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Test fishing: documented sizes
SLU Aqua has test-fished the water with standardised gillnets (1990–2023). The table shows the largest individuals and the mean length recorded per species.
| Species | Largest recorded | Mean | Year | Number measured |
|---|---|---|---|---|
| Pike | 115 cm | 51 cm | 2014 | 249 |
| Salmon | 90 cm | 46.7 cm | 2021 | 7 |
| Brown trout | 89 cm | 67.6 cm | 2011 | 7 |
| Burbot | 80 cm | 44.7 cm | 2011 | 1,856 |
| Eel | 80 cm | 71.9 cm | 2015 | 5 |
| Zander | 71 cm | 23.9 cm | 2021 | 4,460 |
| Asp | 62.5 cm | 33.6 cm | 2004 | 111 |
| Whitefish | 60.4 cm | 30.2 cm | 2024 | 5,909 |
| Bream | 56 cm | 18.5 cm | 2011 | 8,416 |
| Tench | 55.2 cm | 40.5 cm | 2011 | 55 |
| Ide | 52 cm | 36.2 cm | 1995 | 27 |
| Perch | 46.2 cm | 14.4 cm | 2011 | 59,445 |
| Roach | 40 cm | 12.8 cm | 2008 | 41,021 |
| Rudd | 39.1 cm | 20.5 cm | 2018 | 340 |
| Rainbow trout | 38.6 cm | 38.6 cm | 1990 | 1 |
| Silver bream | 38.3 cm | 15.1 cm | 2018 | 15,934 |
| Crucian carp | 37.5 cm | 37.5 cm | 2011 | 1 |
| Smelt | 34.5 cm | 17.6 cm | 2011 | 15,812 |
| Dace | 29 cm | 19.4 cm | 1995 | 109 |
| Vendace | 27.1 cm | 15.1 cm | 2015 | 2,544 |
| Ruffe | 21 cm | 9.2 cm | 2021 | 27,318 |
| Bleak | 20.3 cm | 10.3 cm | 2007 | 8,967 |
| Minnow | 8 cm | 6.3 cm | 2011 | 45 |
| Bullhead | 7 cm | 5.4 cm | 2010 | 9 |
Source: SLU Aqua · NORS (gillnet test fishing in lakes). Go to provfiske.se for everything on test fishing in Vänern.