Effects of Acute and Chronic Heavy Metal (Cu, Cd, and Zn) Exposure on Sea Cucumbers (Apostichopus japonicus)

Table 1

The experimental design and nominal concentrations of Zn, Cu, and Cd in acute toxicity experiment test.

Cation	Concentration (mg L^−1)
	CA0	CA1	CA2	CA3	CA4	CA5	CA6
Zn	Control	1.00	1.43	2.05	2.94	4.21	6.00
Cu	Control	0.02	0.03	0.05	0.08	0.13	0.20
Cd	Control	0.50	0.66	0.87	1.15	1.51	2.00

Note: comparison was conducted among different concentration groups within each metal.