With realistic respiration and excretion rates, two out of our three metazoans functional species exhibited realistic diapause patterns. Our smallest species (1103µm ESD, Figure 2A) left the depth to graze at the surface in mid-spring, which would be comparable with the arctic species Calanus glacialis. Our second metazoan functional species (1635µm ESD, Figure 2B) left the depth to reach the surface in late spring/early summer, which compares with a pattern observed for Calanus hyperboreus in the Amundsen gulf and the Beaufort Sea (Dezutter et al. in Press). The Figure 3, focusing on the second metazoan functional species, shows how the biomass accumulation and the vertical migration are driven by the C:N evolution. By using the simple low and high C:N thresholds related to lipids concentration observed in the field \cite{Forest_2010}, we could reproduce a rather complexe dynamic. Furthermore, the use of a realistic temperature allowing the formation of a thermocline in summer at 40m creates two different populations with two different metabolism rates. Above that thermocline, the metabolism of the metazoans functional species is faster explaining why they go into diapause earlier than the population below the thermocline. Then with the diffusion of the population below the thermocline towards the surface and weaking of that thermocline, a second cohorte will accumulate lipids at the surface where it will ultimately go into diapause later in the season. Such dynamic could represent what is observed in the field with the more advance ontogenic stages as C-IV and C-V that only stay at the surface for a short period, whereas the younger onces as the nauplii, C-I to C-III will stay longer at the surface in order to grow either bigger or into a next ontogenic stage before to go into diapause \cite{Darnis_2012a,Darnis_2012}. Furthermore, when the second population goes into diapause, the C:N ratio of the diapause phase is not particularly affected which by extension did not particularly affected the timing of the exit of diapause. That is the reason why this two-population dynamic suggest that our implementation should be robust in a 3D configuration. Nevertheless, the key process needed to have a re-occuring realistic diapause pattern was the synchronism between the metazoan functional species and its prey.