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The Roles of Oxytocin and Vasopressin in Modulating Caregiver Responses to Juvenile Marmoset Monkeys

Background and Description of Project. The expression of parental care is very important in humans, marmoset monkeys, and biparental rodents. Biparental care (care given by both parents) contributes to more surviving offspring, because parental care is split between the mother and father (Gordon, Zagoory-Sharon, Leckman, & Feldman, 2010; Storey and Ziegler, 2015). Like humans, marmoset monkeys participate in monogamous pair bonds where both parents and siblings (alloparents) provide care for infants (Nunes, Fite, Patera, & French, 2001). A very important neuropeptide called oxytocin (OT) plays a part in parent-offspring interactions among humans, marmosets, and rodents alike. OT increases social behavior. (Bales and Saltzman, 2015; Gordon, Zagoory-Sharon, Leckman, & Feldman, 2010). Many studies have described the effects of OT on parental behavior in the neonatal care period, but fewer have studied parental care behavior that extends into adolescence. My study will investigate the extended parental care behavior of food sharing, and how it is affected by oxytocin and its sister peptide, arginine-vasopressin (AVP).