Test fishing: documented sizes
SLU Aqua has test-fished the water with standardised gillnets (1978–1992). The table shows the largest individuals and the mean length recorded per species.
| Species | Largest recorded | Mean | Year | Number measured |
|---|---|---|---|---|
| Pike | 89.5 cm | 52.9 cm | 1992 | 18 |
| Brown trout | 70 cm | 51.7 cm | 1992 | 3 |
| Burbot | 56 cm | 53.5 cm | 1992 | 2 |
| Perch | 44.5 cm | 15 cm | 1992 | 1,337 |
| Roach | 29 cm | 14.8 cm | 1992 | 409 |
| Vendace | 22 cm | 14.5 cm | 1978 | 417 |
| Smelt | 20 cm | 12 cm | 1992 | 43 |
| Ruffe | 15 cm | 8.7 cm | 1992 | 376 |
| Minnow | 6.5 cm | 6.3 cm | 1992 | 5 |
Source: SLU Aqua · NORS (gillnet test fishing in lakes). Go to provfiske.se for everything on test fishing in Grecken.