Fig. 3. Muscle urea content (µmol g1) with the total
methylamine and ß-amino acid (non-urea osmolytes) contents (µmol
g1) in marine, euryhaline species in freshwater (FW) and
freshwater elasmobranchs. Values are mean ± s.e.m. and N=6
(C. punctatum), 4 (L. ocellata), 4 (L. erincea), 6
(T. lymma), 5 (D. sabina), 5 (methylamines) and 7
(ß-amino acids) in H. signifer acclimated to 50% seawater, 9
(methylamines) and 10 (ß-amino acids) in H. signifer acclimated
to freshwater, 5 (methylamines) and 7 (ß-amino acids) in P.
motoro.