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Red Tide Mid-Week Update for November 7, 2018
Bloom concentrations of the Florida red tide organism, Karenia brevis, persist on Florida’s Southwest, Northwest, and East coasts. Patchy bloom conditions continue to be observed in each region. Additional details are provided below.
- Over the past week in Southwest Florida, K. brevis was observed in samples spanning Pinellas to Collier counties. Observations of >1,000,000 K. brevis cells per liter (“high” concentrations) occurred in Pinellas, Manatee, Sarasota and Charlotte counties. “Medium” K. brevis concentrations were detected in these same general areas, and in and offshore of northern Lee County. Relative to last week, K. brevisconcentrations generally decreased in Sarasota County and increased in Charlotte County.
- In Northwest Florida over the past week, K. brevis was observed in and/or offshore of Escambia, Santa Rosa, Okaloosa and Gulf counties. “Medium” concentrations were observed in Santa Rosa County and in and offshore of Gulf County.
- Along the Florida East Coast over the past week, K. brevis was observed from Brevard to Broward counties, excluding Indian River County. “Medium” concentrations occurred only in Brevard and Martin counties. Relative to last week, K. brevisconcentrations decreased in parts of Brevard, Indian River, St. Lucie, and Martin counties.
In Southwest Florida, fish kill reports were received for multiple locations in Pinellas, Manatee, and Sarasota counties. In Northwest Florida, fish kills were reported in Escambia, Okaloosa, and Walton counties. Along the East Coast of Florida, fish kills were reported from Indian River and Martin counties, and one was also reported from Brevard County.
Respiratory irritation was reported over the past week in Southwest Florida (in Pinellas, Manatee, and Sarasota counties), Northwest Florida (in Escambia and Okaloosa counties), and on the Florida East Coast (in Brevard County).
Forecasts by the USF-FWC Collaboration for Prediction of Red Tides for Pinellas to Monroe counties predict net southern transport of surface waters, and net southeastern movement of subsurface waters in most areas over the next three days. Three-day forecasts for Escambia to western Gulf counties predict net southeastern surface transport and net northeastern subsurface movement in most areas.