體型龐大的野外非洲大象(Loxodonta africana) ,每日步行接近8-12公里。614Please respect copyright.PENANAt0pPvda928614Please respect copyright.PENANASiRxIanfCw
614Please respect copyright.PENANAmxWgpIP6Nz
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?614Please respect copyright.PENANALVOJHIzxEy
614Please respect copyright.PENANA7FF1LIofXJ
614Please respect copyright.PENANAubEoYcWK7j
(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;614Please respect copyright.PENANAjR8O59AM5v
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。614Please respect copyright.PENANAZk6Zdbwmzo614Please respect copyright.PENANAuUohlBqaFX
614Please respect copyright.PENANAv40wzMn6sr
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。614Please respect copyright.PENANAHitjV2hLPD
614Please respect copyright.PENANAVwWvYkH4G8
614Please respect copyright.PENANA1m5ulotSEF
(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。614Please respect copyright.PENANAvP7P8oiGba614Please respect copyright.PENANA0ZOEJaAr0L
614Please respect copyright.PENANAQ0KaoHGLEP
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。614Please respect copyright.PENANA8BiY7W8WCr
614Please respect copyright.PENANACg88yZRXKb
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。614Please respect copyright.PENANAxbJWI2yozJ
614Please respect copyright.PENANALP6JCcB9DJ
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。614Please respect copyright.PENANAj5O19KPcKj
614Please respect copyright.PENANAIRMocCxhT5
https://www.instagram.com/potatopigtongue/614Please respect copyright.PENANAcdFbz7Sbt5
614Please respect copyright.PENANAs5Slu9oAs8
Ref1:https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.201155
00
ns216.73.216.251da2