アズキゾウムシのダイズでの増殖率の変化

概要

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The azuki bean weevil which had been reared continuously under constant laboratory conditions for many years using the azuki bean, Phaseolus angularis Wight, for food, was removed to the soy bean, Glycine Max Merrill, The growth form of the weevil population was investigated in the soy beans by counting the adult weevil every week. It was found that the growth of the third generation was greater than that of normal cases (Fig. 1). The reason was analysed experimentally. The results of experiments were analysed concerning with the change of sex ratio, developmental period, mortality, and fecundity with successive generations. The sex ratio and the developmental period did not vary regularly with the progress of generation (Figs. 2,3), but the fecundity increased remarkably (Fig. 4) and the mortality decreased slowly with the advance of generation (Fig. 5). Therefore the rate of increase as represented by the number of progenies per female increased with generations (Fig. 6). It became clear that the reason why the population growth form of the azuki bean weevil removed from azuki beans to soy beans did not show a normal form was partially the increase of reproductivity with generations. In discussion, it was considered that the selection was insufficient to interpret these results.
日本生態学会の論文
1958-12-30