علوم
ألواح التزلج المضيئة قد تؤدي إلى ردع أسماك القرش
November 13, 2024 - يعتقد العلماء الأستراليون أنهم ربما ابتكروا طريقة لردع أسماك القرش الأبيض الكبير عن مهاجمة راكبي الأمواج وغيرهم من رواد سطح البحر باستخدام الضوء.
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Researchers from Macquarie University in Sydney, Australia, think they have devised a way to help surfers avoid attacks from great white sharks.
According to studies, like most sharks, great whites are probably completely colour blind and have poor visual acuity.
Unfortunately, this means that the silhouette of a surfboard or a human in the water looks similar to that of a seal – making the great white responsible for most human shark-bite fatalities.
However, experiments conducted in Mossel Bay, South Africa, show that placing strips of LED lights perpendicular to the direction of travel of seal-shaped foam decoys confused the sharks by breaking the silhouette into unrecognisable abstract shapes – stopping them from attacking.
The “counterillumination” strategy is inspired by nature whereby the juvenile plainfin midshipman fish which has photospores on its underside that produce light and disrupt the shape of its silhouette.
Researchers are now building prototype surfboards and kayaks with lighting strips embedded into their underside ahead of new tests.