Figure 4. Turn frequency during tracking.

The frequency of turns (turns/s), during the tracking phase, in three species of sharks, the blacktip shark, Carcharhinus limbatus, the bonnethead, Sphyrna tiburo, and the nurse shark, Ginglymostoma cirratum, with all senses intact (control) and following blocks of the sensory systems indicated in the figure legend (LL: lateral line). Error bars are ± s.e.m. * denotes treatments that are significantly different from control at α = 0.05; for comparisons among treatments, see Tables S1–S3. Nurse shark illustration copyright José Castro, with permission. Bonnethead, and blacktip shark illustrations copyright Diane Peebles, with permission.