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Macaca thibetana at Mt. Emei, China: III. Group composition
Author(s) -
Zhao Qikun,
Deng Ziyun
Publication year - 1988
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.1350160308
Subject(s) - biology , sex ratio , population , adult male , male to female , zoology , demography , medicine , epidemiology , endocrinology , sociology
Data on group composition at the end of the 1986 birth season were collected from six groups of Macaca thibetana . All adult males, the members of group A, and some conspicuous animals were recognized individually. Fourhundred survey sessions were completed. The mean group size was 38.3 (SD = 13.8, range: 28–65); the number of adult females was the best correlate of total group size. The mean adult sex ratio (F:M) across groups was 3:1 (SD = 1.9, range: 1.5–6.5:1), which significantly deviated from 1:1. Sex ratios (F:M) in newborns, juveniles, and all members did not significantly deviate from 1. The ratio of immature animals to adults was 1.5 to 1 (average of groups); that is, 60% of the population was composed of immature animals, and the population was growing.