alexa Freshwater fish, amphibians supercharge their ability to see infrared light

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Freshwater fish, amphibians supercharge their ability to see infrared light

Salmon migrating from the open ocean to inland waters do more than swim upstream. To navigate the murkier freshwater streams and reach a spot to spawn, the fish have evolved a means to enhance their ability to see infrared light.when salmon migrate from the ocean to inland streams, they turn on this enzyme, activating a chemical reaction that shifts the visual system, helping the fish peer more deeply into murky water.As it turns out, the enzyme -- called Cyp27c1 -- is closely linked to vitamin A, long known to promote good vision, especially in low light. The enzyme converts vitamin A1 to vitamin A2; the latter has remarkable properties to enhance the ability to see longer wavelength light such as red and infrared light.

 
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