동물들의 의사소통에 대한 조사(영문)

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동물들의 의사소통에 대한 조사(영문)

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☆Humpback Whales
〔Whale Song〕
〔Click for Whale Song〕
〔How long is a song?〕

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Humpback whales, as well as many other marine animals, use a form of songs to communicate through the water. Sound travels over four times as fast in water than it does on land. Whales use their songs are most often used as mating calls for the opposite sex. Males use these songs as a way of intriguing the opposite sex. Whether alone with a female whale or competing with other whales to get the female whale’s attention, the male whales sing beautiful songs as a type of “flirting”. These songs can last as long as thirty minutes and are usually split up into small parts of about two to four minutes called themes. Whales often repeat these half hour songs over and over for many hours and sometimes even days. Scientists have discovered that these songs are geographically specific because whales of the same area will often sing variations of different songs whereas whales from distant regions sing entirely different songs.
Whale songs are also used as feeding calls. The call is about five to ten seconds long in order to attract the other whales to get ready for a hunt. They then form a group and lung upwards together in order to catch and eat schools of fish at a time. When singing whales swim to about 20-25 meters below the surface and slant their head at a 45 degree angle. They remain here throughout the singing period.

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