![]() ![]() Additionally, anthropogenic disturbance is far from uniform and may affect individual forest fragments in a single landscape in differing ways. Different threats arise depending on the species' life history strategy, dietary requirements and habitat preference. Many primate species currently subsist in fragmented and anthropogenically disturbed habitats. This very fast development despite an incomplete neuromuscular development highlights the importance of this grasping function directly after birth. tibia and metatarsus) allowing them to have near‐maximal levels of grasping strength. ![]() Moreover, younger individuals had relative longer hindlimbs (i.e. Our results show an early onset of grasping in young mouse lemurs. pull strength) traits for both limbs during the development of a small arboreal primate, the gray mouse lemur (Microcebus murinus). We quantified manual grasping strategies and the associated morphometric (i.e. In this context, an intraspecific ontogenetic approach offers the opportunity to describe the relations between patterns in grasping behavior and patterns of grasping morphology. Interspecific comparative studies show that a given morphology can induce different grasping behaviors and also that a given behavior can be performed using different morphological structures. However, the precise functional and ecological contexts that have driven this evolution remain unclear. Anatomical specializations of the prehensile extremities originated early‐on in their evolution. In primates, grasping constitutes a vital function involved in many behaviors. Finally, given differences in the positional repertoire of adult and immature golden snub-nosed monkeys, we argue that studies of ontogenetic patterns of positional behavior should emphasize what it takes to survive at each life stage rather than what it takes to match an adult repertoire. ![]() With increasing age, the use of quadrupedal walking and dropping (downward in-air displacement of body mass that does not require hindlimb propulsion) increased and the use of leaping, suspensory postures, and bridging decreased. In addition, we found that while infants and juveniles used similar postural and locomotor behaviors as their adult counterparts, younger golden snub-nosed monkeys more frequently engaged in risky or escape-oriented behaviors such as climbing, running, leaping, and forelimb suspension. roxellana are reported to exhibit a body mass nearly two times that of adult females, we found no significant sex differences in the positional repertoire during feeding and traveling. Our results indicated that among all age and sex classes, sitting was the most common feeding and resting posture and during travel, quadrupedal walking was the dominant locomotor behavior. In this study, we examined age- and sex-based patterns of positional behavior and substrate utilization in wild golden snub-nosed monkeys (Rhinopithecus roxellana), an endangered species of Asian colobine. Body mass plays an important role in primate positional behavior and in sexually dimorphic arboreal primate species may influence how immature and adult individuals travel through the forest canopy and access food resources. ![]()
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