FN Archimer Export Format
PT J
TI Will global warming affect the functional need for essential fatty acids in juvenile sea bass (Dicentrarchus labrax)? A first overview of the consequences of lower availability of nutritional fatty acids on growth performance
BT 
AF GOURTAY, Clemence
   CHABOT, Denis
   AUDET, Celine
   LE DELLIOU, Herve
   QUAZUGUEL, Patrick
   CLAIREAUX, Guy
   ZAMBONINO-INFANTE, Jose-Luis
AS 1:1,2;2:3;3:1;4:2;5:2;6:4;7:2;
FF 1:PDG-RBE-PFOM-LARN;2:;3:;4:PDG-RBE-PFOM-LARN;5:PDG-RBE-PFOM-LARN;6:;7:PDG-RBE-PFOM-LARN;
C1 Univ Quebec Rimouski, Inst Sci Mer Rimouski, 310 Ursulines, Rimouski, PQ G5L 3A1, Canada.
   Ctr Ifremer Bretagne, Inst Francais Rech Exploitat Mer, LEMAR, UMR6539, F-29280 Plouzane, France.
   Fisheries & Oceans Canada, Inst Maurice Lamontagne, CP 1000, Mont Joli, PQ G5H 3Z4, Canada.
   Univ Bretagne Occidentale, Ctr Ifremer Bretagne, LEMAR, UMR6539, F-29280 Plouzane, France.
C2 UNIV QUEBEC (UQAR-ISMER), CANADA
   IFREMER, FRANCE
   MPO INST MAURICE LAMONTAGNE, CANADA
   UBO, FRANCE
SI BREST
SE PDG-RBE-PFOM-LARN
UM LEMAR
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 2.134
TC 16
UR https://archimer.ifremer.fr/doc/00454/56543/58335.pdf
LA English
DT Article
AB Global climate changes have led to a depletion in omega-3 polyunsaturated fatty acids (n-3 PUFA) in marine phytoplankton that—with food web transfers—could negatively impact fish performance. The aim of this study was to assess the effect of a reduction in the dietary availability of n-3 PUFA on growth performance, organ allometry, and fatty acid composition in juvenile European sea bass (Dicentrarchus labrax) raised at two different temperatures: 15 °C (natural conditions) and 20 °C (global warming scenario). Fish were fed for 5 months with two isoenergetic and isoproteic diets: a reference diet (RD; 1.65% n-3 PUFA on a dry matter basis, DM) used as a proxy of trophic networks where n-3 PUFA were plentiful, and a lower n-3 PUFA diet (LD; 0.73% n-3 PUFA on DM) designed to mimic the expected decrease in n-3 PUFA sources resulting from global climate changes. Results showed decreasing growth rates and slight changes in the muscle polar lipid profile in LD-fed sea bass juveniles, whereas neutral lipids were more affected over the long term. The relative masses of the heart and gastrointestinal system were higher at 20 °C, while liver mass was higher at 15 °C in LD-fed juveniles. However, the mesenteric fat of RD-fed juveniles was higher at 15 °C. Altogether the results suggest that sea bass juveniles are able to implement physiological mechanisms to cope with a decrease in dietary n-3 PUFA and are able to improve growth at the higher temperature, even with a decreased availability of n-3 PUFA. The temperature-driven increase in growth is also observed under the restricted n-3 PUFA diet, and this is accompanied by significant effects on organ allometry and FA profiles. This may indicate the presence of some metabolic costs that remain to be evaluated, but which illustrate that the combination of warming temperatures and n-3 PUFA depletion has significant effects on life history traits. 
PY 2018
PD SEP
SO Marine Biology
SN 0025-3162
PU Springer Heidelberg
VL 165
IS 9
UT 000442025100002
DI 10.1007/s00227-018-3402-3
ID 56543
ER

EF