Field and laboratory experiments on the seasonal variation of the locomotor activity patterns in the desert terrestrial isopod Hemilepistus reaumurii
2021
Ayari, Anas | Jelassi, Raja | Ghemari, Chedliya | Nasri-Ammar, Karima
The locomotor activity pattern of the desert woodlouse Hemilepistus reaumurii was monitored over the four seasons in nature and in the laboratory. Results showed that the activity of this species was mostly concentrated during the day in nature as well as under controlled laboratory conditions. Moreover, two main peaks around sunrise and sunset described this activity; this bimodality was clearer in summer and fall than in winter and spring. Under controlled environmental conditions, the results indicated that individuals exhibited an endogenous rhythm of the locomotor activity with an astronomic and circadian 24 h period. The most clearly defined rhythm was found during the transition seasons in spring and fall whatever the imposed regimen.
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