Squid turns out to be self-control, the first invertebrate

Human beings, who are long-lived and social creatures, have developed a self-control in the process of evolution to 'endure the satisfaction of the present for the future', but the invertebrate squid also has the same self-control as humans. Experiments have shown that they have. Researchers find that the fact that two completely different species have similar intelligence is a very interesting result from a larger perspective of 'biological intelligence.'

Cuttlefish show their intelligence by snubbing sub-standard snacks | University of Cambridge

https://arstechnica.com/science/2021/03/cuttlefish-can-pass-the-marshmallow-test/

The marshmallow experiment was conducted by a research team at Stanford University in the United States from the late 1960s to the early 1970s with the aim of using marshmallows to measure children's self-control and to investigate their relationship with their future social success. is

To put it simply, put a marshmallow in front of a child aged 4 to 6 and tell him, 'If you don't eat this marshmallow for 15 minutes, you'll get another marshmallow.' To do. The marshmallow experiment measures 'the ability to restrain yourself to get more rewards,' and follow-up studies conclude that children who receive a second marshmallow are more likely to succeed socially later. I did.

The results of the marshmallow experiment were later denied, and you can read the experiment and subsequent details below.

The 'marshmallow experiment' that children's self-control will affect the future fails to reproduce, and it is the 'economic and social environment' that has a greater impact than self-control-GIGAZINE

Previous studies have shown that marshmallow experiments have been conducted not only on humans but also on other animals, and that crows and chimpanzees are actually self-controlling. On the other hand, in a new study, squid also succeeded in marshmallow experiments. Researchers say it's surprising that the invertebrate squid has shown self-control.

Of course, in the case of squid, I didn't use marshmallows in the experiment. 1 person Alexandra Schnell said a biologist at Cambridge University which is the paper the author common cuttlefish after examining the preferences of individual taste, the food of the most favorite taste 'reward after showing self-control', 2 The experiment was conducted by setting the food of the second favorite taste as a 'reward that can be eaten immediately'.

As a result, it was found that squid can put up with the food in front of them for their favorite food, and that they can put up with it for 50 to 130 seconds.

Researchers find the results of this study to be very interesting. It is believed that humans can put up with the rewards in front of them for greater rewards because self-control helps for a “future” that strengthens social ties and survives longer. Chimpanzees and crows can also do the same because of the 'future' of saving food and strengthening social ties.

On the other hand, invertebrates such as squid have a relatively short lifespan of 3 years, and are not species that use tools, store food, or strengthen social ties.

'Our understanding of why self-control has developed has been based on evolutionary pressures associated with'longevity social creatures',' Schnell said, and squid is a different path. Claims to have evolved self-control. Squids camouflage themselves and wait and prey on the creatures they feed on. Researchers predict that these predatory styles have limited opportunities, and that they may have developed self-control to increase them.

Researchers believe that studies like this one that identify similar cognitive abilities that exist between different species will help us understand the greater 'evolution of intelligence' of the whole organism.