アズキゾウムシ成虫にみられた生態的2型

抄録

In the azuki bean weevil, Callosobruchus chinensis collected from the field, the activity measured by photo-stimulated flying changed with the adult age in days. The mode of this change differed by the density of the larval stage (Fig. 9). Numbers of adults which flew to a light source, and which did not fly were counted every minute for 5 minutes. Flight-responsiveness to a light source differed by the larval density (Fig. 8). The active and sluggish types were in this way discriminated. But the intermediate individuals, that is the less active ones were found out. They did not fly to a light source, but walked about or stood still outside the dish. The number of eggs deposited by an active female was rather less than that by sluggish ones (Fig. 2). Little differences in the emergence date of these two types can be observed (Fig.3). Though the mechanism of the emergence of both types has still remained unsolved, it seems that temperature, larval density in a bean, and parent activity are in some way related to the activity of the female weevil. The results for male were rather obscure (Fig. 4,5,7,8). In both female and male, mating has no effect on the mode of the activity change (Fig. 6).