"Geochelone denticulata, feature a very different urinary biochemistry than do species from more arid environments such as Testudo graeca. In the former the ratio of excreted uric acid to ammonia is 6.7:6.00 and in the latter it is 51.9:4.1 " http://www.tortoisetrust.org/articles/drink.html
美國陸龜研究基金的文章列明
黃腿象龜制造的 尿酸:阿摩尼亞 比例為 7 : 6
黃金歐陸制造的 尿酸:阿摩尼亞 比例為 52 : 4
"Uric Acid and Urea Excretion in the Tuatara Sphenodon punctatus
W. H. DAWBIN & L. HILL
School of Biological Sciences, University of Sydney, Sydney, New South Wales.
QUALITATIVE tests have shown that the only surviving member of the reptile family Rhynchocephalia, the tuatara, excretes both urea and uric acid. Snakes (Squamata) eliminate nitrogen principally in the form of uric acid, while the Crocodilia excrete uric acid and ammonia. Some chelonians (turtles and tortoises) excrete uric acid, others excrete urea or ammonia and a few can change from one to the other." http://www.nature.com/nature/jou ... /abs/2241325a0.html