Zhang Feng, Chen Zhijie, Zhang Shulian, Zhao Huiyan
College of Plant Protection, Northwest China Sci-Tech University of Agriculture and Forestry, Yangling 712100, China.
Ying Yong Sheng Tai Xue Bao. 2006 Mar;17(3):477-82.
In this paper, the spatial distribution pattern of Pontania dolichura larvae was analyzed with Taylor's power law, Iwao's distribution function, and six aggregation indexes. The results showed that the spatial distribution pattern of P. dolichura larvae was of aggregated, and the basic component of the distribution was individual colony, with the aggregation intensity increased with density. On branches, the aggregation was caused by the adult behavior of laying eggs and the spatial position of leaves, while on leaves, the aggregation was caused by the spatial position of news leaves in spring when m < 2.37, and by the spatial position of news leaves in spring and the behavior of eclosion and laying eggs when m > 2.37. By using the parameters alpha and beta in Iwao's m * -m regression equation, the optimal and sequential sampling numbers were determined.
本文运用泰勒幂法则、岩田分布函数和6种聚集度指标，对栗瘿蜂幼虫的空间分布格局进行了分析。结果表明，栗瘿蜂幼虫的空间分布格局为聚集分布，分布的基本成分是个体群，聚集强度随密度的增加而增大。在枝条上，聚集是由成虫产卵行为和叶片空间位置引起的；而在叶片上，当m＜2.37时，聚集是由春季新叶的空间位置引起的，当m＞2.37时，聚集是由春季新叶的空间位置以及羽化和产卵行为引起的。利用岩田m*-m回归方程中的参数α和β，确定了最适抽样数和序贯抽样数。
