I don't have a clue. Or do I? I think I can come up with a strong hint. Look at any "natural" older body of water, and you will find many more species of forage fish in the food chain than a recreational pond. However, a great fishing natural lake is not necessarily as good or as desirable as a great fishing recreational pond.

Having worked with statistics for 35 years, I would think 4 or 5 species of forage fish would increase the chances for any 1 of them to succeed in finding a niche in the pond's ecosystem. You know, finding cover, food, and reproducing.