清凉峰环颈雉冬季觅食地选择

2007年1月18日至2月21日，对清凉峰国家级自然保护区内的环颈雉Phasianus colchicus觅食地选择进行了研冤。使用典型样线法寻找环颈雉的觅食地，根据调查地区情况，选择可能影响环颈雉对觅食地选择各种的变量，用主成分分析确定对环颈雉觅食地选择影响大的变量类型，然后用Independent-samples t和Mann-Whitnev U检验方法分析其选择性。在实地考察中，总共发现了14个觅食地。分析发现，环颈雉偏向于选择下坡位作为它们的觅食地，在所有觅食地中占64．29％，而中上坡位仅占总数的35．71％。由于食物资源的丰富度和隐蔽条件的综合作用，环颈雉偏爱灌木和草本物种丰富度高、草本密度和草本盖度较低的栖息地中觅食，特别喜欢密灌稀草（占50．00％）。

Winter feeding site selection of ring-necked pheasants in Mount Qingliangfeng

From 18 January to 21 February 2007, the feeding site selection of ring-necked pheasants （Phasianus colchicus） was surveyed in the National Nature Reserve of Mount Qingliangfeng in Zhejiang Province. Representative sampling method was used to find their feeding sites, and the variables affecting their feeding site selection were determined according to the condition of observed area. The principal com- ponent analysis was used to define the variables which were important for their feeding site selection, and then the independent-samples t and Mann-Whitney U were used to analyze the selectivity. A total of 14 feeding sites were found. The ring-necked pheasants prefer the under slope position as their feeding site （for 64.29% of all feeding sites）. Owing to the common effects of the food richness and concealment condition, the species select feeding sites with the higher richness of shrub and grass, the lower grass density and cover, and especially prefer the close shrub and sparse grass （50.00%）.