[dataset] Behavioral expression of father-daughter bonds affects sociality and responsiveness to oxytocin and vasopressin treatments in captive juvenile female titi monkeys (Plecturocebus cupreus)

[dataset] Social bonds influence physiology and behavior, which can shape how individuals respond to physical and affective challenges. Coppery titi monkey (<em>Plecturocebus cupreus</em>) offspring form selective bonds with their fathers, making them ideal for investigating how father-daughter bonds influence juveniles’ responses to oxytocin (OT) and vasopressin (AVP) manipulations. We quantified expression of father-daughter bond-related behaviors in females (n = 10) and gave acute intranasal treatments of saline, low/medium/high OT, low/high AVP, or OT receptor antagonist (OTA) to subjects prior to a parent preference test. While females spent more time in proximity to their parents than strangers, we found a large degree of individual variation. Females with greater expression of bonding behaviors responded to OT treatments in a dose-dependent manner. Subjects also spent less time in proximity to strangers when treated with High OT (p = 0.003) and Low OT (p = 0.007), but more time when treated with High AVP (p = 0.007), Low AVP (p = 0.009), and OTA (p = 0.001). Findings from the present study suggest variation in expression of bond-related behaviors may alter responsiveness to OT and AVP, increasing engagement with unfamiliar social others. This enhanced sociality with strangers may promote formation of pair bonds with partners.