Relationship between leptin and carcass quality and yield grade in a population of Certified Angus Beef–type cattle. D. L. McNamara*1, T. B. Schmidt3, E. L. Walker4, M. M. Rolf1, A. N. Brauch1, W. Pittroff , and D. H. Keisler1, 1University of Missouri, Columbia, 2University of California, Davis, 3Mississippi State University, Starkville, 4Missouri State University, Springfield.
Variation in maintenance energy requirements of gestating beef cows and relationships with calf performance and plasma IGF-I. M. J. Prado-Cooper*, N. M. Long, R. P. Wettemann, G. W. Horn, L. J. Spicer, and C. R. Krehbiel, Oklahoma Agricultural Experiment Station.
Negative energy balance increases prandial ghrelin and growth hormone concentrations in lactating dairy cows. B. J. Bradford* and M. S. Allen, Michigan State University, East Lansing.
Effect of ghrelin and obestatin infusion on milk production, body condition score, and energy balance in dairy cows. J. R. Roche*1,2, A. J. Sheahan1, L. M. Chagas1, D. Blache3, D. P. Berry , and J. K. Kay1, 1Dexcel, New Zealand, 2University of Tasmania, Australia, 3University of Western Australia, Australia, Teagasc Moorepark, Ireland.
Expression of ghrelin and the growth hormone secretagogue receptor 1a (GHS-R1a) in the reproductive tissues of Holstein heifers. M. L. Rhoads*, J. B. Wheelock, L. L. Hernandez, R. P. Rhoads, and R. J. Collier, University of Arizona, Tucson.
Seasonal effects on twenty-four hour patterns of melatonin in blood and milk of dairy cows. N. Castro*1,2, M. T. Kollmann3, V. Lollivier4, S. Richter1, A. Baumert1, O. Wellnitz1, and R. M. Bruckmaier3, 1University of Bern, Bern, Switzerland, 2Las Palmas de Gran canaria University, Las Palmas, Spain, 3Technical University Munich, Germany, 4INRA, France.
Effect of restricted feeding and monopropylene glycol postpartum on metabolic hormones and postpartum anoestrus in grazing dairy heifers. L. M. Chagas*1, P. J. S. Gore1, K. A. Macdonald1, and D. Blache2, 1Dexcel Limited, Hamilton, New Zealand, 2The University of Western Australia, Crawley, Australia.
Hypothalamic genes expression in early- and late-maturing Bos indicus heifers. A. Vaiciunas*1, L. L. Coutinho2, and L. F. P. Silva1, 1University of São Paulo, Pirassununga, SP, Brazil, 2University of São Paulo, Piracicaba, SP, Brazil.
Evaluating reproductive and immune consequences of endocrine disrupting chemicals in an avian bioassay. M. A. Ottinger*1, E. T. Lavoie1, and M. J. Quinn2, 1University of Maryland, College Park, 2U.S. Army Center for Health Promotion and Preventive Medicine, Aberdeen, MD.
Differential expression of adiponectin, adiponectin receptor 1 (AdipoR1) and leptin mRNA in different adipose depots in sheep. A. Lemor*1, M. Mielenz1, M. Altmann2, E. von Borell2, and H. Sauerwein1, 1University of Bonn, Germany, 2Martin- Luther-University, Halle-Wittenberg, Germany.
Postnatal ontogeny of skeletal muscle protein synthesis in pigs. T. A. Davis*, A. Suryawan, R. A. Orellana, and M. L. Fiorotto, USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX.
Measuring in vivo intracellular protein degradation rates in animal systems. W. G. Bergen*, Auburn University, Auburn, AL.
The non-lysosomal Ca2+-dependent protein degradation pathway: The calpains, proteasome, and myofibrillar protein turnover. D. E. Goll*, G. Neti, S. W. Mares, and V. F. Thompson, University of Arizona, Tucson.
The mTOR-signaling pathway in regulating metabolism and growth. X. Yang*, C. Yang, A. Farberman, C. F. M. de Lange, J. France, and M. Z. Fan, University of Guelph, Guelph, Ontario, Canada.
Physiology & Endocrinology - Livestock and Poultry Endocrinology Chair: C. Richard Barb, ARS USDA 214 C
G. E. Lanz A*3,1, M. Lucero P3,1, and J. A. Cuaron I2, 1Paiepeme A.C., Queretaro, Mexico, 2CNI-Fisiología Animal, INIFAP, Queretaro, Mexico, 3FESC UNAM, Ajuchitlan, Queretaro, Mexico.
SYMPOSIUM Nonruminant Nutrition Understanding Protein Synthesis and Degradation and Their Pathway Regulations Chair: Ming Z. Fan, University of Guelph Sponsor: Degussa 217 A