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Caring about appearances.

Discussion of everything related to the Theory of Evolution.

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Postby mith » Fri Oct 05, 2007 4:08 am

I think it requires a lot more brain cells to choose. Plus given that mating has such low costs in these simpler life forms, there might not be much incentive to pick healthier or unhealthier.
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Postby alextemplet » Fri Oct 05, 2007 4:29 am

It's possible, I suppose. A lot of the traits we consider attractive (intelligence, physical strength, agility, etc.) would've been very useful to survive in the wild. A lot of tribal initiation rituals are designed to test a youth's ability to survive and be able to hunt or fight, both useful skills. I suppose it's possible that, in an environment requiring more speed to survive than strength, or vice-versa, people might be able to recognize this and choose mates with the necessary qualities.
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Postby kotoreru » Fri Oct 05, 2007 2:24 pm

i am breeding pill bugs to become yellow. if i change the environment to be yellow, the pill bugs *if they have any sort of cognition that would be required for selecting a mate, that is* would be more attracted to the ones with the most yellow, since they blend in better?


Do pill bugs choose mates, then? I doubt it's through visual cues somehow. To get the kind of change in allele frequencies you want, you need a selective pressure e.g. a predator that has a harder time finding yellow pill bugs.
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Postby mith » Sat Oct 06, 2007 2:27 am

Or artificial selection
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Postby AstusAleator » Wed Oct 10, 2007 12:29 am

Just a thought I had while reading this:
Someone mentioned the "costs" of mating/reproduction. This made me think of the relatively high "cost" or difficulty that humans have with child birth and rearing. It would make sense that a female would select a male that looks like he can support her through the birthing and rearing processes. But then again, perhaps we evolved in settings where birthing mothers grouped in their own female cohort, or the elderly provided that support... just a random thought.
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