Some morphometric and reproductive characteristics of Brown Atlas bulls in Algeria
DOI:
https://doi.org/10.19182/remvt.36363Keywords
cattle, Brown Atlas bulls, libido, scrotum, AlgeriaAbstract
The study describes the morphometric and reproductive parameters, and their influencing factors in 249 Brown Atlas bulls with an average age of 15.3 ± 3.7 months and a weight of 165.7 ± 50.7 kg. The height at withers, thoracic perimeter and scrotal circumference were 110.8 ± 8.5 cm, 137.2 ± 13.2 cm and 25.5 ± 3.7 cm, respectively. Among the bulls, 12.8% did not show any libido, in 22.1% of them it was excellent. The averages of the variables studied according to the age class showed a normal and progressive evolution from one class to another. Although, there were marked variations in the mean values of age (AgeM), height at withers (HGM) and scrotal circumference (CSM) at farm level. Our results also identified highly significant
correlations (p < 0.0001) between the mean values of chest circumference (TPM), HGM, CSM, and those of weight (PoidsM) and age (AgeM). Similarly, the linear model used showed a very high coefficient of determination (R2) between TPM, CSM, and AgeM (0.84) and PoidsM (0.62). On the other hand, it was very low (R2 = 0.35) between HGM, and AgeM and PoidsM. The analysis of variance of the parameters according to the farm and the age classes showed a highly significant effect (p < 0.0001) on the whole population and the 12–18-month class. Regarding libido, a significant effect of scores 2 and 3 for the 12–18-month age class was found.
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© A.Yahimi et al., hosted by CIRAD 2021
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