Antarctic krill (Euphausia superba) population model flow chart of monthly computations (here December of the 8^th year) in a given ten-year simulation.

Summer recruitment is simulated by releasing a random number of recruits each year in the population (25% in November and January and 50% in December). For each individual, mortality, growth and capture are computed sequentially (see text for details), and, all individuals available for capture are included in the computation of length-based recruitment indices.