科普專欄–薯不揀單 - 三十秒科學–在沙漠生活的雀鳥

（前排生病，測試咗唔係武肺。現在正常更番。)520Please respect copyright.ＰＥＮＡＮＡKDKbgV8wNe
520Please respect copyright.ＰＥＮＡＮＡtpr1XoHM4q
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。520Please respect copyright.ＰＥＮＡＮＡPjuowu5wWV
520Please respect copyright.ＰＥＮＡＮＡwdDfRSvWaE
520Please respect copyright.ＰＥＮＡＮＡqo9VbJUfJR
(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。520Please respect copyright.ＰＥＮＡＮＡqNSwrhpHpx
520Please respect copyright.ＰＥＮＡＮＡOq4opdf9hz
520Please respect copyright.ＰＥＮＡＮＡO6pZrkm3NV
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」。520Please respect copyright.ＰＥＮＡＮＡbLPo5bPPpY
520Please respect copyright.ＰＥＮＡＮＡAbNO1b3IEt
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。520Please respect copyright.ＰＥＮＡＮＡwkEwdF57NH
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。520Please respect copyright.ＰＥＮＡＮＡcgieg8uVyC
而當溫度達40度的時候，雀鳥們會開始熱叫。520Please respect copyright.ＰＥＮＡＮＡnBfRo8wWRm
520Please respect copyright.ＰＥＮＡＮＡhcoBAik4gz
520Please respect copyright.ＰＥＮＡＮＡggvQAYNB9X
(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。520Please respect copyright.ＰＥＮＡＮＡENA8v1KfLJ
520Please respect copyright.ＰＥＮＡＮＡeXHX2QSFAP
520Please respect copyright.ＰＥＮＡＮＡBhhnh1OncD
而會熱叫的雀仔，有部份能44度支撐20分鐘有多。520Please respect copyright.ＰＥＮＡＮＡEb5SZTm3cQ
520Please respect copyright.ＰＥＮＡＮＡJlNTxVjxKR
520Please respect copyright.ＰＥＮＡＮＡcwNqxp0G65
520Please respect copyright.ＰＥＮＡＮＡxhHb1TyeqB
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。520Please respect copyright.ＰＥＮＡＮＡvIWeW0UmPP
520Please respect copyright.ＰＥＮＡＮＡWsZCPXEmdf
https://www.youtube.com/watch?v=NggVoJ7mOos520Please respect copyright.ＰＥＮＡＮＡ18fkrwAWr9
520Please respect copyright.ＰＥＮＡＮＡrVjMS6usf2
但並不是所有雀鳥也能這樣做，至少班胸雀鳥沒有這功能。520Please respect copyright.ＰＥＮＡＮＡ85aLqzkKsn
520Please respect copyright.ＰＥＮＡＮＡeaIwUQjPcS
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。520Please respect copyright.ＰＥＮＡＮＡ1fLh5LQ7V2
520Please respect copyright.ＰＥＮＡＮＡ0ypMBQw8TC
至少，懂得熱叫的雀鳥也較抵禦高溫。520Please respect copyright.ＰＥＮＡＮＡ5FpHj6NWfT
520Please respect copyright.ＰＥＮＡＮＡunObfGq2ik
520Please respect copyright.ＰＥＮＡＮＡ1pONo4t14t
520Please respect copyright.ＰＥＮＡＮＡOyOhA4f1lD
520Please respect copyright.ＰＥＮＡＮＡ1XlXDSgn9T
520Please respect copyright.ＰＥＮＡＮＡY1vg5Se2FR
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。520Please respect copyright.ＰＥＮＡＮＡ7F8gy9Lvh1
520Please respect copyright.ＰＥＮＡＮＡJCxri6LcXI
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/toc520Please respect copyright.ＰＥＮＡＮＡ8nJlheoWA5
520Please respect copyright.ＰＥＮＡＮＡr5zLUmHxsK
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。520Please respect copyright.ＰＥＮＡＮＡCns9teEEyM
520Please respect copyright.ＰＥＮＡＮＡm5VJDH7lb0
Link:520Please respect copyright.ＰＥＮＡＮＡhs4BHTDFbR
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio520Please respect copyright.ＰＥＮＡＮＡRONfX5tkZE
520Please respect copyright.ＰＥＮＡＮＡi7wdUwaGnc
520Please respect copyright.ＰＥＮＡＮＡRUupWMF4RT
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。520Please respect copyright.ＰＥＮＡＮＡy5jkNTH5mf
520Please respect copyright.ＰＥＮＡＮＡErPBUz1KFD
Ref1:https://www.nature.com/articles/s41598-020-75909-6520Please respect copyright.ＰＥＮＡＮＡNaZlaVQYBk

ns216.73.216.190da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章