Animal Management, Yokohama Zoological Gardens, Yokohama, Japan.
Department of Animal Science and Resources, Nihon University, Fujisawa, Japan.
Anim Sci J. 2021 Jan-Dec;92(1):e13612. doi: 10.1111/asj.13612.
One male and three female captive proboscis monkeys (Nasalis larvatus) were used as test animals to compare fecal nutrients after being fed seasonal foliage. Foliage and fecal samples were collected during three seasons (spring, summer, and winter). We analyzed crude ash (CA), ether extract (EE), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid detergent lignin (ADL). In addition to the above components, for the fecal samples, we examined total fecal nitrogen (TFN), nitrogen in fecal NDF (NDF-N), metabolic fecal nitrogen (MFN), and particle size distribution (MPS). Seasonal differences in foliage components were observed, with NDF and ADF being lowest in spring (p < 0.05). Fecal NDF and ADF also tended to be lowest in spring. Further, the distribution of fecal particle size indicated that MPS tended to increase in winter. The mean fecal NDF content (47.4%) for all three seasons measured in this study was as much as 1.3 times lower than previously reported values in free-ranging specimens. These data provide useful information that can be used to find some suitable food items for the endangered highly folivorous monkeys in captivity.
本研究以 1 雄 3 雌圈养的长鼻猴为实验动物，比较其摄食季节性植物后的粪便养分。于春、夏、冬三季采集植物及粪便样本。分析粗灰分（CA）、乙醚浸出物（EE）、粗蛋白（CP）、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）、酸性洗涤木质素（ADL）。除上述成分外，粪便样本还检测总粪便氮（TFN）、粪便 NDF 中的氮（NDF-N）、代谢粪便氮（MFN）及颗粒大小分布（MPS）。观察到植物成分具有季节性差异，其中春季 NDF 和 ADF 含量最低（p < 0.05）。粪便 NDF 和 ADF 也倾向于春季最低。此外，粪便颗粒大小的分布表明冬季 MPS 有增加的趋势。本研究中所有三个季节的粪便 NDF 含量平均值（47.4%）比之前自由放养标本的报告值低 1.3 倍。这些数据为圈养的濒危高度食叶猴寻找合适的食物提供了有用的信息。
