Fig. 4. Notaden nichollsi. (A) Total osmotic concentration of the plasma and urine of control (plasma N=7, urine N=5) and aestivating individuals excavated from sand dunes in 2003 (plasma N=7, urine N=8) and 2004 (plasma N=10, urine N=5). ^* indicates significant difference between plasma and urine osmolalities (one-tail t-test, P<0.05). (B) Relationship between plasma and urine osmolality for controls and frogs excavated from sand dunes in 2003 and 2004. The broken line represents isosmolality.