科普專欄–薯不揀單 - 三十秒科學–老鼠的習性

老鼠與人類均是雜食性動物(Omnivores)，而老鼠每日約有80%的食物均是在晚上進食的。939Please respect copyright.ＰＥＮＡＮＡxBiZ8uRffR
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若果晚上(>12hr)不讓老鼠進食的話，牠們的體重平均來說會減去10%左右。939Please respect copyright.ＰＥＮＡＮＡTmrfw5WnSg
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約連續22小時不讓牠們進食後，牠們腸道便會變得空空如也。939Please respect copyright.ＰＥＮＡＮＡwzuBvum4qF
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（圖2）老鼠是夜行性(Nocturnal)動物，牠們眼球內負責辨認顏色的錐體少得非常可憐，純粹依靠感應紫外線的接受器，透過紫外線的強弱了解世界。939Please respect copyright.ＰＥＮＡＮＡCeeZs1kD3s
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只不過的是，牠們大多偏愛清晨時份進行交配行為。939Please respect copyright.ＰＥＮＡＮＡiUpPHxIsM7
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（圖3）老鼠的感覺毛 (Whiskers)有著感測聲音的能力，其排列大多是五橫行分佈，每行約有五至九點。939Please respect copyright.ＰＥＮＡＮＡbhMtS1OvTz
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越靠近嘴部的感覺毛，所能感測的聲音頻率亦越高。939Please respect copyright.ＰＥＮＡＮＡm0AgTN5mWA
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人類最高能感測至20k Hz的音頻，而老鼠最高則能去到90k Hz，高於20k Hz的超聲波(Ultrasound)同時亦是老鼠聽力最為敏感的區域。939Please respect copyright.ＰＥＮＡＮＡJ5sDXCk4YD
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利用超聲波驅逐或者招來老鼠，或許可行。939Please respect copyright.ＰＥＮＡＮＡrBIumiRKmU
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