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Butterfly shows evolution at work

Posted on Saturday, 14 July, 2007 | Comment icon 10 comments | News tip by: Waspie Dwarf


Image credit: Julia Margaret Cameron
 
"Scientists say they have seen one of the fastest evolutionary changes ever observed in a species of butterfly."

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 Source: BBC News


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Recent comments on this story
Comment icon #1 Posted by jdlsmith on 14 July, 2007, 19:39
Odd... and why don't they think this is merely an example of survival of the fittest? It's really quite clear that not all males were killed, so either some weren't exposed, and somehow they decided they needed to evolve to counter something they hadn't experienced, or some males have always had the resistance to the bacteria. Now the ones that didn't have that resistance are dead. I'd believe it was evolution if I was inclined to believe fairy tales...
Comment icon #2 Posted by questionmark on 14 July, 2007, 19:43
Odd... and why don't they think this is merely an example of survival of the fittest? It's really quite clear that not all males were killed, so either some weren't exposed, and somehow they decided they needed to evolve to counter something they hadn't experienced, or some males have always had the resistance to the bacteria. Now the ones that didn't have that resistance are dead. I'd believe it was evolution if I was inclined to believe fairy tales... Evolution is not the survival of the fittest but the survival of those most adaptable to change. Getting a bacterial infection is change. Gett... [More]
Comment icon #3 Posted by jdlsmith on 15 July, 2007, 4:01
Evolution is not the survival of the fittest but the survival of those most adaptable to change. Getting a bacterial infection is change. Getting resistant to a bacterial infection evolution as scientists define it. that means that you believe a butterfly not able to survive the bacteria did not encounter the bacteria yet evolved to defeat the bacteria it had not encountered?? LOL
Comment icon #4 Posted by jdlsmith on 15 July, 2007, 4:03
that means that you believe a butterfly not able to survive the bacteria did not encounter the bacteria yet evolved to defeat the bacteria it had not encountered?? LOL I suppose you also believe the black moth white moth incident was evolution as well?
Comment icon #5 Posted by rosenrot on 15 July, 2007, 4:58
that means that you believe a butterfly not able to survive the bacteria did not encounter the bacteria yet evolved to defeat the bacteria it had not encountered?? LOL No. Most likey what happened was the 1% of butterflies that were alive carried the gene that saved it from the bacteria. They were able to survive and therefor pass on thier DNA to later generation. It's not the butterflies never encountered the bacteria; they did, they survived.
Comment icon #6 Posted by jdlsmith on 15 July, 2007, 22:25
No. Most likey what happened was the 1% of butterflies that were alive carried the gene that saved it from the bacteria. They were able to survive and therefor pass on thier DNA to later generation. It's not the butterflies never encountered the bacteria; they did, they survived. So you're saying it was not a gain in genetic info, but a loss? That those who had a different genetic makeup died out and the species now has less variety? Edit: Sounds more like devolution than evolution to me.... but that same devolution is apparent all over the earth. JS
Comment icon #7 Posted by questionmark on 15 July, 2007, 22:34
Edit: Sounds more like devolution than evolution to me.... but that same devolution is apparent all over the earth. Which is also part of evolution. If you need to survive by going two steps backwards the species will, see the Flores man or the dolphin.
Comment icon #8 Posted by jdlsmith on 16 July, 2007, 19:52
Which is also part of evolution. If you need to survive by going two steps backwards the species will, see the Flores man or the dolphin. regress is a part of progress?
Comment icon #9 Posted by questionmark on 16 July, 2007, 20:27
regress is a part of progress? And here is what most people don't understand about evolution. It is not about progress, it is about survival. Every organism pro or regresses as needed to occupy a niche that is left vacant in order to survive. Sometimes it displaces other organisms out of that niche. The Flores man, for example is maybe the most drastic example of a regression, but not the only one.
Comment icon #10 Posted by Primeval on 16 July, 2007, 20:31
If only we could start evolving. Some hope perhaps.


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