Toxic algae killing Florida manatees at record rates
Oct 31, 2013 | Raw Story / Agency France-Presse
Toxic algae blooms that deplete the water of essential oxygen are
killing a record number of manatees in Florida this year, biologists
A total of 769 manatees have died trough Tuesday, making 2013 the
deadliest year ever for the blubbery denizens of the deep found off the
Florida coast, Save the Manatee Club announced.
With more than two months left this year, nearly twice the number of
manatees have already died compared to all of 2012, which saw 392
confirmed manatee deaths.
The last record — 766 dead manatees — was set in 2010, when an
unusually cold winter and spring killed hundreds of the delicate
creatures, according to the Florida Fish and Wildlife Conservation
Manatees live near the coastline, and when the weather turns cold,
they often shelter near springs or in warmer discharge canals at power
plants to avoid the condition known as “cold stress,” which can weaken
and eventually kill the aquatic mammals.
“With 2013′s catastrophic loss of manatee lives coming so close on
the heels of the mass mortality suffered during 2010, the already
difficult job to ensure the survival of these gentle and defenseless
marine mammals has been made all the more challenging, and it’s not over
yet,” said the club’s executive director Patrick Rose.
“What we put into our waters, how much we pump from our aquifer and
draw from our springs and rivers, together with how we use our
waterways, all has an impact on our own lives and the lives of every
The club’s director of science and conservation blamed two “unusual mortality events” for this year’s major losses.
Toxic red-tide bloom killed 276 manatees this winter and spring in
southwestern Florida, according to the Florida Fish and Wildlife
Conservation Commission. Most of the deaths took place in the Cape
Cora-Fort Myers region off the Gulf coast.
The second event remains unexplained, but saw more than 100 manatees
die of undetermined causes in Brevard County off the Atlantic coast.
Tripp said those deaths were linked to various algal blooms and the
loss of 47,000 acres (19,000 hectares) of seagrass since 2010.
Of the total number of deaths this year, 123 were stillborn, newborn
or young calves, in another record for that mortality category.
Manatees are a protected species in Florida, highly affected by urban
development in recent years along the coast in the central and southern
parts of the state.
In the bay of Miami, where families of three or four manatees are
commonly spotted along the shore, many of the animals are killed after
being struck by boats.