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Research, Policy and Practice

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Table 4 Overall livestock demographic indicators by species

From: Livestock herd structures and dynamics in Garissa County, Kenya

Variable/species Camels Cattle Sheep Goats
Annual multiplication rate
(herd size at the date of survey/herd size 12 months ago)
0.39 0.97 0.63 0.82
Annual population growth rate
(annual multiplication rate − 1) * 100
−61 % −3 % −37 % −18 %
Annual production rate (P/N) −0.5 −0.3 −0.3 −0.1
P = (herd size at the date of survey − herd size 12 months ago) + (number of offtakes over the year − number of intakes over the year)
N = mean herd size over the year
Annual mortality rate
(probability or hazard rate for an animal to die a natural death = (number died in 12 months/herd size 12 months ago) * 100)
50 % 69 % 32 % 16 %
Offtake rate
(probability or hazard rate for an animal to exit the herd as offtake = (offtake/herd size 12 months ago) * 100)
83.6 % 116.5 % 43.8 % 29.6 %
Commercial offtake rate
(sales/herd size 12 months ago) * 100
39.3 % 64.1 % 18.9 % 12.5 %
Intake rate
(probability or hazard rate for an animal to enter the herd as an intake = (intake/herd size 12 months ago) * 100)
58.5 % 143.8 % 31.9 % 23.4 %