|
Chelonia Limited Cetacean Monitoring Systems |
Species detection |
|
To date, T-PODs have been shown to detect the species listed below. Please click on the links below for information on each species. Beluga, Delphinapterus leucas Boto, Inia geoffrensis Bottlenose dolphin, Tursiops truncatus Common dolphin, Delphinus delphis Harbour porpoise, Phocoena phocoena Indo-Pacific humpback dolphin, Sousa chinensis Long-finned pilot whale, Globicephala melas Maui dolphin, Cephalorhynchus hectori maui (subspecies of Hector's dolphin) Risso's dolphin, Grampus griseus Short-finned pilot whale, Globicephala macrorhynchus Susu, Platanista gangetica Tucuxi, Sotalia fluviatilis The T-POD is best suited to monitoring species with long, highly tonal (narrowband) clicks, as there are fewer other click sources that are similar. These species include all porpoises, Cephalorhynchus sp., Kogia and probably the beaked whales. In quiet locations, over 40% of clicks identified in porpoise monitoring occur as click trains. Similar rates can be found from dolphins in such quiet locations as the Amazon. More typically, in dolphin monitoring, less than 5% of the clicks are in trains. This is because their clicks are less distinctive, so more non-cetacean clicks are logged at the maximum bandwidth required to include the cetacean clicks and because more echoes and multi-path duplicates of clicks are received from these louder animals. Sperm whales, Physeter catodon may be difficult to monitor, although monitoring has not yet been tried. Orca, Orcinus orca monitoring in Tysfjord, Norway has been attempted, but the large number of fishing boat sonars transmitting at orca frequencies was a major challenge.
|
|