The analysis of the oestrus activity of the five breeds of sheep for seasonality in the tropics

Abstract

The objective of the study was to examine the oestrus activity of Somali, Nandi, Merino, Romney Marsh and Karakul breeds of sheep in the tropics for seasonality. Chapter I introduces the work of other researchers in this field. - Chapter II deals with how the experiment on oestrus activity of the five breeds of sheep was conducted. The experiment was carried out at Kabete, Kenya, in three phases from 2.. ' June 1966 to 26th December 1969. A flock of ewes comprising all the five breeds were grazed together with two vasectomized rams carrying raddle. harnesses. Ewes were observed daily for raddle marks which were interpreted to indicate normal mating or marks that might have arisen from mounting by a ram not associated with mating.Each remained with the ewes for two weeks. Disease control consisted of vaccination of sheep ." against clostridial disease