Contents

Biological Clocks in Mosquitoes - Section 2
The underlying mechanisms - how many clocks and why are they circadian?

Evidence from studies of median crepuscular species

Aedes punctor. This species is active in the wild in the mid-crepuscular range of illumination and this leads the present format of hypothetical sine waves (the light-active format is used here) perhaps to be not fully applicable. For this north European species, natural range 45-70°N, but studied from a British population (50°N) maximum L = 16.5h, the sine wave periods used are Lt = 30h and Dt = 22.5h.

Figure 41
Aedes punctor

The main peaks in all four of the histograms can be seen to be matched by sine wave peaks, notably the OFF SINE and ON SINE, but the OFF ANTISINE matches activity in D at 16h in the night in LD 4:20 and LD 8:16.

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©1998, 2010 - Brian Taylor CBiol FSB FRES
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