The commonality - time !

In newly built and stocked ponds it takes 18 mths to 24 mths to reach carrying capacity. The first fish stocked reach max results in 4-7 years (as a whole not individually) absent extensive management. This includes structure management.

Same for new reservoirs - carrying capacity longer as fewer fish per acre are stocked and up to year 7 fast growth then absent strong management, depletion, out of balance populations, slow growth and declining productivity.

While there are exceptions and unusual locations - it is basic biology.

The management is what makes the difference - not only carrying capacity or structure, which as concepts do matter. It is the application of management to all fishery concepts designed for the individual fishery that counts. As Bob often says its part science and part art.