Determination of dynamic zooplankton characteristics of the lake Onego

The dynamic zooplankton characteristics in the annual cycle were calculated based on the average year-to-year seasonal dynamics trajectories. The analysis showed that the seasonal curves reflect the biologycal features of the zooplankton groups: Crustaceans and Rotarians. The maximum biomass growth rates of the both groups were observed at the same time, approximately 195 days from the beginning of the year. In the both groups the biomass peaks and zero growth rate were separated by 10 days. The maximum intensity of biomass growth complies well with daily P / B-coefficients of mass species of crustaceans and rotifers. It was shown that water temperature influences the dynamic zooplankton parameters stronger in the spring than in other seasons.