PSIX-9 The Effect of Endophyte-Infected Tall Fescue Seed Consumption on gut and Satiety Hormones Related to Intake in Holstein Steers

Abstract The objective of this study was to evaluate the impact endophyte-infected tall fescue (E+) seed, and ergovaline (ERV), on gut satiety hormones investigate changes in post-absorptive metabolism. Holstein steers (n=12; 260 ± 16 kg) were assigned one three treatments (ERV concentration diet dry matter): 0, 1.8, 2.7 ppm with animals being adapted an indoor environment for 4 days followed by a 7-day adaptation 10-day treatment period. On 17, blood collected via jugular catheters at 20-min intervals 8 hours beginning 1 hour pre-feeding. Plasma extracted analyzed insulin, leptin, active ghrelin. Non-esterified fatty acids (NEFA), b-hydroxybutyrate (BHB), glucose postabsorptive metabolism using plasma from each 60-min interval. DMI decreased linearly increased ERV (P< 0.0001). A quadratic increase observed insulin having greatest concentrations response leptin where 1.8 had Active ghrelin increasing (P=0.047). treatment-by-time interaction NEFA 0.0001) pre-feeding 1-hour post-feeding did not differ control thereafter whereas, above 0 5 among all 6 post-feeding. exhibited least BHB (P=0.029). Glucose (P=0.046). These results indicate that consumption E+ seed decreases intake which may be possible through alteration also alter