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2023 MAY 26

Preliminary   > Environment and Ecology   >   Biodiversity   >   Species in news

Why in news?

  • The Axolotl, a species of salamander (lizard-like amphibians) possesses an extraordinary ability to regenerate lost body parts.
  • The elusive o (for “ova deficient” gene) plays a pivotal role in the axolotl’s regenerative process.
  • This inspired researchers to look behind its unique regenerative power.

About Axolotl:

  • These are amphibians that spend their whole lives underwater. They exist in the wild in only one placeLake Xochimilco near Mexico City.
    • Lake Xochimilco is an ancient endorheic lake.
    • It is a network of artificial channels, small lakes, and temporary wetlands that help supply water to nearby Mexico City’s 18 million residents.
    • It is also a UNESCO World Heritage site.
  • IUCN Status:
    • Critically endangered.
  • Food:
    • They feast on mollusks, worms, insect larvae, crustaceans, and some fish.
  • Threat:
    • Even though they are amphibians, axolotls remain aquatic throughout their lives but they are now almost extinct in the wild. Their populations have declined considerably due to:
      • a) Habitat loss due to Mexico City’s continued urbanization
      • b) Water pollution
      • c) Invasive fish species such as carp and tilapia, which compete with axolotls for food and prey upon them.

Unique capability:

  • Axolotls, like humans, contain two copies of every gene – one inherited from the father and the other from the mother.
  • Axolotls have the ability to regenerate lost body parts and have a rare trait of neoteny, which means they retain larval features throughout life. These interested cancer researchers for their unique resistance to developing cancerous tissues.


Axolotl was discussed in news due to:

(a) Their ability to regenerate lost body parts.

(b) They tend to reduce the biodiversity in the area in which it grows.

(c) They are useful in fermentation

(d) They are a cheap source of bio-fuel