Zoological Studies

Table 1 Plasma osmolality, serum electrolytes, and concentrations of other constituents in the Yangtze and Bohai finless porpoise

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	Yangtze population				Bohai population
	N(n)	Mean ± SD	Range	CV%	N(n)	Mean ± SD	Range	CV%
Osmolality mosmol/kg	21 (21)	329.24 ± 7.06	317.0 to 342.0	2.14	8 (8)	361.5 ± 15.2**	342.0 to 387.0	4.20
Na⁺ mmol/L	22 (22)	153.4 ± 1.71	149.1 to 156.4	1.11	15 (22)	156.24 ± 8.11	147.0 to 175.4	5.19
K⁺ mmol/L	22 (22)	4.5 ± 0.79	3.64 to 7.29	17.56	15 (22)	4.28 ± 0.85	3.4 to 7.3	19.86
Cl^- mmol/L	22 (22)	107.9 ± 3.41	96.80 to 111.70	3.16	15 (22)	117.29 ± 7.63**	106.0 to 131.70	6.50
Ca²⁺ mmol/L	21 (21)	2.62 ± 0.07	2.47 to 2.77	2.67	15 (22)	2.53 ± 0.25	2.1 to 3.11	9.88
Mg²⁺ mmol/L	21 (21)	0.7 ± 0.11	0.54 to 1.01	15.71	15 (15)	0.87 ± 0.15**	0.6 to 1.1	17.24
P³⁺ mmol/L	22 (22)	1.26 ± 0.26	0.89 to 1.93	20.0	15 (15)	1.86 ± 0.61**	0.3 to 3.0	32.80
Creatinine umol/L	22 (22)	81.2 ± 11.67	64.00 to 106.70	14.37	15 (22)	72.48 ± 24.02	41.0 to 125.2	33.14
Urea mmol/L	20 (20)	16.75 ± 3.19*	9.35 to 22.56	19.04	15 (22)	14.35 ± 3.11	9.3 to 18.6	21.67
Glucose mmol/L	20 (20)	7.73 ± 1.17	5.85 to 10.37	15.14	15 (15)	8.31 ± 2.27	3.9 to 11.5	27.32
Uric acid umol/L	22 (22)	44.6 ± 17.14**	22.80 to 84.20	38.43	15 (22)	12.94 ± 7.98	4.3 to 36.0	61.67

Significant differences between the finless porpoises are indicated by *P < 0.05 and **P < 0.01. N, individual number; n, sample number.

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