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Table 2 Osmolality and other constituent values in urine of finless porpoise compared with other cetacean species

From: Concentrations of osmotically related constituents in plasma and urine of finless porpoise (Neophocaena asiaeorientalis): implications for osmoregulatory strategies for marine mammals living in freshwater

Constituents Fin whalea Bottlenose dolphinb Freshwaterc Seawaterd Yangtze population Bohai sea population
      N(n) Mean ± SD N(n) Mean ± SD
Na+ mmol/L 303.0 ± 56.6 490.1 ± 87.9 0.35 470 3 (15) 20.07 ± 8.13 4 (4) 156.95 ± 77.33**
Cl- mmol/L 306.0 ± 57.5 402.7 ± 79.6 0.23 548 3 (15) 13.0 ± 5.38 4 (4) 194.15 ± 76.92**
K+ mmol/L 60.9 ± 21.3 80.7 ± 25.8 0.08 10 3 (16) 65.5 ± 12.14 4 (4) 60.55 ± 12.49
Ca2+ mmol/L - - 0.75 10 3 (16) 2.4 ± 0.72 4 (4) 3.35 ± 2.16
Mg2+ mmol/L 19.4 ± 6.2 - 0.21 54 3 (16) 2.2 ± 0.62 4 (4) 2.21 ± 1.64
Creatinine mmol/L 4.3 ± 3.07 8.5 ± 5.0 - - 3 (16) 2.6 ± 0.89 4 (4) 3.2 ± 1.79
Urea mmol/L 419.0 ± 186.0 703.5 ± 253.9 - - 3 (4) 40.7 ± 15.78 4 (4) 74.96 ± 20.06*
Osmolality mosmol/kg 1040 ± 211.0 1715.7 ± 279.4 - 1,000b 3 (14) 934.6 ± 149.99 4 (4) 1223.75 ± 341.84*
  1. aKjeld2001; bSuzuki et al.2008; cHill et al.1989; dKjeld2003. Significant differences between the finless porpoise are indicated by *P < 0.05 and **P < 0.01. N, individual number; n, sample number.