Subsequent to population growth, land scarcity and the diminishing yie
lds, Kikuyu started a search for arable land. This migration has been
extended toward areas which are unsuitable for agriculture, where surv
ival strategies of Kikuyu migrants have been analysed. Results of the
extended data collection have shown that a range of social practices w
ithin the mainly patrimonial families enable them to survive in the se
mi-arid savannah on the Laikipia plain (Kenya), Two strategies could b
e distinguished: on the levels of the individuals the mobility may be
described as personal transhumance, and on the level of the domestic u
nits as steps on the various islands of a vertical archipelago; both a
re characteristics of a family circulation that constitutes a migrator
y scheme prevailing among the Kikuyu, with a model of migratory practi
ces which associates individual tactics and the strategies applied by
domestic units (Y. D. & B. S.).