Figure 1.
A red howler monkey and a yellow-breasted capuchin monkeys retrieving food in the different reaching-for-food tasks.
A yellow-breasted capuchin monkey reaching for food scattered on a surface (A) and presented on the opposite side of a wire mesh (B). A red howler monkey reaching for food presented inside a suspended container (C). The yellow-breasted capuchin monkey reaching for food presented inside a portable container (D).
Figure 2.
The overall mean ± se HI values for the red howler monkeys (n = 12) and the yellow-breasted capuchin monkeys (n = 7). *p <0.050.
Table 1.
The Overall Hand and Mouth Usage for the Red Howler Monkeys and the Yellow-Breasted Capuchin Monkeys.
Figure 3.
Mean ± se HI values per reaching-for-food task for the red howler monkeys (scattered: n = 12; inside a suspended container: n = 9) and the yellow-breasted capuchin monkeys (scattered: n = 6; on the opposite side of a wire mesh, inside a suspended container, inside a portable container: n = 7). Vertical bars indicate SE.
Table 2.
Hand Usage across the Different Reaching-for-Food Activities for the Red Howler Monkeys and the Yellow-Breasted Capuchin Monkeys.
Figure 4.
Mean ± se HI values per body posture for the red howler monkeys (sitting: n = 9; tripedal, hanging: n = 11) and the yellow-breasted capuchin monkeys (sitting and tripedal: n = 7; bipedal, clinging, hanging: n = 6). Vertical bars indicate SE.
Table 3.
Hand Usage According to the Different Body Postures Acquired by the Red Howler monkeys and the Yellow-Breasted Capuchin monkeys.