Effect of temperature on circadian rhythm controlling the crepuscular activity of the burying beetle Nicrophorus quadripunctatus Kraatz (Coleoptera: Silphidae)
Article first published online: 22 DEC 2005
Volume 8, Issue 4, pages 331–338, December 2005
How to Cite
NISIMURA, T., NUMATA, H. and YOSHIOKA, E. (2005), Effect of temperature on circadian rhythm controlling the crepuscular activity of the burying beetle Nicrophorus quadripunctatus Kraatz (Coleoptera: Silphidae). Entomological Science, 8: 331–338. doi: 10.1111/j.1479-8298.2005.00132.x
- Issue published online: 22 DEC 2005
- Article first published online: 22 DEC 2005
- Received 13 March 2005; accepted 22 June 2005.
- bimodal daily rhythm;
- circadian clock;
- locomotor activity;
Locomotor activity rhythm was examined at various temperatures under a 16 h light : 8 h dark photoperiod (LD 16:8) or LD 12:12 using adults of the burying beetle Nicrophorus quadripunctatus. At 20°C, the locomotor activity of the beetles showed a bimodal daily pattern with two peaks around lights on and lights off under both photoperiods. This bimodal activity rhythm persisted under constant darkness; therefore, the activity of adult N. quadripunctatus is controlled by a circadian clock. Adults showed a bimodal activity pattern for temperatures ranging from 15 to 25°C. The evening peak of the daily activity was earlier at lower temperatures. These findings suggest that in the field, N. quadripunctatus shows crepuscular activity, and is active earlier in the afternoon in cooler seasons. In this species, therefore, temperature appears to play an important role in the determination of daily activity patterns.