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Archerfish has the ability to recognize human faces: Study

In 2015, a study was done on Ambon damselfish (Pomacentrus amboinensis) where these fish could recognize facial differences among their own species with the aid of ultraviolet wavelengths

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Archerfish. Image source: awesomeocean.com
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  • The Archerfish can be trained to recognize faces
  • Prior to this discovery, it was thought to be impossible
  • Scientists trained them with treats

Humans differ from other species in every sense of the term. Our physique, our body composition, and our mental capacity makes us stand out from the rest of the creatures on this earth. It is particularly our mental capacity, and our cognitive thinking that makes us to feel superior to other species and with this type of mental strength we are able to recognize when we discover new facts, and admit wrongs.

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A recent study published in the journal “Scientific Reports,” shows that we were wrong about fish, or at least one specific fish. The Archerfish, scientifically known as the Toxotes chatareus, which can actually be trained to recognize a human face.

Prior to this discovery, it was a universal fact that fish do not have a neocortex. The neocortex is a part of the brain in mammals. That is why this find is so interesting. When scientists look at the neocortex in mammals such as rats it is a smooth gray matter. When l we look at the neocortex in more advanced specifies such as humans and primates, it has grooves and these grooves increase the area of the neocortex. The responsibilities of the neocortex are as follows, sensory perception, motor commands, spatial reasoning, conscious thought, and language in humans.

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The Archerfish has the ability to recognize patterns. When thoroughly trained, the fish can differentiate between two photographs of people, and with astonishing accuracy. Scientists chose the Archerfish because it spits water, allowing scientists to understand what it was trying to communicate.

The scientists used operant conditioning to train the fish. They presented pictures of faces to the fish and taught them to distinguish between the two, and choose one over the other. When they chose the correct face, the fish were rewarded with fish feed. This process was repeated for days and up to two weeks.

The accuracy of the fish shocked scientists. The fish were correct 81% of the time. The stunned scientists further when their accuracy increased to 86% when the pictures were changed a bit in regards to color tones and head shapes. The fish simply look for patterns among the faces.

Other studies like this one have been conducted in the past. In 2015, a study was done on Ambon damselfish (Pomacentrus amboinensis). This research found that these fish could recognize facial differences among their own species with the aid of ultraviolet wavelengths. It is thought that they use this facial recognition tool to communicate with each other silently, keeping predators in the dark.

-by Abigail Andrea, an intern at NewsGram. Twitter: @abby_kono

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Scientists Track ‘Ghost Particle’ to Source for First Time

The blazar that is considered the source of the neutrino was named TXS 0506+056 and is believed to be the first known source of a high-energy neutrino

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This artist's impression of the active galactic nucleus shows the supermassive black hole at the center of the accretion disk sending a narrow high-energy jet of matter into space, perpendicular to the disc in this image by Science Communication Lab in Kiel, Germany, released on July 12, 2018. In a study published in the journal Science, researchers have determined that a supermassive black hole like this one is the source of high-energy neutrinos detected on Earth. (VOA)

Scientists have announced a new finding about the source of a high-energy neutrino, a subatomic particle detected at an observatory at the Earth’s South Pole.

The study, published Thursday in the journal Science, details the work of more than 1,000 scientists who pooled their research on the tiny particles, which are able to pass through matter in a straight line — like a ghost.

The neutrino’s ability to travel without deviation from its course means its source can be accurately tracked, unlike other types of subatomic particles that can be dragged off course by a magnetic field like the Earth’s.

“[Neutrinos are] very clean, they have simple interactions, and that means every single neutrino interaction tells you something,” said Heidi Schellman, a particle physicist at Oregon State University.

Also Read: Scientists Develop Potential Approach to Treat Dementia, Stroke

The scientists used a large observatory known as IceCube, in use since 2010, to hunt for neutrinos and try to track the source. A group of neutrinos coming from the same location over the past couple of years was determined to have emanated from a blazar, or black hole that aims a jet of radiation at Earth. The black hole is estimated to have been in a distant galaxy that destructed four billion years ago.

The blazar that is considered the source of the neutrino was named TXS 0506+056 and is believed to be the first known source of a high-energy neutrino.

The discovery could be a breakthrough for multimessenger astronomy, where scientists look at the entire electromagnetic spectrum and pool their findings, using known relationships between types of electromagnetic particles to put together a larger picture.

“It is an entirely new means for us to learn about the cosmos,” Roopesh Ojha of NASA’s Goddard Space Flight Center told The Washington Post. (VOA)