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Do fish count? ? ?

You heard that right. A recent study from the University of Bonn in Germany confirmed this:

The zebrafish and stingrays can add or subtract 1 digit from 1 to 5.

And the accuracy is as high as 94%.

The research has been published in Nature’s Scientific Reports:

How do fish count?

The objects of the researchers’ experiment were 8 zebra-like cichlids and 8 stingrays, which were obtained from the Frankfurt Zoo in Germany. Among them, 6 zebra-like cichlids participated in the previous “Cognitive experiment“.

The experimental environment is as follows:

They were placed in an experimental container of 61cm × 31cm × 31cm.

The researchers first showed the fish cards marked with blue or yellow icons (blue for “+1” and yellow for “-1”). Then in this container there are 2 doors with different numbers of icons on them, but only 1 door is the “positive solution”.

For example, if a fish is shown a card with 3 blue icons, the task now is to count “3+1”.then the fish needs to go throughThe door with only 1 blue iconif it swims correctly, it will be rewarded.

The principle of subtraction can also be deduced in the same way.

The results of the experiment found that 6 zebra cichlid and 3 stingrays were able to rememberThe relationship between blue, yellow and addition and subtraction.

So how long did it take them to learn the math?

The zebra-like cichlid learned after an average of 28 rounds, the researchers said; the stingray averaged 68 rounds. And they learn addition faster than subtraction:

  • Zebra-like cichlid: 381 additions got 296 (78%) correct; 381 subtractions got 264 (69%) correct.

  • Stingray: 169 out of 180 additions (94%); 161 out of 180 subtractions (89%).

In this regard, the researchers stated:

It is necessary for humans to re-study the cognitive and perceptual abilities of fish.

Netizens exclaimed

Fish knows mathematics, and in the face of such experimental results, netizens have expressed “magic”:

There are also netizens who have opened their minds and remembered the old saying:

Eating fish makes you smarter…

So, what do you think of this research? Welcome to leave a message in the comment area to discuss.

Reference link:

[1]https://www.nature.com/articles/s41598-022-07552-2

[2]https://weibo.com/1231317854/LmrourAIw

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