Vk. Sharma et al., Irradiance dependency of UV-A induced phase shifts in the locomotor activity rhythm of the field mouse Mus booduga, CHRONOBIO I, 17(6), 2000, pp. 777-782
In the nocturnal field mouse Mus booduga, the responsiveness of the circadi
an system to UV-A light of 2.5 W/m(2) and 30 minutes duration is known to b
e phase dependent. The results of our experiments indicate that the phase s
hifts evoked by UV-A at the two phases, CT14 (circadian time 14) and CT20 i
ncreases nonlinearly with irradiance.