{"refrec":{"BRefID":67706,"RR":"<b>Schoffeniels, E.</b> (1991). Sur la signification évolutive de la synthèse de l'urée, de l'acide urique et de la quanine. <i>Cah. Biol. Mar. 32(2)</i>: 221-228. <a href=\"https://dx.doi.org/10.21411/CBM.A.65D2C47B\" target=\"_blank\">https://dx.doi.org/10.21411/CBM.A.65D2C47B</a>","BEntID":328768,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Cah. Biol. Mar. 32(2)</i>: 221-228. <a href=\"https://dx.doi.org/10.21411/CBM.A.65D2C47B\" target=\"_blank\">https://dx.doi.org/10.21411/CBM.A.65D2C47B</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Schoffeniels, E.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Schoffeniels, E.","Englishabstract":"Urea synthesis is the evolutionary response to the passage of aquatic to terrestrial life. It is therefore reasonable to assume that urea as osmotic effector in elasmobranch fishes is a secondary adaptation the meaning of which from the standpoint of energy metabolism is discussed. This situation is compared to that of the arthropods and more specifically to that of Crustacea where amino acids are osmotic effectors quantitatively the most important. 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