Effects of changing housing conditions on mangabey behavior (Cercocebus atys): Spatial density, housing quality, and novelty effects
Open accessAbstract
The separate influences of spatial density and housing quality on the behavior of captive animals are difficult to measure because the two factors are often intrinsically linked. Here, we recorded affiliative and agonistic behavior in adult sooty mangabeys in various housing situations, testing spatial density and housing quality changes separately (N = 26 experienced spatial density changes; N = 12 experienced housing quality changes). We varied spatial density by 50% while holding housing quality constant and we varied housing quality while holding spatial density constant (achieved by comparing two types of run-housing that varied in the amount of visual privacy and outdoor access). Each housing condition was one month in duration. Prior to collecting data in each housing condition, we evaluated the subjects' initial responses to the change in housing environment during 2-week novelty periods. Affiliative behavior did not change during the novelty periods. Agonistic behavior initially increased slightly when spatial density increased and it decreased significantly when spatial density decreased; it also decreased when subjects moved to housing that offered more visual privacy and outdoor space, indicating that the mangabeys were sensitive to these housing changes. After the novelty periods, affiliative behavior increased under higher spatial density, but remained unchanged across housing quality conditions; agonistic behavior remained unchanged across all conditions. Results suggest that a prolonged increase in spatial density led the mangabeys to adopt a tension-reduction coping strategy, in which the increase in affiliative behavior alleviates a presumed increase in social tension. Reducing visual privacy and choice did not affect the mangabeys' behavior, post-novelty period. Thus, like many other primates, the mangabeys managed tension by flexibly adapting to changes in their housing environment in ways that reduce the risk of severe aggression. This study highlights the importance of controlled behavioral studies in facilitating data-driven management decisions that promote animal welfare. Am. J. Primatol. 77:1001-1014, 2015. © 2015 Wiley Periodicals, Inc.
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Experimental studies of captive primates show that high population density can lead to an increase in the rate of aggression, or can have no effect.
“and experimental studies of captive primates show that high population density can lead to an increase in the rate of aggression, or can have no effect (Cordoni and Palagi, 2007; Crast et al., 2015).”
From Hypotheses for the Evolution of Reduced Reactive Aggression in the Context of Human Self-Domestication (2019) · cites this paper as Crast et al., 2015
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Wrangham, R. W. (2019) · Frontiers in Psychology · doi:10.3389/fpsyg.2019.01914 · Cited by 97 · see citing works
- Authors
- Crast, J., Bloomsmith, M. A., & Jonesteller, T.
- Affiliations
- Emory University (US)
- Corresponding author
- Crast, Jessica
- Venue
- American Journal of Primatology
- Publisher
- Wiley
- Published
- 2015-06-25
- Volume
- 77
- Issue
- 9
- Pages
- 1001-1014
- ISSN
- 0275-2565 (ISSN-L)
- 1098-2345
- PMC
- PMC4691223
- OpenAlex
- W2135333264
- Cited by
- 7
- References
- 42
- Citations by year
- 2023: 2 · 2021: 3 · 2019: 1 · 2018: 1
- FWCI
- 0.55
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- American Journal of Primatology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health ((OD P51)OD011132)
- Topics
- Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
- Health Sciences › Veterinary › Small Animals › Animal Behavior and Welfare Studies
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
- Keywords
- sooty mangabey, Cercocebus atys, captive primate welfare, spatial density, housing quality, affiliative behavior, agonistic behavior, novelty effect, coping strategies, social tensions, visual privacy, outdoor access, behavioral adaptation
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