Affiliative David’s Scores: An Analysis of Social Change over Two Years in a Semi-Free Ranging Group of Japanese Macaques (Macaca fuscata)

dc.contributor.advisorFrances, White
dc.contributor.authorShreeve, Caitlin
dc.contributor.authorCaitlin, Shreeve
dc.contributor.authorKylen, Garltland
dc.contributor.authorNichole, Biggs
dc.contributor.authorFrances, White
dc.date.accessioned2020-08-11T17:36:10Z
dc.date.available2020-08-11T17:36:10Z
dc.date.issued2020
dc.descriptionProject files are comprised of 1 page pdf and presentation recording in mp4 format.
dc.description.abstractTypically, dominance in primates is determined through aggressive interactions with initiation of aggression indicating higher dominance rank. David’s Score analyses using aggression are frequently used to calculate dominance hierarchies in primates. However, if fights are rare then it can be hard to identify male rank. Non-aggressive behaviors like grooming can also indicate rank based on directionality. For example, higher ranking males are often groomed more whereas lower-ranking males will do more grooming. For this study, we were interested in: 1) whether a dominance hierarchy could be constructed from non-aggressive behaviors, and 2) whether there were significant changes in grooming directionality and intensity over time. We examined a group of Japanese macaques (Macaca fuscata) at the Oregon National Primate Research Center. We collected a total of 475 hours of behavioral data between two summer study periods in 2018 and 2019. We collected data on 11 adult males using 15-minute focal follows with 1-minute instantaneous scans. We calculated David’s Scores for each male for 2018 and 2019 from grooming interactions and found hierarchical differences. Comparison between these scores demonstrated that the high-ranking males did not show a change in their David’s Score, indicating that their grooming effort remained constant. Lower-ranking males increased their grooming efforts directed at higher-ranking males while middle-ranking males showed only minor changes in their David’s Score. These data suggest that David’s Scores based on non-aggressive behaviors may be used to measure behavioral strategies and that the greatest increase in grooming effort is made by the low-ranking males.en_US
dc.format.mimetypevideo/mp4
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/1794/25524
dc.language.isoen_US
dc.publisherUniversity of Oregon
dc.rightsCreative Commons CC BY-NC-ND 4.0
dc.subjectDominanceen_US
dc.subjectPrimatesen_US
dc.subjectJapanese macaqueen_US
dc.subjectGroomingen_US
dc.subjectDavid's Scoresen_US
dc.titleAffiliative David’s Scores: An Analysis of Social Change over Two Years in a Semi-Free Ranging Group of Japanese Macaques (Macaca fuscata)
dc.typePresentation

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