Florida Fish & Wildlife Red Tide Status: Friday, October 21, 2016
FWC released the Red Tide Status Report as of this afternoon.
Florida Fish & Wildlife Conservation Commission red tide bulletin at 3:02 PM 10/21/2016.
Red Tide Status (October 21, 2016)
A patchy bloom of the Florida red tide organism, Karenia brevis, persists in Southwest Florida from Pinellas to Collier counties.
Over the past week, Karenia brevis was observed in background to high concentrations in six samples collected from Pinellas County; background to medium concentrations in thirteen samples collected from Manatee County; very low to high concentrations in thirty-eight samples collected from Sarasota County; very low to low concentrations in six samples collected from Charlotte County; background to medium concentrations in nineteen samples collected from Lee County; and background to high concentrations in seven samples collected from Collier County.
Karenia brevis was observed at background and very low concentrations in two samples collected from Northwest Florida (Bay County), and at background concentrations in one sample collected from Florida’s East Coast (St. Lucie 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, Manatee, Sarasota, and Collier counties over the past week; respiratory irritation was reported at Barefoot Beach (Collier County) on 10/16, Gasparilla Island (Lee County) on 10/19, and Manatee Beach (Manatee County) on 10/21. 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 Collier 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.