摘要
本文用几种聚集度指标及Ｔａｙｌｏｒ的幂法、Ｉｗａｏ的ｍ一ｍ回归法分析松梢小卷蛾（ＲｈｙａｃｉｏｎｉａｐｉｎｉｃｏｌａｎａＤｏｕｂｅｌｄａｙ）幼虫的种群空间分布型为聚集分布，分布的基本成份为个体群，个体群中个体分布的平均拥挤度为６．１１９，个体群分布的相对聚集度随种群密度而变化的速率为一０．０１１，呈现出随种群密度的增加而降低的趋势。在资料代换中，以Ｉｗａｏ的方法最适合，文中还给出了松梢小卷蛾幼虫在不同虫口密度下的最适抽样数及序贯抽样方法。
The spatial distribution pattern of orange-spotted shoot moth(Rhyacioniapinicola Doubelday)larval was measured by means of several aggregation indexes. Resultshave shown that the spatial distribution pattern of the moth's larval obeys aggregation distri-bution. The basic components of the spatial pattern are colonies.The mean crowding for thedistribution of the number of individuals in per colony is 6.119.The rate at which the relativedegree of aggregation in the distribution of the colony change with the increas in populationdensity is一0.011. Based on the spatial pattern a suitable sampling transformation methodand a optimal sampling size are decided.The seqtieutial analysis is also applied.
关键词
松梢小卷蛾
空间分布
种群
orange-spotted shoot moth
spatial distribution pattern
