Apparently, The Sharks Can not Distinguish Colors |Tempatnya Berbagi Info Media Online

Did you know that sharks were not able to distinguish colors? Apparently that's the reality. At the very least, a laboratory study has publish the findings it,Tuesday (18 / 1).

Researchers in Australia, using a technique called micro-spectrophotometry, considering retinal cells 17 species of shark caught off the coast of Queensland and Western Australia.

The researchers found the most common type of light receptor cells 'rod', which is very sensitive to light and allow views at night but could not parse color. But sharks lack cone cells, which react individually to light at specific wavelengths.

In the human eye, a variety of cone cells help us to distinguishcolors. In 10 of the 17 species of shark, not found in the cells'cone' that at all. cone cells found in seven other species, but it's just one kind, and sensitive to the wave length of about 530nanometers, which is green.

Retinal system that means the shark can distinguish betweenshades of gray but, very probably, not the color, the researchers said. In the marine environment, where colors are progressivelyfiltered in the depth and survival depends on the ability to distinguish colors that are very opposite, in order to ascertain whether some form of darkness is a victim or predator.Monochromatic views are very rare among terrestrial species.

Researchers at the document they mention whales, dolphins,and seals also have a cell 'cone' that are sensitive to green,indicating that marine mammals and sharks have the same visual design and parallel.

The study, published in English in a German journal,Naturwissenschaften, can help prevent shark attacks onhumans and developing tools that can reduce the capture ofangler shark accidentally by trawlers distance.

"Our study shows that conditions are very different from thebackground, and not the color, perhaps more important for the detection of objects by a shark," said the scientist who led thestudy, Nathan Scott Hart, from Unviersity of Western Australia.

"This may help us design a fishing attraction distance of lessattractive to sharks and to design swimwear and surfboardsthat have contrasting views lower for the shark, so do not be too` interesting 'for that animal, "said the researchers, asquoted by French news agency,

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