Do you dislike restaurants where noise ___1___ dinner? Seems that fish don't like a din with dinner either. Because loud sounds, for example from whizzing speedboats, distract them, and apparently ___2___ their predatory skills. So suggests a study in the journal Public Library of Science ONE. [Julia Purser and Andy Radford, "Acoustic noise induces attention shifts and reduces foraging performance in three-spined sticklebacks (Gasterosteus aculeatus)"]
Researchers took 12 fish tanks, and killed the gurgling filter sound to ___3___ the quiet of a calm lake. Then they immersed a speaker in each tank. And watched three-spined stickleback fish hunt water fleas, to the accompaniment of either white noise calibrated to match the noise level of speedboats or a silent track as a control.
Fish in each trial ultimately ___4___ the same numbers of prey. But the sticklebacks in noisy tanks spent more time attacking what's not for dinner, like bits of algae. And they often captured water fleas only to spit them out again.
The researchers say the buzz of boats may ___5___ from the hunt—causing fish to waste more time and energy chasing prey. Such inefficiency could contribute to declines in their numbers. And unlike us, fish can't ask the restaurant manager to turn the volume down as they dine.
【視聽(tīng)版科學(xué)小組榮譽(yù)出品】
drowns out impair mimic gobbled up divert attention
在吵吵鬧鬧的餐廳里用餐你愿意么？魚(yú)兒們貌似不太愿意被打擾?？焱Ъ柴Y而過(guò)的噪音就很讓它們心煩，不僅如此，它們的捕食能力也大受影響。該研究發(fā)現(xiàn)刊登在《公共科學(xué)圖書(shū)館?綜合》雜志上。 研究人員找來(lái)12個(gè)魚(yú)缸，然后把各個(gè)魚(yú)缸里面的過(guò)濾器全部“靜音”，這樣一來(lái)整個(gè)魚(yú)缸就跟平靜的湖水一樣安靜了，他們又給每個(gè)魚(yú)缸裝了一個(gè)揚(yáng)聲器。接下來(lái)就是一邊播放用白噪音模擬出來(lái)的快艇噪音，一邊觀察魚(yú)缸里的三刺魚(yú)怎樣捕食水蚤了；對(duì)照組在靜音模式下進(jìn)行。 實(shí)驗(yàn)組和對(duì)照組中的三刺魚(yú)最終捕食了相同數(shù)量的水蚤，區(qū)別在于，實(shí)驗(yàn)組中的三刺魚(yú)在藻類等非捕食目標(biāo)上費(fèi)了不少功夫，不僅如此，它們還常常把捕獲的水蚤吐出來(lái)╮(╯▽╰)╭ 研究人員稱船發(fā)出的噪聲能分散魚(yú)兒們的注意力——使得它們耗費(fèi)更多的時(shí)間、體力捕食。久而久之，魚(yú)類數(shù)量就會(huì)減少。更杯具的是，魚(yú)類也不能像我們一樣，在用餐的時(shí)候讓老板把音量調(diào)小一點(diǎn)╮(╯▽╰)╭