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Common Aquatic Bacteria Responsible for Fish Kill
Test results from fish sampling suggest the recent Spofford Lake fish kill resulted from the presence of a common aquatic bacteria combined with a time of year when fish were stressed from spawning activity and war water temperatures.

Test results showed that no virus was present in the fish tested and that the bacteria found was Aeromonas Hydrophila. According to Fish Health Center Staff, this bacteria only becomes lethal to fish when there is another stressor to the fish. In some cases, the bacteria can infect a single fish and then multiply rapidly, causing a substantial fish kill.

Fish kills occur naturally in waterbodies from time to time, according to New Hampshire Fish and Game Department biologist, although they typically involve fewer fish.

 
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Delavan Lake Dredging Clears Natural Filter - In the late 1980s, Delavan Lake turned into an algae soup by mid-summer that discouraged swimming, clogged boat motors and killed off game fish. Farm and residential development around the lake poured nutrient-rich runoff into the watershed and into the lake. Those nutrients fed the algae blooms. Today, a project to redredge the channel in the narrow inlet which was designed to store and collect the sediment flowing into it before it reaches the open water.


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