Figure 8.

Appendix B instantaneous power requirement of head rotation for a representative prey capture sequence of Hippocampus reidi filmed at 8000 frames per second (black circles). The open symbols represent the model output in case the same movie would have been sampled at 2000 frames per second (four possible samplings). Note that peak power calculated by the model using 2000  Hz data is between 77 and 97% of the peak power requirement based on 8000 Hz data. The total positive work tends to be consistently, slightly overestimated due to the reduced sampling frequency of 2000 Hz (103 to 109% when compared with 8000 Hz). The inaccuracy in pinpointing the starting time from 2000 frames per second video generally results in peak power requirements calculated at a couple of tenths of a millisecond later than in reality.