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Comparative reproductive performance of Brahman and Santa Gertrudis cattle in a hot humid environment 2. Factors affecting calving interval

Published online by Cambridge University Press:  02 September 2010

A. Wilson  and
M. B. Willis
A. Wilson
Affiliation:
Faculty of Agriculture, University of Newcastleupon Tyne NE1 7RU
M. B. Willis
Affiliation:
Faculty of Agriculture, University of Newcastleupon Tyne NE1 7RU
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Summary

Over a 15-year period 1011 calving intervals from 187 Brahman (B) cows and 687 calving intervals from 146 Santa Gertrudis (SG) were examined. Year of calving significantly affected intervals in both breeds. Season of calving and parity of dam were both important in SG. Longer intervals were seen in B than SG (437 v. 406 days). Repeatability of calving interval was low (< 0·02). The average life-time calving interval was significantly related to total calf production in that cows with shorter mean intervals had more calves in their lifetime.

Type
Research Article
Information
Animal Production , Volume 18 , Issue 1 , February 1974 , pp. 43 - 48
Copyright
Copyright © British Society of Animal Science 1974

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References

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