摘要
食物的营养物质是影响动物食物选择的生态因子。研究动物食物的营养组成及其对野生动物取食的影响对野生动物的保护具有重要的参考意义。为了研究喀斯特环境中食物粗蛋白对黑叶猴食物选择的影响,2006年1—12月在广西扶绥自然保护区,采用焦点动物取样法和连续记录法研究了片断化栖息地中黑叶猴的觅食行为,同时采集黑叶猴取食部位样本共40种190份,用凯氏定氮法测量其粗蛋白含量。结果表明,黑叶猴取食的食物包括嫩叶、成熟叶、花、果和种子等部位;食源植物的生活型包括了乔木、灌木、藤本和草本。食物的平均粗蛋白含量为12.7%,有明显的季节性变化。4月份样品的月平均粗蛋白含量全年最高,高达19.1%,而最低在6月份,仅为5.4%。食物的粗蛋白含量在前半年和后半年之间没有显著的差异(z=-1.28,P=0.20),在雨季和旱季之间亦无差异(z=-1.22,P=0.22);不同食源植物部位的平均粗蛋白含量不同,嫩叶的年平均粗蛋白含量最高,为13.7%,其次是成熟叶和花,分别是13.0%和12.1%,果实最低,仅为9.6%;不同生活型的食源植物粗蛋白含量不同,藤本的粗蛋白含量最高,为14.1%,草本的最低,仅为10.1%,乔木和灌木分别是11.3%。不同食源植物的取食时间与其粗蛋白含量没有显著的相关关系(P>0.05),粗蛋白含量不是影响黑叶猴取食的主要因素。
Various factors including nutrients impact the food selection of animals. The studies of food nutrient and its influence on animal＇s food selection have important implication to the ex-situ conservation of wildlife since we need to know how much nutrients they need for their survival and reproduction in captivity conditions. In order to determine the food crude protein content and the influence on food selection of animal in karst habitat, we studied the feeding behavioral of a group of Franqois＇ langur （Trachypithecus francoisi） in a severely fragmented habitat from January to December 2006 in Fusui County, Guangxi, China via focal animal sampling and continuous recording technique. In total 190 food samples belonging to 40 species were collected, the monthly food samples ranging from 9 in October to 25 in January and February. In January to March 2007 the crude protein content of the samples were determined by KDY-9830 Kjeldahl. The results showed that langurs used immature leaves through out the year, while mature leaves, flowers, fruits and seeds were seasonally used. The life forms of the foods included tree, shrub, liana and herbage. Herbage was seasonally used and the other food items fromother three life forms were used all the seasons. The total averaged food crude protein content was 12.7%, the monthly food crude protein content ranged from 19.1% in April to 5.4% in June. There was no significant difference between the crude protein content of the first half year and the second half year （ z = - 1.28, P = 0.20）, nor did rainy season and drought season（z=- 1.22, P = 0.22）. The crude protein content varied with food items, immature leaves had the highest crude protein content of 13.7%, followed by mature leaves and flowers, accounting for 13.0% and 12.1%, respectively. Fruits had the lowest crude protein content, only accounting for 9.6%. Among the crude protein content of life forms, lianas had the largest crude protein content of 14.1%, trees and shrubs had the second crude protein content of 11.3%, respectively, and herbage had the lowest crude protein content of 10.1%. The spearman correlation test showed that there were no significant correlationship between feeding duration of food items and their corresponding crude protein content （P〉0.05）. It suggested therefore that the crude protein content of food items was not the factor influencing the food selection of langurs in the habitat. Both physiological and behavioural factors may eating langur, which need further research. contribute to the crude protein requirement and intake in leaf-
出处
《生态学报》
CAS
CSCD
北大核心
2013年第23期7390-7398,共9页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(31060059)
珍稀濒危动植物生态与环境保护省部共建教育部重点实验室研究基金资助项目(1001Z16)
关键词
黑叶猴
粗蛋白
食物选择
影响因子
Trachypithecus francoisi
crude protein
food selection
impact factor
