Manatee facts

DESCRIPTION: West Indian manatees are large, gray-brown aquatic mammals with bodies that taper to a flat, paddle-shaped tail. They have two flippers with three to four nails on each and their head and face are wrinkled with whiskers on the snout. The manatee's closest relatives are the elephant and the hyrax (a small furry animal that resembles a rodent). Manatees are believed to have evolved from a wading, plant-eating animal. The West Indian manatee is related to the West African manatee, the Amazonian manatee, the dugong and Stellar's sea cow, which was hunted to extinction in 1768. The average adult manatee is about 10 feet long and weighs about 1,000 pounds.

HABITAT AND RANGE: Manatees can be found in shallow, slow-moving rivers, estuaries, saltwater bays, canals and coastal areas. The manatee is a migratory species. Within the United States, West Indian manatees are concentrated in Florida in the winter, but can be found in summer months as far west as Alabama and as far north as Virginia and the Carolinas. West Indian manatees can also be found in the coastal and inland waterways of Central America and along the northern coast of South America, although distribution in these areas may be spotty.

BEHAVIOR: Manatees are gentle and slow-moving. Most of their time is spent eating, resting and in travel. Manatees are completely herbivorous. They eat aquatic plants and can consume 10-15 percent of their body weight daily in vegetation. They graze for food along water bottoms and on the surface. They may rest submerged at the bottom or just below the surface coming up to breathe on the average of every three to five minutes. When manatees are using a great deal of energy, they may surface to breathe as often as every 30 seconds.

LIFE SPAN, MORTALITY, POPULATION: West Indian manatees have no natural enemies and it is believed they can live 60 years or more. Many manatee mortalities are human-related. Most human-related manatee mortalities occur from collisions with watercraft. Other causes of human-related manatee mortalities include being crushed and or drowned in canal locks and flood control structures; ingestion of fish hooks, litter and monofilament line; entanglement in crab trap lines and vandalism. Ultimately, however, loss of habitat is the most serious threat facing manatees today. There are approximately 2,600 manatees left in the United States.

BREEDING AND REPRODUCTION: The reproductive rate for manatees is slow. Female manatees are not sexually mature until 5 years old and males are mature at approximately 9. It is believed that one calf is born every 2 to 5 years. Twins are rare. The gestation period is approximately 13 months. Mothers nurse their young for a long period, and a calf may remain dependent on its mother for up to 2 years.

-- Source: Save the Manatee Club

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