The range of data represented in the figure 1A were extracted from 6 publication (Auel et al. 2003, Ikeda et al. 2001, Hirche 1987, Båmstedt & Tande 1985, Alcaraz et al. 2010 and Ikeda & Skjodal 1989) dealing with metabolic demand or respiration of polar copepods and allowing us to calculate mass-specific respiration rates. The whole data set (n=59) comprise respiration rate for four of the main Arctic/North Atlantic species (C. hyperboreus, C. glacialis, C.finmarchicus, Metridia longas) plus data for Arctic zooplankton community (Alcaraz et al. 2010). These data were standardized to 0°C. The red dots correspond to the daily respiration rate of the three numerical metazoans present in the model. These values (1.18e-2, 8.39e-3 and 5.94e-3 mmol C mmol C-1 d-1) are well within the range of respiration rate given by the literature. The same process was applied for the nitrogen excretion rates of the Figure 1B. Focusing on data of species known to do the diapause, we used 5 publication (Ikeda et al. 2001, Head et al. 1988, Båmstedt & Tande 1985, Alcaraz et al. 2010 and Ikeda & Skjodal 1989, n=40). The first red dots (6.08e-2 mmol N mmol C-1 d-1) seems to be slightly over the main range of literature values while the latter two red dots (4.96e-2 and 4.05e-2 mmol N mmol C-1 d-1) are within this range.