Effect of acute salinity stress on ion homeostasis, Na+/K+-ATPase and histological structure in sea cucumber Apostichopus japonicus

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Table 3 Effects of high salinity (40 psu) on the variations of physiological indexes of A. japonicus

Times/indexes	Na⁺ (mmol L⁻¹)	K⁺ (mmol L⁻¹)	Cl⁻ (mmol L⁻¹)	Total counts of coelomocytes (cells mL⁻¹)	The phagocytosis of coelomocytes
Control (32 psu)	130.64 ± 1.59^a	28.91 ± 0.25^a	111.81 ± 0.24^a	3.43 ± 0.17 × 10^6c	0.087 ± 0.004^b
1.5 h	187.10 ± 3.98^bc	9.43 ± 0.16^b	54.43 ± 0.19^c	1.33 ± 0.03 × 10^7e	0.067 ± 0.002^a
3 h	200.08 ± 5.09^bcd	8.51 ± 0.08 ^cd	54.89 ± 0.36^c	1.73 ± 0.13 × 10^6a	0.065 ± 0.001^a
6 h	219.72 ± 4.74^d	8.25 ± 0.06^d	55.83 ± 0.23^bc	2.70 ± 0.14 × 10^6b	0.070 ± 0.002^a
12 h	194.54 ± 6.70^bcd	8.86 ± 0.05^c	55.34 ± 0.31^c	5.37 ± 0.15 × 10^6d	0.067 ± 0.001^a
24 h	207.55 ± 12.21 ^cd	8.86 ± 0.09^c	55.31 ± 0.11^c	5.04 ± 0.25 × 10^6d	0.067 ± 0.001^a
48 h	251.19 ± 3.49^e	8.61 ± 0.01 ^cd	56.89 ± 0.26^b	4.73 ± 0.27 × 10^6d	0.122 ± 0.004^c

Within rows, different superscript letters indicate significant differences (P < 0.05). Values are mean ± SE (n = 3)