Record temperatures recorded throughout the US this summer are resulting in fatal conditions for many freshwater fish. As water temperatures go up, oxygen saturation goes down, making it difficult for fish, especially larger ones, to breath. In some areas of the Midwest river and lake temperatures have been at or above 100oF (38 oC). The high temperatures are blamed for many fish kills and economic losses. In Iowa, for example, 37,000 sturgeon worth $10 million were recently found dead due to water temperatures that was 97oF.
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