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Activity budgets are widely used in primate behavioral studies for the analysis of ecological strategies. In some cases, there is considerable seasonal variation in the length of the daily activity period. Here, activity budgets from two field studies of Callithrix flaviceps were compiled first by the traditional approach (proportion of scan sample records) and then by considering the proportion of...
Many primates are able to satisfy most of their water requirements from the liquid content of their food, but almost all need to visit external water sources during critical periods. The present study analyses the use of water sources in two free-ranging groups of buffy-headed marmosets (Caratinga and RBAR groups) over an annual cycle. At both sites, a large proportion of the days had no visits, and...
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