Apparently The Fish 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 findings have been broadcast on 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 andWestern Australia. The researchers found the most common type of light receptor cells 'rod', which is very sensitive to light and allow view sand at night but could not parse color.

But sharks lack cone cells, which react individually to light at specificwavelengths. In the human eye, a variety of cone cells help us todistinguish colors. In 10 of the 17 species of shark, not found in the cells'cone' that at all. Tues cone was found in seven other species, but it's just one kind, and sensitive to the wave length of about 530 nanometers,which is green.

Retinal system that means the shark can distinguish between shades of gray but, very probably, not the color, the researchers said. In the marineenvironment, where colors are progressively filtered in the depth andsurvival depends on the ability to distinguish colors that are very opposite, in order to ascertain whether some form of darkness is avictim or predator. Monochromatic views are very rare among terrestrial species.

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

The study, published in English in a German journal,Naturwissenschaften, can help prevent shark attacks on humans anddeveloping tools that can reduce the capture of angler shark was accidentally discovered by long-distance trawlers.

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

"This may help us design a fishing attraction distance of less attractiveto sharks and to design swimwear and surfboards that have contrastingviews lower for the shark, so do not be too` interesting 'for that animal,"said the researchers, as quoted by French news agency AFP.