Effect of different lighting conditions on circadian developmental rhythms and behaviour in Ephestia kuehniella Zell
Titel:
Effect of different lighting conditions on circadian developmental rhythms and behaviour in Ephestia kuehniella Zell
Auteur:
Giebultowicz, Jadwiga M. Cymborowski, B.
Verschenen in:
Biological rhythm research
Paginering:
Jaargang 7 (1976) nr. 2 pagina's 119-126
Jaar:
1976-06
Inhoud:
A study was made on the developmental rhythms of Ephestia kuehniella during different photoperiods: constant lighting (L/L), under conditions of 12 hours light per day (L/D) and in constant darkness (D/D). Observations were made every 2 hrs, for 3 successive 24-hr periods, of the number of wandering larvae emerging from food, the number of pupations and of imaginai moults. Emergence of wandering larvae is rhythmic only under L/D conditions, and in addition this is also affected by the density of the larvae. Rhythm is least apparent with greatest density of the larvae. Pupation in E. kuehniella is a non-rhythmic process with each of the photoperiods examined, whereas the imaginai moult is characterized by an endogenous (existing under D/D conditions) rhythm. Emergence of imagines is non-rhythmic under L/L, and also when pupae under L/D fail to receive the final period of darkness. The rhythm of the imaginai moult is possibly controlled by the biological clock, which stops under conditions of constant light.
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