湖北神农架川金丝猴食物营养的季节性特征

摘要

探讨了川金丝猴（ Rhinopithecus roxellana）对食物选择与食物营养成分间的关系，分析了不同季节川金丝猴在营养摄取上的响应策略。在湖北神农架千家坪地区设置临时观测点，采集不同季节川金丝猴的食源植物，测定和分析其粗蛋白、粗脂肪、酸性洗涤纤维以及灰分质量分数。结果表明：川金丝猴的食源植物中粗蛋白的含量在春季最高，其后呈现下降趋势；粗纤维的含量比较稳定，在春、夏、秋3季变化幅度较小，仅在春季含量低于粗蛋白，在其他季节均高于其余几种营养成分。川金丝猴倾向于选择高蛋白质和低纤维素的植物作为食物。食源植物和食物的充分与否呈现季节性变化的规律，使得川金丝猴在营养摄入方面具有季节性特征。%We analyzed the macronutrient data collected separately in spring , summer and autumn over three years from leaves and fruits of plant species available as food for the snub-nosed monkey in Shennongjia National Nature Reserve , China.We measured the nutritional components including crude protein (CP), crude lipid (CL), acid detergent fiber (ADF), ash ( ASH) , and protein-to-fiber ratio ( PFR) .The food choice of Rhinopithecus roxellana across the year does fit the protein to fiber model, but had a seasonal shift in response to the change of diet macronutrients .The protein content in the diet food decreased from spring to autumn , but the fiber amount almost was a fixed level .Therefore, though fruits join in the diets of the monkeys in summer and autumn , there is still a tendency of the diet nutrients of higher PFR in spring than in summer and autumn.The food choice of R.roxellana is in response to the nutrient chemistry of a plant species in a certain season .