PSVI-12 Ghrelin Plasm Concentrations are Greater in High- vs low-RFI Hampshire Male Lambs within a Transient Surge of Secretion Just Before a Scheduled Meal Feeding

Abstract The aim was to explore potential differences on ghrelin plasm concentrations between efficient and inefficient lambs within a transient surge of secretion just before scheduled meal feeding. Six high- (256±19 g) six low-RFI (-242±19 Hampshire entire male (Age=168±2 d BW=63±5 kg) were taken out 25 individuals in 56-d GrowSafe SystemsÒ feeding trial. After 10-d adaptation once-daily ad-libitum feed offering (0900 h), at d11 three from each RFI group continued the schedule (FED), whereas withheld other (FAST) for 24-h (d11 d12). Blood samples collected via indwelling jugular catheter. In d11, determined by ELISA all animals 0800, 0840, 0900, 1000 1100, d12 1100 FAST group. A linear model repeated measures adjusted with PROC MIXED SAS. Plasm levels began increase groups reached significant difference (P < 0.05) both FED greatest peak 0900 h (3.9±0.2 vs 2.4±0.2 3.9±0.2 3.0±0.2 ng/ml high low RFI, respectively). descendent phase curve group, one hour after feeding, concentration be greater basal h. For averaging maximum end restriction, d12, being 4.9±0.2 ng/mL 3.5±0.2 ones. conclusion, show more pronounced than lambs.