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So which is it? Do populations expand to the limits imposed by resources, or are they self-regulated to prevent this from happening?

I know what Darwin said. I know what's been observed. You seem to be attempting to claim both are true. I hope we shan't have to consult wiki on the possibility of two mutually exclusive things being true at the same time. I suppose it's difficult for you to choose between faith and science, so take your time.

I'm a tad curious. I did say "take your time"; but I'd like a status report: Is my question being ignored, or is there an intent to answer it?

Dark Matter + Dark Energy = Dark Truth

"We find that such evidence demonstrates that the ID argument is dependent upon setting a scientifically unreasonable burden of proof for the theory of evolution." - Judge Jones Kitzmiller case
http://www.talkreason.org/articles/Falsify.cfm

"To Compel A Man To Furnish Funds For The Propagation Of Ideas He Disbelieves And Abhors Is Sinful And Tyrannical." - Thomas Jefferson

"And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are the gift of God? That they are not to be violated but with his wrath?" - Thomas Jefferson