| FEED | Group | LSmean | Lower CL | Upper CL | SE | Df |
| DAPHNIA | A | 0.4057 | 0.3707501 | 0.4406499 | 0.01723287 | 36 |
| OMENA | B | 0.3446 | 0.3096501 | 0.3795499 | 0.01723287 | 36 |
| BSF | BC | 0.2995 | 0.2645501 | 0.3344499 | 0.01723287 | 36 |
| DAGAA | C | 0.2919 | 0.2569501 | 0.3268499 | 0.01723287 | 36 |