FN Archimer Export Format
PT J
TI Do environmental conditions (temperature and food composition) affect otolith shape during fish early-juvenile phase? An experimental approach applied to European Seabass (Dicentrarchus labrax)
BT 
AF Mahé, Kelig
   Gourtay, Clemence
   BLED--DEFRUIT, Geoffrey
   Chantre, Celina
   de Pontual, Helene
   Amara, Rachid
   Claireaux, Guy
   Audet, C.
   Zambonino-Infante, Jose-Luis
   Ernande, Bruno
AS 1:1;2:2;3:1;4:1;5:3;6:4;7:5;8:;9:2;10:1,7;
FF 1:PDG-RBE-HMMN-LRHBL;2:;3:PDG-RBE-HMMN-LRHBL;4:PDG-RBE-HMMN-LRHBL;5:PDG-RBE-STH-LBH;6:;7:;8:;9:PDG-RBE-PFOM-LARN;10:PDG-RBE-HMMN-LRHBL;
C1 IFREMER, Centre Manche Mer du Nord, Laboratoire ressources halieutiques, BP 699, 62321 Boulogne-sur-mer, France
   IFREMER, Univ Brest, CNRS, IRD, LEMAR (UMR 6539), CS, 10070, F-29280 Plouzané, France
   IFREMER, Centre de Bretagne, Sciences et Technologies Halieutiques, Z.I. Pointe du Diable, CS, 10070, 29280 Plouzané, France
   Université Littoral Côte d'Opale, Université de Lille, CNRS, UMR 8187, LOG, Laboratoire d'Océanologie et de Géosciences, F-62930 Wimereux, France
   Université de Bretagne Occidentale, CNRS, IRD, Ifremer, LEMAR (UMR 6539) F-29280, CS, 10070, F-29280 Plouzané, France
   Institut des sciences de la mer de Rimouski (ISMER), Université du Québec à Rimouski (UQAR), Rimouski, QC G5L 3A1, Canada
   Evolution and Ecology Program, International Institute for Applied Systems Analysis (IIASA), Schlossplatz 1, A-2361 Laxenburg, Austria
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   UNIV LITTORAL COTE D'OPALE, FRANCE
   UBO, FRANCE
   UNIV QUEBEC (UQAR-ISMER), CANADA
   IIASA, AUSTRIA
SI BOULOGNE
   BREST
SE PDG-RBE-HMMN-LRHBL
   PDG-RBE-STH-LBH
   PDG-RBE-PFOM-LARN
UM LEMAR
IN WOS Ifremer UPR
   WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 2.247
TC 13
UR https://archimer.ifremer.fr/doc/00588/70054/68017.pdf
LA English
DT Article
DE ;n-3 polyunsaturated fatty acids;Otolith shape;Temperature effect;Elliptic Fourier descriptors;Multivariate mixed-effects models;Directional asymmetry
AB Otolith shape is an efficient tool for fish stock discrimination. Therefore, it is crucial to identify the environmental parameters that could influence otolith morphogenesis and growth. Current global ocean warming negatively affects the production of polyunsaturated fatty acids (EPA and DHA) by phytoplankton and thus their availability in marine food webs. As EPA and DHA are essential nutrients for most fish species, their deficiency could affect many aspects of fish physiology, notably otolith morphogenesis. The goal of this study was to assess experimentally the combined influences of temperature (T) and dietary polyunsaturated fatty acid (PUFA) content on European seabass (Dicentrarchus labrax) otolith morphogenesis during early life stages. 300 individuals were reared from 94 to 200 days post hatch (dph) at 15 or 20 °C and fed a high (1.65% PUFA) or low (0.73% PUFA) nutrient diet. To analyze the temperature effect, Growing Degree Days (GDD) were used. Otolith morphometric measurements, shape factors and normalized Elliptical Fourier coefficients describing outline shape were extracted using image analysis. The directional asymmetry (DA) between left and right otolith shapes was not significantly correlated to the GDD or food nutrient level. The effects of T and PUFA on otolith shape were estimated using four linear mixed effects models and, for all descriptors of otolith outline, the best model included GDD, PUFA and T and their interaction as predictors. This temperature effect was described by GDD value and the interaction between GDD and T. Consequently, temperature has an effect on the speed but also on the morphogenesis trajectory of the otolith. Conversely, the concentration of PUFA in the diet had no significant effect on otolith shape. The otolith shape was first modified by a decrease in the width/length ratio during the first period of experiment and by the distance between rostrum and antirostrum during the second period of experiment. Our results indicate that otolith shape is very sensitive to environmental temperature and, as such, can be an effective tool for identifying fish stocks that have experienced different temperature regimes. 
PY 2019
PD DEC
SO Journal Of Experimental Marine Biology And Ecology
SN 0022-0981
PU Elsevier BV
VL 521
UT 000497257000006
DI 10.1016/j.jembe.2019.151239
ID 70054
ER

EF