The wavelet analysis (Fig. 6) was performed on the mesozooplankton dry weight 10-year long time series (Fig. 11) and shows semi-annual and annual signals, the latter being more pronounced at the beginning of the survey. In spite of high variability, Fig. 10 shows a double maximum in spring (November–December) and fall (March–April) and a minimum in winter, contrasting with the chlorophyll a maximum.