Welcome to the PB forum mford .

First what else is in the pond and are you feeding? Second can you do a seine assessment of the BG population (or other forage)(see link below pgs 10 - 12 for what to look for) ? Do you see many 10-12 in LMB and if so what is their Wr ?. Have you charted the Wr over the last 2 years? See chart below for example of year class info from Wr chart. How old are the largest LMB ( ? 6.2 lb one) ?


http://msucares.com/pubs/publications/p1428.pdf




Usually harvest is of the group that is out of balance (or about to be). It starts most times with 10-12in LMB in year 4 in these parts. That is first evidenced by 2 things. One the reduction in forage of the size that group of LMB eats (3-4in BG for 12in LMB). Second the first sign that a size group of LMB is moving toward a lower Wr.