Biotic structure and processes in the lake system of r. Jorka watershed (Masurian Lakeland, Poland). 9, Occurrence and distribution of molluscs with special consideration to Dreissena polymorpha (Pall.)
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The occurrence of molluscs in 5 lakes joined by the r. Jorka has been investigated. In all lakes the mussel Dreissena polymorpha dominated. This species varied greatly in particular lakes. D. polymorpha varied both as regards individual characters (size, shell and body weight, growth) and population characters (numbers of planktonic larvae and settled individuals, range of distribution, biomass, age structure).
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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.