The shark it turns out color blind

 

The scientists in the journal Naturwissenschaften do research on sharks. From these results, obtained astonishing results, that sharks are color blind turns.

To get that conclusion, researchers conducted observations on sharks eye by using micro-spektofotometri. They observed the cells making up the retina of the eye at 17 shark species caught in the Queensland and Western Australia.

They found that 10 of the 17 species of sharks do not have a cone-shaped cells, cells that play a role in distinguishing colors. Meanwhile, seven other species have only one type of cone cells, which are sensitive to the type of green (530 nanometer wavelength).

The scientists found that most species of sharks have only rod-shaped cells. These cells are very sensitive to light, were able to distinguish color contrast and allows vision. However, the cell is not able to distinguish colors.

"Our results indicate, compared with color, contrasting with the background may be much more important for the sharks to identify objects," said Nathan Scott Hart, leader of the research project from the University of Western Australia.

In an interview with AFP yesterday, he said, "This knowledge may help us to design fishing equipment, surfing equipment and swimwear that is less attractive in the eyes of a shark." It can prevent the possibility of human to predation by the sea predators.

The ability to distinguish colors is relatively unimportant for sea animals. In the depths of the ocean, the color will fade and disappear. Previously, other researchers have also found that dolphins, seals and whales are also only has cones sensitive to green.


Source:  AFP  

Related Info: