Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-14T04:29:30.006Z Has data issue: false hasContentIssue false
  • English
  • Français

The periodicity and duration of oestrus in zebu and grade cattle

Published online by Cambridge University Press:  27 March 2009

James Anderson
James Anderson
Affiliation:
Experimental Station, Naivasha, Kenya
Get access Rights & Permissions [Opens in a new window]

Extract

Records are given for 1130 oestrous cycles in zebus and 678 cycles in grades. The mean length was 23·03 days in zebus and 22·42 days in grades. The mean duration of oestrus was 4·78 hr. in zebus. 7·40 hr. in grades. Neither exposure to additional light at night nor feeding a supplementary ration had any effect on the cycle of oestrus.

Seasonal variations in both the cycle and oestrus occurred in zebus, but in grades they were much less marked. An association between climatic conditions and sexual function was noted in that a season of increased temperature and sunshine was associated with increased sexual function and vice versa.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 34 , Issue 2 , April 1944 , pp. 57 - 68
Copyright
Copyright © Cambridge University Press 1944

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anderson, J. (1936). Emp. J. Exp. Agric. 4, Part I, 186; Part II, 198.Google Scholar
Baker, J. R. (1936). J. Anim. Ecol. 5, 94.CrossRefGoogle Scholar
Baker, J. R. (1937). Nature, Lond., 140, 890.CrossRefGoogle Scholar
Belham, E. G. (1937). The Climate of the British Isles. London: Macmillan.Google Scholar
Bissonnette, T. H. (1936). J. Hered. 27, 171.CrossRefGoogle Scholar
Daubney, R. (1942). East Afr. Agric. J. January.Google Scholar
Hammond, J. (1927). The Physiology of Reproduction in the Cow. Camb. Univ. Press.Google Scholar
Hays, W. P. (1926). J. Dairy Sci. 9, 219.CrossRefGoogle Scholar
Lee, M. O. (1926). Amer. J. Physiol. 78, 246.CrossRefGoogle Scholar
Marshall, F. H. A. (1936). Philos. Trans. B, 226, 423.Google Scholar
Orr, J. B. & Holm, A. (1931). 6th Rep. Econ. Advis. Coun. Committee on Mineral Content of Natural Pastures. H.M.S.O.Google Scholar
Regan, W. M. & Richardson, G. H. (1938). J. Dairy Sci. 21, 73.CrossRefGoogle Scholar
Rhoad, A. (1936). J. Agric. Sci. 26, 36.CrossRefGoogle Scholar
Rhoad, A. (1940). Emp. J. Exp. Agric. 8, 190.Google Scholar
Ritzmann, E. G. & Benedict, F. G. (1938). Nutritional Physiology of the Adult Ruminant. Carnegie Institute of Washington.Google Scholar