Why Fish Die in Mass In Some Winter Lakes 

This video describes that major factors that lead to winterkill on certain lakes and ponds and which fish species are susceptible to those conditions.
0:00 Intro & Opening
0:21 What is Winterkill?
0:41 How Oxygen Enters Water
2:19 How Oxygen Exits Water
2:36 Winter's Effect on Oxygen Production
3:55 The Balance of Oxygen
4:38 Lakes Susceptible to Winter Kill
5:35 Signs of Winterkill
5:53 Fish Sensitivity to Winterkill

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