Effect of trypanosome infection, control of parasitaemia and control of anaemia development on productivity of N'Dama cattle
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Permanent link to cite or share this item: http://hdl.handle.net/10568/28038
Presents results of a study undertaken firstly to measure the relative effects in N'Dama cattle of length of time detected parasitaemic; intensity of parasitaemia; and control of development of anaemia; on reproductive performance (calving interval), maternal ability (calf weaning weight) and cow productivity (weight of weaner calf per cow per annum). Secondly, estimation of the repeatabilities of these aspects of trypanosome infection relative to repeatabilities of performance traits was undertaken. This would indicate possible upper limits to their degree of genetic determination and heritability. Thirdly, the effects on calf weaning weight of control of parasitaemia and anaemia development in both the calf and its dam were evaluated simultaneously with the objective of providing indications as to whether a test for trypanotolerance might be feasible early in the animals life.