'Possibility that giant squid has very high intelligence' is shown by genome analysis
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Giant squid (scientific name: Architeuthis dux) is one of the largest invertebrates in the world, and is a giant squid that reaches 6.5m including the tentacles. The latest genome (base sequence) analysis revealed that such a giant squid has a very complex and highly evolved brain.
draft genome sequence of the elusive giant squid, Architeuthis dux | GigaScience | Oxford Academic
https://academic.oup.com/gigascience/article/9/1/giz152/5697198
Unprecedented gene study suggests giant squids may be massively intelligent | Inverse
https://www.inverse.com/article/62343-gene-study-reveals-giant-squid-may-be-intelligent
Although giant squid has been found in oceans around the world, it is basically found in the deep sea, so the number of found is extremely small, and most of them are carcasses that have been launched on the beach or drifted off the sea. This is the first time that a Japanese researcher has taken a picture of a living Daiouika in video.
The following is an image of Daioika taken in the deep sea off the Ogasawara Islands in 2013.
Giant Squid (Architeuthis) footage, January 27, 2013-YouTube
When a research team of Caroline Albertin et al., A biologist at the University of Chicago, analyzed the genome of Bivalvia, the genome size was about 2.7 billion bp (base number). Human base pairs are about 3 billion bp.
The research team also found about 100 genes related to a protein called 'protocadherin' in the genome of daika. Protocadherin is a precursor of cadherin , a protein that performs cell adhesion, and is particularly involved in the formation of synapses that transmit information by nerve cells.
In a 2015 study , many genes related to protocadherin were found in the octopus genome, and previous studies have shown that octopuses have extremely high intelligence.
Why are octopuses called 'invertebrate superstars'? -GIGAZINE
'Protocadherin is considered an important substance in correctly wiring the complex brain,' Albertin said, suggesting that giant squid can be as intelligent as octopus.
by Gilbert Mercier
Scientific media Inverse points out that the study did not answer the question, 'Why did giant squid grow so big?' Analysis of mitochondrial DNA in a study in 2013 revealed that the same species of blue-spotted squid, which was thought to have been several types until then, was present. However, because the genome samples of cephalopods , including giant squid, are too small, it is still unclear why only giant squid grew so large.
The research team said, `` The analysis of the genome in this study will be a trigger to solve the mystery of the awe-inspiring creatures of Daioika in the future, '' said researching the genome of Daioika. Argued that a better understanding of the diversity of living things on the planet could be made.
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