Such a dynamic could theoretically be followed by looking at the evolution of the Carbon to Nitrogen content ratio (C:N ratio) of an individual. We will use this ratio in order to estimate the phase (active/in diapause) of the copepods-like community. The active phase will have a nitrogen excretion and an active respiration rate whereas the in-diapause phase will not excrete nitrogen and have a reduced respiration. A proper representation of the metabolic processes in relation with the lipids accumulation will be one of the keystone to reproduce the entry and the exit of diapause.