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Dreissena polymorpha (Pall.) biomass was estimated in 21 Masurian Lakes. The big differences in its values found in particular lakes were mainly connected with different abundances of this mollusc and to some extent with the age structure of the population and the "condition" of individuals. Annual production of total animal biomass fluctuated considerably in particular reservoirs. P/B coefficients were contained between 0.42 and 0.81.
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Projects co-financed by:
Operational Program Digital Poland, 2014-2020, Measure 2.3: Digital accessibility and usefulness of public sector information; funds from the European Regional Development Fund and national co-financing from the state budget.