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

Table 6

The survival rate and specific growth rate of Apostichopus japonicus exposed to various concentrations of Zn, Cu, and Cd for 15 days. Different letters indicate significant differences (P < 0.05).

Cations	Concentration (mg L^−1)	Survival rate (%)	Initial wet weight (g)	Final wet weight (g)	Specific growth rate (% d^−1)
Zn	Control	100	16.36 ± 0.25	21.32 ± 0.23	21.64 ± 1.75
	0.040	100	15.58 ± 0.15	19.30 ± 0.25	16.67 ± 1.29
	0.070	100	15.74 ± 0.45	18.02 ± 0.61	10.66 ± 1.45
	0.150	100	16.12 ± 0.52	16.98 ± 0.60	4.18 ± 0.38
	0.770	58.30	16.48 ± 0.33	13.07 ± 0.52	−19.15 ± 1.73
Cu	Control	100	16.36 ± 0.25	21.32 ± 0.23	21.64 ± 1.75
	0.003	100	15.95 ± 0.04	19.05 ± 0.63	14.11 ± 2.76
	0.005	100	16.18 ± 0.11	18.30 ± 0.32	9.94 ± 2.33
	0.010	100	15.75 ± 0.37	17.72 ± 0.68	9.26 ± 1.62
	0.050	75.00	16.88 ± 0.09	14.31 ± 0.31	−13.94 ± 1.52
Cd	Control	100	16.36 ± 0.25	21.32 ± 0.23	21.64 ± 1.75
	0.022	100	16.64 ± 0.26	20.82 ± 0.64	18.63 ± 1.55
	0.044	100	16.67 ± 0.27	19.27 ± 0.63	12.09 ± 2.16
	0.088	100	15.94 ± 0.2	17.97 ± 0.41	9.53 ± 2.65
	0.440	83.30	16.05 ± 0.1	13.23 ± 0.11	−15.51 ± 1.26