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Posted by GyrFalcon on April 22, 2003 at 07:49:55:
In Reply to: Re: Hybrids.... posted by oldherper on April 21, 2003 at 16:16:33:
I was reading in my biology text book and here is what it had to say on hybridization:
"...one study found that more that 50% of the plant species surveyed in california were not well defined by genetic isolation. for example, fossil records indicate that balsam poplars and cottonwoods have been phenotypically distinct for 12 million years, but throughout time they have routinely produced hybrids..." (Raven/Johnson, 474)
Biology, Sixth Edition, Raven/Johnson copyright 2002, 1999, 1996 by mcgraw-hill companies
I know that talks about plants, but the book also indicates that 10% of the worlds 9500 species of birds have been known to hybridize in nature. Galapagos finches hybridize as well. It says that 2% of medium ground finches, and 1% of cactus finches mated with other species every year. (Raven/Johnson, 475)
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:I'm not speaking for Paul here...he's more than capable of doing that himself. (I assume you were asking Paul that question).
:I did want to say one thing about your question, though. I don't know of any hybrids that occur naturally in the wild. Remember, when we say hybrid, we're speaking of true hybrids, which would be cross-species or cross genus, such a "Sinacorns" (L.t.sinaloae x E.g.guttata) or "Jurassic Milksnakes" (L.t.ssp x god-knows-what). These types of crosses do not occur in the wild as far as I know. These are always "man-made" crosses.
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::Are you giving a thumbs down on hybrids in general? Including hybrids that occur naturally in the wild? Or just hybrids that are produced by man?
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