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Genetic variation of rectal temperature in cows and its relationship to fertility

Published online by Cambridge University Press:  02 September 2010

H. G. Turner
H. G. Turner
Affiliation:
Tropical Cattle Research Centre, CSIRO Division of Animal Production, PO Box 545, North Rockhampton, Queensland 4701, Australia
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Abstract

Rectal temperatures of breeding cows at the National Cattle Breeding Station, ‘Belmont’, Rockhampton were recorded in each of 2 years. The data analysed represented two Bos taurus (Hereford × Shorthorn) and four B. indicus × B. taurus half-bred lines, and 800 to 900 cows in each year. Rectal temperatures averaged 39·8°C, and were 0·5°C higher in British breed than in zebu-cross cows and 0·3°C higher in lactating than in dry British cows (no effect in zebu cross).

Fertility, measured as success or failure in producing a calf at term, was affected by rectal temperature (P<0·0001 in both years). The relationship was curvilinear, the reduction in calving rate due to 01°C increment in temperature being 0009 at 39°C, 002 at 40°C and 0035 at 41°C. Response of fertility to a given change in rectal temperature was the same in different breeds. The average depression of fertility due to heat susceptibility was 015 to 0·25 in British-breed and approximately 010 in zebu-cross herds.

Even in relatively heat-tolerant zebu crossbreds and in a relatively mild environment on the Tropic, both the mean rectal temperature and its genetic variability within a herd had quite large effects on reproduction. The heritability of rectal temperature was 0·25 (s.e. 012) and its genetic correlation with fertility was −0·76 (s.e. 0·35). There was a parallel effect of rectal temperatures of cows on the birth weights of their calves.

Type
Research Article
Information
Animal Production , Volume 35 , Issue 3 , December 1982 , pp. 401 - 412
Copyright
Copyright © British Society of Animal Science 1982

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References

REFERENCES

Bond, J. and McDowell, R. E. 1972. Reproductive performance and physiological responses of beef females as affected by a prolonged high environmental temperature. J. Anim. Sci. 35: 820–829.CrossRefGoogle ScholarPubMed
Da Silva, R. G. 1973. Improving tropical beef cattle by simultaneous selection for weight and heat tolerance. Heritabilities and correlations of the traits. J. Anim. Sci. 37: 637–642.CrossRefGoogle Scholar
Deese, R. E. and Koger, M. 1967. Heritability of fertility in Brahman and crossbred cattle. J. Anim. Sci. 26: 984–987.CrossRefGoogle ScholarPubMed
Frisch, J. E. 1981. Changes occurring in cattle as a consequence of selection for growth rate in a stressful environment. J. agric. Sci., Camb. 96: 23–38.CrossRefGoogle Scholar
Gwazdauskas, F. C., Thatcher, W. W. and Wilcox, C. J. 1973. Physiological, environmental, and hormonal factors at insemination which may affect conception. J. Dairy Sci. 56: 873–877.CrossRefGoogle ScholarPubMed
Health Sciences Computing Facility. 1977. BMDP Biomedical Computer Programs, P-Series. University of California Press, Berkeley, Ca.Google Scholar
Ingraham, R. H., Stanley, R. W. and Wagner, W. C. 1976. Relationship of temperature and humidity to conception rate of Holstein cows in Hawaii. J. Dairy Sci. 59: 2086–2090.CrossRefGoogle ScholarPubMed
Oritz, V. C. 1974. Genetic and environmental parameters of production in Brahman cattle. Diss. Abstr. Int., B. 34: 6 (Abstr.)Google Scholar
Roller, W. L. and Stombaugh, D. P. 1974. The influence of environmental factors on reproduction of livestock. Proc. int. Live Stk Environ. Symp., pp: 31–50. American Society of Agricultural Engineers, St Joseph, Mich.Google Scholar
Roman-Ponce, H., Thatcher, W. W., Buffington, D. E., Wilcox, C. J. and Van horn, H. H. 1977. Physiological and production responses of dairy cattle to a shade structure in a subtropical environment. J. Dairy Sci. 60: 424–430.CrossRefGoogle Scholar
Seebeck, R. M. 1973. Sources of variation in the fertility of a herd of zebu, British, and zebu × British cattle in Northern Australia. J. agric. Sci., Camb. 81: 253–262.CrossRefGoogle Scholar
Seebeck, R. M. 1982. SYSNOVA Version 9. Reference manual. Tech. Pap. Anim. Res. Lab. C.S.I.R.O. Aust. In press.Google Scholar
Stott, G. H. 1974. Discussion of the influence of environmental factors on reproduction of livestock. Proc. int. Live Stk Environ. Symp., pp. 51–54. American Society of Agricultural Engineers, St Joseph, Mich.Google Scholar
Stott, G. H. and Williams, R. J. 1962. Causes of low breeding efficiency in dairy cattle associated with seasonal high temperatures. J. Dairy Sci. 45: 1369–1375.CrossRefGoogle Scholar
Thwaites, C. J. 1969. Embryo mortality in the heat-stressed ewe. II. Applications of hot-room results to field conditions. J. Reprod. & Fert. 19: 255–262.CrossRefGoogle ScholarPubMed
Turner, H. G. 1979. Genetic correlation between heat tolerance and fertility in beef cows. Proc. Inaugural Conf. Aust. Ass. Anim. Breed. Genet., Univ. New Engl., Armidale, pp. 56–58.Google Scholar
Yeates, N. T. M. 1953. The effect of high air temperature on reproduction in the ewe. J. agric. Sci., Camb. 43: 199–203.CrossRefGoogle Scholar
Yeates, N. T. M. 1958. Foetal dwarfism in sheep—an effect of high atmospheric temperature during gestation. J. agric. Sci., Camb. 51: 84–89.CrossRefGoogle Scholar