Abstract # 151:

Scheduled for Sunday, September 20, 2009 06:30 PM-09:00 PM: Session 14 (Mission Bay Ballroom CDE) Poster Presentation


N. Klepper-Kilgore
Mount Ida College, 777 Dedham Street, Newton, Massachusetts 02459, USA

Indices of linear proportions from birth to age 6 years were calculated for a mixed longitudinal sample of laboratory-reared Macaca fascicularis. Because this species is arboreal, it was expected that greater hindlimb/forelimb ratios would be present early in postnatal life. Subjects were 56 females and 55 males at New England Primate Research Center. Measurements included sitting height, thigh length, leg length, knee height, foot length, arm length, forearm length, and hand length. Mean indices were calculated separately for males and females at 90-day intervals. Same-aged sample size ranges from 4 to 37 males and 7 to 27 females. Sex differences in linear dimensions were low until year 3, when male means exceed female means. T-tests of mean sitting height and thigh length in 4 males and 9 females measured at 1890 days were significant [sitting height t=2.90, p<0.01; thigh length t=2.28, p<0.05]. Indices calculated included total leg length/sitting height, total upper limb/sitting height, humerofemoral index, brachial index, crural index, intermembral index, and thigh length/foot length. Within sex t-tests of indices at 0, 180, 450, 720, 1080, 1350, and 1530 days showed no significant changes during growth. Between-sex index differences of same-aged groups also were not significant. Mean index values are consistent with arboreal quadrupedalism: humeral length about 82 percent of thigh length, and forelimb length about 80 percent of hindlimb length