I have fished a private lake here in Lincoln that had an overabundance of GSfish and not enough LMB to wipe them out or keep them under control. In fact the GSfish were so abundant that they kept the LMB reproduction to almost nothing. The interesting thing is that I would consider most the LMB in this lake to all be "Magnums" where 17-18" LMB regularly wieghed 5 lbs or better and LMB's under 15" were seldom caught. Things have changed at this lake in the last four years with emergence of aquatic vegetation and the introduction of some adult BG which is a totally different story. Bottom line is that if there are enough GSfish present without any aquatic vegetation, their agressive nature could significantly limit LMB reproduction. The presence of aquatic vegetation for fry to hide in will change that though.