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

Table 2

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

Cation	Concentration (mg L^−1)
	CC0	CC1	CC2	CC3	CC4
Zn	Control	0.040	0.070	0.150	0.770
Cu	Control	0.003	0.005	0.010	0.050
Cd	Control	0.022	0.044	0.088	0.440

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