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Wilderness & Resources

12.5% of all Florida manatees killed in 2009

As many as 419 manatees have been found dead since Jan. 1, the highest number on record for a calendar year.

By Bryan NelsonMon, Dec 21 2009 at 8:09 PM EST
 3

GENTLE GIANTS: Most of the endangered manates found dead this year were killed by boats. (Photo: flickkerphotos/Flickr)
The decade will end on a low note for conservationists working to protect Florida's endangered population of manatees, as the Florida Fish and Wildlife Conservation Commission's Fish and Wildlife Research Institute documented 419 manatee carcasses in state waters so far this year, the most for any year since record-keeping began in 1974.
 
That number accounts for 12.5 percent of the entire population, clearly an unsustainable rate. Most of the deaths could be directly attributed to human causes, with boat strikes constituting as much as 30 percent of the fatalities, which alone is three times greater than natural causes.
 
One of the reasons that manatees are so slow and docile is that they have no natural predators, which means that their biggest threat comes from human development. Aside from boat strikes, manatees are routinely crushed or drowned in canal locks, hurt and entangled by fishing line and hooks, and they are highly vulnerable to deadly blooms of "red tide" algae.
 
Meanwhile, most of the natural deaths this year were blamed on colder than average waters, leading to a high mortality rate among infant manatees.
 
Aside from the bad news at the end of this decade, the overall manatee population is believed to have increased slightly over the last several decades, with a reasonably stable population of just over 3,500. But developers and the boating industry have been lobbying for looser restrictions in recent years, which could continue to threaten the conservation of these subtly charismatic mammals in years to come.
 
To report a dead or distressed manatee, you can call the FWC Wildlife Alert Hotline at 888-404-FWCC (3922).
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Related Topics: Animal Research, Conservation, Endangered Species, Nature

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anonymous
Jim S 01/02/2010 22:05 PM

From my dock on our canal in Cape Coral, I saw many more manatees in 2009 than ever before. Once a group of five passed. We are nearly two miles up from the river. It may have been weather patterns or temperature.

The statement about "colder than average waters" may interest some legislators. Maybe not.

anonymous
Caryn Self-Sullivan 12/23/2009 10:43 AM

It is indeed sad to see another record set for manatee mortality and an indication that the mortality rate is probably not declining statewide. Certainly, we must maintain strong conservation strategies where they are working and modify conservation strategies where they are not working. However, to say that 419 is 12.5% of the Florida population is a gross misinterpretation of the data. First, there is no statistically valid population estimate. There are minimum population counts done.... More

anonymous
janine 12/22/2009 04:42 AM

Poor things people should be more careful of them.

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