The CNBG will outspawn the GSF, but in a predator free pond the bigger mouth and increased aggressiveness of GSF allow them to dominate under most conditions. They eat the smallest baby bluegill preventing them from become large spawning bluegill. They can also survive and thrive under much worse water conditions. However with a predator like LMB, small bass compete with GSF and big bass eat them, and they are a bit easier to swallow than BG. Combined with their once annual reproduction rate, they just simply cannot reproduce enough to handle the predation pressure that BG can, and even a 12” bass can eat adult GSF. Whether or not your bass reproduce successfully with have a big influence on what happens next, but if they do reproduce you eventually won’t have much of a forage pond left but I truly doubt they will completely clean out all the fish that size.
