Assistant Professor
- Ph.D. Dairy Science, University of Wisconsin, 2005
- M.S. Animal Science, University of Maryland, 1999
- B.S. Animal Science, University of Maryland, 1997
- ANFS 404 - Dairy Production
- ANFS 865 - Seminar
- To examine aspects of dairy cattle nutrition as they relate to cow health. Current projects include: measuring effect of feed supplements on white blood cell function, evaluating feed supplement effects on post-ruminal fermentation, and evaluating in vitro measures of cow health.
Short-day photoperiod increases milk yield in cows with a reduced dry period length. 2008. Velasco, J. M., E. D. Reid, K. K. Fried, T. F. Gressley, R. L. Wallace, and G. E. Dahl. J. Dairy Sci. 91: 3467-3473
Mikolayunas, C. M., D. L. Thomas, G. E. Dahl, T. F. Gressley, and Y.M. Berger. 2008. Effect of prepartum photoperiod on milk production and prolactin concentration of dairy ewes. J. Dairy Sci. 91:85-90.
Rastani, R. R., N. Silva Del Rio, T. F. Gressley, G. E. Dahl, and R. R. Grummer. 2007. Effects of increasing milking frequency during the last 28 days of gestation on milk production, dry matter intake, and energy balance in dairy cows. J. Dairy Sci. 90: 1729-1739.
Gressley, T. F., and L. E. Armentano. 2007. Effects of low rumen degradable protein or abomasal fructan infusion on diet digestibility and urinary nitrogen excretion in lactating dairy cows. J. Dairy Sci. 90:1340-1353.
Gressley, T. F., S. M. Reynal, J. J. Olmos Colmenero, G. A. Broderick, and L. E. Armentano. 2006. Development of a tool to insert abomasal infusion lines into dairy cows. J. Dairy Sci. 89:3965-3967.
Gressley, T. F., and L. E. Armentano. 2005. Effect of abomasal pectin infusion on digestion and nitrogen balance in lactating dairy cows. J. Dairy Sci. 88:4028-4044.
Pozzo, S. S., M. K. Rankin, and T. F. Gressley. 2008. Dexamethasone administration increased bovine lymphocyte clock gene expression in vitro and in vivo. J. Dairy Sci. 91(E-Suppl. 1):3.
Nebzydoski, S. J., L. M. Nemec, and T. F. Gressley. 2008. The effect of the synthetic glucocorticoid dexamethasone on clock gene expression in bovine neutrophils. 91(E-Suppl. 1):161.
Gressley, T. F., K. K. Fried, J. M. Velasco, E. D. Reid, T. C. Hausman, K. M. Moyes, J. L. Salak-Johnson, and G. E. Dahl. 2007. Effects of reduced freestall access during the dry period upon cellular immune function of dairy cows. J. Dairy Sci. Abstract #21444.
Gressley, T. F., E. E. Connor, and G. E. Dahl. 2006. Liver expression of the clock gene TIMELESS is reduced by long day photoperiod in dairy steers. J. Dairy Sci. 89(Suppl. 1):289.
Kulick, A. E., T. F. Gressley, J. A. A. Pires, and R. R. Grummer. 2006. Effects of abomasal lipid infusion on liver triglyceride accumulation during fatty liver induction. J. Dairy Sci. 89(Suppl. 1):266.
Velasco, J. M., E. D. Reid, K. E. Karvetski, T. F. Gressley, R.L. Wallace, and G.E. Dahl. 2006. Short day photoperiod increases milk yield in cows with a reduced dry period length. J. Dairy Sci. 89(Suppl. 1):147.
Contact Information:
Tanya F. Gressley, Ph.D.
Assistant Professor
Ruminant Biologist
044 Townsend Hall
Department of Animal and Food Sciences
University of Delaware
Newark, DE 19716
Telephone: (302) 831-1940
Lab: (302) 831-6214
Fax: (302) 831-2822
Email: gressley@udel.edu
