Tanya Gressley
Tanya Gressley
Associate Dean, Graduate Programs
Office location:
531 S. College Avenue
032 Townsend Hall
Newark, DE 19716
Education
- Ph.D. Dairy Science, University of Wisconsin, 2005
- M.S. Animal Science, University of Maryland, 1999
- B.S. Animal Science, University of Maryland, 1997
Primary courses
- ANFS 112 – Animal Handling Lab
- ANFS 404 – Dairy Production
- ANFS 417 – Beef Cattle and Sheep Production
- ANFS 442/642 – Lactational Physiology
- ANFS 454 – Advanced Ruminant Nutrition
Research
Our lab researches dairy cattle nutrition with a focus on amino acid nutrition and silage microbiology. Current projects include assessment of the bioavailability of and animal performance response to rumen-protected amino acids and effects of microbial inoculants on silage fermentation.
Journal Articles
Cronin, S. K., M. Smith, C. M. K. Bradley, V. L. Daley, F. Gadeyne, M. Bustos, and T. F. Gressley. 2025. Evaluation of hindgut buffers under high-starch diet conditions in lactating Holstein cows. J. Dairy Sci. 108:4946-4962.
Silva, I. N., T.S. Oliveira, E. S. Aniceto, J. R. Meirelles, Jr., E. J. L. Mozelli Filho, A. M. Fernandes, G. A Souza Filho, T. Gressley. 2024. Evaluation of sweet orange essential oil on fermentation and aerobic stability of corn silage. Scientia Agricola 81, e20230229.
Meirelles, Jr., J. R., T.S. Oliveira, I. N. Silva, E. S. Aniceto, E. J. L. Mozelli Filho, A. M. Fernandes, G. A Souza Filho, T. Gressley. 2024. Evaluation of treated shrimp shells from artisanal fishing on preservation quality of corn silage. Anim. Feed Sci. Tech. 310: 115926.
Cronin, S. K., A. M. Barnard, S. J. Dietz, M. Lawrence, A. E. Kramer, and T. F. Gressley. 2023. Effect of short-term abomasal corn starch infusions on postruminal fermentation and blood measures. J. Dairy Sci. 106:8658-8669.
Smith, M., S. Cronin, J. Mateos, D. Martinez del Olmo, F. Valdez, and T. F. Gressley. 2022. Evaluation of animal performance response to the supplementation of 2 rumen protected methionine supplements in post-peak Holstein cows. App. Anim. Sci. 38:343-349.
da Silva, E. B., X. Liu, C. Mellinger, T. F. Gressley, J. Stypinski, N. Moyer, and L. Kung, Jr. 2022. The effect of dry matter content on the microbial community and on the effectiveness of a microbial inoculant to improve the aerobic stability of corn silage. J. Dairy Sci. 105:5024-5043.
Smith, M., S. Cronin, J. Mateos, D. Martinez del Olmo, F. Valdez, and T. F. Gressley. 2022. Comparison of plasma methionine response to 3 rumen protected methionine products in lactating Holstein cows. App. Anim. Sci. 38:110-117.
Lawrence, M., S. Polukis, A. M. Barnard, M. Miller, L. Kung, Jr., and T. F. Gressley. 2021. Evaluating the impact of Lactobacillus animalis and Propionibacterium freudenreichii on performance and rumen and fecal measures in lactating dairy cows. J. Dairy Sci. 104:4119-4133.
Research Abstracts
Cronin, S. K., K. Hobert, A. S. Biddle, C. M. K. Bradley, and T. F. Gressley. 2024. In vitro effects of starch with or without buffers on dairy cattle fecal microbiome. J. Dairy Sci. 107 (Suppl. 1): 385.
Cronin, S. K., X. Liu, N. Romero, L. Kung, and T. F. Gressley. 2024. Inoculation with a mixture of Lentilactobacillus hilgardii, Lentilactobacillus buchneri, and Pediococcus pentosaceus improves the starch digestibility of corn silage. J. Dairy Sci. 107 (Suppl. 1): 311.
Cronin, S., F. Perry, C. M. K. Bradley, V. Daley, F. Gadeyne, M. Bustos, R. J. Arsenault, and T. F. Gressley. 2023. Effect of abomasal starch and hindgut buffers on lymphocyte kinome profile. J. Dairy Sci. 106 (Suppl. 1): 291.
Smith, M., S. Cronin, J. Mateos, D. Martinez del Olmo, F. Valdez, T. F. Gressley. 2022. Evaluating plasma methionine response to feeding three rumen-protected methionine products. Presented at 31st World Buiatrics Congress, Madrid, Spain September 2022.
Gressley, T. F., M. Lawrence, A. Barnard, J. Mateos, and D. Martinez del Olmo. 2022. Plasma methionine response for the evaluation of two rumen-protected methionine prototypes. Presented at 31st World Buiatrics Congress, Madrid, Spain September 2022.
Cronin, S., M. Smith, C. M. K. Bradley, V. Daley, F. Gadeyne, M. Bustos, and T. F. Gressley. 2022. Evaluating hindgut buffers under high-starch diet conditions in lactating Holstein cows. J. Dairy Sci. 105 (Suppl. 1): 329.