Schefrahn et al. (1998a,b) aimed to outline the possible contributions of g
enetics to conservation biology: the determination of genetic variation of
wild groups and its use as a guideline in breeding programs. Unfortunately,
the amount of genetic variation within wild groups of nonhuman primates is
rarely known. In particular, this observation holds for prosimians. Averag
e heterozygosity is widely considered to be a good indicator of the magnitu
de of intraspecific variation. We provide some values of average heterozygo
sity of wild populations of Otolemur garnettii, Eulemur macaco macaco and E
. m. flavifrons.