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Like a pit bull, piranhas will tear the flesh from your bones. Also like a pit bull, they bark. [piranha audio type 1] Kind of.
如同斗牛一樣，食人魚可以撕出人骨頭中的肌肉，它們也會像斗牛一樣的吼叫[食人魚音頻類型之一]。
Scientists had known that piranha barked when you pick them up—carefully, of course. But they hadn’t known what these sounds were for. So researchers examined how the vocalizations might correspond with behavior.
科學家已經知道，當人類擁抱食人魚時，它們會叫——當然，人類要小心一些。但科學家不知道它們為什么發出這樣的聲音，因此研究人員對這種發音行為進行了研究。
They dropped a microphone into a piranha tank that, at different times, held three groups of 10 fish. They then placed a mussel in to see how the fish competed for food.
在不同時段，科學家們把麥克風放在食水魚水箱中，這個水箱中有１０條食人魚，它們為分３組�？茖W家們向水中投入貽貝，來觀察食人魚是如何爭奪食物的。
When the fish faced off, they produced that percussive bark. [piranha audio type 1]
當食人魚開始對抗爭奪獵物時，它們發出撞擊式的聲音。[食人魚音頻類型之一]
When they circled one another, they made a softer thud sound. [piranha audio type 2]
當它們彼此轉圈游來游去時，它們發出一種柔和的撞擊聲。[食人魚音頻類型之二]
A teeth-gnashing [piranha audio type 3] indicated that a piranha was getting pretty ticked off as it chased a competitor.
食人魚發出咬牙的聲音[食人魚音頻類型之三]表示它們在追逐對手時，超越了對手。
前二種類型的音頻是通過食人魚膘周的肌肉發出的。這個研究成果發表在《生物學實驗雜志上》。[作者：Sandie Millot, Pierre Vandewalle 和 Eric Parmentier,《紅色食人魚是如何發聲的》（Pygocentrus nattereri, Kne）：聲音、行為與功能研究；Sandie Milot的食人魚音頻禮儀 ]
The researchers are now interested in whether piranhas vocalize during mating. But they’ll have to travel to Brazil to study this in the wild—turns out that when it comes to mating in captivity, piranhas say, "no tanks."
研究人員現在研究，食人魚在交配時是否發聲。他們只有旅行到巴西才能進行這項野外研究——尋找在圈養的情況下，食人魚什么時候開始交配，但食人魚卻說：“要在沒有水網箱的地方才能交配。”
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