ツヅレサセコオロギの長翅型発現率に及ぼす日長の影響について

概要

論文の詳細を見る
The effect of day-length on the occurrence of the macropterous form in a cricket, Scapsipedus aspersus WALKER was investigated. For the photoperiodic study three light conditions were prepared, i.e. 8,12 and 16 hours in day-length. For the test of the density effect two densities were set, i.e. one and two nymphs per Petri dish (12cm in diameter, 7cm high). The results show that when only one nymph is reared in a Petri dish the occurrence percentage of the macropterous form is not affected by the change of the day-length keeping a very low value, but when two nymphs are reared in a Petri dish it becomes higher at 16 hours day-length than at 8 hours or 12 hours day-length. Moreover, in the case of the long-day (16 hours day-length) the number of the moults increases being irrespective of the population density, and the larval period becomes longer and the head width of the adult larger. There is no relation between the wing form and the number of moults, the head width or the larval period. It seems from the above that the day-length affects the occurrence of the macropterous form of the present cricket in relation to the rearing density and also affects the number of the moults irrespective of the density.
日本生態学会の論文
1966-04-01