Abstract # 115:

Scheduled for Friday, August 19, 2005 11:30 AM-11:45 AM: Session 8 (Mayfair Room) Oral Presentation

Seasonal Reproduction in Captive Owl Monkeys

C. Wolovich1,2, G. Holbrook1, C. Chambers1, R. Cooper1 and S. Evans1,2
1DuMond Conservancy, 14805 SW 216th St., Miami, FL 33170, USA, 2Dept.of Biol., Univ. of Miami
     Owl monkeys (Aotus spp.) are the only nocturnal simians and are also important in medical research. Although these monkeys are still imported from Peru, there has been a recent emphasis placed on captive breeding by the USA. The DuMond Conservancy in Miami, FL, USA, has maintained a colony of owl monkeys in an outdoor, subtropical environment for over 17 years at the same location. A total of over 100 infants have been born to 32 different females during this period, with births occurring in all months of the year. There have been fewer births during the months of December, January, and February (χ2 = 9.62, df = 3, P = 0.022), and those females that did give birth during these months were typically primiparous. As female parity increased, births became more seasonal. In 2004, fourteen male and female pairs were observed regularly each month to monitor sexual activity. Mating was observed frequently (.32 matings/hour) throughout the year, but was not uniformly distributed across months and peaked in April (One-sample Kolmogorov-Smirnov Test, P = 0.034). All of the nine births in 2004 occurred during the warmest/wettest half of the year (May through October). Wild owl monkeys in Argentina exhibit an even stronger pattern of birth seasonality, although shifted to later in the year due to their location in the southern hemisphere.