Table 2. Relative reduction of somatic and population growth rate of all D. magna and D. pulex clones on mixtures containing 20% NIVA, 50% NIVA and 10% PCC− as well as specific activity and IC50 values of Daphnia’s chymotrypsins (CT) and trypsins (T).
| Somatic growth rate reduction (%) | Population growth rate reduction (%) | Specific protease activity | IC50 values | ||||||||
| on | on | (nmol/min*µg prot) | (ng/ml) | ||||||||
| Daphnia spp. | Clone | 20% NIVA | 50% NIVA | 10% PCC− | 20% NIVA | 50% NIVA | 10% PCC− | CT | T | CT | T |
| D. pulex | Gerstel | 27.7 | 48.0 | 6.6 | 89.2 | 98.7 | 25.1 | 306.43 | 39.7 | 230.7 | 540.8 |
| D. pulex | NFL3 | 42.6 | 84.6 | 64.9 | 39.4 | 59.4 | 37.6 | 95.18 | 30.2 | 417.5 | 577.6 |
| D. pulex | Gräf | 59.1 | 57.6 | 7.7 | 92.6 | 100.0 | 30.1 | 228.88 | 67.56 | 311 | 1052 |
| D. pulex | Disp14 | 38.6 | 64.0 | 41.2 | 23.7 | 68.9 | 63.4 | 23.45 | 25.4 | 281.1 | 678.6 |
| D. pulex | Povi113 | 42.4 | 86.8 | 45.5 | 36.1 | 92.9 | 45.7 | 38.6 | 21.81 | 228.4 | 803.3 |
| D. pulex | Giev08 | 73.4 | 59.4 | 0.4 | 79.4 | 100.0 | 17.5 | 116.98 | 66.72 | 296.1 | 944.9 |
| D. pulex | TCO | 27.5 | 63.6 | 20.8 | 32.0 | 57.7 | 25.0 | 222.55 | 64.99 | 304.6 | 994 |
| D. magna | F10 | 52.4 | 76.5 | 17.2 | 46.7 | 80.8 | 19.1 | 353.63 | 51.7 | 195 | 388.5 |
| D. magna | G38 | 7.2 | 50.2 | −12.9 | 15.4 | 64.3 | 5.2 | 226.48 | 41.57 | 216.9 | 990.4 |
| D. magna | S15 | 25.2 | 52.2 | 12.1 | 34.2 | 73.8 | 14.6 | 545.09 | 92.53 | 269.3 | 893.3 |
| D. magna | P6 | 17.2 | 43.3 | 18.4 | 17.4 | 26.4 | 15.0 | 385.33 | 50.11 | 251.1 | 587.8 |
| D. magna | P | −1.4 | 39.9 | −9.8 | −0.1 | 53.6 | −10.9 | 358.1 | 43.24 | 244.2 | 1135 |
| D. magna | B | 10.9 | 22.4 | 28.9 | 9.8 | 24.3 | 36.6 | 215.75 | 45.23 | 271.1 | 920.3 |
| D. magna | W | 1.7 | 35.4 | 5.3 | −43.6 | 53.2 | −2.9 | 238.46 | 56.34 | 230.7 | 1222 |