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Influence of natural service on length of oestrus in the cow

Published online by Cambridge University Press:  01 October 1961

Jorge de Alba ,
Eduardo Villa Corta  and
Gustavo Ulloa
Jorge de Alba
Affiliation:
Interamerican Institute of Agricultural Sciences, Turrialba, Costa Rica
Eduardo Villa Corta
Affiliation:
Interamerican Institute of Agricultural Sciences, Turrialba, Costa Rica
Gustavo Ulloa
Affiliation:
Interamerican Institute of Agricultural Sciences, Turrialba, Costa Rica
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Extract

Observations on duration of the period of receptivity in two groups of Milking Criollo, one of Jersey and one of Brahman cows are presented. After one or two oestrus periods measured without service the cows were bred naturally in the case of Jerseys, Brahmans and one group of Milking Criollos. In the other group of Milking Criollos, artificial insemination was used. The period of receptivity was shortened after natural service by 8·7 hours in Milking Criollo and by 4·1 hours in Brahman cows. No shortening of oestrus occurred in the Jerseys and no significant shortening in artificially inseminated Milking Criollos.

Nine of the cows under observation (and seven other cows with some Zebu blood) allowed only one service by the bull.

Type
Research Article
Information
Animal Production , Volume 3 , Issue 3 , October 1961 , pp. 327 - 330
Copyright
Copyright © British Society of Animal Science 1961

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References

REFERENCES

Anderson, J., 1936. Studies in reproduction in cattle. The periodicity and duration of oestrus. Emp. J. exp. Agr., 4: 186.Google Scholar
Ulloa, G. E., 1954. Ciclo estrual, longitud del estro y resistencia a ectop´rasites en el ganado criollo. (Unpublished Thesis.) Interamerican Institute of Agricultural Sciences, Turrialba, Costa Rica.Google Scholar
Villa Corta, E., 1960. Cicloestrual, duratión del calor y tiempo de ovulación de bovinos en el trópico. Vet. y Zootec. (Lima) Perú 12(32): 4–6.Google Scholar