University of Florida

Geoffrey Dahl, Ph.D.

Dr. Dahl conducts applied and basic research with direct impact on animal production and health. Specifically, his program focuses on understanding the physiological impact of management interventions at various stages of the lactation cycle, in an attempt to harness that knowledge to optimize cow health and performance.  The fundamental aspects of Geoff’s research has led to application in other agriculturally important species including sheep, goats and pigs.

Representative Publications:
Auchtung, T.L., P.E. Kendall, J. Salak-Johnson, T.B. McFadden and G.E. Dahl.  2003.  Photoperiod and bromocriptine treatment effects on expression of prolactin receptor mRNA in bovine liver, mammary gland and peripheral blood lymphocytes.  J. Endocrinol.  179:347-356.

Auchtung, T.L. and G.E. Dahl.  2004. Prolactin mediates photoperiodic immune enhancement: Effects of administration of exogenous prolactin on circulating concentrations, receptor expression, and immune function in steers.  Biol. Reprod. 71:1913-1918.

Wall, E.H., T.L. Auchtung-Montgomery, G.E. Dahl and T.B. McFadden.  2005.  Short communication: short day photoperiod during the dry period decreases expression of suppressors of cytokine signaling in the mammary gland of dairy cows.   J. Dairy Sci. 88:3145-3148.

Niekamp, S.R., M.A. Sutherland, G.E. Dahl, and J.L. Salak-Johnson.  2007. Immune responses of piglets to weaning stress:  Impacts of photoperiod. J. Anim. Sci. 85:93-100.

Dahl, G.E.  2007. Effects of short day photoperiod on prolactin signaling of dry cows: A common mechanism among tissues and environments?  J. Anim. Sci. 85:In Press.

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Geoffrey Dahl, Ph.D.
Professor and Chair
Department of Animal Sciences
Ph.D., Michigan State University
Postdoc., University of Michigan

Department of Animal Sciences: Faculty Page