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Knivsjön

northern acidified brown forest lake · 65°N
Real lakereal shoreline3 species on recordsources & method
clarity 1.6 mmax depth 11 mpH 4.9oligotrophic · humicstatus unsatisfactorypaved road

Character of the water

Knivsjön lies in the cold north — a northern acidified brown forest lake. The tea-stained, humic water hides the bottom within an arm's length. In summer a thermocline settles around 6 m and splits the lake into two worlds. Acidification has thinned life down to the hardiest few.

The surroundings

The lake sits close to town with a road right up to it — easy to reach, but hard-fished and exposed to nutrient runoff from the buildings and fields all around.

Moderately deep (11 m) — shallow bays, the odd reef and a deeper channel through the middle.

Permits & rules

Fishing permit required — Knivsjön FVOF. Day permit ~100 kr · annual permit ~500 kr.

  • Pike: keep at most one over 75 cm per day.
  • Handheld tackle only. Respect the protected zones at the inlets and outlets.

Species in Knivsjön

perch predatory fish
typically ~22 cm · can reach 45 cm
Perch grazes the rich water in schools — where there's one, there are more.
pike predatory fish
typically ~62 cm · can reach 120 cm
In the murky light, pike shadows the baitfish and hits in short rushes.
roach coarse fish
typically ~18 cm · can reach 32 cm
Roach grazes the rich water in schools — where there's one, there are more.

Fishing Knivsjön

perch and pike sit at the top of the food chain in Knivsjön, carried by roach. The brown, humic water keeps visibility short — the fishing is more about vibration than sight.

The fishing here follows the water's own rhythm: dawn and dusk have their windows, fronts close and open them, and the season moves the fish. No two sessions at Knivsjön are alike.

General rules of thumb for this kind of water

  • Brown, humic water dampens the light — fishing can be good even in the middle of the day.
  • Acidified water yields few, hardy species.

The catch board

6 anglers · 12 catches
  1. 1Tomas Ekpike53 cm
  2. 2Jürgen Falkpike50 cm
  3. 3Elin Nieminenpike49 cm
  4. 4Rickard Åbergperch18 cm
  5. 5Andreas Petterssonroach16 cm
  6. 6Karl Boströmroach15 cm
Species records here
pike53 cmTomas Ek
perch18 cmRickard Åberg
roach15 cmKarl Boström
The same water, for real