| Metric | Site 1 | Site 2 | Site 3 | Site 4 | ||||
| Mesh (in) | 5 × 5 cm | 5 × 10 cm | 5 × 5 cm | 5 × 10 cm | 5 × 5 cm | 5 × 10 cm | 5 × 5 cm | 5 × 10 cm |
| Val % survival | 100 | 100 | 100 | 100 | 100 | 31.3 | 100 | 75 |
| Val % grazed | 0 | 0 | 0 | 0 | 0 | 100 | 0 | 100 |
| Val % coverage | 60 | 50 | 75 | 40 | 40 | 20 | 40 | 20 |
| Volunteers observed | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Hydrilla % coverage | 1 | 5 | 1 | 0 | 0 | 0 | 0 | 0 |
| Najas % coverage | 5 | 5 | 10 | 0 | 0 | 0 | 0 | 0 |
| Chara% coverage | 20 | 5 | 0 | 1 | 0 | 0 | 0 | 0 |
| Sago pondweed % coverage | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 0 |
| Total % coverage | 86 | 65 | 100 | 41 | 40 | 20 | 40 | 20 |