Effect of sex and age on post weaning growth performance of Sokoto Gudali weaner calves

Abstract

The effects of sex and age on post weaning at different ages were investigated. Eighteen male and 18 female Sokoto Gudali calves were either weaned at 6 (n = 18) or 7 (n = 18) months of age. Vocalization activity and some behaviours (feeding, lying and walking / standing) were observed during the first 3 days following weaning. Body weight was recorded at 6 and 7 months and 2 weeks following weaning. Calves weaned at 6 months vocalized more often than calves weaned at 7 months and the females calves vocalised more than males on the first day (P < 0.05). The vocalization activity decreased at a higher rate in calves weaned at 7 months than in calves weaned at 6 from days 1 to 3. On day 2, calves weaned at 6 months spent less time lying and more walking / standing than calves weaned at 7 months (P < 0.05). Behaviours did not differ between males and females. Average daily gain after weaning did not differ between weaning ages (P > 0.05), but calves weaned at 7 months gained more from 6 to 7 months of age. In conclusion, weaning distress was more pronounced in calves weaned at 6 months than in calves weaned at 7 months. Calves weaned at 7 months also had a superior growth performance during 6 to 7 months of age. Form then results obtained in this study; it has been concluded that the effect of the calves' sex was less pronounced. It is recommended to wean beef calves later than 6 months.