Cortisol metabolites vary with environmental conditions, predation risk, and human shields in a wild primate, Cercopithecus albogularis

LaBarge, Laura R.; Allan, Andrew T. L.; Berman, Carol M.; Hill, Russell A.; Margulis, Susan W.

doi:10.1016/j.yhbeh.2022.105237

Cited by 2 publications

(2 citation statements)

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“…While there is a paucity of research specifically exploring the FGCM responses of primates to researchers, one such study focused on South African samangos ( Cercopithecus albogularis ). LaBarge et al [ 94 ] found that female FGCM acute responses to predators flattened as observer numbers increased. While it was not possible to determine if this decreased response was due to observers inadvertently deterring predators, it does lend support to the idea that the presence of several familiar humans might affect primate perception of danger [ 94 ].…”

Section: Discussionmentioning

confidence: 99%

“…LaBarge et al [ 94 ] found that female FGCM acute responses to predators flattened as observer numbers increased. While it was not possible to determine if this decreased response was due to observers inadvertently deterring predators, it does lend support to the idea that the presence of several familiar humans might affect primate perception of danger [ 94 ]. Future studies that pair FGCM levels with specific tourist/macaque interaction data may clarify this issue.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Tourist and Researcher Presence on Fecal Glucocorticoid Metabolite Levels in Wild, Habituated Sulawesi Crested Macaques (Macaca nigra)

Bertrand,

Berman,

Heistermann

et al. 2023

Animals

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Ecotourism managers and researchers often assume that apparently habituated primate groups no longer experience adverse consequences of prolonged exposure to tourists or researchers. We examined the effects of tourists and researchers on fecal glucocorticoid metabolite output (FGCM) in three critically endangered, wild crested macaque (Macaca nigra) groups in Tangkoko Nature Reserve, Sulawesi, Indonesia. We assayed FGCM from 456 fecal samples collected from thirty-three adults. Tourists can walk through and among macaque groups freely. Hence, we examined the possible effects of tourists both (1) in the reserve when away and not interacting with the study groups and (2) when they were present within the macaque groups. Generalized Linear Mixed Model (GLMM) analysis indicated that when tourists were present in the forest, but not directly among the macaques, FGCM levels in the macaque tourism groups were higher in months with more tourists. When tourists were among the macaque groups, some female macaques experienced rises and subsequent postexposure decreases in FGCM levels, consistent with predictions for acute stress. Male FGCM levels increased with tourist numbers within the group. Nevertheless, they were not significantly different from levels during undisturbed or postexposure conditions. FGCM responses related to researchers in groups varied by group, sex, and tourist presence. However, the temporal patterning of FGCM responses showed little evidence of chronic stress from tourism at this site.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%