虫草蝠蛾幼虫空间分布型的研究

STUDIES ON THE PATTERN OF SPATIAL DISTRIBUTION OF THE GHOST MOTHS’ LARVAE

一、前言空间分布型的研究是现代理论生态学的重要基础工作之一,它在实际应用上亦具重要意义。它不仅可揭示出种群的空间结构特征,而且还是确定抽样技术、资料代换和正确估计种群数量的基础。 目前,国内外有关昆虫空间分布型的研究多限于农林业害虫,对其它昆虫的空间分布研究甚少。虫草蝠蛾是我国名贵中药材冬虫夏草的寄主昆虫,主要分布在青海、西藏、四川、云南四省境内的高山草甸。

In the present paper, the routine studing method of insect soatial distribution and many indices of aggregation were reviewed and compared with their application in the study of the spatial patterns of the larvae of the ghost moths, which are the host insects of Chinese insect herb, the famous and precious Chinese medicine or traditional drug, distributed on the snow mountain in Yunnan province. It shows that all sets of the samples fit the negative binomial distribution. All indices indicate that the distribution of the larvae are of an aggregated pattern. Iwao’s method shows that the larvae occur as colonies and the distribution of the colonies is aggregated.