Education
- Postdoctorate,
Cornell University - Nutritional Physiology
- Ph.D., University of Illinois - Dairy Nutrition
- M.S., University of Maine - Animal Nutrition
- B.S., University of Maine - Biochemistry
Research
Interests
Regulation of
nutrient use by food producing animals with a focus on lactation.
Studies are designed to determine physiological,
metabolic, and genetic factors that regulate and affect performance
and efficiency of lactation. Effects of selective breeding, metabolic
modifiers, and dietary modifications on lactational performance,
body composition, endocrine profiles, and gene expression are determined.
Holstein cows from a breeding project designed to produce superior
(high producing, efficient) and inferior (low producing, less efficient)
cows, which currently differ in milk yield per lactation by more
than 4,000 kg, and contemporary cows are used in these studies.
Current efforts with these cows and their calves are focused on
the somatotropic axis (GH, IGF-I, and IGFBPs). We are also evaluating
methods to successfully induce cows to lactate, that is to produce
milk without calving.
Teaching
Responsibilities
- ANSC 1011: Domestic Animals & Society (guest lecturer)
- ANSC 3511: Animal Growth & Development (guest lecturer)
- ANSC 8134 - Ethical Conduct of Animal Research (co-instructor)
- ANSC 8311: Advanced Animal Nutrition I
- ANSC 8312: Advanced Animal Nutrition II
- ANSC 8320: Concepts and Developments in Nutritional Physiology
Outreach
Programs
Developed
program addressing safety, use, and economics of bovine somatotropin.
Participate in efforts to address issues in animal welfare, biotechnology,
and ethics.
Awards
National
Milk Producers (R. M. Hoyt Memorial) Award for Outstanding Graduate
Student in Dairy Science, 1985
Affiliated
Centers/Organizations/Appointments
Minnesota
Foundation for Responsible Animal Care
Professional
Activities
- Board
of Directors, Minnesota Foundation for Responsible Animal Care
- Member,
American Dairy Science Association
- Member,
American Society of Animal Science
- Member, Cargill Animal Nutrition Young Scientist Award Committee (2006-present)
- Member,
International Insulin-like Growth Factor Research Society
Publications (2004-2008)
- Refereed Articles -
Annen, E.L., C.M. Stiening, B.A. Crooker, A.C. Fitzgerald, and R.J. Collier. 2008. Effect of continuous milking and prostaglandin E2 on milk production and mammary epithelial cell turnover, ultrastructure, and gene expression. J. Anim. Sci. 86:1132-1144.
Carriquiry, M., W.J. Weber, L.H. Baumgard, and B.A. Crooker. 2008. In vitro biohydrogenation of four sources of protected dietary fats. Anim. Feed Sci. Technol. 141:339-355.
Weber, W.J., C.R. Wallace, L.B. Hansen, H. Chester-Jones, and B.A. Crooker. 2007. Effects of selection for milk yield on somatotropin, insulin-like growth factor-I and placental lactogen in Holstein cows. J. Dairy Sci. 90:3314-3325.
Radcliff, R.P., B.L. McCormack, D.H. Keisler, B.A. Crooker, and M.C. Lucy. 2006. Partial feed restriction decreases growth hormone receptor 1A mRNA expression in postpartum dairy cows. J Dairy Sci. 89(2):611-619.
Jiang, H., M.C. Lucy, B.A. Crooker, and W.E. Beal. 2005. Expression of growth hormone receptor 1A mRNA is decreased in dairy cows but not in beef cows at parturition. J. Dairy Sci. 88:1370-1377.
Kay, J.K., W.J. Weber, C.E. Moore, D. Bauman, L. Hansen, H. Chester-Jones, B.A. Crooker, and L.H. Baumgard. 2005. Effects of week of lactation and genetic selection for milk yield on milk fatty acid composition in Holstein dairy cows. J. Dairy Sci. 88:3886-3893.
Weber, W.J., L.H. Baumgard, G.W. Kazmer, S.A. Zinn, L.B. Hansen, H. Chester-Jones, and B.A. Crooker. 2005. Effects of selection for milk yield on growth hormone response to dose of growth hormone releasing factor in Holstein calves. J. Dairy Sci. 88:1723-1731.
- Invited Papers, Conference Proceedings, Research Reports -
Crooker, B.A., M. Carriquiry, and W.J. Weber. 2006. Reproductive success in dairy cows: the linkage of milk yield, nutrition, and reproduction. 8th Intermountain Nutrition Conf. Salt Lake City, UT. Jan. 24-25. pp. 213-224.
Carriquiry, M. and B.A. Crooker. 2005. Reproductive success in dairy cows: the linkage of milk yield, nutrition, and reproduction. 66th Minnesota Nutrition Conference. St. Paul, MN. September 20-21. pp. 255-269.
Crooker, B.A. 2004. Induced lactation. Department of Animal Sciences, University of Arizona, Tucson, AZ. Feb. 9.
Crooker, B.A. 2004. Induced lactation - If approved, would it be economical? University of Illinois, Urbana. June 5.
Crooker, B.A., D.T. Galligan, W.J. Weber, R.J. Collier, M. Chahine, T.H. Klusmeyer, M.F. McGrath, and J.L. Vicini. 2004. Induced lactation - If approved, would it be economical? Proc., 19th Annual Southwest Nutrition and Management Conference, Tempe, Arizona. Feb. 24-25. pp. 152-161.
McGuire, M.A., M. Theurer, J.L. Vicini, and B.A. Crooker. 2004. Controlling energy balance in early lactation. 22nd Annual Western Canadian Dairy Symposium: Advances in Dairy Technology, Red Deer, AB. March 9-12. 16:241-252.
Crooker, B.A., D.T. Galligan, W.J. Weber, R.J. Collier, M. Chahine, T.H. Klusmeyer, M.F. McGrath, and J.L. Vicini.
2004. Induced lactation - If approved, would it be economical? Southwest
Nutrition and Management Conference Proceedings. University of Arizona.
pp. 152-161.
McGuire, M.A.,
M. Theurer, J.L. Vicini, and B.A. Crooker. 2004. Controlling
energy balance in early lactation. Western Canadian Dairy Symposium.
Advances in Dairy Technology. 16:241-252.
- Abstracts -
Carriquiry, M., C.R. Dahlen, W.J. Weber, G.C. Lamb, and B.A. Crooker. 2006. Bovine somatotropin and dietary fat enriched with omega-3 fatty acids in dairy cows: III. Postpartum ovarian activity. J. Dairy Sci. 89(Suppl. 1):346.
Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, and B.A. Crooker. 2006. Bovine
somatotropin and dietary fat enriched with omega-3 fatty acids in dairy cows: I. Lactation performance. J. Dairy Sci. 89(Suppl. 1):63.
Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, S.R. Sanders, L.H. Baumgard, and B.A. Crooker. 2006. Bovine somatotropin and dietary fat enriched with omega-3 fatty acids in dairy cows: II. Milk fatty acid composition. J. Dairy Sci. 89(Suppl. 1):63.
Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, and B.A. Crooker. 2005. Effects of bST and dietary fat in early lactation on lactational performance of Holstein cows. J. Dairy Sci. 88(Suppl. 1):178.
Pollard, B.C., M.D. Estheimer, M.E. Dwyer, P.C. Gentry, W.J. Weber, E. Lemke, L.H. Baumgard, D.A. Henderson, B.A. Crooker, and R.J. Collier. 2005. The influence of parity, acclimatization to season, and recombinant bovine somatotropin (rbST) on diurnal patterns of prolactin and growth hormone in Holsteins exposed to heat stress. J. Dairy Sci. 88(Suppl. 1):121.
Wu, S.H., W.J. Weber, Y. Da, H. Chester-Jones, L.B. Hansen, Y. Boisclair, and B.A. Crooker. 2005. Leptin gene polymorphisms and selection for milk yield in Holstein cows. J. Dairy Sci. 88(Suppl. 1):170.
Annen, E.L., C.M. Stiening, M.E. Dwyer, B.A. Crooker, A.C. Fitzgerald, and R.J. Collier. 2004. Effects of continuous milking and prostaglandin E 2 on milk yield and composition. J. Dairy Sci. 87(Suppl. 1):132. Abstract 223.
Carriquiry, M., S.H. Wu, W.J. Weber, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2004. Effect of selection for milk yield on hepatic prolactin receptor (PRLR) mRNA in Holstein cows. J. Dairy Sci. 87(Suppl. 1):94. Abstract 67.
Crooker, B.A., W.J. Weber, C. Cheatham, L.H. Baumgard, and G.C. Duff. 2004. Effect of implant program on somatotropin (ST) response to growth hormone releasing factor (GRF) in finishing Holstein steers. J. Anim. Sci. 82(Suppl. 1):364.
Crooker, B.A., W.J. Weber, R.J. Collier, S.C. Denham, M.F. McGrath, and J.L. Vicini. 2004. Effect of intramammary infusion of bovine somatotropin (bST) on milk yield by cows induced to lactate. Biotech. Agron., Society and Environ. 8:28.
Jiang, H., M.C. Lucy, B.A. Crooker, and W.E. Beal. 2004. Liver expression of growth hormone receptor 1A mRNA is decreased in dairy cows but not in beef cows at parturition. J. Dairy Sci. 87(Suppl. 1):198. Abstract T143.
Kay, J.K., W.J. Weber, H. Chester-Jones, L.B. Hansen, D.E. Bauman, B.A. Crooker, and L.H. Baumgard. 2004. Effects of genetic selection for milk yield and stage of lactation on milk fatty acid profiles. FASEB J. 18(4-5).
Radcliff, R.P., B.L. McCormack, B.A. Crooker, and M.C. Lucy. 2004. Plasma hormones and expression of growth hormone receptor (GHR) 1A and IGF-I mRNA in hepatic tissue of feed-restricted peri-parturient dairy cows. J. Dairy Sci. 87(Suppl. 1):195). Abstract T127.
Weber, W.J., L.H. Baumgard, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2004. Effect of selection for milk yield on prolactin profiles in multiparous Holstein cows during the periparturient period. Biotech. Agron., Society and Environ. 8:31.
Wu, S.H., W.J. Weber, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2004. Effects of intake, selection for milk yield, and bST administration on hepatic expression of insulin receptors and components of the somatotropic axis in growing Holstein heifers. J. Dairy Sci. 87(Suppl.1):364. Abstract W205.
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