（前排生病，測試咗唔係武肺。現在正常更番。)670Please respect copyright.ＰＥＮＡＮＡdd6ir4QxOH
670Please respect copyright.ＰＥＮＡＮＡ5eWOBGrTnH
沙漠經常被描繪成為鳥不生蛋的地方。雖有不少動物均會採取夜行性方針躲避有機會超過50度高溫的日間環境。但現實上仍有選擇在日間行動的沙漠雀鳥。670Please respect copyright.ＰＥＮＡＮＡJ33HxBsnIP
670Please respect copyright.ＰＥＮＡＮＡgcCEQ1XWTf
670Please respect copyright.ＰＥＮＡＮＡZIfCDGkiRa
(圖2)有資料顯示，居住在沙漠的雀鳥，每天有數小時可以維持自己體溫低於外間溫度10-20度左右。670Please respect copyright.ＰＥＮＡＮＡDnYk4jqbgC
670Please respect copyright.ＰＥＮＡＮＡuGnRBjZHMs
670Please respect copyright.ＰＥＮＡＮＡQyhhS2rDhG
而斑胸草雀是其中一種能適應沙漠氣溫的雀鳥，有研究發現，牠們在高溫下會發出獨特快速節奏的高音叫聲，下稱「熱叫」。670Please respect copyright.ＰＥＮＡＮＡSd5Oe1cxyK
670Please respect copyright.ＰＥＮＡＮＡz3C5a6tunW
研究人員找來44隻斑胸草雀，其中有32隻(73%)會遇熱時會發出熱叫。670Please respect copyright.ＰＥＮＡＮＡqugt7ZX5Fb
如圖中所示，隨著溫度逐漸提升，喘氣所佔用的時間開始增加。670Please respect copyright.ＰＥＮＡＮＡfVDuEeisn8
而當溫度達40度的時候，雀鳥們會開始熱叫。670Please respect copyright.ＰＥＮＡＮＡ152Ntjt4i2
670Please respect copyright.ＰＥＮＡＮＡqcGRnHK2H8
670Please respect copyright.ＰＥＮＡＮＡ8L1ICc0EyE
(圖3)不懂熱叫的雀仔，在42度的時候開始出現失去平衝等不適狀態，實驗立即停止。670Please respect copyright.ＰＥＮＡＮＡijQXOiGi9u
670Please respect copyright.ＰＥＮＡＮＡxWStBeFMx2
670Please respect copyright.ＰＥＮＡＮＡIkxGgJjNA8
而會熱叫的雀仔，有部份能44度支撐20分鐘有多。670Please respect copyright.ＰＥＮＡＮＡUd9KK3Thqd
670Please respect copyright.ＰＥＮＡＮＡ5fBFSr9oM4
670Please respect copyright.ＰＥＮＡＮＡCgXkdHElr0
670Please respect copyright.ＰＥＮＡＮＡ9QtwBPuTfr
有部分雀鳥會透過gular flutter來抵禦高溫，如下面影片一樣，雀鳥會透過振盪來讓熱空氣與內裡濕潤的內壁環境接觸，熱空氣會蒸發內壁環境的水滴（水滴的能量會轉移到空氣中，因此水滴的溫度會降低），因而盡量減低身體溫度。670Please respect copyright.ＰＥＮＡＮＡfG7nGQuwvE
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https://www.youtube.com/watch?v=NggVoJ7mOos670Please respect copyright.ＰＥＮＡＮＡRAQwE3CY19
670Please respect copyright.ＰＥＮＡＮＡ5uPYlF03cy
但並不是所有雀鳥也能這樣做，至少班胸雀鳥沒有這功能。670Please respect copyright.ＰＥＮＡＮＡpcijg9S4RQ
670Please respect copyright.ＰＥＮＡＮＡVZmkzOwBkc
或計熱叫就是牠們發展出的一種散熱方式，可能原理非常接近，但還需進一步的確認。670Please respect copyright.ＰＥＮＡＮＡJA0Oh6tyv6
670Please respect copyright.ＰＥＮＡＮＡ5Whr1o2vYX
至少，懂得熱叫的雀鳥也較抵禦高溫。670Please respect copyright.ＰＥＮＡＮＡ9MbfuSFusO
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670Please respect copyright.ＰＥＮＡＮＡiKd7fr5MQu
如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。670Please respect copyright.ＰＥＮＡＮＡMOXJ0nDmZK
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc670Please respect copyright.ＰＥＮＡＮＡHbnGfB4DN6
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。670Please respect copyright.ＰＥＮＡＮＡkEJz9tbMIO
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Link:670Please respect copyright.ＰＥＮＡＮＡkWDkkVDNcA
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio670Please respect copyright.ＰＥＮＡＮＡTj7xaENPnp
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除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。670Please respect copyright.ＰＥＮＡＮＡXP5UrKfpAq
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Ref1:https://www.nature.com/articles/s41598-020-75909-6670Please respect copyright.ＰＥＮＡＮＡBp9wLyRphe
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