Fig. 5
From: Characterization of the daily and circadian valve behavior of the European flat oyster Ostrea edulis

Anticipation of valve activity diel behavior to daily light cycles. Mean daily profile of mean VOA (left panel) and mean VOD (right panel) during the 6 references 12 L :12 D series (n = 16–32). In doted lines, the profiles of each series (n = 6 series, series 1, 3, 5, 7, 9, 11). In bold solid line, the mean profile of the 6 series. The dotted orange lines represent the photoperiod for the 6 references 12 L :12 D series.