Abstract # 169:

Scheduled for Friday, June 21, 2013 07:00 PM-09:00 PM: Session 21 (SG Foyer ABC) Poster Presentation


G. Agoramoorthy1, J. F. Lin2 and M. J. Hsu2
1College of Pharmacy & Health Care, Tajen University, Yanpu, Pingtung 907, Taiwan, 2National Sun Yat-sen University, Kaohsiung, Taiwan
     This study presents long-term life-history data on Formosan macaques (Macaca cyclopis) of Mt. Longevity, Taiwan. Between 1996 and 2000, 613 births occurred and the infants were monitored till December 2012. The frequency of infant births peaked from April to June (93.8%). Sex ratio of infants at birth was 1:1.2 (female to male) and one third (33.1%) of them died within a year. The majority (67.8%) of infant death occurred within a month without any gender difference (p>0.05). The adult male mortality (6> years) was higher than adult female (p<0.05) and only 7% of males and 38% females continued to survive till December 2012. Females (57.6%) delivered their first infant at four years of age. The inter-birth interval in cases where infants died within 3-months of birth was 0.96 years (± 0.07, n = 23), which was shorter than cases where infants were reared successfully (1.02 years ± 0.09, n = 185, p<0.05). Variables such as maternal ranks, age, infant sex ratio and troop size had no impact on inter-birth intervals (p >0.05). The birth rates of high/middle-ranking females (66.3% and 68.0%) were higher than low-ranking females (45.6%, p<0.05). Maternal rank and age had no effect on the male infant ratio (p>0.05). The long-term life-history traits data presented are crucial for the understanding of primate evolution, ecology, social behavior, and reproductive strategies.