Size- and Trait-Based Model of a Single Stock

We combine life-history invariants, metabolic scaling rules and size-spectrum theory to develop a general size- and trait-based theory for demography and recruitment of exploited fish stocks. The theory is based on classic metabolic relations at the individual level and uses asymptotic size W∞ as the governing trait. The model is implemented as a web-application where the impact of fishing with different size selectivity on yield, spawning-stock biomass, stock structure and recruitment can be simulated and used to evaluate fisheries reference-points, in particular Flim and Fmsy.