Diapause, performed by Calanus copepods can be found in every highly seasonal environment (Poles and upwellings, ). It allows them to avoid situations that would impede growth, reproduction or even survival (“[...]to bridge periods of environmental harshness.”, \citealt{Dahms_1995}, \citealt{Falk_Petersen_2009}). Such situations would be mostly food depleted environments or periods of time \cite{Conover_1991}. Since these situations occur in winter at high-latitudes it is often said that individuals in diapause are over-wintering (but we can also find species of copepods over-summering at low latitudes \citealt{Wang_2016}). The individuals are dormant at certain depth during the harsh season and rely on their lipid reserves. As soon as the pulsed productive season starts, they go at the surface and feed on the primary producers and the micro-zooplankton. It is at that time that they accumulate lipids (either directly from their prey or by biosynthesizing them, \cite{Kattner_2007}) in the form of esters. These species will at the end of the bloom, or even before the end of the bloom for some developmental stages, go at depth and wait until the next productive season \cite{Darnis_2014}.