體型龐大的野外非洲大象(Loxodonta africana) ,每日步行接近8-12公里。618Please respect copyright.PENANANjLOghKRvU618Please respect copyright.PENANAihlALoSCUB
618Please respect copyright.PENANAAl6eLpue3E
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?618Please respect copyright.PENANA1yfx5A2omL
618Please respect copyright.PENANAKHAPFdyRqK
618Please respect copyright.PENANA1brR5Cr2gV
(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;618Please respect copyright.PENANAxEeb5ycsTN
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。618Please respect copyright.PENANAWUw7GAc4c6618Please respect copyright.PENANAWcil3kMrlX
618Please respect copyright.PENANAGR6fPgznaq
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。618Please respect copyright.PENANA0phzIlaGoo
618Please respect copyright.PENANAI6vLxK0VCr
618Please respect copyright.PENANANyG4rC3H8g
(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。618Please respect copyright.PENANAfkVuxIhLMW618Please respect copyright.PENANAtK7WYh5M04
618Please respect copyright.PENANAYuOc5mA1D2
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。618Please respect copyright.PENANAav0w19OPx4
618Please respect copyright.PENANAmsXKcuRw2o
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。618Please respect copyright.PENANANBmnAim1w3
618Please respect copyright.PENANAzdGRd9Rnl3
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。618Please respect copyright.PENANAqMPjyDf5Oj
618Please respect copyright.PENANAVOVNJfFwBo
https://www.instagram.com/potatopigtongue/618Please respect copyright.PENANAD4i6QS4BUR
618Please respect copyright.PENANAoj6ETtfmiZ
Ref1:https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.201155
00
ns216.73.216.247da2