1Anthropology, Washington University in St. Louis, 2Kasanka Baboon Project, 3Anthropology, New York University
March 26, 2015 , Archview Ballroom
This study reports on paternity results and male-female relationships in Kinda baboons. Data was collected over a period of 36 months in Kasanka National Park, Zambia. From previous results it has been shown that Kinda males spent more time grooming and in social proximity to females than do other baboon taxa.
We analyzed 1944 10 minute focal samples to determine male-female and male-offspring relationships We found that among all adult grooming, female-female grooming made up 40.5%, intersexual grooming accounted for 56.3%, and male-male grooming made up the remaining 3.2%. Examining the 56.3% of intersexual grooming, males groomed females 35.9% and females groomed males 20.4%.
The top 4-5 ranking males groomed and stayed in social proximity to the same females over the entire study period. Interestingly, although there is a male linear dominance hierarchy, males of higher rank were not seen to monopolize reproductively receptive females that already had an established friendship with another male, regardless of rank.
Probable paternity was assumed from behavioral observations of male-female grooming and proximity. To confirm paternity we collected fecal samples for genetic analysis. We used 11 microsatellite loci to estimate paternity in father-infant/juvenile pairs. Contrary to expectation, not all males that groomed frequently with specific females fathered offspring with them during the study period. Further analysis will allow us to understand the general pattern of paternity and friendship in this group of baboons as well as gain a better understanding of the evolution of intersexual relationships in primates.