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    Alligator Snapping Turtle (Macrochelys temminckii)


    Registration date : 2008-08-09
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    Location : Ventura, California
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    Alligator Snapping Turtle (Macrochelys temminckii) Empty Alligator Snapping Turtle (Macrochelys temminckii)

    Post by sesrocker on April 27th 2009, 19:22

    Alligator Snapping Turtle (Macrochelys temminckii) CommonSnappingTurtle

    Scientific Name: Macrochelys temminckii
    Kingdom: Animalia
    Phylum: Chordata
    Class: Reptilia
    Order: Testudines
    Family: Chelydridae
    Genus: Macrochelys

    The Alligator Snapping Turtle is one of the largest freshwater turtles in the world. It is a larger and slightly less aggressive relative of the Common Snapping Turtle.

    The Alligator Snapping Turtle is found in the Mississippi River and its tributaries throughout the Southeastern U.S.. They are also found in the Missouri River at least as far north as the Gavins Point Dam at Yankton, South Dakota. The Alligator Snapping Turtle has also been found in New England. It is also present in Indiana on the state's endangered species list. It has been recorded in Morgan County, IN(south east) in 1991 and captured but not recorded, within the last 15 years, in Newton County, IN (north west).

    The largest freshwater turtle in North America, the alligator snapper keeps to primarily southern U.S. waters. These turtles can remain submerged for up to an hour, and typically, only nesting females will venture onto open land.

    Physical Characteristics
    The Alligator Snapping Turtle is characterized by a large, heavy head and a long, thick tail with three dorsal ridges of large scales (osteoderms) giving it a primitive appearance reminiscent of some of the plated dinosaurs. They can be immediately distinguished from the Common Snapping Turtle by the three distinct rows of spikes and raised plates on the carapace, whereas the Common Snapping Turtle has a smoother carapace. They are a solid gray, brown, black, or olive-green in color, and often covered with algae. They have radiating yellow patterns around the eyes, serving to break up the outline of the eye and keep the turtle camouflaged. Their eyes are also surrounded by a star-shaped arrangement of fleshy filamentous "eyelashes." They generally do not grow quite that large. Average adult size is around 26 inches shell length with a weight of 175 lb. Males are typically larger than females.[3] Alligator snapping turtles can also range in length from 16 to 32 inches (40.4 to 80.8 cm). The inside of the turtle's mouth is camouflaged, and it possesses a vermiform (literally, "worm-shaped") appendage on the tip of its tongue used to lure fish, a form of Peckhamian mimicry. The turtle hunts by lying motionless in the water with its mouth wide open. The vermiform tongue imitates the movements of a worm, luring prey to the turtle's mouth. The mouth is then closed with tremendous speed and force, completing the ambush.

    The Alligator Snapping Turtle possesses extraordinary bite strength, and can be quite aggressive when cornered. These turtles must be handled with extreme care.

    Alligator snappers are opportunistic carnivores more often at a young age, but are also scavengers. As they mature they become omnivores and do not pose a threat to fish populations. Minnows are usually the main source of meat for the species at a young age. They will eat almost anything they can catch. Their natural diet consists primarily of fish and dead fish carcasses (usually thrown overboard by fishermen), invertebrates, carrion, and amphibians, but they are also known to eat snakes, and even other turtles. In captivity they may consume almost any kind of meat provided, including rodents, beef, chicken and pork although these are not always healthy on a day to day basis. Though not a primary food source for them, Alligator snappers have been known to kill actual alligators they have been confined with, such as in a net, small bog, or poorly-planned aquarium display.

    Mating takes place yearly; early spring in the southern part of their total range, and later spring in the north. The female builds a nest and lays a clutch of 10-50 eggs about 2 months later. The sex of the baby alligator snapping turtles depends on the temperature at which the eggs are incubated. Nests are typically excavated at least 50 yards from the water's edge to prevent them from being flooded and drowned. Incubation takes from 100 to 140 days, and hatchlings emerge in the early fall.

      Current date/time is May 22nd 2019, 13:20