The idea of single sex fisheries is interesting and has been done successfully. It is not easy though. Many studies prove just how hard it is to correctly id and sex different species. Most times even the experts have low (70%) correct results. The smaller the fish the harder to do correctly. One example was a small lake in GA done as an experiment by Fishery Scientists. By year 3 the single sex LMB fishery revealed numerous 4-6 inch LMB yoy. Good thing about small waters is they are relatively easy to change directions upon an unforeseen event like a failed single sex experiment.