DNA changes in hatcheries, interesting.

[Zoaelite]

Originally Posted by TimT

Interesting... looks like they found proof that epigenetics does indeed change the underlying DNA. So much for genetic change taking millions/billions of years... more data that doesn't support evolution.

Without access to the actual study I'm inclined to believe another factor is in play that the researchers might not be accounting for.

Many fish species have been observed to undergo adaptive phenotypic gene plasticity. Pretty much a large word for "we have hidden genes you don't know about".

Under adverse or different conditions epigenetic factors cause the phenotypic expression of said genes, something that actually takes a generation or two to occur (very much like the posted study).

If you want to read about gene plasticity in fish here is a good article:
http://www.ncbi.nlm.nih.gov/pubmed/22673650

As far as epigenetics effecting the "code" of underlying DNA, I don't believe the authors show any link between the two. We know that epigenetics has a great effect on the overall phenotypic expression due to... well epigenetic factors (methylation of DNA or genetic "switches") but the ability to physically CHANGE the genetic code is... evolution and in this case its not rapid (punctated equilibrium) its just the emergence of an older gene pool through gene plasticity.

Originally Posted by TimT

So much for genetic change taking millions/billions of years... more data that doesn't support evolution.

Now your playing a really interesting card here Tim, I'm always open for a good discussion so if you would be so kind to elaborate your thoughts on this statement?