(前排生病,測試咗唔係武肺。現在正常更番。)518Please respect copyright.PENANAJhwi3u48fa
518Please respect copyright.PENANA6q7YMW3DO2
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。518Please respect copyright.PENANA1elALDsMHP
518Please respect copyright.PENANADiJQerVyJb
518Please respect copyright.PENANA7Kv3s5t5cB
(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。518Please respect copyright.PENANA74qvy9RvGV518Please respect copyright.PENANAnhPkXdNLmf
518Please respect copyright.PENANAKYI6Dr83eS
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」。518Please respect copyright.PENANAgVxhqPyBbX
518Please respect copyright.PENANA3WcNfQ4a6U
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。518Please respect copyright.PENANA63MGkXVDOj
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。518Please respect copyright.PENANAnbex3uWIyK
而當溫度達40度的時候,雀鳥們會開始熱叫。518Please respect copyright.PENANAlr8Vn2RJ4I
518Please respect copyright.PENANAREaPiLLqo5
518Please respect copyright.PENANA8PMom8P9V3
(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。518Please respect copyright.PENANAbKrKUFv9po518Please respect copyright.PENANAIVXgBJfLJk
518Please respect copyright.PENANAI1kwZyNO9q
而會熱叫的雀仔,有部份能44度支撐20分鐘有多。518Please respect copyright.PENANAB0uTZsjdkz
518Please respect copyright.PENANAvgYpBCNL58
518Please respect copyright.PENANAbRvdywPCRq
518Please respect copyright.PENANAcYPzCzKWOz
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。518Please respect copyright.PENANAqnrPS4EofD
518Please respect copyright.PENANAiV77lkzh1N
https://www.youtube.com/watch?v=NggVoJ7mOos518Please respect copyright.PENANAdTW3IGQvMZ
518Please respect copyright.PENANAsU0GN2CNah
但並不是所有雀鳥也能這樣做,至少班胸雀鳥沒有這功能。518Please respect copyright.PENANAp5fvDgSoRK
518Please respect copyright.PENANASWOvpM7BKE
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。518Please respect copyright.PENANAYBjR70pUec
518Please respect copyright.PENANAgYfsIu0C1E
至少,懂得熱叫的雀鳥也較抵禦高溫。518Please respect copyright.PENANA6yhF1vA84K
518Please respect copyright.PENANA8zjZR3qi8T
518Please respect copyright.PENANALhwAKHoPAT
518Please respect copyright.PENANAPNoERfMgbq
518Please respect copyright.PENANAql4CvfMg5A
518Please respect copyright.PENANAg62EunjK2Y
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。518Please respect copyright.PENANAaHsQvDaIz0
518Please respect copyright.PENANAz3J8h733mD
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/toc518Please respect copyright.PENANAipGLUite1x
518Please respect copyright.PENANAkTVcYPOsWP
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。518Please respect copyright.PENANAshf4nszuD9
518Please respect copyright.PENANARgYzaprdVH
Link:518Please respect copyright.PENANAh7vUwMC1jf
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio518Please respect copyright.PENANAEUuRokb3re
518Please respect copyright.PENANAOQMyeqReoY
518Please respect copyright.PENANAfT6m94liTF
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。518Please respect copyright.PENANAuckfnGrLsv
518Please respect copyright.PENANA8McbaO0ziu
Ref1:https://www.nature.com/articles/s41598-020-75909-6518Please respect copyright.PENANAPp6ZH3xYLf