16
Jan
11

Fly Fishing: Trout’s Color Perceptions

Jerry at Trout U~Fish Smarter writes a thought provoking piece re a trout’s color perceptions relative to water clarity. Worth a look see and an experiment or two.

1. Trout do indeed have color vision, but it is limited to relatively clear, shallow, water and short distances, so at close range, the trout can see the full detail of color.
2. Trout can discern differences in shades with the highest in blue, then red and then green shades.
3. The color red appears brighter than it does to humans, but quickly becomes black at greater distance.
4. The ability to detect color is greatly impaired and completely eliminated within 12 feet.
5. Impurities in the water or stained water makes colors less significant, but under these conditions, white will remain the best.
6. In the low light conditions of dawn or dusk, trout can not distinguish color. Black, then, becomes the most visible.

I highlighted a similar piece in April of 2008 that is equally interesting entitled Trout’s Vision…The Ultralight Factor.

The Universe’s Spectrum and the place of Green…interesting too.


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