Can somebody please come up with the science that says hatcheries have no impact on our wild fish? {I seem to remember cw having some info to the opposite?}

I have seen lots of studies that say that the introduction of non native fish have a negative impact on our struggling native fish but have not seen any science to support alot of the thought on this board at present.

People keeping pointing fingers at all the other factors,logging habitat degradation,too large of comercial quotas,etc,all important factors, but do not want to acknowledge that the hatcheries are one of them.Hell even long live the kings acknowledge that our hatcheries have serious problems.