From: How 5000 independent rowers coordinate their strokes in order to row into the sunlight: Phototaxis in the multicellular green alga Volvox
Period of Darkness Before Illumination
(min)
Spheroids in Area 1*
(%)
SD
0
100
2.5
0-10
97.3
3.1
10-20
86.5
8.7
20-30
87.7
3.3
30-40
84.5
1.3
40-50
81.5
4.1
50-60
67.2
11.7
60-70
65.2
6.1
70-80
63.8
11.1
80-90
61.9
13.6