Report: Menifee Lake Fish Kill Attributed to Toxic Algae
The south end of Menifee Lake was clear of dead fish Friday afternoon -- a week after thousands ...
|The south end of Menifee Lake was clear of dead fish Friday afternoon -- a week after thousands of fish died there.|
Ken Durante has prepared a two-page report of the test findings that is available to Menifee Lakes residents in the lake office and will be included in the next newsletter of the homeowners association in that private community. It describes the presence of Prymnesium Parvum – commonly referred to as golden alga – in the lake.
Menifee 24/7 has viewed the report from Aquatic Consulting & Testing, Inc., the Arizona lab to which water samples were sent last week when several species of fish continued floating dead to the surface (below). According to the report, “golden alga was detected and dominant in the samples tested.”
As described in Durante’s report, golden alga release toxins that affect gill-breathing aquatic organisms. In a bloom situation – which is consistent with current climate and weather conditions – enough toxins are released into the water to kill fish in great numbers.
According to the report, the toxins cause fish gills to lose their ability to exchange water and absorb oxygen. Fish then die of asphyxiation. An algae bloom was traced to April 26 – the day before fish began dying.
Tests of the water showed more than sufficient levels of oxygen in the water, which seemed to disprove a rumor that a newly installed aeration system is faulty. The oxygen level was measured at 10.8 parts per million. Anything above 4.0 ppm is considered safe, acco