I have not seen reported data or studies stating that there is outbreeding depression in Fla X Northern LMB in the natural integrated zone SE US through TX. Not once in probably 200 studies has a scientist mentioned it. In addition I have not had a Fisheries Scientist or pond owner say they have encountered it in a private lake or pond.

The genesis of the idea came from genetic survey in IL and other northern states and did not deal with long term events but with stocking Fla in cold climates. The link earlier in this thread is the first time I have seen the subject brought up and IMO it is not a problem in the area mentioned (south US).