Thanks for that, jpsdad.
Steve, This was a comment from the above mentioned article..
" Did you know that the "energy density" of crayfish is low? By that, we mean calories per unit weight of crayfish. Fishes tend to be much higher in energy density, with some oily fishes such as shad or smelt being very high. So, a smallmouth bass eating a certain same weight of fishes will grow faster than one eating the same weight of crayfish.
