(前排生病,測試咗唔係武肺。現在正常更番。)463Please respect copyright.PENANAz5fWifBVd6
463Please respect copyright.PENANAfrgxbI29VH
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。463Please respect copyright.PENANAzi3G2wV9GX
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(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。463Please respect copyright.PENANAyqXGCrsDCY463Please respect copyright.PENANAyYPAocOTHi
463Please respect copyright.PENANA00sd0Iu6UB
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」。463Please respect copyright.PENANA92FhszA474
463Please respect copyright.PENANAg3JBep6bFB
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。463Please respect copyright.PENANAcJuO2SlFjO
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。463Please respect copyright.PENANAlg1Iu4hHgv
而當溫度達40度的時候,雀鳥們會開始熱叫。463Please respect copyright.PENANA3m2da8Z4iE
463Please respect copyright.PENANApkCgKTO6fI
463Please respect copyright.PENANAjrLBUh4n0N
(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。463Please respect copyright.PENANA0Qtf77fLJm463Please respect copyright.PENANA2hyfOl9S8p
463Please respect copyright.PENANA3P3lxEzTVU
而會熱叫的雀仔,有部份能44度支撐20分鐘有多。463Please respect copyright.PENANAbLB243rc83
463Please respect copyright.PENANAdFHnSvX40C
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463Please respect copyright.PENANAVkZrDL8zn9
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。463Please respect copyright.PENANAM0woJcQ6jl
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https://www.youtube.com/watch?v=NggVoJ7mOos463Please respect copyright.PENANA2YctuHiwyh
463Please respect copyright.PENANA2wHnnEzW53
但並不是所有雀鳥也能這樣做,至少班胸雀鳥沒有這功能。463Please respect copyright.PENANAdoebMyYBvN
463Please respect copyright.PENANARaYd16oYJD
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。463Please respect copyright.PENANALYehBDvRDx
463Please respect copyright.PENANAYPXbk1rzPX
至少,懂得熱叫的雀鳥也較抵禦高溫。463Please respect copyright.PENANANjL2LlFucH
463Please respect copyright.PENANA21F8QiJg7I
463Please respect copyright.PENANAAByPqfMZA1
463Please respect copyright.PENANAFwcsxe2TeB
463Please respect copyright.PENANAfEElMC769l
463Please respect copyright.PENANA6aAkgAqjZy
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。463Please respect copyright.PENANABzrHhjFv1Q
463Please respect copyright.PENANA0l6IHuCGlF
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/toc463Please respect copyright.PENANA4AmCAadqHp
463Please respect copyright.PENANABbMwdi1JrK
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。463Please respect copyright.PENANANvOJkSFw7r
463Please respect copyright.PENANAAE4p5ARImy
Link:463Please respect copyright.PENANA0CCXo2wy1t
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio463Please respect copyright.PENANAue2uLEWdrS
463Please respect copyright.PENANASU1P3i7Aic
463Please respect copyright.PENANAYkwN45iuQL
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。463Please respect copyright.PENANAcYV1mvnKhg
463Please respect copyright.PENANAoRCCa6PDiB
Ref1:https://www.nature.com/articles/s41598-020-75909-6463Please respect copyright.PENANARQzx5fDVsz
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薯仔聞茱莉

篇 #191
三十秒科學–在沙漠生活的雀鳥
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