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Population Regulation in Male and Female Red Deer

T. H. Clutton-Brock, M. Major and F. E. Guinness
Journal of Animal Ecology
Vol. 54, No. 3 (Oct., 1985), pp. 831-846
DOI: 10.2307/4381
Stable URL: http://www.jstor.org/stable/4381
Page Count: 16
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Population Regulation in Male and Female Red Deer
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Abstract

(1) Using key factor analysis, we analyse and compare the effects of increasing population density on reproduction, survival and emigration in each sex in an increasing population of red deer on the Isle of Rhum between 1971 and 1983. (2) For both sexes, the key factor was winter mortality which fell principally on calves. Calf winter mortality was density dependent. Increasing density had a stronger effect on the survival of males than females, especially during the second year of life. Emigration did not play an important part in regulating density in either sex. (3) The reduced viability of males when food was short may have been caused by their greater nutritional requirements and is probably a consequence of sexual selection.

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