Abstract # 4578 Poster # 86:

Scheduled for Thursday, June 20, 2013 07:00 PM-09:00 PM: Session 9 (SG Foyer ABC) Poster Presentation


PACE OF DEVELOPMENTAL MARKERS IN CAPTIVE MACACA MULATTA.

A. R. Eller, S. Buckley, T. Edwards, S. R. Frost and F. J. White
University of Oregon, Department of Anthropology, 308 Condon Hall, 1321 Kincaid St, Eugene, Oregon 97402, USA
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     Data on the pace and timing of developmental markers in non-human primates are rare. The timing of developmental markers can elucidate ecological relationships in ways that growth sequences alone cannot. This study reports new data on the pace of dental eruption, epiphyseal union, and long bone growth in two populations of Rhesus macaques. 114 M. mulatta individuals of known age (fetal to adult) from two captive populations are included. Teeth were scored from “0” (unerupted) to “4” (full occlusion) for each tooth, deciduous and permanent, and epiphyses scored from “0” (no fusion) to “2” (completely fused), for 33 epiphyses including all major long bones, the pelvis, and metapodials. All long bones were measured for maximum length and width. There were significant positive regressions of both fusion (F=292.19; df 1,47; p <0.001) and eruption (F=291.49; df 1,73; p<0.001). The two measures of development were also highly correlated (Spearman r = 0.745, p<.001), and preliminary analyses indicate that long bone length is likewise correlated. Spearman rank correlation between the residuals from separate dental and epiphyseal regressions yielded no significant correlation (r=-0.137, p=0.413), suggesting deviations from the predicted individual developmental stage were not caused by a single common factor. Further, because we include younger populations than previous studies, and use graded (non-dichotomous) scales, we are able to contribute new data on the pace of development within Macaca mulatta.