The bite of the piranha is definitely worse than the bark, but the bark is also used. A new study on the sounds produced by the Amazon piranhas finds that their submarine barks are an effective tool for identifying the various species of dark waters.
Scientists have previously documented a number of noises made by piranhas by linking muscles to gas stroke, but these studies were mostly done in the laboratory.
Next month, Rodney Rountree, The Fish Listener, will talk about his work with Victorian University Francis Juanes to document the fish calls in the presentation of the Peruvian Pacaire-Samirie National Reserve to the American Society of Acoustic Society's 176th meeting of the Canadian Acoustic Association's 2018 Acoustic Week in Canada, 5-9 In November in Victoria, British Columbia. These calls can be useful for tracking the populations of the bacon using passive acoustic monitoring.
"In the Amazon region, most habitats are very anxious, so you usually can not put the camera down and watch the behavior. The only way to look at the fish is to catch them," said Rountry. "Passive acoustics allow you to potentially find fish just by their sounds."
During a regular study, Rountree's "auditioned" catches the fish in the 2012 reserve by holding them gently under the water adjacent to the hydrophone to record any noises. In total, he read more than 550 people from at least 70 species of fish, including four types of piranhas. Using statistical analysis, Rountree can distinguish pirate species, even closely related, depending on their peak model.
Rountree also recorded submarine sound recordings at 22 locations in the reserve. He heard similar piranha headquarters where it was known that the patties were fed, as well as excited deniers of the catfish and other victims. "When the patties are present and nourished, they slip and kill, so other fish do a lot of sound," he said.
How can it be expanded to monitor piranhas in the wild? Scientists could potentially deploy hydrofoils from small boats to track how piracy affects the ecosystem. Such research can also help us understand how the fish move in the natural sound field and whether human activity is disturbing.
However, further research will be needed to determine the best ways to differentiate the species of piracy and to check the range of each type of sample. Factors such as ambient temperature and fish size can affect the sound.
As a simple, non-invasive method, passive acoustic surveillance could supplement or even replace the traditional fish survey methods by capture. "Often, the hardest is finding where they are," said Rountree. "Thus, any tool that helps you find fish is very useful."
The 150-million-year-old specimen of the piranhas is known in the past for bodily eating fish
Monday, November 5, 15.30 On November 15th, Rodney A. Rountree and Francis Juan's Presentation No.1pAB9, "Amazon Songs: Piranha and the Victim" will be held. Victorian Victorian Conference Center Crystal Ballroom (FE), British Columbia, Canada. acousticalsociety.org/asa-meetings/