Abstract # 220:

Scheduled for Monday, August 28, 2017 02:15 PM-02:30 PM: (National Ballroom Salon A) Oral Presentation


M. L. Power1 and W. P. Dittus2
1Smithsonian Conservation Biology Institute, Conservation Ecology Center, National Zoological Park, Washington, DC, USA, 2National Institute of Fundamental Studies, Sri Lanka
     The vitamin D receptor is found on most cells, implying that vitamin D has important biological functions beyond calcium metabolism and bone health. Although captive primates should be given a dietary source of vitamin D, under free-living conditions vitamin D is not a required nutrient, but rather is produced in skin when exposed to UV-B light. Levels of circulating 25-OH-D sufficient for good health for macaques and other Old World anthropoids are assumed to be the same as human values, but data from free-living animals are scant. This study reports values for 25-OH-D and the active vitamin D metabolite, 1,25-dihydroxyvitamin D (1,25[OH]2 D) for wild toque macaques (Macaca sinica) in Sri Lanka. Plasma samples were obtained from 8 adult males, 7 juvenile males, 6 young nulliparous females, 9 adult females not pregnant or lactating, 11 lactating adult females, and 4 pregnant females. Mean values for the complete sample were 61.3±4.0 ng/ml for 25-OH-D and 155.6±8.7 pg/ml for 1,25[OH]2 D. There were no significant differences for either metabolite among age and sex classes, nor between lactating and nonreproductive females. Values from the literature for circulating 25-OH-D in captive macaques are three times higher than those found in this wild population, however, 1,25[OH]2 D values in captive animals were similar to the wild values. Current vitamin D supplementation of captive macaques likely exceeds requirement.