Abstract # 13140 Poster # 62:

Scheduled for Thursday, August 9, 2018 06:00 PM-08:00 PM: (Chula Vista ) Poster Presentation


A. R. Lau1, A. Baxter2, M. Crofoot1 and K. Bales1
1University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA, 2Brigham Young University
     Monogamous pair-bonding occurs in only 3 to 9% of mammalian species. Previous work has demonstrated the importance of the neurotransmitter oxytocin in establishing and reinforcing pair-bonds. In non-human primates, pair-bonding is often coupled with vocal duetting. While these duets are largely territorial in nature, we analyzed a portion of the coppery titi monkey (Callicebus cupreus) duet that is likely important in pair-bond maintenance communication due to its high frequency and short propagation in forests. To test if variation in parameters of titi monkey duets relate to differences in individuals’ pair bonds intensity, we exposed juvenile titi monkeys to daily intranasal oxytocin (N=10) or saline (N=10) doses for six months to investigate whether or not chronic oxytocin exposure alters pair-bond behavior. Once paired with a mate, we collected subject’s morning duet recordings. A series of stepwise general linear mixed models indicate features of the titi monkey duet vocalizations vary by sex and treatment, such that oxytocin-treated females have higher frequency (p<0.001) and higher bandwidth (p<0.5), vocalizations than saline treated females, and females have higher frequency vocalizations than males (p<0.001). As these features are energetically costly, this suggests exposure to oxytocin during development cause differences in pair-bond communication as reflected in the highest frequency and bandwidth of intra-pair communication notes in the titi monkey duet, possibly mediated by the pair-bond-specific behavioral differences between oxytocin- and saline-treated individuals.