AXOLOTL EL AJOLOTE PDF

All rights reserved. The axolotl pronounced ACK-suh-LAH-tuhl salamander has the rare trait of retaining its larval features throughout its adult life. This condition, called neoteny, means it keeps its tadpole-like dorsal fin, which runs almost the length of its body, and its feathery external gills, which protrude from the back of its wide head. Found exclusively in the lake complex of Xochimilco pronounced SO-chee-MILL-koh near Mexico City, axolotls differ from most other salamanders in that they live permanently in water. Close relatives of the tiger salamander, axolotls can be quite large, reaching up to a foot in length, although the average size is closer to half that. They are typically black or mottled brown, but albino and white varieties are somewhat common, particularly among captive specimens.

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All rights reserved. The axolotl pronounced ACK-suh-LAH-tuhl salamander has the rare trait of retaining its larval features throughout its adult life. This condition, called neoteny, means it keeps its tadpole-like dorsal fin, which runs almost the length of its body, and its feathery external gills, which protrude from the back of its wide head.

Found exclusively in the lake complex of Xochimilco pronounced SO-chee-MILL-koh near Mexico City, axolotls differ from most other salamanders in that they live permanently in water. Close relatives of the tiger salamander, axolotls can be quite large, reaching up to a foot in length, although the average size is closer to half that.

They are typically black or mottled brown, but albino and white varieties are somewhat common, particularly among captive specimens. Axolotls are long-lived, surviving up to 15 years on a diet of mollusks, worms, insect larvae, crustaceans, and some fish. Accustomed to being a top predator in its habitat, this species has begun to suffer from the introduction of large fish into its lake habitat.

Natural threats include predatory birds such as herons. Populations are in decline as the demands of nearby Mexico City have led to the draining and contamination of much of the waters of the Xochimilco Lake complex.

They are also popular in the aquarium trade, and roasted axolotl is considered a delicacy in Mexico, further shrinking their numbers. They are considered a critically endangered species. Nowadays, it is critically endangered in the wild because of the pollution and urban sprawl that threaten its habitat in the Mexican Basin. Read Caption. An axolotl photographed at Detroit Zoo in Michigan. Continue Reading.

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Axolotl. El ajolote

Instead of developing lungs and taking to the land, adults remain aquatic and gilled. Axolotls should not be confused with waterdogs , the larval stage of the closely related tiger salamanders A. Neither should they be confused with mudpuppies Necturus spp. As of [update] , wild axolotls were near extinction [7] due to urbanization in Mexico City and consequent water pollution , as well as the introduction of invasive species such as tilapia and perch. Axolotls are used extensively in scientific research due to their ability to regenerate limbs. Surveys in , , and found 6,, 1,, and axolotls per square kilometer in its Lake Xochimilco habitat, respectively. Just a month later, two wild ones were spotted in a network of canals leading from Xochimilco.

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