ABSTRACT
The objectives of a nonhuman primate survey may include determination of the total number of primates in a specified area, geographical distribution of the various species, mean group size, sex and age composition, reproductive performance, and an evaluation of interactions with human populations. Several important factors that contribute to the final selection of one or several survey methods include cost, definition of the survey area, duration of the survey, project manpower and equipment, habitat types, and primate activity patterns. Auditory cues consist of vocalizations and foliage displacements. Differences in density estimates may be attributable to census and research techniques as well as such variables as climate conditions and the length of study. The large variability of relative density estimates between seasons and among repeat surveys suggests that short-term census investigations may be inaccurate samples of population densities.
