Do you know what Penguins sounds like?
Depending on the type, Penguins produce diverse and magical sounds from low groaning voices to high voices sounded far away. It has a variety of implications, such as to defend the territory, to distinguish children, to find fellows, but it is thought to be useful for forming breeding grounds in herds.
Published in Scientific Reports, the results of the survey are shown mainly when the Antarctic Islands in New Zealand and the Gentoo penguin inhabiting the Antarctic region cry when they swim for food and what changes will occur.
Gentoo penguin prefers to prey on crustaceans such as fish and small shrimp. However, it is something that is chaotic to the rough waves in a freezing land that follows the state of searching for their food for investigation.
In such circumstances, the first observational evidence after mounting a video camera on the back was a research team led by Won Young Lee of Korea Polar Research Institute.
From 2014 to 2016, 598 birds collected from 10 penguins near King George Island in Antarctica are used for analysis of acoustic characteristics, as well as linking with actions such as diving patterns, collective actions, food search, etc. The result is that the gentoo penguins crown on the surface of the sea is related to " calling out fellows ".
It was observed that friends gathered and formed a flock within one minute after the barking echoed with a probability of almost 50%. Comparing the situation before and after crying, there was no significant change in the latency for searching for food and the predation success rate, but after the crying, it became shallow and short dive, and similar places It is said that it started to swim a new area than to wander around.
Mr. Lee seems to believe that dolphins and whales make a large flock as well, but they are different from the characteristics of penguins. "We found that penguins have some kind of strategy to form flocks by verbal communication, we still need a lot of investigation on how we communicate in the open ocean." It is.
Indeed, it seems that factors that can not be shown in one paper are involved. As Mr. Lee considers, if there is a strategy for predation of penguins, what differences exist between those who make signs and that in the case of collective actions, shares can not be shared equally Taking into consideration, it seems that factors other than singing can not be thrown away.
