Live weight variation and relationship with body measurements in ranched N'dama and Goudali cattle in southwest Gabon
Abstract
The N’dama taurine and the Goudali zebu were introduced and have been bred in Gabon for several decades, but the evolution of their live weight (LW) and morphology in this equatorial country was not documented. The influence of sex and season on their LW and the relationships between the LW and some body measurements were determined in the Nyanga ranch in southwest Gabon. Before one year of age, sex does not influence LW in these two breeds. After one year of age, uncastrated males of both breeds are heavier than females. Castrated males are heavier than uncastrated males only at one and two years of age and in N'dama. The dry season only had a negative effect on the LW on young N’dama of less than one year old. The LW of N'dama is highly correlated with the heart girth (HG) (r=0.93), then the shoulder to tail drop (STD) (r=0.88) and the height at withers (HW) (r=0.82) while that of Goudali is rather correlated with the STD (r=0.85), then HW (r=0.83) and HG (r=0.82). These results show an adaptation of these breeds to the equatorial environment of the Nyanga ranch in Gabon.
Keywords: Native cattle, N'dama, Goudali, Southern Gabon Performances
