ホソヘリカメムシの個体群パラメータに及ぼす密度の影響

概要

論文の詳細を見る
The effect of the population density on the bionomics and demographic parameters of the bean bug, Riptortus clavatus THUNBERG was investigated. The insects were fed on dried soybean seeds and reared at different densities, 2,5,10,20 and 40 individuals in an incubator at 26℃ and under a 16L-8D photoperiod. The influence of the density on the developmental velocity was not significant. The developmental period of the immature stages was about 24.5 days in the most of plots with the density. The survival rate was markedly affected by the density. The daily number of eggs laid by a female was also affected by the density. The mean daily number of eggs at a density of 2 individuals was lower than that at a density of 5 or 10 individuals. The influence of the density on the weight differed between the sexes. Biotic performance of the males was considered to be affected more directly than that of the females under the crowded conditions. Net reproductive rate (R_0) and rate of increase (r) were also affected by the density. The maximum values of R_0 and r, i.e. 214.26 and 0.1206,were obtained at a density of 5 individuals. Significant correlations were observed for the relationship between the density and the maximum oviposition period, the maximum longevity of the females, the weight of the males, and for the relationship between the rate of increase and fecundity of the females.
日本応用動物昆虫学会の論文
1988-11-25