@misc{Pieczyńska_Ewa_Experimentally_1973, author={Pieczyńska, Ewa}, editor={Polish Academy of Sciences, Institute of Ecology}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Warszawa}, howpublished={online}, year={1973}, language={eng}, abstract={The eulittoral zone is on the average 7% of lake surface and has a high biomass of invertebrate fauna used as food by fish. The availability of this zone decreases in summer due to overgrowing, drying and oxygen deficits. The shore zone area unaccessible in some periods for fish is 11% of the lake surface.}, type={Text}, title={Experimentally increased fish stock in the pond type lake Warniak. 11, Food resources and availability of the eulittoral zone for fish}, URL={http://rcin.org.pl/miiz/Content/72623/PDF/WA058_86606_P2840-T21_Eko-Pol-A-Nr-37.pdf}, volume={21}, number={37}, journal={Ekologia Polska}, publisher={Państwowe Wydawnictwa Naukowe}, keywords={freshwater fishes, ecology, nutrition, fish culture, Pisces}, }