Axolotl

Fascinating facts about the Axolotl

• The axolotl's genome stretches to 32 billion base pairs, making it the largest animal genome sequenced as of 2018. Despite this massive size, it codes for only about 23,251 proteins, just a few thousand more than the roughly 20,000 proteins in humans.
• Axolotls never undergo natural metamorphosis because they lack the thyroid-stimulating hormone that normally triggers thyroxine production. Without this hormone, they keep their external gills and stay fully aquatic even after reaching sexual maturity.
• Wild axolotl numbers have plummeted from historic densities of about 6,000 individuals per square kilometre to just 36 per square kilometre in the 2014 census, with current estimates of only 50 to 1,000 adults remaining overall. Surveys in 1998, 2003 and 2008 recorded declines from 6,000 to 1,000 to 100 per km², while habitat loss has erased roughly 99.5% of their historic range.
• UNAM's field program now protects axolotls in 21 bamboo-net refuges across Xochimilco, each cage holding up to three same-sex individuals to prevent breeding in the wild. Researchers routinely tag and measure the salamanders, noting rapid growth, one male grew noticeably larger in just one week. Coupled with a captive-breeding stock of 100 individuals at the Laboratorio de Restauración Ecológica (2021), these efforts aim to boost wild numbers.
• If an axolotl loses an arm or leg, it grows back within two months, and the new limb works just like the original.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia
• Mongabay

At a glance

About the Axolotl

In the dimly lit, mystical realm of Mexico's Lake Xochimilco, the axolotl glides effortlessly, its feathery gills wafting like delicate plumes as it navigates the murky waters with an ethereal elegance. With its ability to regrow limbs and resist aging, this enigmatic creature has long fascinated humans, its remarkable regenerative powers a testament to the awe-inspiring complexity of life on Earth. As it moves through the shadows, its lidless eyes gleam like dark jewels, a poignant reminder of the beauty and fragility of a species teetering on the brink of extinction.

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