I'd get the lake electroshocked as soon as possible and then develop a fishery plan. During the electroshock survey, you can remove every LMB that is shocked. That will give you a jump start on getting the stunting problem solved.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).