サカハチチョウの季節型決定について

概要

論文の詳細を見る
In the nymphalid butterfly, Araschnia burejana, there are two seasonal forms; viz., the spring form, produced from diapause pupae, and the summer form, produced from nondiapuse pupae. Presence or absence of six yellow or reddish yellow spots on the upperside of the left fore-wing were used as the criteria to distinguish between the seasonal forms. Pupal diapause is determined by day-length and temperature during the larval period in A. burejana; a short day-length at low temperture induces the diapause whereas a long day-length at high temperature induces non-diapause pupae. In either case, temperature during the pupal period has no appreciable effect on the determination of the seasonal forms. Diapause pupae, which had been chilled at 5℃ for more than 9 weeks, metamorphosed into spring form butterflies about 10 days after incubation at 25℃. When the diapause was interrupted by injection of ecdysterone on the first day or the second day after pupation, the pupae metamorphosed into summer form butterflies. However, when yhe diapause was terminated by the injection of ecdysterone on the 5th or 40th day after pupation, the pupae metamorphosed into spring form butterflies. These results suggested that the early phase of the diapuse is important in determination of seasonal forms.
社団法人日本動物学会の論文
1973-03-15