The relationship between negative energy balance and mastitis in dairy cattle during early lactation. K. M. Moyes*1, T. Larsen2, N. C. Friggens2, J. K. Drackley1, and K. L. Ingvartsen2, 1University of Illinois, Urbana, 2University of Aarhus, Tjele, Denmark.
The use of the Rumensin Premix in dairy cows: factors influencing its effects on milk production and milk composition. J. Dubuc*1, D. DuTremblay1, M. Brodeur1, R. Bagg2, P. Dick2, J. Baril2, and L. DesCoteaux1, 1Universite de Montreal, Saint- Hyacinthe, Quebec, Canada, 2Elanco Animal Health, Guelph, Ontario, Canada.
The expression of genes regulating lipolysis in the adipose tissue of pregnant and lactating dairy cattle. J. M. Sumner* and J. P. McNamara, Washington State University, Pullman.
Feeding a whey protein gel to prevent rumen hydrogenation of unsaturated fatty acids and increase the n3 and n6 fatty acid content of goat milk. J. A. Weinstein*, E. J. DePeters, M. Rosenberg, S. J. Taylor, and A. Aljadeff, University of California, Davis.
Effect of time of AI and supplemental estradiol on pregnancy rates of lactating dairy cows. J. Hillegass*, J. E. P. Santos, F. S. Lima, M. F. Sheley, and M. F. S. Filho, University of California, Tulare.
Interactions of unsaturated fat or coconut oil with Rumensin on milk fat production might be mediated through inhibition of specific protozoal genera. C. Reveneau*, S. K. R. Karnati, C. V. D. M. Ribeiro, E. R. Oelker, B. Mathew, D. R. Bae, C. M. Drow, and J. L. Firkins, The Ohio State University, Columbus.
Effect of mannan-oligosaccharides on the mucosal immune system of dairy calves. V. C. Quezada*, B. B. Babatunde, and T. L. Frankel, La Trobe University, Bundoora, Victoria, Australia.
Effect of anion supplementation to low potassium prepartum diets on macromineral status and performance of periparturient dairy cows. J. M. Ramos-Nieves*1, B. J. Thering1, P. W. Jardon2, and T. R. Overton1, 1Cornell University, Ithaca, NY, 2West Central®, Ralston, IA.
Effects of an injectable chelated mineral supplement on dairy calf performance. J. R. Crenwelge*1, T. D. Nennich2, B. D. Lambert1,2, N. M. Cherry2, and E. R. Jordan3, 1Tarleton State University, Stephenville, TX, 2Texas A&M University, Stephenville, 3Texas A&M University, Dallas.
Calcium and phosphorus balance and bone mobilization through lactation with varying dietary calcium concentrations. M. S. Taylor*1, K. F. Knowlton1, M. L. McGilliard1, W. S. Swecker, Jr.1, J. D. Ferguson2, and Z. Wu2, 1Virginia Polytechnic Institute and State University, Blacksburg, 2University of Pennsylvania, Kennett Square.
Ovulation and CL development in mature cows given pLH or GnRH. T. O. Ree*1,2, M. G. Colazo3, D. J. Ambrose3,2, A. G. A. Lamont2,3, J. P. Kastelic4, M. K. Dyck2, R. J. Mapletoft5, and B. N. Ametaj2, 1Lakeland College, Vermilion, AB, Canada, University of Alberta, Edmonton, AB, Canada, 3Alberta Agriculture and Food, Edmonton, AB, Canada, 4Agriculture and Agri-food Canada, Lethbridge, AB, Canada, 5University of Saskatchewan, Saskatoon, SK, Canada.
Early postpartum biochemical and management characteristics related to dairy cow removal. C. S. McConnel*, S. M. Hiibel, J. A. Kidd, A. E. Hill, and F. B. Garry, Colorado State University, Fort Collins.
Effect of dietary energy and metabolizable protein in lactating dairy cows. A. G. Rius*, M.L. McGilliard, and M.D. Hanigan, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.
Photoperiod alters metabolic gene expression in bovine liver potentially through suppressors of cytokine signaling. E. E. Connor*1, E. D. Thomas2, and G. E. Dahl3, 1Bovine Functional Genomics Laboratory, USDA-ARS, Beltsville, MD, 2Department of Animal and Avian Sciences, University of Maryland, College Park, 3Department of Animal Sciences, University of Florida, Gainesville.
Effects of intramammary infusions of serotonin (5-HT) and methysergide (METH), a 5-HT antagonist, on milk production and composition in lactating dairy cows. L. L. Hernandez*1, J. B. Wheelock1, G. Shwartz1, L. H. Baumgard1, A. M. Parkhurst2, and R. J. Collier1, 1University of Arizona, Tucson, 2University of Nebraska, Lincoln.
Chitotriosidase activity in blood and colostrum at peripartum period in goats. N. Castro1, J. Capote2, A. Morales1, C. Rodriguez1, and A. Arguello*1, 1Las Palmas de Gran Canaria University, Animal Science Unit, Arucas, Las Palmas, Spain, Canary Agronomic Science Institute, La Laguna, Tenerife, Spain.
Pre-pubertal nutrition affects mammary development and first lactation performance depending on growth potential in dairy sheep. A. Zidi1, G. Caja*1, M. Ayadi2, V. Castillo1, C. Flores1, and X. Such1, 1Universitat Autònoma de Barcelona, Bellaterra, Spain, 2Institut Superieur de Biologie Appliquée de Medenine, Tunisia.
Graduate Student Paper Competition: National ADSA Production Division Chair: Mary Beth Hall, U.S. Dairy Forage Research Center, USDA-ARS 204 B