• IASbaba
  • February 25, 2023
  • 0
Environment & Ecology
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Context: Recently, researchers, for the first time, have used the body’s own chemistry to develop electrodes in the tissues of zebrafish (a small freshwater fish).

About Zebrafish :

  • It is a tropical freshwater fish belonging to the minnow family (Cyprinidae) of the order Cypriniformes.
  • Habitat: Native to rivers and streams of South Asia.
  • It is a freshwater fish found in tropical and subtropical regions.
  • The fish is native to South Asia’s Indo-Gangetic plains, where they are mostly found in the paddy fields and even in stagnant water and streams.
  • Features:
    • It is a popular aquarium fish.
    • It is about 4 cm long and has dark-blue and silvery longitudinal stripes.
  • IUCN Red List Status: Least concerned.

Significance of Zebrafish:

  • Zebrafish have the ability to heal their heart after injury through a regenerative process.
  •  If part of their heart is removed, they can grow it back in a matter of weeks.
  • Humans cannot regenerate their hearts upon myocardial damage and a person who suffered a heart attack cannot functionally heal the damaged heart muscle, resulting in reduced pumping efficiency.
  • Till now, there is no treatment available to restore the damaged heart function in humans.
    • Hence scientists have sought to decode the heart regeneration processes using this model animal.
  • In May 2021, it was announced by researchers at the Queen’s University in Belfast, UK that the hibernation form known as induced torpor found in zebrafish will give radio-protective effects, that may be useful for interplanetary voyages
  • Replicating hibernation may therefore protect astronauts against the harsh conditions of space flight
  • Zebrafish have also been found to regenerate photoreceptor cells and retinal neurons following injury.


Previous Year Questions

Q.1) Consider the following statements: (2020)

  1. Genetic changes can be introduced in the cells that produce eggs or sperm of a prospective parent.
  2. A person’s genome can be edited before birth at the early embryonic stage.
  3. Human-induced pluripotent stem cells can be injected into the embryo of a pig.

Which of the statements given above is/are correct?

  1. 1 only
  2. 2 and 3 only
  3. 2 only
  4. 1, 2 and 3

 Q.2) Which of the following are detritivores? (2021)

  1. Earthworms
  2. Jellyfish
  3. Seahorse
  4. Woodlice

Select the correct answer using the code given below

  1. 1, 2, and 4 only
  2. 2, 3, 4, and 4 only
  3. 1, 3, and 5 only
  4. 1,2,3,4 and 5


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