J. Anim Sci.
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J. Anim Sci. 1971. 32:296-300.
© 1971 American Society of Animal Science
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Respiration Rate and Rectal Temperature in the Newborn Lamb1

R. H. Simms2, 3,

Purdue University Agricultural Experiment Station, Lafayette, Indiana 47907

Abstract

NUMEROUS hypotheses suggest that sheep exhibit a more efficient body temperature regulating mechanism than cattle, swine or chickens. However, neonatal lambs, as well as pigs and calves, can become fatally chilled following parturition. Mortality rates of 20% are not uncommon in farm flocks as noted by Venkatachalom et al. (1949) or under range conditions as reported by Moule (1954). Alexander (19S8) reported that small lambs resulting from twin births, or single births from ewes receiving a sub-standard gestation ration exhibited a more pronounced postnatal temperature decrease than individuals of heavier birth weights. Pomeroy (1960) and Curtis, Heidenreich and Martin (1967) found that heavier birth weights were not associated with anatomical development and maturity although higher mortality rates are commonly associated with lighter pigs within litters. Prevention of postnatal fatalities due to cold or cold, wet environmental conditions presents a serious management problem in many livestock enterprises.

Previous research has shown that newly born pigs and newly hatched chicks have poorly developed body temperature regulating mechanisms.

Footnotes

1 Department of Animal Sciences Journal Paper No. 4033, Purdue University Agricultural Experiment Station.

2 The data are from a thesis submitted by the author to the Graduate School, Purdue University, in partial fulfillment of the requirements for the degree of Master of Science.

3 Present address: University of Illinois, Cooperative Extension Service, Area Extension Center, Box 189, Macomb, Illinois 61455.






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Copyright © 1971 by the American Society of Animal Science.