Fish growth: Bertalanffy k is proportional to reproductive effort

By comparing the Bertalanffy descriptive growth equation (BG) with a reproductive-allocation growth (RAG) equation, I show that the BG k parameter is approximately equal to about 0.55 times the proportion of an adult body mass given to reproduction per unit of time, the reproductive effort; thus, k may be useful in predicting average fecundity. This also means that the Beverton-Holt k/M dimensionless number is really a lifetime reproductive allocation since the average adult life span is about 1/M years.