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Title: A study of the energy metabolism and seasonal cycles of captive red deer
Author: Simpson, Anne Margaret
ISNI:       0000 0001 3412 4771
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 1976
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Two aspects of the biology of red deer: were studie,|, namely, energy metabolism and seasonal cycles. The energy metabolism of young red deer was investigated in three experiments. Firstly, a comparison wss made of the utilisation of a diet by deer and sheep during their first year, by estimates of nitrogen and energy balance. No significant differences in digestibility, metabolizability, or efficiency of utilisation of feed nitrogen and energy were recorded between the species, but there were differences in carcass composition, heat production and maintenance requirement. ; Secondly, measurements were made of the physiological responses of young deer to the stresses of cold arid undernutrition, Hesults suggested that the deer may be less adapted to cold than sheep or cattle, especially when underfed. Finally, gaseous exchange was measured out-of-doors during winter by means of a face mask and the results compared with the previous experiment where cold stress had been imposed in a respiration chamber. A concurrent study was made of the photoperiodic control of seasonal cycles in male red deer. In the first experiment four stags were subjected to a 6-month photoperiod for two years and measurements were made of their growth, appetite and sexual condition. The experiment was then repeated, with certain modifications, and involved sheep as well as deer. Body weight, voluntary food intake, antler growth, testicle size and plasma testosterone concentration showed cyclic fluctuations related to the imposed daylength cycle. The importance of daylength as a stimulus to seasonal activity was confirmed. A subsidiary investigation was made of the effect of tranquillising drugs on the appetite of red deer.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available