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Growth curves, dental emergence norms, and supplementary morphological observations in known‐age captive orangutans
Author(s) -
Fooden Jack,
Izor Robert J.
Publication year - 1983
Publication title -
american journal of primatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.988
H-Index - 81
eISSN - 1098-2345
pISSN - 0275-2565
DOI - 10.1002/ajp.1350050402
Subject(s) - biology , captivity , cheek teeth , body weight , demography , zoology , anatomy , endocrinology , sociology
Postnatal development in known‐age captive orangutans was studied by collating new data from seven orangutans at Chicago Zoological Park, Brookfield, Illinois, with published and unpublished data from 76 additional captive orangutans. Norms were tabulated for deciduous and permanent dental emergence. Growth curves for weight and linear dimensions in females and males were compared in captive‐reared and wild‐reared subjects. Hand‐reared and mother‐nursed captives were compared with respect to dental emergence and weight increase. Differential relative growth of extremity segments was investigated. Pedigree data are presented relative to genetics of hallucal nail absence. Males of various ages were compared with respect to testis size and location and cheek‐pad development.