Abstract # 13336 Poster # 109:

Scheduled for Thursday, August 22, 2019 06:00 PM-08:00 PM: (Alumni Lounge) Poster Presentation


N. J. Dukes1,2
1Wisconsin National Primate Research Center, 1220 Capitol Ct, Madison , WI 53703, USA, 2University of Wisconsin-Madison
     To further understand the motivation and facilitation of paternal involvement in the common marmoset, Callithrix jacchus, we tested fourteen marmoset fathers to control vocalizations and generic infant distress cry sounds for their responsiveness, and compared their hormone levels with their responsiveness scores. Fathers were removed from their family while their infants were less than a month old and placed in a solitary cage connected to the stimulus cage. Entering the stimulus cage was required to investigate the infant distress cries. More than twice as many fathers were responsive to infant distress cries in comparison to nonresponsive fathers for examining the stimulus source, entering the stimulus cage, and investigating the stimulus source. Using multi-steroid liquid chromatography and mass spectrometry, LC/MS to analyze blood hormone levels, highly responsive fathers showed a significantly greater percent change between control and distress cries (t=0.84 and p=0.0286, paired t-test) in testosterone and other androgens compared to fathers that were responsive at a lower rate. This finding supports previously new findings that altered hormone ratios acquired during pregnancy/after birth of an offspring shift behavior in marmoset fathers. Additionally, no significant difference in cortisol were found between the control or the distress cry, indicating fathers did not undergo a stress response (p=0.43). This research pertains to the importance of understanding both behavioral and physiological reasons behind strong paternal involvement in biparental systems.