In a nutshell...food. A bass wont grow without eating SOMETHING. Bluegills, or the generic, southern curiosity, perch. Even other bass. They're growing to that size because of forage. And I'm willing to bet that something else population size-wise is out of the range of what might be considered "normal" or "balanced".

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.