performance of djallonké sheep under an extensive system of production in faranah, guinea.a total of 147 ewes, 4 rams and 188 lambs of their progeny of the djallonké breed of sheep were used to study the factors affecting reproductive and growth traits and the causes of lamb mortality. data on ewes were collected during a 12-month period, while those on the lambs born to 123 of the ewes were collected until they were 12 months of age. the average fertility and abortion rates were 0.84 and 0.09. the fertility rate increased and the abortion rate decreased with increasing age of the ew ...200111556620
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