From the DRTC

Heifer in Your Tank and Capstone Projects

  • Milk Production: Video
  • Raw vs. Pasteurized Milk: Video
  • Temple Grandin: Video
  • Cow water beds: Video

Selected Articles

Recent Papers

Salehi, M. G. Colazo, M. Oba, M.K. Dyck, D.J. Ambrose (2015) A prepartum diet supplemented with oilseeds high in oleic or linoleic acid reduced GnRH-induced LH release in dairy cows during second week postpartum. Reproductive Biology and Endocrinology (accepted).

C. Zapata, R. Salehi, D. J. Ambrose, P. K. Chelikani (2015) Effects of Prepartum Fat Supplementation on Plasma Concentrations of Glucagon-like peptide-1, Peptide YY, Adropin, Insulin and Leptin in Periparturient Dairy Cows. Journal of Dairy Science (accepted)

Lu, M.J. Vandehaar, D.M. Spurlock, K.A. Weigel, L.E. Armentano, C. R. Staples, E.E. Connor, Z. Wang, N.M. Bello and R.J. Tempelman. 2015. An alternative approach to modeling genetic merit of feed efficiency in dairy cattle. J. Dairy Sci. (accepted June 02, 2015)

MG Colazo, Ambrose DJ (2015) Effect of initial GnRH and duration of progesterone insert treatment on the fertility of lactating dairy cows. Reproduction in Domestic Animals 50: 497-504.

R Thangavelu, Gobikrushanth M, Colazo MC, Ambrose DJ (2015) Pregnancy per AI and pregnancy loss in lactating dairy cows of a single herd following timed artificial insemination or insemination at detected estrus. Canadian Journal of Animal Science (in press)

MG Colazo, A Behrouzi, DJ Ambrose, RJ Mapletoft (2015) Diameter of the ovulatory follicle at timed-AI as a predictor of pregnancy status in lactating dairy cows subjected to GnRH-based protocols. Theriogenology (in press)

D.J. Ambrose, M. Gobikrushanth,S. Zuidhof, J.P. Kastelic (2015) Low-dose natural prostaglandin F2a (dinoprost) at timed insemination improves conception rate in dairy cattle. Theriogenology 83: 529-534.

Oba, M., J. Mewis, and Z. Zhu. 2015. Effects of ruminal dose of sucrose, lactose, and corn starch on ruminal fermentation and expression of genes in ruminal epithelial cells. J. Dairy Sci. 98:586-594.

Haisan, J., Y. Sun, L. L. Guan, K. A. Beauchemin, A. Iwaasa, S. Duval, D. R. Barreda, and M. Oba. 2014. The effects of feeding 3-nitrooxypropanol on methane emissions and productivity of Holstein cows in mid lactation. J. Dairy Sci.:3110-3119.

Gao, X., and M. Oba. 2014. Relationship of severity of sub-acute ruminal acidosis to rumen fermentation, chewing activities and milk production in lactating dairy cows fed a high grain diet. J. Dairy Sci. 97:3006-3016.

Oba, M., and M. L. Swift. 2014. Effects of feeding Falcon or Tyto whole plant barley silage on milk production and feed efficiency. Can. J. Anim. Sci. 94:151-153.

Sun, Y., and M. Oba. 2014. Effects of feeding a high-fiber byproduct feedstuff as a substitute for barley grain on rumen fermentation and productivity of dairy cows in early lactation. J. Dairy Sci. 97:1594-1602.

M.G. Colazo, P. Ponce-Barajas, D.J. Ambrose (2013) Pregnancy per artificial insemination in lactating dairy cows subjected to 2 different intervals from presynchronization to initiation of Ovsynch protocol. Journal of Dairy Science

C.A. Felton, M.G. Colazo, C.J. Bench, and D.J. Ambrose (2013) Large variations exist in prepartum activity among dairy cows continuously housed in a tie-stall barn. Canadian Journal of Animal Science 93: doi:10.4141/CJAS2013-069.

M.G. Colazo, A. Dourey, R. Rajamahendran, D.J. Ambrose (2013) Progesterone supplementation before timed AI increased ovulation synchrony and pregnancy per AI, and supplementation after timed AI reduced pregnancy losses in lactating dairy cows. Theriogenology 79: 833-841.

Oba, S. Miyashita, R. Nishii, M. Koiwa, H. Koyama, D. J. Ambrose, and O. Dochi (2013) Effects of Serum Collected from Dairy Cows with Low and High Body Condition Score on In Vitro Embryonic Development. Journal of Dairy Science 96:1668-1671.  

Wang, B.N. Ametaj, D.J. Ambrose, M.G. Ganzle (2013) Characterization of the bacterial microbiota of the vagina of dairy cows and isolation of pediocin-producing Pedococcus acidilactici. BMC Microbiology (in press, manuscript # 1057940058688406).

Schlau, N., L. Duineveld, W. Z. Yang, T. A. McAllister, and M. Oba. 2013. Precision processing barley grain did not affect productivity of lactating dairy cows. Can. J. Anim. Sci. 93:261-268.

Manafiazar, G., T. McFadden, L. Goonewardene, E. Okine, and Z. Wang*. 2012. Factors that affecting energy efficiency and indirect response of selection for efficiency on some related traits. Chapter 6 in Milk Production / book. InTech publisher. DOI: 10.5772/50776. Edited by N. Chaiyabutr