Re: orange flies

jcook@xxxxxxxxxxx (Jonathan Cook) wrote in news:e4igs1$go2$1
@bubba.nmsu.edu:

Personally, I think it most often does. There's good reasons we
see a spectrum centered on green, and good reason that most other
creatures see basically the same. But that's just IMO.

Jon.


Interestly enough, while evolution is driven by genetic changes that are
pretty damn near random, natural selection is far from random. Under
natural conditions, evolution is very much enhanced by some competitive
pressure that makes the mutation advantageous. If trout can see into the
UV, almost guaranteed that there was some evolutionary pressure that pushed
them that way, at least for some period during trout natural history. It
doesn't have to be hunting or food seeking. Maybe its something simple,
like the more UV you see, the closer you are to the surface, the more
likely you are to get eaten by a bird.


--
Scott
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