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Sharks are losing their smell and their vision of colors,Japanese researchers have concluded that sharks have many more possibilities before. In the process of evolution, they lost some sense, writes Chronicle.info in reference to Aspects
Japanese scientists have long been engaged in studying these ocean dwellers as sharks. As a result of the experiments, they established that in ancient times they made more sense than their modern representatives. The results that they shared in the article, which was printed in the medical journal Nature Ecology & Evolution.
It is reported that for the study of genetics have used the genome method sekvenirovaniya Japanese leopard sharks and korichnevaya feline sharks, and the resulting parts assembled whale shark genome. In such an unusual experiment, it has been established that the whale shark genome contains a large number of DNA called "junk". In addition, scientists can not explain all the DNA sequences and their functions. These results suggest that ancient sharks had a fairly good sense of smell and had the ability to distinguish colors, but today these functions are completely lost.
We found that the Japanese cat shark rodopsina gave the opportunity to have night vision, but korichnevaya only has opsins – it gives the opportunity to see in the red spectrum. They also discovered that sharks smelled of an unknown receptor, which had formed during the course of evolution.
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