鹮嘴鹬越冬觅食地选择与食物资源调查  

Winter Feeding Site Selection and Food Resource of Ibisbill in Western Sichuan Province,China

作　　者：叶元兴[1] 王楠[2] 丁长青[1] 

机构地区：[1]北京林业大学生物科学与技术学院,北京100083 [2]北京林业大学自然保护区学院,北京100083

出　　处：《动物学杂志》2012年第2期46-51,共6页Chinese Journal of Zoology

基　　金：国家自然科学基金项目(No.30800101)

摘　　要：2010年1～3月在四川省稻城地区对有鹮嘴鹬(Ibidorhyncha struthersii)觅食的河段进行调查,发现鹮嘴鹬87只,密度为1.24只/km,集群平均个体数为(2.12±0.89)只/群。采用样方法调查其觅食地的生境特征,调查其觅食地样方41个,对照样方54个。逐步判别分析结果表明,影响鹮嘴鹬冬季觅食地选择的关键因子是:直径大于30 cm石头盖度、河心岛面积、干扰距离、水深、河滩的宽度。其觅食频率为(18.39±2.36)次/min(n=50),觅食成功率为29.39%±13.24%(n=50)。样方调查(n=50)发现9种食物资源,鹮嘴鹬觅食河段中石蛾(Trichoptera)幼虫(37.72%±12.96%)、石蝇(Plecoptera)幼虫(36.36%±6.06%)和甲壳类(17.76%±7.74%)比例较高,共占样方内食物数量91.84%。Feeding site selection of the Ibisbill （lbidorhyncha struthersii） was investigated at Daocheng in western Sichuan Province of China from January to March 2010. 87 birds were observed; density of birds is 1.24 per kin,the average group size is 2.12 ± 0.89.41 used sites and 74 controlled sites were recorded （altitude from 3 715 to 4 200 m）. By stepwise discriminant analysis ,the key factors relating to feeding site selection of the Ibisbill were stone cover with diameter more than 30 cm,acreage of island,interfering distance, river width and the width of bank. Observations on both foraging and ingestion indicated that the foraging frequency is 18.39±2.36 （n =50） and ingestion success rate is 29.39% ± 13.24% （n = 50）. 9 kinds of food resource were examined, and sampling method suggested that Ibisbill preyed mainly on caddisfly larvae （Trichoptera） （ 37.72% ± 12.96% ） , stonefly larvae （Plecoptera） （ 36. 36% ± 6.06% ） and crustaceans （ 17.76% ± 7.74% ）.

关 键 词：鹮嘴鹬 四川稻城 觅食地 食性 

分 类 号：Q958[生物学—动物学]