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Biology

A Portuguese Fish Can Clone Itself

A Portuguese Fish Can Clone Itself
Aaron Greenbaum
Aaron Greenbaum
May 26, 2017

When most people think of reproduction, they think of a male and a female doing the birds and the bees, which results in either a male or female baby. However, nature has a way of throwing us a monkey wrench, which is how best to describe a fish that essentially reproduces through cloning.

According to a recent study led by Miguel Morgado-Sandtos from the Universidade de Lisboa in Portugal, published in the journal Royal Society Open Science, a river fish known as the Squalius alburnoides — sorry, no non-scientific name here — is capable of androgenesis. What is androgenesis? Basically, it’s a form of reproduction where all genetic information comes from the father’s sperm. Granted, the sperm still needs an egg to create a baby fish, but none of the genetic information from the egg is passed on. Depending on what courses you took in high school or college, you might wonder why this discovery is such a big deal. Androgenesis is rare, especially in nature, and is mostly limited to certain species of arthropods and mollusks. The Squalius alburnoides is the first recorded vertebrate species that naturally evolved to reproduce via androgenesis.

Actually, calling the Squalius alburnoides a species is a bit of a misnomer, as it is a “hybrid complex.” According to the research paper, what we know as the Squalius alburnoides may be the result of inter-species reproduction between female Squalius pyrenaicus and an unidentified/extinct species of fish related to Anaecypris hispanica. Unlike other hybrid complexes, all Squalius alburnoides are fertile. Furthermore, Squalius alburnoides are theorized to rely on closely related Squalius species, such as existing Squalius pyrenaicus, to maintain their population.

This study was a followup to another study by Morgado-Santos, which examined the mating patterns of Squalius alburnoides. That first study discovered by accident a fish that only had paternal chromosomes (chromosomes from the father).

“I was very surprised,” explained Morgado-Santos. “I thought maybe it was a mistake and we had captured the father.”

All of the offspring in the new study were Squalius alburnoides, which supports the theory that Squalius alburnoides is indeed capable of androgenesis, as a large number of the parents were Squalius pyrenaicus.

If the concept of “one species reproducing with another to create a baby of its own species” sounds familiar, that’s because it’s one of the distinguishing features of the Mass Effect franchise’s Asari race. While I cannot speak for the probability of the existence of aliens, we now know that the Asari’s ability to reproduce with any humanoid species and create an Asari baby is 100% based on reality.

W3Schools
Related Itemsfeaturedfishgenetic studyPortugal
Biology
May 26, 2017
Aaron Greenbaum
Aaron Greenbaum

All you have to do to get my attention is talk about video games, technology, anime, and/or Dungeons & Dragons - also people in spandex fighting rubber suited monsters.

Related Itemsfeaturedfishgenetic studyPortugal

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