FN Archimer Export Format
PT J
TI Combined replacement of fish meal and oil in practical diets for fast growing juveniles of gilthead sea bream (Sparus aurata L.): Networking of systemic and local components of GH/IGF axis
BT 
AF BENEDITO PALOS, L
   SAERA VILA, A
   CALDUCH GINER, J
   KAUSHIK, Sadasivam
   PEREZ SANCHEZ, J
AS 1:1;2:1;3:1;4:2,3;5:1;
FF 1:;2:;3:;4:;5:;
C1 CSIC, Inst Acuicultura Torre Sal, Dept Biol Culture & Pathol Marine Sci, Castellon de La Plana 12595, Spain.
   Univ Bordeaux 1, IFREMER, INRA, UMR Nutr Aquaculture & Genom, F-64310 St Pee Sur Nivelle, France.
C2 CSIC, SPAIN
   INRA, FRANCE
   IFREMER, FRANCE
SI ST PEE SUR NIVELLE
SE PDG-DOP-DCB-PFOM-ARN
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
   copubli-europe
IF 1.735
TC 126
UR https://archimer.ifremer.fr/doc/2007/publication-5017.pdf
LA English
DT Article
DE ;Contaminants;Endocrine disrupters;Insulin like growth factors;Growth hormone receptors;Growth hormone;Plant proteins;Vegetable oil;Fish oil;Sparidae
AB Growth performance and growth regulatory pathways were examined in juvenile gilthead sea bream fed diets containing largely plant-based ingredients. Four isonitrogenous and isolipidic extruded diets with a low level (20%) of fish meal inclusion were formulated with graded levels of a vegetable oil mixture (17:58:25 of rapeseed: linseed: palm oils) replacing fish oil at 33, 66 and 100% (33VO, 66VO and VO diets). All diets were supplemented with lysine (0.55%) and contained soy lecithin (1%). Daily growth coefficients and feed efficiency over the course of an 11-week trial were almost identical in fish fed the FO, 33VO and 66VO diets. The VO diet reduced feed intake and growth without significant effects in proximate whole body composition, nitrogen or energy retentions. The highest concentration of plasma levels of insulin-like growth factor-I (IGF-I) was found in fish fed the 33VO diet. The lowest concentration was attained in fish fed the VO diet, whereas intermediate values were found in fish fed FO and 66VO diets. An opposite trend was found for circulating levels of growth hormone (GH), probably as a result of a reduced negative feedback inhibition from circulating IGF-I. Hepatic expression of IGF-I and GH receptor type I (GHR-I) was regulated in concert and mRNA levels paralleled plasma levels of IGF-I. Hepatic IGF-II and GHR-II were expressed in a more constitutive manner and no changes at the mRNA level were detected. In the skeletal muscle, IGF-I and GHR-I mRNAs did not vary significantly among groups. By contrast, IGF-II mRNA was up-regulated in fish fed the control diet, whereas the highest amount of GHR-II mRNA was attained in fish fed the 66VO diet. All together, these results suggest different growth compensatory mechanisms mediated by IGF-II and GHR-II at the local tissue level. These new insights prompted us to propose that practical diets low in marine ingredients can be used over the productive cycle of gilthead sea bream when essential fatty acids are supplied above the requirement levels.
PY 2007
PD JUN
SO Aquaculture
SN 0044-8486
PU Elsevier
VL 267
IS 1-4
UT 000248071300022
BP 199
EP 212
DI 10.1016/j.aquaculture.2007.01.011
ID 5017
ER

EF