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Different methods have been used to estimate the daily intake of submerged macrophytes by roach and rudd in some eutrophic lakes. The daily rations decrease linearly with the increasing size of fish. For the probable version, under natural conditions, it is a decrease from 15.5% for fish of a body length 11 cm to 7.7% fresh body weight for fish of a body length 24 cm.
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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.