Sixty-four male and 33 female free-ranging rhesus monkeys (Macaca mulatta) from one of six social groups on the island of Cayo Santiago, Puerto Rico, were surveyed to establish normal values for the hemogram and serum biochemical and electrolytes for the colony. Mean values (± 1 SD) are reported by sex for each of three age groups (2-3, 4-9 and ≥ 10 years). All adult females (≥ 4 years) were pregnant. There were significant differences for a number of variables compared to the range reported in the existing literature, and among the age and sex groups in the sampled population.
Keywords: Cayo Santiago; Macaca mulatta; blood values; free‐ranging rhesus macaques; pregnancy.
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