モンシロチョウ蛹の体重減少について

In this experment, the relation between the change of body weight in the pupal stage of the common cabbage butterfly, Pieris rapae Cruciuora BOISDUVAL and the temperature and humidity were investigated. The results are summarized as follows.
1. The duration of pupa was 12～13days on the open field in May, in Shimane Prefecture, and 10～11 days at 20℃ of artificial temperature 6～7days at 25℃, and 5～6days at 30℃, humidity having no influence on it.
2. The body weight after the duration of pupa, diminished by 12% of the original body weight in the open field. The highest diminution in artificial temperature was seen to be 13% at 30℃ in 43% humidity and the lowest 3% at 20℃ in 100% humidity.
3. The diminution Curve is U-shaped in the open field, but the shape under went a certain modification in higher temperature.