Table 1 Transportation process and the summary of relation between the behavior of a bottlenose dolphin (Tursiops truncatus) and the profile of frequency distribution in EEG
Date | Time (recording no.) | Transportation process | Behavior of dolphin (times/period of video recording) | Profile of frequency distribution in EEG | Process |
|---|---|---|---|---|---|
26/02/2004 | 21:00–21:20 | – | – | – | Removal the dolphin from its pool and placement in a seawater container |
21:20–21:34 (1) | Waiting for departure overland | Movement of head up and down, 42 times and emitting sonant, 23 times/156 s | Dominant frequency range is 5–15 Hz (60–80%) | Waiting for departure by truck | |
27/02/2004 | 21:34–02:05 | – | – | – | Transport overland |
02:05–02:30 (2) | Waiting for departure by ferry | No movement and no sonant/256 s | Frequencies within 5–40 Hz appear almost even frequency range of 15–25 Hz predominates | Waiting for ferry departure | |
02:30–04:40 | – | – | – | Boarding and transport by ferry | |
04:40–08:40 | – | – | – | Transport overland | |
08:40–09:06 (3) | Preparation to drain sea water | No movement and emitting sonant, 3 times/507 s | Frequency range of 5–15 Hz starts to appear more often | Preparation for draining sea water from the container | |
09:06–09:13 | – | – | – | Draining seawater from the Container | |
09:13–09:22 | – | – | – | Removing the container from the truck | |
09:22–09:26 (4–1) | Inflowing sea water into the container | Small head movement, one time and emitting sonant, 2 times/262 s | Frequency range of 5–15 Hz appears more often | Inflowing seawater into the container | |
09:26–09:28 (4–2) | Preparation for transfer to the pen next to a pier in the ocean | Intermittent head movement, 2 times and emitting sonant, 2 times/100 s | Frequency range of 5–15 Hz starts to fall off and 15–25 Hz appears more often. | Preparation for transfer to the pen next to a pier in the ocean | |
09:28–09:32 (5–1) | Movement of the container to the pen | No movement and emitting sonant, 3 times/197 s | Almost unchanged from above | Moving the container close to the pen next to a pier in the ocean | |
09:32–09:35 (5–2) | Setting a crane to the stretcher with wire | Movement of head up and down, 3 times and emitting sonant, 5 times/103 s | Frequency range of 5–15 Hz appears more often and the 15–25 Hz range is less common | Setting a crane to the stretcher with wire | |
09:35–09:40 | – | – | – | The dolphin was released into the pen and began to swim normally |