If you are catching numerous HBG in traps that is a good indication that they are likely significantly reducing the numbers of small YP in the 1/2" to 1" sizes. They are aggressive with large appetites. If you think the recruitment of YP is low, consider doing some ladder stocking of 5"-7" YP to bolster their population so the number of egg ribbons are plentiful until you get the HBG population significantly reduced and you begin to see 3"-5" YP in the catches/sampling.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management