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Research, Policy and Practice

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Table 3 Aggregate herd status and changes per species in Garissa County, Kenya (These figures are used in the calculation of demographic rates in Table 4 below)

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

Variable/species Camels Cattle Sheep Goats
Mean herd size, at the date of survey 7.1 30.5 24.9 75.2
Mean entries 14.8 54.6 19.7 31.4
Intakes 10.7 45.3 12.6 21.3
Mean exits 26 61.1 34.3 47.4
Offtakes 15.3 36.1 17.3 27
Mean sales 7.2 20.2 7.5 11.4
Mean herd size, 12 months ago 18.3 31.5 39.5 91.2
Mean herd size over the year 12.7 31 32.2 83.2
  1. Herd size 12 months ago = size at the date of survey − entries + exits. Intakes = purchases + in-donations. Offtakes = sold + out-donated + consumed. Assume mean herd size over the year = (herd size to date + herd size 12 months ago)/2. Intakes are entries without births; offtakes are exits without mortalities and unexplained losses. Thus, intakes and offtakes are deliberate management entry/exit events