Small wrasse-cleaners have successfully passed “the mirror test” developed for the diagnosis of the consciousness of animals.
Small reef fish are able to recognize themselves in the mirror. To such conclusion the Japanese scientists from Osaka University. Experiments were carried out a year ago, but so far their results have been disputed and in need of re-examination.
Fish Labroides dimidiatus, or the wrasse-cleaners, successfully passed the “mirror test” developed in the 1970s for the diagnosis of the consciousness of animals. The researchers applied a brown mark on the body of the fish so that it was visible only in the mirror. After the wrasse saw myself in the mirror, they tried to scrape off the stain, rubbing his body on the rocks. However, not tried to do it without a mirror. The results of the experiment show that the fish identified himself with the reflection. If the mark is transparent, the cleaners tried to remove it.
“Such behavior indicates a clear passage of fish “mirror test,” says Alex Jordan from the University of Osaka. — However, it is not clear whether to interpret this behavior as “self-awareness” characteristic of many other species”.
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Japan is an island country in East Asia.
|Coat of arms
Capital – Tokyo
Biggest cities: Tokyo, Yokohama, Osaka, Nagoya, Sapporo, Kobe, Fukuoka, Kyoto,
Kawasaki, Saitama Prefecture
Form of government – Constitutional monarchy
Territory – 377 944 km2 (61st in the world)
Population – 126,82 million people (10th in the world)
Official language – Japanese
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Currency – Japanese yen
Still this test were able to pass the great apes — chimpanzees, bonobos, gorillas and orangutans; dolphins, orcas, elephants, new Caledonian crows and magpies. Children are able to recognize themselves in the mirror at the age of 18 months. And cats and dogs show conflicting results.
Ethologist Frans de Waal (author of “the mirror test” for mammals) calls not to perceive the identity animal categorical, considering that it is either “there” or “no”. “What if self-awareness develops like onions, building up layer by layer, instead of appearing once and completely? — says the scientist. — Perhaps a more complete theory of identity and extensive tests with a “mirror test” will reveal different levels of it, including the one in which there are fish”.
How wrote portal “Around the world. Ukraine” dolphins can recognize themselves in mirrors before the people.