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The influence of loss of plumage on temperature regulation in laying hens

Published online by Cambridge University Press:  27 March 2009

S. A. Richards
S. A. Richards
Affiliation:
Wye College, University of London, Ashford, Kent TN25 5AH
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Summary

The acute thermoregulatory responses of normally feathered (control) and poorly feathered laying hens were studied in the ambient temperature range from 0 to 38 °C.

Core body temperature in the poorly feathered birds began to fall at between 15 and 20 °C but this difference from the controls was significant only at 0 and 5 °C, when there was severe hypothermia. The temperature on the skin of the back was significantly lower at 20 °C and below, but the comb temperatures did not differ.

The rate of oxygen consumption in the poorly feathered hens was significantly higher than that of the controls at 30 CC and below; at the acclimation temperature (20–25 °C) the difference was about 62%. The rate of increase of heat production with falling ambient temperature was 2–6 W/ma/°C in the poorly feathered group and 1–0 W/ma/°C in the controls.

Absolute rates of evaporative heat loss did not differ between the two groups.

The ratio of the coefficients of dry heat transfer in the poorly feathered and control birds at 0–30 °C was 2–1:1.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 89 , Issue 2 , October 1977 , pp. 393 - 398
Copyright
Copyright © Cambridge University Press 1977

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References

Aschoff, J. & Pohl, H. (1970). Rhythmic variations in energy metabolism. Federation Proceedings 29, 1541–52.Google ScholarPubMed
Benedict, F. G., Landauer, W. & Fox, E. L. (1932). The physiology of normal and frizzle fowl, with special reference to basal metabolism. Storrs Agricultural Experimental Station Bulletin 177, 13–101.Google Scholar
Depocas, F. & Hart, J. S. (1957). Use of the Pauling oxygen analyser for measurement of oxygen consumption of animals in open-circuit system and in a short-lag closed-circuit apparatus. Journal of Applied Physiology 10, 388–92.CrossRefGoogle Scholar
Emmans, G. C. & Dun, P. (1973). Temperature and ventilation rates for laying fowls: Supplementary report on feathering and combs. Oleadthorpe Experimental Husbandry Farm Report, FAC 163.Google Scholar
Herreid, C. F. & Kessel, B. (1967). Thermal conductance in birds and mammals. Comparative Biochemistry & Physiology 21, 405–14.CrossRefGoogle ScholarPubMed
Hoffman, E. & Shaffer, C. S. (1950). Thyroid weight and function as influenced by environmental temperature. Poultry Science 29, 365–76.CrossRefGoogle Scholar
Kappogoda, C. T. & Linden, R. J. (1972). A critical assessment of an open-circuit technique for measuring oxygen consumption. Cardiovascular Research 6, 589–98.CrossRefGoogle Scholar
Lasiewski, R. C, Acosta, A. L. & Bernstein, M. H. (1966). Evaporative water loss in birds. I. Characteristics of the open-flow method of determination, and their relation to estimates of thermoregulatory ability. Comparative Biochemistry & Physiology 19, 445–57.CrossRefGoogle Scholar
Lasiewski, R. C. & Dawson, W. R. (1967). A reexamination of the relation between standard metabolic rate and body weight in birds. Condor 69, 13–22.CrossRefGoogle Scholar
Menuam, B. & Richards, S. A. (1975). Observations on the sites of respiratory evaporation in the fowl during thermal panting. Respiration Physiology 25, 39–52.CrossRefGoogle ScholarPubMed
Mount, L. E. (1974). The concept of thermal neutrality. In Heat Loss from Animals and Man(ed. Monteith, J. L. and Mount, L. E.), pp. 425–39. London: Butterworth.CrossRefGoogle Scholar
O'Neill, S. J. B., Balnave, D. & Jackson, N. (1971). The influence of feathering and environmental temperature on the heat production and efficiency of utilization of metabolizable energy by the mature cockerel. Journal of Agricultural Science, Cambridge 77, 293–305.CrossRefGoogle Scholar
Perek, M. & Sulman, F. (1945). The basal metabolic rate in moulting and laying hens. Endocrinology 36, 240–3.Google Scholar
Richards, S. A. (1971). The significance of changes in the temperature of the skin and body core of the chicken in the regulation of heat loss. Journal of Physiology 216, 1–10.CrossRefGoogle ScholarPubMed
Richards, S. A. (1976). Evaporative water loss in domestic fowls and its partition in relation to ambient temperature. Journal of Agricultural Science, Cambridge 87, 527–32.CrossRefGoogle Scholar
Romijn, C. & Lokhorst, W. (1961). Climate and poultry. Heat regulation in the fowl. Tijdschrift voor Diergeneeskunde 86, 153–72.Google Scholar
van Kampen, M. (1976). Activity and energy expenditure in laying hens. 3. The energy cost of eating and posture. Journal of Agricultural Science, Cambridge 87, 85–8.CrossRefGoogle Scholar
Waring, J. J. & Brown, W. O. (1965). A respiration chamber for the study of energy utilization for maintenance and production in the laying hen. Journal of Agricultural Science, Cambridge 65, 139–46.CrossRefGoogle Scholar