Abstract # 27:

Scheduled for Thursday, June 19, 2008 05:00 PM-07:00 PM: Session 4 (Ball Rooms A and B) Poster Presentation

Reproduction in an Owl Monkey Breeding Colony (Aotus sp.)

S. V. Gibson1, G. W. Tustin1, L. E. Williams2, A. M. Schuler1, A. G. Brady1 and C. R. Abee2
1University of South Alabama, Department of Comparative Medicine, Mobile, AL 36688, USA, 2Department of Veterinary Sciences, Michale E. Keeling Center for Comparative Medicine and Research, Bastrop, TX
     A colony of owl monkeys of unknown karyotype (Aotus sp.) was acquired by the University of South Alabama in the fall 2001. From 2002-4, karyotypes were determined for adults and any offspring for which a parent was not available. Karyotyping revealed that the colony was composed of 71.3% Aotus nancymaae, 10.9 % A. vociferans, 7.6 % A. azarae, and 10.2% hybrids. Mismatched pairs were separated and paired when possible with the correct karyotype. Hybrids were housed as same sex pairs or as singles. Colony-born monkeys were paired after assisting in raising a sibling or at 12 months of age. From 2002-7, there were 365 births, including 3 sets of twins. Live births were 80.8% of all births and 89.9% of live births (72.6% of total births) survived past 30 days. The average number of male/female pairs was 81 (range 65 - 100), of which 71.5% were productive. Eighteen percent of productive pairs had 2 births in the same year. Births occurred throughout the year with peak numbers in March (14.4%) and April (12.2%), and fewest in July (3.8%). Sex was known for 323 infants; 145 were male (44.9%) and 178 were female [55.1%, paired t test, a=0.05]. In A. vociferans, this pattern was reversed with 62.9% male and 36.1% female offspring. As previously reported for Aotus, hybrids were viable and fertile.