科普專欄–薯不揀單 - 深入淺出–非洲大象每日流幾多汗水？

體型龐大的野外非洲大象(Loxodonta africana) ，每日步行接近8-12公里。562Please respect copyright.ＰＥＮＡＮＡh4ixhbGjYf
562Please respect copyright.ＰＥＮＡＮＡsCCTOqKZHn
562Please respect copyright.ＰＥＮＡＮＡu8Ew9rycwy
在非洲的和暖氣候下，行走無可避免會出汗，那麼牠們每日大概會流失多少水份呢？562Please respect copyright.ＰＥＮＡＮＡQo7HLzECNv
562Please respect copyright.ＰＥＮＡＮＡuL0LLPY9tN
562Please respect copyright.ＰＥＮＡＮＡcRehxmfmBf
（圖2）有科學家利用動物園的非洲大象作研究(Ref1)，將D2O注入在麵包裡，讓大象吃下肚裡；562Please respect copyright.ＰＥＮＡＮＡ8YduYitLqp
可以把D2O理解成為被標記的水份，從而可以區分本身沒有被標記的H2O水份。562Please respect copyright.ＰＥＮＡＮＡOOjW6v4Qk7
562Please respect copyright.ＰＥＮＡＮＡugCwNDzCvR
562Please respect copyright.ＰＥＮＡＮＡrNMf8UQyJB
讓D2O透過食物進入大象血液循環系統後，每隔24小時便會進行抽血動作，為期10日，透過量度D2O的流失量計算出水份流失率。562Please respect copyright.ＰＥＮＡＮＡvfftTOpmIw
562Please respect copyright.ＰＥＮＡＮＡVFdgwGgTAX
562Please respect copyright.ＰＥＮＡＮＡglJSCwzA2V
（圖3）最後計算得出，在攝氏25度中，大象每日水份的流失量約為身體重量的12%左右。562Please respect copyright.ＰＥＮＡＮＡKqeNv8KT51
562Please respect copyright.ＰＥＮＡＮＡRi8hbrgSJ1
562Please respect copyright.ＰＥＮＡＮＡeqr1cY4pSR
基於是次研究對象為2000-5000kg的6隻大象，每日水份流失量的平均數為325升，最高可達516升。562Please respect copyright.ＰＥＮＡＮＡAP7IWYjvCG
562Please respect copyright.ＰＥＮＡＮＡiuyJ8elfmg
全球天氣逐漸極端化，野外大象將來能否從野外獲取足夠水份彌補所失水份，將成一大疑問。562Please respect copyright.ＰＥＮＡＮＡWdlouEvEA8
562Please respect copyright.ＰＥＮＡＮＡSNcA5ImiKk
有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。562Please respect copyright.ＰＥＮＡＮＡMqTDZqNBm1
562Please respect copyright.ＰＥＮＡＮＡVWYRzevWLV
https://www.instagram.com/potatopigtongue/562Please respect copyright.ＰＥＮＡＮＡ16uEtLV04O
562Please respect copyright.ＰＥＮＡＮＡBUSwN06MF9
Ref1:https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.201155

ns216.73.216.224da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章