Florida Fish & Wildlife Red Tide Status: Friday, November 25, 2016
FWC released the Red Tide Status Report Wednesday afternoon, ahead of the Thanksgiving Holiday.
Florida Fish & Wildlife Conservation Commission red tide bulletin at 3:37 PM 11/23/2016.
Red Tide Status (November 23, 2016)
A bloom of the Florida red tide organism, Karenia brevis, persists in Southwest Florida from southern Pinellas to northern Monroe County.
Karenia brevis was observed in very low to low concentrations in five samples collected from Pinellas County; low concentrations in one sample collected from Hillsborough County; background to medium concentrations in seven samples collected from Manatee County; medium to high concentrations in ten samples collected from Sarasota County; medium to high concentrations in nineteen samples collected from Charlotte County; background to high concentrations in sixteen samples collected from Lee County; background to very low concentrations in nine samples collected from Collier County; and very low to medium concentrations in seven samples collected from Monroe County.
Additional samples collected throughout Florida over the past week did not contain K. brevis.
Fish kills affecting multiple species have been reported along Pinellas, Charlotte, Lee, Collier, and northern Monroe counties over the past week. Slight respiratory irritation has also been reported in some areas of Sarasota and Lee counties. Forecasts for Southwest Florida by the USF-FWC Collaboration for Prediction of Red Tides show net southern movement of surface waters, and southern, onshore movement of subsurface waters between southern Pinellas and northern Monroe counties over the next 3 days.
Red tide is a naturally-occurring microscopic alga that has been documented along Florida’s Gulf Coast since the 1840’s and occurs nearly every year. Blooms, or higher-than-normal concentrations, of the Florida red tide alga, Karenia brevis, frequently occur in the Gulf of Mexico at this time of year (late summer or early fall). Red tide begins in the Gulf of Mexico 10 to 40 miles offshore and can be transported inshore by winds and currents.”
Key for Results
|Description||Karenia breviscells/liter||Possible Effects (K. brevis only)|
|NOT PRESENT – BACKGROUND||background levels of 1,000 cells or less||None anticipated|
|VERY LOW||>1,000 to 10,000||Possible respiratory irritation; shellfish harvesting closures > 5,000 cells/L|
|LOW||>10,000 to 100,000||Respiratory irritation, possible fish kills and bloom chlorophyll probably detected by satellites at upper limits|
|MEDIUM||>100,000 to 1,000,000||Respiratory irritation and probable fish kills|
|HIGH||>1,000,000||As above plus discoloration|
For more information, please see FWC.