Abstract
The red-handed howler monkey (Alouatta belzebul) is one of 116 imperiled Brazilian primate species. We aimed to determine the serum biochemical profile of free-ranging red-handed howler monkeys in a highly disturbed area of the eastern Amazon. We obtained serum samples from 26monkeys, in which we analyzed 20 biochemical variables. Calcium concentration was significantly lower in adult males (1.82±0.25mmol/L) than in adult females (2.10±0.50mmol/L). Both adults (males=89±85UI/L, females=62±23UI/L) had lower alkaline phosphatase serum activity than juvenile females (178±120UI/L). Adult male had higher levels of the direct bilirubin (13.9±8.2µmol/L) and creatinine (74.3±19.4µmol/L) than juvenile females (5.1±1.4µmol/L and 38.9±15.0µmol/L, respectively). This detailed biochemical profile may be useful for the management of red-handed howler monkeys in the wild and to support further studies at ex situ facilities.
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