(前排生病,測試咗唔係武肺。現在正常更番。)521Please respect copyright.PENANAknFfkigYW6
521Please respect copyright.PENANADxe9Kh3utE
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。521Please respect copyright.PENANAb9kIs5g4JH
521Please respect copyright.PENANAEhlrdRInht
521Please respect copyright.PENANA0BnV8PFkzf
(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。521Please respect copyright.PENANAoY4zyxCVqT521Please respect copyright.PENANA9dkOFTrYRs
521Please respect copyright.PENANAs00sX6Hhdc
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」。521Please respect copyright.PENANAnF1Xh5YQWX
521Please respect copyright.PENANAErFFdyYOPZ
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。521Please respect copyright.PENANAmaT6UstOS2
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。521Please respect copyright.PENANAMo3D6rIX0g
而當溫度達40度的時候,雀鳥們會開始熱叫。521Please respect copyright.PENANASyIdjBFxxX
521Please respect copyright.PENANAAasxOm92j2
521Please respect copyright.PENANA1GlQZqB6uJ
(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。521Please respect copyright.PENANAOSj3TARRnV521Please respect copyright.PENANA0y3Iab0alj
521Please respect copyright.PENANA3X5OtVLegw
而會熱叫的雀仔,有部份能44度支撐20分鐘有多。521Please respect copyright.PENANALOg6ajecR9
521Please respect copyright.PENANAKZ1r4pHgVx
521Please respect copyright.PENANATxNFAtfweh
521Please respect copyright.PENANAoeUUqdj2C9
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。521Please respect copyright.PENANAORgWpwUXKR
521Please respect copyright.PENANAel4EmiLwpR
https://www.youtube.com/watch?v=NggVoJ7mOos521Please respect copyright.PENANALUfjJS9WDr
521Please respect copyright.PENANAAlFDE8VW7B
但並不是所有雀鳥也能這樣做,至少班胸雀鳥沒有這功能。521Please respect copyright.PENANA6pFhfpPECE
521Please respect copyright.PENANAEDPdm7izLl
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。521Please respect copyright.PENANAhxluMyDCyF
521Please respect copyright.PENANAtE8XZXa1E7
至少,懂得熱叫的雀鳥也較抵禦高溫。521Please respect copyright.PENANA85IUQNi8EV
521Please respect copyright.PENANAvM5pkxa8Ck
521Please respect copyright.PENANAMqoH60skgk
521Please respect copyright.PENANAinK83JNp9X
521Please respect copyright.PENANAQysAWjLppY
521Please respect copyright.PENANACmNuSxw4Xs
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。521Please respect copyright.PENANAQOjB8O8GSs
521Please respect copyright.PENANAju2j2MM1YY
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/toc521Please respect copyright.PENANAXcSNrQyEXt
521Please respect copyright.PENANAZATd1wqwfa
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。521Please respect copyright.PENANAopTZzlTAHO
521Please respect copyright.PENANANCdlPfIYG6
Link:521Please respect copyright.PENANAD2O435n1Bh
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio521Please respect copyright.PENANAx6kelC8Zqu
521Please respect copyright.PENANA4sywaBwuKG
521Please respect copyright.PENANAj2VZpXBK01
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。521Please respect copyright.PENANAWbBFfqUzjT
521Please respect copyright.PENANAJbgGLUPgBM
Ref1:https://www.nature.com/articles/s41598-020-75909-6521Please respect copyright.PENANApl4w13a4FD