MNFISH, how did the bullhead get back in after rotenone?
My ponds are dug outs and surrounded by wetlands. These BOW's are filled with "trash" fish (BH,stickleback,mud minnows, darters, ect). I'm guessing a high water event(s) but truly unknown. LMB and WE have since mitigated the bullhead problem in my ponds.
Side note: In the spirit of the phrase lemons make lemonade, I have been using fish combinations in smaller ponds that utilize BH as forage.
