Chelonia LimitedWildlife Acoustic Monitoring | ||
Species detectionThe toothed whales include all dolphins, porpoises, orcas, beaked whales, sperm whales and pilot whales. All toothed cetaceans make echo-location clicks and in every case except the sperm whale these are almost certain to be detectable by PODs. To date, PODs have been shown to detect the species listed below. More information on these species can be found on the Convention on Migratory Species web site.
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. The main energy in sperm whale (Physeter catodon) clicks is below the POD's frequency range and therefore may not be detectable.
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