Research, Policy and Practice
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 % |