SUMMER
WARM
-10 THERMOCLINE
COLD
-20 NO OXYGEN
NO FISH
-30'
1
1
SPRING AND FALL
COLD -10'
-20'
-30'
WINTER
ICE AND SNOW
/
~ ~
2ppm OXYGEN
-10'
-20'
l
NO OXYGEN
'1
NO FISH
lH~s~} J~
-30'
Lake Winona biology, fishing, recreation photographs - Cal Fremling Archive
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