Electroshocking doesn't bring up every fish, nor does every shocked fish float. Some sink.

I doubt you lost all 200 LMB, but do agree you should have seen more during the shocking.

Also, I don't think that 10" fish from fingerlings in 6 months is unreasonable, and 1 lb or 13" at a year old is not unrealistic.

If you were harvesting those 10" LMB, I think you were taking out your original stockers.