Marine Biologists from the University of Hawaii and the University of Tokyo attached cameras, accelerometers and transmitters to about 30 sharks in an effort to learn more about their behaviors. They presented their findings at the 2014 Ocean Sciences Meeting in Honolulu in February.
Previously sharks were tracked via instruments only to see where they traveled. Observations were made mainly with captive sharks.
The scientists flipped over the sharks, which puts them in a trancelike state, then attached the instrument package (flight recorders for sharks) to one of their fins. They then released the sharks. The apparatus falls off and is then located via the transmitter.
Here, you can see some sharks swimming from the recovered data:
Initial observations from the shark-cam:
- Sharks used powered swimming more than a gliding motion, whereas the opposite was presumed.
- Deep-sea sharks swim more slowly than shallow water species.
Their next goal is to create ingestible recorders that can give more insight into their eating and digestion habits.