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

SpringerPlus

Table 2 Effects of low salinity (18 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 × 10^6a	0.087 ± 0.004^b
1.5 h	195.09 ± 14.79^bcd	26.80 ± 0.16^b	108.55 ± 1.15^b	1.42 ± 0.12 × 10^6d	0.115 ± 0.013^a
3 h	182.24 ± 12.53^bc	25.26 ± 0.11^c	99.63 ± 0.74^c	2.04 ± 0.08 × 10^6b	0.061 ± 0.002^c
6 h	117.49 ± 7.19^a	22.75 ± 0.23^d	98.84 ± 0.76^c	1.69 ± 0.12 × 10^6bcd	0.063 ± 0.004^bc
12 h	184.51 ± 7.19^bc	3.31 ± 0.10^f	85.09 ± 0.23^d	1.51 ± 0.14 × 10^6cd	0.062 ± 0.005^bc
24 h	171.50 ± 14.23^b	3.13 ± 0.06^f	79.57 ± 0.61^e	1.93 ± 0.25 × 10^6bc	0.073 ± 0.012^c
48 h	128.55 ± 14.22^a	3.71 ± 0.05^e	76.27 ± 0.12^f	2.11 ± 0.10 × 10^6b	0.096 ± 0.021^b

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