體型龐大的野外非洲大象(Loxodonta africana) ,每日步行接近8-12公里。615Please respect copyright.PENANAkRywe3BRDm615Please respect copyright.PENANAAcoX0M6wdS
615Please respect copyright.PENANAZOibsO2jQc
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?615Please respect copyright.PENANAQhj7MIsEY2
615Please respect copyright.PENANA5kBNDoghQl
615Please respect copyright.PENANAcJow52c6my
(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;615Please respect copyright.PENANAcfKeRQiH6p
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。615Please respect copyright.PENANA9aPahlTkhG615Please respect copyright.PENANAg2aeP48lXW
615Please respect copyright.PENANA2UEkeKFjw5
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。615Please respect copyright.PENANAY2Q75X3WrJ
615Please respect copyright.PENANAHeu8C3XEPS
615Please respect copyright.PENANA0FdpUkkM8W
(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。615Please respect copyright.PENANAOLk5Y8Iys9615Please respect copyright.PENANAD3AKDIyFOh
615Please respect copyright.PENANAabPJ2nZwLZ
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。615Please respect copyright.PENANA3Yxybh3QrA
615Please respect copyright.PENANAjE7lmGht8i
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。615Please respect copyright.PENANAQURxHWg8sO
615Please respect copyright.PENANAa6y3FMwraZ
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。615Please respect copyright.PENANAyrPCpVQSSX
615Please respect copyright.PENANAWQWBT43Pqe
https://www.instagram.com/potatopigtongue/615Please respect copyright.PENANAFgFu204qr0
615Please respect copyright.PENANAtuKDSkClAv
Ref1:https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.201155
00
ns216.73.216.228da2