Yin Lijie, Liu Wei, Zhao Qing, Qin Dagong, Li Xingdong, Wang Dezhi, Jin Tong, Chen Mei, Pan Wenshi
Centre for Nature and Society, School of Life Sciences, Peking University, Beijing, China.
Folia Primatol (Basel). 2011;82(1):33-44. doi: 10.1159/000326798. Epub 2011 Apr 15.
Asian leaf-eating monkeys have flexible, environmentally adaptable feeding strategies. The diet and food choices of white-headed langurs (Trachypithecus leucocephalus) have, however, not yet been studied in the Nongguan Karst Hills in China, where one of the two main surviving populations of this endangered species lives. From 2000 to 2002 inclusive, we adopted an innovative video playback analysis method to identify the food species used by the langurs and to calculate the corresponding feeding frequency for each species. The video-aided methodology was shown to be efficient. It provided high-quality images, and the plant species could be identified in 98.3% of the feeding records. Based on this analysis, we found that the langurs in Nongguan fed on 70 species of plants, among which 24 were identified as their staple food species. The cumulative curve for the staple food species reached a plateau at 255 (43.7%) feeding records. This result indicated that most of the langurs' staple food species had been identified by the analysis.
亚洲食叶猴具有灵活且能适应环境的觅食策略。然而，在中国弄关喀斯特山区，白头叶猴（Trachypithecus leucocephalus）的饮食和食物选择尚未得到研究，而该濒危物种现存的两个主要种群之一就生活在那里。在2000年至2002年（含）期间，我们采用了一种创新的视频回放分析方法来确定叶猴所食用的食物种类，并计算每种食物的相应取食频率。结果表明，视频辅助方法是有效的。它提供了高质量的图像，在98.3%的取食记录中能够识别出植物种类。基于此分析，我们发现弄关的叶猴以70种植物为食，其中24种被确定为它们的主食种类。主食种类的累积曲线在255次（43.7%）取食记录时达到平稳状态。这一结果表明，分析已识别出了大多数叶猴的主食种类。
