Evidence that zoo visitors influence HPA activity in spider monkeys (Ateles geoffroyii rufiventris)
There has been conflicting evidence about the impact of visitors on zoo animals. The present study was designed to increase understanding of visitor effect by assessing the relationship between visitor numbers and activity in the hypothalamic–pituitary–adrenal (HPA) axis. An enzyme-immunoassay was successfully developed and validated to quantify urinary cortisol in spider monkeys. The physiological impact […]
Chromosomal distinction between the red-faced and black-faced black spider monkeys (Ateles paniscus paniscus and A. p. chamek)
Abstract 10.1002/zoo.1430090406.abs The two subspecies of the black spider monkey, Ateles paniscus paniscus and A. p. chamek, can be distinguished by their chromosome number, 2n = 32 in the former and 2n = 34 in the latter. This difference most probably is the result of a tandem fusion between chromosomes 4 and 13 of the […]
Housing with Females Increases Testosterone and Cortisol Levels in Captive Groups of Black-Handed Spider Monkeys (Ateles geoffroyi)
The black-handed spider monkey (Ateles geoffroyi) is a seasonal reproducer that requires a seclusiveness to copulate and has a fusion–fission social system. These features impose important restrictions to achieve reproduction of captive animals. We investigated if group composition in captive spider monkeys has any endocrine effects. We compared testosterone and cortisol concentrations during the mating […]