摘要
本文在系统研究种群聚集度指标与分布型判断准则的基础上,提出了一个新的种群聚集度指标:L'=V/m+V。指标L'不仅可用于判断昆虫种群的空间分布型,而且L'与方差(V)之间存在着显著的线性关系。据此,提出了检验种群空间分布型的L'-V模型:L'=a+bv。当模型相关显著时,参数a、b的不同组合型式就揭示了种群不同的空间分布型的信息。根据L'-V模型,推导了序贯抽样方程和最大抽样数量的确定公式,以及最适抽样单位大小的确定公式。
On the basis of the character that varivance (V) is equal to mean (m) in Poisson distribution, a new aggregation index is presented in this paper, i. e L' index (L' = V/ m+V). The index L' can be used for testing insects population spatial patterm and also the relationship between L' and V is usually linear, according to the property of L' and V, the linear regression formula is presented by author, that is L'- V model (L' = a+bV). When the L'-V is linear, the estimated parameters values of a and b can offer different information concerning the spatial pattern of insect population. On the basis of the L'-V model, the author developed a set of math formula for insects population sampling technique.
基金
贵州省科学基金资助项目
关键词
昆虫种群
空间分布型
L'-V模型
L'-V model, Insect population, Spatial pattern, Sampling technique
