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Research, Policy and Practice

Table 3 Small stock production parameters in Turkana County in 2010

From: Economic losses associated with Peste des petits ruminants in Turkana County Kenya

Parameter Sheep Goats
B = birth weight (kilograms) 1.9 2.1
K = normal inter-kidding/lambing interval in days 252 344
Q = inter-kidding/lambing interval in sick animals in days 417 509
V a = normal volume milk production in litres 0.49 0.73
V l = volume of milk loss per PPR case 0.3 0.4
T l = lactation period in days 120 120
T r = duration days of reduced milk production per surving PPR case 20 20
C m = sale value of milk (US$/litre) 0.58 0.58
C me = value of TLU (US$/kilogram) 0.6 0.6
W l = proportion (%) of weight loss in surviving PPR case 30 30
P f = proportion (%) of pregnant animals 20 15
L f = proportion (%) of lactating animals 15.84 18.75
S m…f = proportion (%) of breeding females 37.67 36.12
N = sheep and goat population in Turkana 3,517,151 5,994,861