Table 1 Chronology of nurse shark behavior and association with bottlenose dolphins, including the shark’s overall dynamic body acceleration (ODBA), tailbeat frequency, body pitch, vertical velocity, and percent of time that dolphins were visible in the camera frame for each behavioral period
Start time | Duration (s) | ODBA (mean ± SD) | Tailbeat frequency (Hz) | Pitch (deg) | Vertical velocity (ms−1) | Dolphins visible (%) | |
|---|---|---|---|---|---|---|---|
Control | 2021-06-26 18:26:53 | 1800 | 0.13 ± 0.07 | 0.45 | − 1.6 (− 21 to 23.7) | 0 (− 0.2 to 0.3) | 0 |
Ascent | 2021-06-26 18:56:53 | 23 | 0.35 ± 0.16 | 1.11 | − 45.4 (− 58.8 to − 13.8) | − 1.0 (− 1.3 to − 0.2) | 57 |
Surface | 2021-06-26 18:57:16 | 52 | 0.17 ± 0.08 | 0.60 | − 2.5 (− 13.8 to 15.3) | 0 (− 0.4 to 0.3) | 96 |
Descent | 2021-06-26 18:58:08 | 28 | 0.11 ± 0.07 | 0.39 | 37.9 (9.7 to 41.5) | 0.9 (0.2 to 1.1) | 39 |
Bottom | 2021-06-26 18:58:36 | 205 | 0.11 ± 0.06 | 0.59 | − 1.9 (− 13.5 to 9.7) | 0 (− 0.2 to 0.2) | 27 |
Ascent | 2021-06-26 19:02:01 | 29 | 0.36 ± 0.15 | 1.14 | − 33.9 (− 41.5 to − 13.5) | − 0.8 (− 1.1 to − 0.2) | 21 |
Surface | 2021-06-26 19:02:30 | 63 | 0.19 ± 0.09 | 0.59 | − 4 (− 19.3 to 27.7) | 0 (− 0.3 to 0.4) | 98 |
Descent | 2021-06-26 19:03:33 | 31 | 0.29 ± 0.26 | 0.43 | 45.5 (6.7 to 69.3) | 0.7 (0.1 to 1.2) | 94 |
Bottom | 2021-06-26 19:04:04 | 230 | 0.13 ± 0.08 | 0.51 | − 0.5 (− 22.8 to 37.6) | 0 (− 0.4 to 0.5) | 44 |
Ascent | 2021-06-26 19:07:54 | 32 | 0.31 ± 0.14 | 0.83 | − 41.9 (− 59.4 to 7.7) | − 0.7 (− 1.2 to − 0.1) | 38 |
Surface | 2021-06-26 19:08:26 | 51 | 0.15 ± 0.07 | 0.54 | − 3.2 (− 15.6 to 13.8) | 0 (− 0.3 to 0.2) | 69 |
Descent | 2021-06-26 19:09:17 | 20 | 0.12 ± 0.07 | – | 50.2 (13.8 to 64.3) | 1.2 (0.2 to 1.6) | 70 |
Bottom | 2021-06-26 19:09:37 | 136 | 0.11 ± 0.06 | 0.55 | − 2.5 (− 25 to 16.8) | 0 (− 0.3 to 0.6) | 26 |
Control | 2021-06-26 19:15:09 | 1800 | 0.10 ± 0.05 | 0.49 | − 1.5 (− 10.3 to 6.2) | 0 (− 0.1 to 0.1) | 0 |