Everyone agrees that the three factors are predation by redfish, higher water temperature and lower oxygen content. People don't agree on which one is the most important factor, but if you're asking me what I think personally, I think that predation by redfish is the most important factor.
There are four areas where the stock is found. The estuary zone in the gulf is the one area where the stock is in relatively good health and the biomass is in better shape, and that is the one area where there are few or no redfish.