Red Tide boosts manatee deaths
ST. PETERSBURG, Fla. — The number of manatee deaths in Florida this year has already exceeded the total for all of 2017.
Blame Red Tide, which is suspected of killing more than 100 of them.
So far, 554 manatees have died in 2018, with four months left to go. Last year’s total was 538.
As of Aug. 18, the most recent date for the running total, the Red Tide bloom had been verified as the cause of death for 29 manatees, and was suspected of killing another 74. That makes a total of 103 that appear to have fallen prey to the lingering toxic algae.
Most of the suspected or confirmed Red Tide victims were found dead in Charlotte, Lee and Collier counties, but one recently turned up floating in Terra Ceia Bay in Manatee County.
“We find that the primary route is through ingestion of seagrass that has the toxins on it,” Dr. Martine de Wit of the state’s marine mammal pathology laboratory in St. Petersburg said Monday.
Other factors are at play as well, De Wit said. A big cold snap early in the year proved deadly for manatees, and the number of manatees killed by speeding boats is above the five-year average, she said. The number killed by boats so far in 2018 is 81.
Other variables, she said, include population size and location. For each of the past four years, biologists have counted more than 6,000 manatees swimming in Florida’s waterways.
“Numbers like these also have to be taken into context with the possibly increasing size of the manatee population and local abundance variations from year to year,” she explained. “If more manatees hang out in more urban areas, one can assume that more carcasses will be found as opposed to years where they may get unnoticed.”
Save the Manatee Club president Pat Rose said this is part of a pattern that his group predicted last year when the U.S. Fish and Wildlife Service decided manatees should not be listed as endangered any more.
“The Fish and Wildlife Service said all this was under control, and it’s being shown that it’s not under control,” Rose said.
He predicted that it would be “really hard” for manatees to recover from what Red Tide has been doing to them this year.
“Florida’s manatees have no defense against this ecological disaster,” said Jeff Ruch, executive director of the environmental group Public Employees for Environmental Responsibility, which blames Gov. Rick Scott for weakening the state’s water quality requirements and monitoring. Scott blames Sen. Bill Nelson, his Democratic rival in the Senate race, for not doing something before now to stop the recurring algae bloom.