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Tissue mobilization rates in male fallow deer (Dama danta) as determined by computed tomography: the effects of natural and enforced food restriction

  • N. B. Jopson (a1), J. M. Thompson (a1) and P. F. Fennessy (a2)


The breeding season in temperate species of deer is characterized by the rut, a period of intense sexual activity when the male eats very little and competes for access to females. Males have been reported as losing proportionately up to 0·30 of live weight over a 6- to 8- week period. The majority of the live-weight loss is accounted for in loss of depot fat, with smaller losses in muscle reserves. The effects of body composition, hormone status and season on these changes in fat and muscle reserves were examined in mature fallow bucks (Dama dama).

The experiment was conducted in two stages, the ‘rut’ (February to May), and ‘spring’ (June to November). For the ‘rut’ period, bucks were randomly allocated to either ad libitum feeding, entire (HiEnt), matched group feeding, castrated (CAST), or entire bucks restricted to 7·6 kg dry matter per week (LoEnt) treatment groups (no. =4, 4 and 6, respectively). Three bucks from each of the HiEnt and LoEnt groups were selected for the ‘spring’ period. Bucks were given food ad libitum until mid October, whereupon they were restricted to 2·5 kg dry matter per week for 4 weeks (SPRING). Group food intake and individual live weights were measured weekly throughout both, periods. Body composition was measured by computed tomography on five and three occasions during the ‘rut’ and ‘spring’ stages, respectively.

Comparisons of the relative losses of total fat and muscle relative to empty body weight (EBW) using the allometric model (y = aXb) revealed significant treatment differences. HiEnt bucks had a high relative rate of fat and a low rate of muscle mobilization (b = 5·23 and 0·38, respectively). Only the CAST group had lower (P < 0·1) b coefficient for fat than the HiEnt group at 2·79. The LoEnt group was the only group in which the b coefficient for muscle (at 1·07) was not significantly lower than 1·0. Visceral organ weight was lost at the same rate as EBW across all treatments. There was no net loss or gain of bone for any treatment group as the b coefficients were not significantly different from zero. Fat depots were analysed relative to the total fat depot using the allometric model. The HiEnt group displayed a pattern of fat mobilization whereby the external depots were mobilized at the greatest relative rate and the internal fat depots at the lowest rate (b coefficients were 1·86, 1·23 and 0·68 for the subcutaneous, intermuscular and internal fat depots, respectively). CAST and SPRING groups were not significantly different from HiEnt bucks in the relative mobilization of fat depots. All fat depots in the LoEnt group were mobilized at the same relative rate as total fat, as the b coefficients were not significantly different from 1·0.



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Asher, G. W., Day, A. M. and Barrell, G. K. 1987. Annual cycle of liveweight and reproductive changes of farmed male fallow deer (Dama dama) and the effect of daily oral administration of melatonin in summer on the attainment of seasonal fertility. Journal of Reproduction and Fertility 79: 353362.
Asher, G. W., Peterson, A. J. and Bass, J. J. 1989. Seasonal pattern of LH and testosterone secretion in adult male fallow deer, Dama dama, Journal of Reproduction and Fertility 85: 657665.
Aziz, N. N., Murray, D. M. and Ball, R. O. 1992. The effects of live weight gain and live weight loss on body composition of Merino wethers: dissected muscle, fat, and bone. Journal of Animal Science 70:18191828.
Bandy, P. J., Cowan, I. M. and Wood, A. J. 1970. Comparative growth in four races of black-tailed deer (Odocoileus hemionus). 1. Growth in body weight. Canadian Journal of Zoology 48:14011410.
Bobek, B., Perzanowski, K. and Weiner, J. 1990. Energy expenditure for reproduction in male red deer. Journal of Mammalogy 71:230232.
Clutton-Brock, T. H., Guinness, F. E. and Albon, S. D. 1982. Red deer: behaviour and ecology of two sexes. University of Chicago Press, Chicago.
Drew, K. R. 1985. Meat production from farmed deer. In Biology of deer production (ed. P. F. Fennessy and K. R. Drew), The Royal Society of New Zealand, bulletin 22, pp. 285290.
Fennessy, P. F. 1981. Nutrition of red deer. In Proceedings of a deer seminar for veterinarians, Deer Advisory Panel, NZVA, pp. 815.
Fennessy, P. F. and Milligan, K. E. 1987. Grazing management of red deer. In Feeding livestock on pasture (ed. Nicol, A. M.), occasional publication no. 10, New Zealand Society of Animal Production, pp. 111118.
Fennessy, P. F., Thompson, J. M. and Suttie, J. M. 1991. Season and growth strategy in red deer: evolutionary implications and nutritional management. In Wildlife production: conservation and sustainable development (ed. Renecker, L. A. and Hudson, R. J.), pp. 495501. University of Alaska, Fairbanks.
Fullerton, G. D. 1980. Fundamentals of CT tissue characterisation. In Medical physics of CT and ultrasound: tissue imaging and characterisation (ed. Fullerton, G. D. and Zagzebski, J. A.), medical physics monograph, no. 6, American Institute of Physics, pp. 125162.
Gibson, R. M. and Guinness, F. E. 1980. Behavioural factors affecting male reproductive success in red deer (Cervus elaphus). Animal Behaviour 28:11631174.
Gregson, J. E. and Purchas, R. W. 1985. The carcass composition of male fallow deer. In Biology of deer production (ed. P. F. Fennessy and K. R. Drew), The Royal Society of New Zealand, bulletin 22, pp. 295298.
Gundersen, H. J. G., Bendtsen, T. F., Korbo, L., Marcussen, N., Moller, A., Nielsen, K., Nyengaard, J. R., Pakkenberg, B., Serensen, F. B., Vesterby, A. and West, M. J. 1988. Some new, simple and efficient stereological methods and their use in pathological research and diagnosis. Ada Pathologica, Microbiologica et Immulogica Scandinavica 96:379394.
Huxley, J. 1931. Problems of relative growth, first edition. Methuen, London`1.
Kay, R. N. B. 1979. Seasonal changes of appetite in deer and sheep. ARC Research Review 5: 1315.
Kelly, R. W., Fennessy, P. F., Moore, G. H., Drew, K. R. and Bray, A. R. 1987. Management, nutrition, and reproductive performance of farmed deer in New Zealand. In Biology and management of the Cervidae (ed. Wemmer, C. M.), pp. 450460. Smithsonian Institute Press, Washington, DC.
Mitchell, B., McCowan, D. and Nicholson, I. A. 1976. Annual cycles of body weight and condition in Scottish red deer (Cervus elaphus). Journal of Zoology, London 180:107127.
Mrosovsky, N. 1976. Lipid programmes and life strategies in hibernators. American Zoology 16:685697.
Mrosovsky, N. and Powley, T. L. 1977. Set points for body weight and fat. Behavioural Biology 20:205223.
Mrosovsky, N. and Sherry, D. F. 1980. Animal anorexias. Science 207: 837842.
Newman, R., Weston, R., Foldes, A., Jarratt, P. and Wynn, P. 1992. Administration of exogenous testosterone reduces feed intake in male fallow deer. Proceedings of the Australian Society of Animal Production 19:420.
Renouf, D. and Noseworthy, E. 1991. Changes in food intake, mass, and fat accumulation in association with variations in thyroid hormone levels of harbour seals (Phoca vitulina). Canadian Journal of Zoology 69:24702479.
Schanbacher, B. D., Crouse, J. D. and Ferrell, C. L. 1980. Testosterone influences on growth, performance, carcass characteristics and composition of young market lambs. Journal of Animal Science 51: 685691.
Statistical Analysis Systems Institute. 1992. SAS technical report P-229, SAS/STAT software: changes and enhancements, release 6.07. SAS Institute Inc, Cary, NC.
Suttie, J. M., Fennessy, P. F., Corson, I. D., Veenvliet, B. A., Littlejohn, R. P. and Lapwood, K. R. 1992. Seasonal pattern of luteinizing hormone and testosterone pulsatile secretion in young adult red deer stags (Cervus elaphus) and its association with the antler cycle. Journal of Reproduction and Fertility 95:925933.
Tan, G. Y. and Fennessy, P. F. 1981. The effect of castration on some muscles of red deer (Cervus elaphus L.) New Zealand Journal of Agricultural Research 24:13.
Thompson, J. M. and Kinghorn, B. P. 1992. CATMAN — A program to measure CAT-scans for prediction of body components in live animals. Proceedings of the Australian Association of Animal Breeding and Genetics 10:560564.
Tyler, N. J. C. 1987. Body composition and energy balance of pregnant and non-pregnant Svalbard reindeer during winter. Symposium of the Zoological Society of London, pp. 203229.
Unruh, J. A. 1986. Effects of endogenous and exogenous growth-promoting compounds on carcass composition, meat quality and meat nutritional value. Journal of Animal Science 62:14411448.
Wallace, V. and Davies, A. S. 1985. Pre- and post-rut body composition of red deer stags. In Biology of deer production (ed. P. F. Fennessy and K. R. Drew), The Royal Society of New Zealand, bulletin 22, pp. 291293.
Wolkers, H., Wensing, T., Schonewille, J. T. and Klooster, A. T. van 't. 1994. Undernutrition in relation to changed tissue composition in red deer (Cervus elaphus). Canadian Journal of Zoology 72:18371840.
Young, R. A. 1976. Fat, energy and mammalian survival. American Zoology 16: 699710.


Tissue mobilization rates in male fallow deer (Dama danta) as determined by computed tomography: the effects of natural and enforced food restriction

  • N. B. Jopson (a1), J. M. Thompson (a1) and P. F. Fennessy (a2)


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