multivariate autoregressive models
AB  Environmentally driven changes in small pelagic fish condition and size have been observed in the Gulf of Lions (GOL) since 2008, leading to a significant fishery crisis. However, the effect of changes in environment and/or in the small pelagic community on the demersal community remain unknown. For the first time, this study examines the body condition (bc) and population density of 22 demersal species since 1994, using dynamic factor analysis (DFA). Most (but not all) of demersal species have shown a common shift between 2006 and 2009, which is synchronous with that observed in small pelagic species and the environmental conditions in the GOL. It had been concluded that the environmentally driven changes detected in the pelagic fish community also affected the demersal fish community, but with less drastic and lasting consequences. As the DFA revealed that the bc displayed important variations for several species, notably hake (Merlucius merluccius), the interaction between the bc and population density was investigated using the Multivariate Autoregressive (MAR) model on hake population at three life stages (recruits, juveniles, and adults). Results showed that adult bc, while negatively affected by density, had a positive effect on recruitment. So hake bc could have affected population dynamics by promoting higher recruitment at low densities. Further work is needed to ascertain whether such effects exist in other demersal species. 
PY 2022
PD AUG
SO Ices Journal Of Marine Science
SN 1054-3139
PU Oxford University Press (OUP)
VL 79
IS 6
UT 000812400100001
BP 1765
EP 1776
DI 10.1093/icesjms/fsac106
ID 88922
ER

EF