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Energy and Protein Influences on Blood Urea Nitrogen of White-Tailed Deer Fawns
R. L. Kirkpatrick, D. E. Buckland, W. A. Abler, P. F. Scanlon, J. B. Whelan and H. E. Burkhart
The Journal of Wildlife Management
Vol. 39, No. 4 (Oct., 1975), pp. 692-698
Stable URL: http://www.jstor.org/stable/3800229
Page Count: 7
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Nineteen female white-tailed deer fawns (Odocoileus virginianus) were used in a 2 × 2 factorial experiment to determine the effect of 2 levels of energy and 2 levels of protein on food consumption, weight gains, and blood urea nitrogen over a 20-week period beginning when the animals were 3.5 months of age. The 2 levels of ration-digestible energy averaged 2,498 and 3,064 kcal/kg. The 2 levels of protein averaged 9.6 and 18.2 percent. Food consumption tended to be greater in animals on low energy diets but decreased in all treatment groups from November through February. Weight gains were significantly greater (P < 0.05) in animals on high protein diets, but no significant difference was found due to energy. Weight gains decreased significantly (P < 0.01) from the 8th through the 20th week of the experiment. Blood urea nitrogen (BUN) was significantly greater (P < 0.01) in fawns receiving high protein diets than in those receiving low protein. Conversely, fawns on high energy intakes had significantly lower (P < 0.01) BUN than those on low energy intakes.
The Journal of Wildlife Management © 1975 Wiley