抄録
In Antheraea yamamai, the duration from pupation to moth emergence was examined under various environmental conditions. The pupae, when they were placed under natural photoperiod of about 14.5L to 12L at a room temperature of about 31°C to 22°C, required about 52 days (min. 27 days; max. 66 days) to emergence. In contrst to this, the pupal duration was about 32 day (min. 30 days; max. 36 days) when kept in a condition of 12L-12D photoperiod and temperature of 20°C, and about 29 days (min. 24 days; max. 34 days)when kept in a condition of 12L-12D photoperiod and temperature of 25°C. On the other hand, when kept in 24L photoperiod and 26°C the pupal duration was about 62 days (min.25 days; max. 107 days). This shortening of the duration till emergence must be due to a quick termination of summer diapause, but not to a accelerated development in post-diapause period. Evidence supporting this idea was obtained by observing the signal of adult development occurring inside the pupal cuticle from the outside.
