Table 21.
Calculated EP50 values (and 95% confidence limits) for aquatic arthropods and the exposure profile corresponding with the ETO‐RAC (based on Effect class 2 concentration of 0.1 μg/L) derived from the experimental pond study by using the GUTS‐RED‐SD and GUTS‐RED‐IT models as well as the corresponding HP5 values (and 95% confidence limits)
| EP50 values corresponding to exposure profile of 0.1 μg/L treatment | EP50 values corresponding to exposure profile of 0.1 μg/L treatment divided by an AF of 2 (liberal ETO‐RAC option) | EP50 values corresponding to exposure profile of 0.1 μg/L treatment divided by an AF of 3 (conservative ETO‐RAC option) | ||||
|---|---|---|---|---|---|---|
| Species | GUTS‐RED‐SD | GUTS‐RED‐IT | GUTS‐RED‐SD | GUTS‐RED‐IT | GUTS‐RED‐SD | GUTS‐RED‐IT |
| Daphnia magna | 0.5 (0.3–2.9) | 3.7 (3.0–4.6) | 1.0 (0.7–5.8) | 7.3 (6.0–9.3) | 1.5 (0.9–8.8) | 11.0 (8.9–13.7) |
| Asellus aquaticus | 36.6 (9.9–88.1) | 46.4 (40.6–63.3) | 73.2 (19.5–17.4) | 92.8 (78.3–134) | 110 (29.2–264) | 139 (120–209) |
| Gammarus pulex | 1.4 (0.2–2.5) | 2.1 (1.6–4.0) | 2.9 (0.5–5.3) | 4.1 (3.3–8.0) | 4.3 (0.5–7.7) | 6.1 (5.0–11.8) |
| Neocaridina denticulata | 1,484 (928–3,850) | 1,563 (1,257–2,832) | 2,969 (1,856–7,857) | 3,125 (2,539–5,859) | 4,375 (3,008–11,758) | 4,688 (3,516–8,345) |
| Procambarus spec. | 20.8 (11.6–24.6) | 17.1 (13.4–23.2) | 41.5 (23.3–52.3) | 34.2 (28.0–51.3) | 61.0 (33.6–75.5) | 51.3 (41.7–76.9) |
| Chironomus riparius | 5.5 (3.6–7.9) | 3.4 (2.7–4.4) | 11.0 (7.6–15.5) | 6.7 (5.5–8.4) | 16.5 (10.3–22.5) | 10.1 (8.2–13.8) |
| Anax imperator | 39.4 (36.3–42.1) | 42.4 (30.5–48.7) | 78.7 (70.1–83.7) | 84.8 (65.0–95.4) | 117 (107–127) | 127 (82.8–149) |
| Cloeon dipterum | 6.7 (3.6–8.6) | 5.0 (4.6–6.3) | 13,4 (7.2–17.4) | 10.1 (9.4–12.6) | 20.1 (10.8–26.8) | 15.3 (13.9–19.3) |
| Notonecta maculata | 53.4 (32.5–88.9) | 58.0 (54.4–70.0) | 107 (65.5–179) | 116 (109–138) | 160 (96.1–27.1) | 175 (163–224) |
| Paraponyx stratiotata | 47.3 (47.0–52.0) | 48.8 (42.7–73.2) | 94.6 (93.0–104) | 97.7 (85.6–146) | 143 (141–153) | 146 (128–215) |
| Plea minutissima | 35.4 (24.1–41.8) | 20.8 (17.9–39.9) | 70.8 (46.7–84.1) | 41.5 (35.7–77.7) | 106 (71.3–124) | 62.3 (54.5–109) |
| Ranatra linearis | 115 (86.7–151) | 63.5 (53.5–115) | 231 (163–304) | 127 (111–234) | 349 (248–447) | 190 (167–333) |
| Sialis lutaria | 4.8 (3.1–10.4) | 8.1 (6.6–10.6) | 9.7 (4.3–21.5) | 16.2 (12.1–20.2) | 14.5 (6.3–32.2) | 24.4 (18.3–33.6) |
| Median HP 5 log‐normal (95% confidence interval) | 0.88 (0.26–4.6) | 1.4 (0.26–4.6) | 1.8 (0.54–9.9) | 2.8 (1.2–11) | 2.5 (0.65–14) | 4.4 (1.8–17) |