鲨鱼天生是色盲无法辨认蓝色-英语点津

鲨鱼天生是色盲无法辨认蓝色

Wearing a light blue wetsuit that matches the colour of the sea will make you less likely to become the victim of a shark attack, according to researchers. Sharks are completely colour blind and only see things clearly if they are mostly light or dark, scientists have claimed. In a breakthrough that could prove hugely beneficial to divers navigating shark-filled waters, scientists found that the predator - like dolphins, seals and whales - is unable to distinguish between colours. Costumes or wetsuits that camouflage swimmers' bodies in the sea water are less likely to draw a shark's attention than ones with bright, solid colours than emphasise their outline.

都说鲨鱼很凶悍，杀人不眨眼，可日前专家经研究证实，倘若身穿“淡蓝色或与海水相近颜色”的泳衣在海底与鲨鱼“亲密接触”，可以大大降低被鲨鱼以及鲨鱼群攻击的几率。据悉，鲨鱼是“色盲”，它们只能看得清楚深色或者浅色的海底生物，与海水相近颜色的事物一概看不清。此外，科学家还针对其他海底生物进行了研究，比如海豚、海豹、以及鲸鱼等等，这些海中巨兽都不能分辨海底颜色。科学家建议，倘若要拍摄鲨鱼在海中生活情况，不要穿可以在海中“强调身体曲线”颜色的泳衣，深色泳衣、亮色泳衣尽量要避免。要很好的伪装自己，只要穿连体的和海水相似颜色泳衣就可以了。

Professor Nathan Hart, from the University of Western Australia, said: 'It's the high contrast against the water rather than the colour itself which is probably attractive to sharks.' So you should wear perhaps more muted colours or colours that match the background in the water better.' The researchers examined the eyes of dead sharks and found they had only one type of photoreceptor in the retina, indicating they could only see in monochrome.

来自澳大利亚的教授内森·哈特说：“鲨鱼会对和海水颜色有明显区别的物体产生兴趣，所以，与海水相似颜色的泳衣在鲨鱼的眼中可以算是‘隐身衣’了。”据悉，研究员对死去鲨鱼的眼中的视网膜感光性能研究后发现，鲨鱼只能看得见‘单色’，眼中只有能否分辨出单一的视网膜。

The US Navy has conducted tests that suggested sharks were able to see yellow most clearly. The tests had been to see what would be the best colour for the lifejackets that pilots wear in case they have to eject and splash down in the ocean. Professor Hart said it was more the high contrast of yellow, not the colour itself, that would increase the visibility for sharks. He said: 'It may be possible to design swimming attire and surf craft that have a lower visual contrast to sharks and are therefore less attractive to them.' The study by researchers at the University of Western Australia and the University of Queensland, is to be published in the German nature journal Natur wissenschaften (Science of Nature).

美国海军研究发现，最让鲨鱼感到“兴奋”的颜色竟然是“黄色”，这个测试是为了发现哪种颜色最适合做“救生衣”。哈特教授说：“并不是因为黄色鲜艳而容易被鲨鱼发现，而是黄色与海水的淡蓝色形成的强烈反差效果吸引着鲨鱼。”据悉，这一系列对于海中颜色的研究大大启发了设计海底救生船以及救生衣的科学家，这些研究将在《德国自然杂志》上发表。