Manatee Protections in Belize Should Be World Model, Expert Says
for National Geographic News
|September 27, 2006|
Efforts to protect manatees in the coastal waters of Belize stand to
benefit the global conservation of the huge, sluggish marine mammals, a leading expert says.
"In Belize they've got a strong [manatee] population, probably the densest in all of Central and South America," said Caryn Self-Sullivan, a doctoral candidate in wildlife and fisheries at Texas A&M University in College Station.
Self-Sullivan studies manatees in the sparsely populated Central American country, which she says is perfectly suited to the giant animals.
(See Belize photos, maps, fast facts, and more.)
Scientists believe at least a thousand manatees ply Belize's coastal waters, which are protected by barrier reefs, dotted with mangrove islands, and sliced by narrow channels.
And the sea grass-grazing mammals, which can weigh more than 1,000 pounds (455 kilograms), have been protected in Belize since the 1930s.
The combination, according to Self-Sullivan, has allowed the endangered species to maintain a relatively robust population there, even as manatee populations elsewhere in the world face pressure from coastal development, boat traffic, and hunting.
She hopes that studying what works for manatee conservation in Belize will help keep the gentle giants from extinction and protect the coastal habitats they need to survive.
"We do face realistic obstacles that other countries face," Nicole Auil, a conservation biologist and manatee expert with the nonprofit Wildlife Trust in Belize City, Belize, said in an email.
Belize's current tourism boom, for example, is driving increased coastal development and boat traffic that pose a threat to the nation's manatees, she says.
But a program spearheaded by Wildlife Trust is promoting manatee-safe development and educates tour operators on how to avoid boat collisions with the marine mammals.
Self-Sullivan notes that manatees and other wildlife are Belize's main tourist attraction. Belizeans understand that protecting wildlife is good for the economy, she adds.
Manatees belong to the scientific order of Sirenia, of which there are only four species remaining in the world: West Indian, West African, and Amazonian manatees, and dugongs.
(What's the difference between manatees and dugongs? See dugong photos, video, fast facts, and more.)
All four species are vulnerable to extinction from habitat loss and other impacts related to human population growth and coastal development.
According to Self-Sullivan, the wholesale slaughter of manatees during the 17th and 18th centuries to feed plantation workers in the Caribbean contributed to their drastic decline.
By the early 1900s manatees were commercially extinct.
"There were no longer enough around to make it worthwhile to hunt manatee," she said.
Today, manatee hunting is illegal almost everywhere in the world, though they are still taken in many places in West Africa and Central and South America, Self-Sullivan says.
In the African country of Ghana, where Self-Sullivan advises a manatee conservation project, the marine mammals are killed "for subsistence," she said.
"People in the villages are obviously having a hard time getting enough food and quality protein."
In other regions, such as the Chetumal Bay bordering Mexico and Belize and the Bay of Honduras that encompasses the coasts of Belize, Honduras, and Guatemala, manatees are thought to be hunted and sold on the black market. (See Belize map.)
In Florida and Belize, boats are the greatest manatee threat.
Almost every adult manatee examined in Florida's waters bears at least one scar from a collision, according to Self-Sullivan.
"It's a matter of shared habitat," she said. "Primary [manatee] habitat is shallow coastal waters, and that's where most of the boats are, the small boats in particular."
Manatee-boat collisions also happen in Belize, Self-Sullivan says, but the impacts are less frequent and less lethal there.
This may be because manatees can hear boats approaching in the channels and lay on the bottom for the boats to pass before coming up to breathe.
However, the giant sea mammals are unable to hear boats that cut across the sea-grass beds because the beds muffle motor noise.
"They can't hear it until it's right on top of them, and then it's startled and as likely to bolt in the direction [of the boat] as away from the boat," she said.
Tour-operator education programs like the one run by Wildlife Trust teach guides not to cut across the beds, thereby reducing manatee collisions.
Auil of the Wildlife Trust says the Belizean government is working with her organization and other conservation groups to post boat speed limit signs in key manatee areas. She now hopes the rules will be enforced.
"If no one is on the water to enforce the signs, boaters may ignore them," she said. "The success is yet to be seen, but we are hopeful they will comply."
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