増殖に対する密度効果と成虫の寿命

概要

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It is well known that the density of a progeny population is determined by the density of the parent population and the so-called reproduction curve which represents the quantitative relation between these two successive populations has two classical types, as shown in Fig. 1. One is the saturation curve which has been experimentally obtained in the Tribolium population (CHAPMAN, 1928), and another is a mountain shaped curve obtained in the experimental population of Collosobruchus chinensis (UTIDA, 1941). Further, it has been theoretically assumed that these tww types and the intermediate one between them will appear when the duration of adult life is controlled(FUJITA & UTIDA, 1952,Ecol. 34,488). This assumption is now experimentally proved in the population of Calandra oryzae, changing the duration of adult life, such as 5,10,15,20 and 25 days, by taking the beetles from the culture populations at those dates. The results obtained are given in Fig. 2. It seems most probable that the change of the reproduction curve is produced not only by the adult duration but also by the different nature of the mechanism governing the density effect itself.
日本生態学会の論文
1956-03-31