Tracking a great white [electronic tracking tag]

Researchers at the Monterey Bay Aquarium, in California, took a big step forward in penetrating the secrets of the great white shark, thanks to the capture of a young female shark and a fourth-generation electronic tracking tag. To obtain basic information, researchers use tags with microprocessors and flash memory to record various parameters, such as water pressure and light levels. These implanted tags reveal the great white shark's movement and behavior and, after a specified period, detaches itself from the shark's dorsal fin and radios its readings. From this information, researchers could put together a complex picture of the shark's behavior. The PAT tag can estimate the shark's location each day and map the shark's travels.