Read this link for telling male from female BG and RES an excellent thread started by Dr. Bruce and joined in by a host of PB experts. \:D It is much easier to tell when they are adults and very hard when small.

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=7;t=000214;p=1

Those #s of BG and FH will be ok for a 1 acre pond. Just be sure some of the transplanted ones are adult male and females. The predator #s for next year are high for the forage base esp. the LMB. Lets see what others say but my guess is a max of 25 LMB, 25 HSB, 30 YP and 25 CC. Adding them is easier than taking them out once they start reproducing.