Regular ArticleFeeding competition among female olive baboons, Papio anubis
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Does the social network structure of wild animal populations differ from that of animals in captivity?
2021, Behavioural ProcessesContest competition for fruit and space among wild chimpanzees in relation to the vertical stratification of metabolizable energy
2021, Animal BehaviourCitation Excerpt :At that point, aggression increased again but feeding depth and energy intake rates kept decreasing until individuals left the tree. Distance among co-feeding competitors increased with time, likely to reduce scramble competition by increasing group spread, similar to what has been found in various other mammals (Barton & Whiten, 1993; Grueter, Li, Ren, Wei, & van Schaik, 2009; Pazol & Cords, 2005; Saj & Sicotte, 2007). Our study was limited by the number of fruit tree species (N = 23) and individual trees (N = 279) that produced fruit during our field work.
Energetics at the urban edge: Environmental and individual predictors of urinary C-peptide levels in wild chacma baboons (Papio ursinus)
2020, Hormones and BehaviorCitation Excerpt :Predicting dominance rank effects is not straightforward because such effects appear to become prominent mainly during periods of high competition and/or increased energy expenditure (Sherry and Ellison, 2007; Emery Thompson et al., 2009; Higham et al., 2011a). However, because high-ranking baboons may have better access to food resources and/or higher energy intake (e.g. Post, 1980; Barton, 1993; Barton and Whiten, 1993; Kaplan et al., 2011), we expect higher uCP in high-ranked individuals. We expect (hormonally confirmed) female reproductive state (cyclic, pregnant, lactating) to influence uCP and predict higher uCP in pregnant females (e.g. Nurmi et al., 2018) and lower uCP in lactating females, compared to cyclic females (e.g. Emery Thompson et al., 2012).
Female macaques compete for ‘power’ and ‘commitment’ in their male partners
2020, Evolution and Human BehaviorCitation Excerpt :A competitive situation was defined as two or more females sharing the same male as top partner. As competition is mediated by dominance hierarchy, with the higher ranking individual having priority in gaining access to resources (Altmann, 1962)Barton, 1993; Barton & Whiten, 1993; van Noordwijk & van Schaik, 1987), we expected that the higher ranking a female, the stronger the affiliative relationship with a male would be compared to other females competing over the same male. Hence, we ordered females within a competitive situation by 1) the strength of their relationship with the male from the male's perspective and 2) their dominance rank.