(前排生病,測試咗唔係武肺。現在正常更番。)523Please respect copyright.PENANA851aIbjXMF
523Please respect copyright.PENANA16nhuNeOX8
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。523Please respect copyright.PENANAWR4E9wTUbH
523Please respect copyright.PENANA12gGyXuGNl
523Please respect copyright.PENANAsKVPL34z1G
(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。523Please respect copyright.PENANADcBdPpC36N523Please respect copyright.PENANArk28bElAED
523Please respect copyright.PENANAPUjlkCM79M
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」。523Please respect copyright.PENANAThqFfgVmSc
523Please respect copyright.PENANAeBuUX3wp3x
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。523Please respect copyright.PENANABqgQtkedPZ
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。523Please respect copyright.PENANAADDmKVDBpa
而當溫度達40度的時候,雀鳥們會開始熱叫。523Please respect copyright.PENANAZ6Af3OXMQS
523Please respect copyright.PENANA0jlt4hi16w
523Please respect copyright.PENANAYVSFacq4st
(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。523Please respect copyright.PENANA9mmNt4Tp6h523Please respect copyright.PENANAr0UOcPhdO2
523Please respect copyright.PENANAfMfQ6DZXgz
而會熱叫的雀仔,有部份能44度支撐20分鐘有多。523Please respect copyright.PENANA1dxr1pMpNN
523Please respect copyright.PENANAfvCuOx3yY7
523Please respect copyright.PENANAVHES2tsAwO
523Please respect copyright.PENANAqJ58I10KKl
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。523Please respect copyright.PENANAc9myIxZQLU
523Please respect copyright.PENANAMmc0rpCCoA
https://www.youtube.com/watch?v=NggVoJ7mOos523Please respect copyright.PENANA89rJh72Rc4
523Please respect copyright.PENANAat96wM0sol
但並不是所有雀鳥也能這樣做,至少班胸雀鳥沒有這功能。523Please respect copyright.PENANA5pSmND9viS
523Please respect copyright.PENANAmiGoVuWlfc
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。523Please respect copyright.PENANAlqSquKYjOX
523Please respect copyright.PENANAwfr6C66aGg
至少,懂得熱叫的雀鳥也較抵禦高溫。523Please respect copyright.PENANAbLOyPJGEsZ
523Please respect copyright.PENANAFFoXJRTenw
523Please respect copyright.PENANAoY5SVbYdiZ
523Please respect copyright.PENANAxZ2zzhIvgu
523Please respect copyright.PENANAXRj4BDpy0G
523Please respect copyright.PENANANIsh6fzLts
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。523Please respect copyright.PENANA8cuKcCjAZk
523Please respect copyright.PENANAJuiQAGLpZe
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/toc523Please respect copyright.PENANAmk6KjxKEQK
523Please respect copyright.PENANA09uqbSLNYK
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。523Please respect copyright.PENANAs278QzRBIs
523Please respect copyright.PENANAKDq502Mxd5
Link:523Please respect copyright.PENANAMGkmaktmeH
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio523Please respect copyright.PENANA5jzNfPgPxC
523Please respect copyright.PENANAndu9VxVPYp
523Please respect copyright.PENANAfBBuLOP3xz
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。523Please respect copyright.PENANAwq8uUtFiTl
523Please respect copyright.PENANA4QzlgU0FWl
Ref1:https://www.nature.com/articles/s41598-020-75909-6523Please respect copyright.PENANASAAC627O5i
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline 資料
-
toc 目錄
-
share 分享
-
format_color_text 介面設置
-
exposure_plus_1 推薦
-
打賞
-
report_problem 檢舉
-
account_circle 登入
X
科普專欄–薯不揀單
作者:
薯仔聞茱莉

篇 #191
三十秒科學–在沙漠生活的雀鳥
喜歡 1
閱讀 519
書籤 150
campaign
催更 0
打賞

按此加載下一章
X
每次催更後,作者都會收到通知!
smartphone100 → 催更
×
寫下你喜歡這個故事的地方
×
對此喜歡的人