個体群密度と分布の集中度 : 特に負の二項分布における共通のkと関連して

概要

論文の詳細を見る
In most insect populations, the pattern of their spatial distributions conforms to the negative binomial series. In some of these cases the degree of aggregation represented in terms of exponent k is stable, while in others it decreases with the increase of the density. The theoretical relation between the value of k and the population density was examined and discussed with regard to the four processes leading to the negative binomial distribution : true contagion, heterogeneity in the probability of occurrence, compounding of POISSON and logarithmic distributions, and immigration-birth-death process. In the first two processes a common k may be obtained within a certain range of density, but in the third process k changes proportionately with the density. In the last process k is stable if the rates of immigration and birth change at the same ratio as the density increases.
日本生態学会の論文
1968-06-01