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Test fishing: documented sizes
SLU Aqua has test-fished the water with standardised gillnets (1970–2024). The table shows the largest individuals and the mean length recorded per species.
| Species | Largest recorded | Mean | Year | Number measured |
|---|---|---|---|---|
| Pike | 106 cm | 58.3 cm | 2010 | 58 |
| Perch | 48.3 cm | 12.7 cm | 2007 | 21,842 |
| Whitefish | 33.8 cm | 13.7 cm | 1980 | 3,350 |
| Roach | 30.8 cm | 15.3 cm | 2023 | 7,026 |
Source: SLU Aqua · NORS (gillnet test fishing in lakes). Go to provfiske.se for everything on test fishing in Fiolen i Alvesta.