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Factors affecting birth weight of Holstein-Friesian calves in Western Nigeria

Published online by Cambridge University Press:  27 March 2009

J. A. Adeneye
Affiliation:
Institute of Agricultural Research and Training, University of Ife, Moor Plantation, Ibadan, Nigeria.
T. A. Bamiduro
Affiliation:
Department of Statistics, University of Ibadan, Ibadan, Nigeria.
Adetowun K. Adenbanjo
Affiliation:
Institute of Agricultural Research and Training, University of Ife, Moor Plantation, Ibadan, Nigeria.
A. A. Akinyemi
Affiliation:
Institute of Agricultural Research and Training, University of Ife, Moor Plantation, Ibadan, Nigeria.

Summary

The birth weight of Friesian and Holstein calves in Western Nigeria was generally lower than that recorded in other tropical countries. This was attributed to a low plane of nutrition during pregnancy and a consequent reduction in length of gestation of the dams. On average, pure-bred Friesian, pure-bred Holstein and Holstein x Friesian calves weighed 29·1, 30·8 and 30·7 kg respectively at birth. Male and female Friesian, Holstein and cross-bred calves averagely weighed 29·9 and 28·2 kg, 29·9 and 31·7 kg, and 32·6 and 28·8 kg respectively. Both the sex differences and breed x sex interaction were not significant.

Positive correlation coefficients of 0·45, 0·38 and 0·26 found between calf birth weight and gestation length for the Friesians (P < 0·05), Holsteins (P < 0·01) and their crosses (P > 0·05) respectively suggest that gestation length had a significant effect on Friesian and Holstein calf birth weight. In many cases, parturition occurred 8–16 days earlier than expected.

Calves born during the rainy season (April–September) were approximately 10% heavier at birth than those born during the dry season (October–March). The heaviest calves were born during the second half (July–September) of the rainy season. The breed x sex x season of calving interaction was significant for the Holstein breed (P < 0·05). Holstein male calves born during the rainy season were significantly (P <; 0·05) heavier than those born during the dry season. Friesian dams with three or more parities and Holstein dams that were 3 years old and above produced calves that were significantly (P < 0·01) heavier at birth than calves of younger dams.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1977

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