Fig. 4
From: Scalloped hammerhead sharks swim on their side with diel shifts in roll magnitude and periodicity
Diel variation in swimming performance and roll behavior. A wavelet spectrogram of the heaving acceleration for 9 night–day cycles from HH11. Warmer colours in the spectrogram represent stronger signals, whereas cooler colours represent weaker signals. The signal is weaker during each daytime period, indicating a less consistent tailbeat and frequent gliding behavior associated with the changes in the rolling behavior