The data gathered by human observers studying the behavior of nonhuman primates often reveal a social structure of apparently striking complexity. Social groups are composed of a number of different families of different dominance ranks, each of which both competes and cooperates with other families in the group. It is often difficult for the observer to imagine that the monkeys could function ...

Electron microscopy revealed that 80% of captured vervet monkeys, held in quarantine for experimental use, showed extensive proliferation of spiral-shaped bacteria on the mucosal epithelium of the large bowel. A consortium, consisting of a predominant spirillum together with a spirochaete, was usually seen as a lawn covering the colonic epithelium. Sparsely populated areas showed preferential c...

Patas monkeys (Erythrocebus patas) living in African savanna woodlands and grassland habitats have a locomotor system that allows them to run fast, presumably to avoid predators. Long fore- and hindlimbs, long foot bones, short toes, and a digitigrade foot posture were proposed as anatomical correlates with speed. In addition to skeletal proportions, soft tissue and whole body proportions are i...

OBJECTIVE Obesity exists with and without accompanying cardiometabolic disease, termed metabolically unhealthy obesity (MUO) and healthy obesity (MHO), respectively. Underlying differences in the ability of subcutaneous (SQ) fat to respond to nutrient excess are emerging as a key pathway. This study aimed to document the first spontaneous animal model of MHO and MUO and differences in SQ adipos...

Di Bitetti, M. 2001. Food-associated calls in tufted capuchin monkeys (Cebus apella). Doctoral thesis, State University of New York at Stony Brook, New York. Di Bitetti, M. 2003. Food-associated calls of tufted capuchin monkeys (Cebus apella nigritus) are functionally referential signals. Behaviour 140: 565 –592. Fichtel, C. and Hammerschmidt, K. 2002. Responses of red-fronted lemurs to experim...

The main manifestations of Parkinson's disease (PD) are akinesia (poverty of spontaneous movements and difficulty in initiating a movement), bradykinesia (slowness of movement), muscle rigidity and a tremor of 4-7 Hz. The two major subtypes of the human disease present the akinetic/rigid symptoms with and without tremor (tremor dominant vs. akinetic/rigid dominant subtype, respectively). The ma...