Table 3 Concentrations of dispersants that inhibited the metamorphosis success of A. millepora larvae by 50% and 10% (EC50 and EC10), over three exposure periods and calculated from concentration-response curves presented in Fig. 2. 95% confidence intervals in parentheses. F-test results demonstrating the significant effect of exposure duration on EC50 values. PC95 = 95% species protection values (=HC5) derived from species sensitivity distributions for Ardrox, Slickgone LTSW, Slickgone NS, Finasol36 and Corexit EC9500A37.
From: Comparative toxicity of five dispersants to coral larvae
Dispersant | EC50 (mg l−1) | EC10 (mg l−1) | P | PC95 (mg l−1) | ||||
|---|---|---|---|---|---|---|---|---|
2 h | 6 h | 24 h | 2 h | 6 h | 24 h | F(df) | (No. species) | |
Ardrox 6120 | 12.8 | 5.3 | 4.0 | 8.9 | 2.6 | 1.9 | <0.0001 | 0.013 |
(11.8–14.4) | (4.8–5.9) | (3.6–4.3) | (8.0–9.9) | (2.1–3.2) | (1.6–2.3) | 157 (2, 138) | (3) | |
Corexit C9500A | 14.0 | 7.7 | 4.0 | 8.9 | 3.5 | 2.5 | <0.0001 | 6.6 |
(13.0–15.1) | (6.8–8.6) | (3.7–4.3) | (8.0–10.1) | (2.8–4.5) | (2.2–3.0) | 196 (2, 138) | (18) | |
Slickgone LTSW | 7.5 | 4.1 | 2.6 | 4.4 | 1.7 | 1.6 | <0.0001 | 0.017 |
(6.8–8.2) | (3.3–5.1) | (2.5–2.8) | (3.8–5.2) | (1.1–2.5) | (1.4–1.8) | 80.1 (2, 138) | (4) | |
Slickgone NS | 26.4 | 15.4 | 11.1 | 12.9 | 8.8 | 5.6 | <0.0001 | 0.1 |
(22.7–30.9) | (13.1–17.7) | (10.0–12.5) | (9.9–17.1) | (6.9–11.5) | (4.5–7.1) | 37.2 (2, 138) | (7) | |
Finasol OSR 52 | 8.6 | 4.6 | 3.4 | 5.9 | 2.4 | 1.9 | <0.0001 | 0.13 |
(7.5–9.3) | (4.1–5.1) | (3.2–3.6) | (4.7–7.4) | (1.9–3.0) | (1.7–2.1) | 122 (2, 138) | (7) | |
SDS | 4.9 | 1.8 | 0.77 | 2.7 | 0.91 | 0.35 | <0.0001 | — |
(4.4–5.4) | (1.7–1.9) | (0.48–0.95) | (2.1–3.4) | (0.80–1.0) | (0.20–0.65) | 195 (2, 135) | ||
