Few studies have looked at the modeling of the diapause trait and most of them were mostly interested into the understanding of it \cite{Maps_2011,Record_2013,MILLER_1998} rather than its impact on the biogeochemical processes. Furthermore, these models were Individual Based Models (IBM) whereas our research is the first (at our knowledge) to work in an eulerian context. Indeed, with individuals based models, it is easy to follow one individual internal state and then using it to trigger its migration within the water column. In our eulerian context, the plantonik biomass compartment is followed via biomass of nutrients associated to a whole population of a functional species. It is hard is such context to change the metabolic “states” of a population (notwithstanding the temperature). But when it comes to the diapause, the metabolism associated with the biomass of the copepod-like functional species should change from the active state to the diapausing state. These metabolism changes, scaled up to the population level should have an impact on the whole ecosystem. The is the reason why, for the past decade there have been a rising concern about taking into account the diapause trait and zooplankton vertical migration into biogeochemical models. Whether diel vertical migration (DVM, \cite{Hansen_2016,Darnis_2017,Berge_2009}) or ontogenic migration (diapause, \cite{Visser_2017,Darnis_2012,J_nasd_ttir_2015}) this trait seems to play a stringent role into the ecology and the biogeochemistry of our ocean. As an exemple, in the the Amundsen gulf \citet{Darnis_2012} have estimated that the carbon flux related to the ontogenic migration of Calanus species should be of the same magnitude of the carbon flux related to detritus sinking. A similar conclusion have been found by \citet{J_nasd_ttir_2015} for the North Atlantic. In our study the to key components governing the diapause trait were the respiration and the excretion.