Ec. Price et Hm. Piedade, Ranging behavior and intraspecific relationships of masked titi monkeys (Callicebus personatus personatus), AM J PRIMAT, 53(2), 2001, pp. 87-92
Two neighboring groups of masked titi monkeys (Callicebus personatus person
atus) were observed for nearly 240 hr over a 5-mo period. Minimum home rang
e estimates for the groups were 10.7 and 12.3 ha; daily path length average
d 1 km. Each group shared a minimum of nearly 20% of its range with neighbo
rs, and encounters between groups were rare and exclusively vocal. There wa
s no strong evidence that titis called at the edge of their ranges or used
non-overlap areas more intensively. Masked titis at this site were therefor
e not markedly territorial, in contrast to other descriptions of this genus
. However, this study was carried out at a time of unusually low rainfall,
which may have influenced behavior. Further longer-term studies of adjacent
groups are therefore required to assess environmental, specific, and subsp
ecific factors affecting territoriality in this genus. (C) 2001 Wiley-Liss,
Inc.