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About Manatees

Manatees are curious marine mammals that spend their day
eating, sleeping, and playing. It was the playing part that
drew us to Central Florida to get a closer look at these shy
sea cows. Many years ago we discovered that not only could you
get a close-up view of these strange looking animals from
above the water, but it was indeed possible to get in the
water and snorkel with these gentle giants. We started
researching and found that the Florida manatee, a subspecies
of the West Indian manatee, ranges from the St John’s River
south to around Miami on the Atlantic coast, and that they
tend to congregate anywhere from the Everglades north to the
Suwannee River on the Gulf Coast. Of most interest was the
fact that they migrate to warmer waters during the winter
months. They seek out as refuge from the cold, the warm spring
fed waters of Crystal River, Weeki Wachee Spring, and
Homasassa Spring, which are a constant 72 degrees Fahrenheit
year round. The best time to see the manatees gathering
in the rivers is anywhere from October to April.
Facts about Manatees
Here are some interesting facts:
Common
Name: West Indian Manatee, also know as "Sea Cow"
Scientific
Name: Trichechus Manatees
Estimated
Population: Fewer than 3,000
Range:
Found throughout rivers, springs, and shallow coastal waters
of Florida and neighboring states
Population
Status: Endangered
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Seen here, a manatee and its
calf are fancying
the clear surface to catch a breath of air, making.
known their presence to the unwary world above |
A young calf is seen here
nursing with its mother.
Manatees make devoted mothers and tend to care
for its calves till about 2 years of age. |
The average weight of a manatee is about 1200
pound (500 kg). They grow up to 12 feet long. Manatees
hold their breath for 3 to 5 minutes when active and up to 20
minutes when resting.
A manatee eats as much as 10% of its body weight
each day. Like whales, their large bodies can only be supported in
their watery environment. On land, their body weight would crush
their internal organs.
What weights over 1000 pounds, looks a bit like
a walrus with wrinkled, gray-brown, spongy skin, is sometimes called
a "sea cow", is related to an elephant, was mistaken for mermaids,
can eat more than 100 pounds of vegetables per day, and travels an
average of 3 to 5 miles per hour? Why the manatee, of course!
These large animals were once thought to be
related to walrus because of the way they look. Today, scientists
are able to identify animals using genetics. Now they know that
manatees are more closely related to elephants than any other living
animal. Scientists believe that manatees evolved from land mammals
that returned to an aquatic life.
Manatees are the only marine mammals that are
herbivores. Just to keep their big bodies warm, they have to eat up
to one tenth of their body weight every day. For the typical manatee
that means more than 100 pounds of water plants! That's equal to
more than 200 heads of lettuce!
Keeping warm is a real problem for these
animals. Their cylindrical bodies help conserve heat, but they don't
have the blubber that other marine mammals do. Their metabolism is
also very low, so they don't generate a lot of body heat. As a
result, they can get sick when the water temperature falls below 70°
F. In cold water, they can develop pneumonia, get too sluggish to
eat, and can die. Most manatees live in warm, tropical waters, but
Florida manatees live in sub-tropical waters that get below 70° F in
the winter months (Dec. through Mar.). Manatees have a behavior
which helps them survive the colder water. In the winter, they seek
out the natural warm springs of Florida's coastal rivers. They even
gather where electric power plants discharge warm water. To protect
manatees, many of these areas are now Manatee Sanctuaries.
Manatees are well suited to their slow aquatic
life. They have flexible front limbs that they use to steer as they
swim. They can also use these limbs to hold their food. Their body
ends with a large paddle shaped tail. With powerful up and down
strokes, they use their tail to push them through the water. Usually
they move along at 3 to 5 miles per hour, but when frightened, they
can move more quickly
Like all mammals, manatees breathe air. As a
marine mammal, they must rise to the surface to take a breath. While
resting this happens every 20 minutes, but when they are active,
they need to take a breath every 3 to 5 minutes. When people
breathe, they only change about 10% of the air in their lungs. When
manatees breathe, they change up to 90% of the air in their lungs.
To do this, they exhale very hard when their nose breaks the
surface, much like a whale or a person snorkeling will do. While
they don't "spout" like a whale will sometimes do, there is often a
cloud of mist. Breathing like this means there is more fresh oxygen
in their lungs, and allows the animal to stay underwater longer
between breaths. Manatees also have two other special breathing
adaptations. They can only breathe through their nose, and their
nostrils have special flaps that close tightly when they dive.
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These creatures have amazingly
remarkable motor
control in the water which makes up for the adapted
extremities that is seemingly an impossible feat,
though they seem bulky and ergonomically
unfashionable. |
Traveling in schools and
pairs, manatees are
familial creatures that like to congregate
like humans. They are prone to active
social animals that is a common feature
of mammalian characteristics. |
A manatee's mouth and teeth are specially
adapted to an herbivorous life. They do not have front teeth, only
special "marching" molars. Like elephants, they have 4 sets of 6 to
8 molars. As the front molar wears down from chewing on fibrous
plants and sand, it is shed. The teeth behind it "march" forward as
a new tooth emerges at the back. Without hands, it can be hard to
get food to your mouth. To solve this problem, manatees have a
large, split upper lip. The left and right sides can move
independently to move the food into place. Last of all, behind the
lips special ridged pads break food into smaller pieces before the
molars finally grind it up.
Manatees are generally solitary animals.
However, when a female is ready to mate, several males will gather
around her forming a mating herd. After mating, they resume their
solitary lives. There is, however, a strong bond between cow and
calf. After birth, calves stay close to their mothers, and touching
seems to be important to them. They nurse for nearly a year, and
stay with their mother for up to two years.
At birth, manatee calves weight 70 pounds (30
kg) and are 50 inches (120 cm) long. They can live to be 70 years
old, weigh as much as 2,000 pounds (500 kg), and be more than 12
feet (3 m) long. Reproduction is slow for manatees. Manatees are
mature and able to breed at about 10 years of age. The gestation
period is one full year for manatees, and cows give birth only once
every 3 to 5 years.
Manatees communicate with each other with voices
that sound like clicks and chirps. The sounds they make can be heard
by humans. Communication is especially strong between a cow and her
calf, and that helps the two remain in contact with each other.
Where to Find Manatees
In the Wild...
Blue
Spring State Park, Orange City, FL
Crystal
River Wildlife Refuge, Crystal River, FL
Florida
Power and Light Plant, Fort Lauderdale, FL
Homosassa
Spring, Homosassa, FL
Tampa
Electric Company Big Bend Walk, Tampa, FL
In Captivity...
Disney
World, Orlando, FL
Miami
Seaquarium, Miami, FL
Nature
World Attraction, Homosassa, FL
Sea
World, Orlando, FL
Here is the range of the manatees throughout the world.

The rivers and springs around Crystal River and
Homosassa Springs are among the few places in the world where divers
can still interact with these rare marine herbivores. In the
crystalline freshwater pool at Homosassa Springs, we’ve snorkeled
among more than 20 manatees. It can be a little scary when a
1000-pound, 10-foot long critter starts sucking on one of your fins
or decides to swim between your legs while you’re trying to take its
picture. Manatees have total buoyancy and can swim sideways and
upside down and can turn on a dime.
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This manatee has traveled wide
and far. Manatees
are often seen worn and battered because they
do not possess extremities to groom and clean
themselves but by scratching or rubbing themselves
against surfaces... thus they are found under boat
bellies and pilings which possess its own dangers. |
Manatees are curious animals -
often find
them sucking on the fins and swimming
between the legs of divers. They also enjoy
touching and rubbing sensations since they cannot
relieve themselves.
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From November to March, the manatee leaves the
frigid coastal waters to bask in the warmth of Florida’s many rivers
and springs. During this peak season, sanctuaries such as those
around Kings Bay in Crystal River host the largest winter gathering
in Florida—as many as 300 manatees have been sighted in and around
this area. Divers and snorkelers should also keep their eyes open
for many varieties of freshwater fish. For non-divers, just relax
and stay in the boat. With water this clear, you’ll have a "big
picture" view of nearly all of the manatees in the spring. At local
shops, you can buy an inflatable periscope-like device that also
provides a more telescopic underwater view.
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The Crystal River system seen
here is one of the last
known refuges for the manatee, which is treaded
carefully for all river-faring occupants - both residents
and visitors who enjoy slow and wake-less rides. |
Manatees are protected in some
waters, but it is still
a far solution from the sharp blades, hard bottoms
and savaging edges of the problems that lead to
damaged manatees |
Everyone should experience the grace of these
beautiful animals. We should work harder to protect them if more
people had intimate interaction with the manatees. Just remember to
operate your boat at idle and slow speed in areas where manatees are
likely to be. This easy and simple rule, if followed, will help save
these endangered animals.
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Like any other animal on this
earth who have
been been fancied by humans alike, touch and
contact is a universal language all can appreciate.
These are just the few luxuries we have of these
endangered animals who are becoming extinct. |
Looking at a manatee is like
looking into a gentle
past. These magnificent creatures hold silence
to a past which has offered them survival despite
our technological advancements that is becoming
and increasing threat to their habitat and existence. |
Endangerment
Habitat loss, harassment, watercraft collisions,
and accidental ingestion of discarded fishing line and other
synthetic debris floating in water-ways are among the number of
life-threatening hazards manatees face. There are several survival
stories as well as sightings of the manatee that are shared among
those who support the survival of the Manatee, as well as those who
happen to sight them on their journey's. Last year in Florida alone,
there were 87 Manatee rescues & releases. The Save the Manatee
organization explores these and other issues in public-information
campaigns and provides literature and brochures to citizens
interested in helping to preserve the Manatee. A few of the survivor
stories include a manatee named 'Moises' who is one of the many
survivors whose life was extended because others cared. Another
fascinating story involved the first neurological surgery ever
performed on a Manatee named 'Nash'. This surgery was performed by a
team of doctors at the Miami Seaquarium, founded by the Marine Life
Preservation Society, and was marked as the first time in history
that a neurosurgical procedure had ever been performed on an
endangered marine mammal such as the Manatee. The survival and
protection of the Manatee is dependent on various organizations,
State parks, volunteers, grants, donations and government, along
with the respect and kindness from humans.
Primary
Causes of Death
watercraft
collisions
crushed
or drowned in storm or flood gates
vandalism
and poaching
entrapment
by man-made structures
cold
stress
natural
causes and loss of habitat
entanglement
in lines and nets
crab
trap entanglements
diseases
and illnesses
birth
complications
ingestion
of hooks, lines, plastics and other pollutants
natural
catastrophes and "red tide"
A word of caution: The manatee is an endangered
species and is protected by strictly enforced state and federal
laws. Prior to a dive tour or boat rental from one of the local dive
shops, you’ll be required to review a video and brochure. Pay close
attention. Violations can be costly—up to $100,000 and one year in
prison. The single most important guideline for interacting with
manatees is the same as with other wildlife—look, but don’t touch.
Contact with manatees can be nearly as hazardous to their well-being
as feeding or watering them. Frequent contact with humans can lead
to behavior modifications, which reduces their natural fears and
makes them even more susceptible to harm.
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This manatee is seen marred by
entanglements with
fishing line, and luckily is survived by a reminder
that will follow its every stroke of movement for
the rest of its life. |
Conservationists are hard at
work locating and
repairing damage caused by lines although the
recovery is always at the expense of the
debilitated and defenseless mammals. |

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