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Wirkungen von Silberkarpfen ( Hypophthalmichthys molitrix ) auf das Plankton in Flachgewässern nach Untersuchungen in Karpfenteichen. Influence of Silver Carp (Hypophthalmichthys molitrix) on Plankton of Shallow Waters According to Investigations in Carp Ponds
Author(s) -
Barthelmes Detlev
Publication year - 1978
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19780630309
Subject(s) - hypophthalmichthys , silver carp , plankton , zooplankton , overexploitation , stocking , fishery , eutrophication , environmental science , biology , fish <actinopterygii> , ecology , nutrient
No severe changes take place in the plankton of highly eutrophic non‐stratified water bodies up to a stocking rate of 1,000 Si 3 /ha. This rate gives additional yield of 200‐300 kg/ha. Stocking rates of 10,000 Si 3 /ha allow selective overexploitation of microphytoplankton incl. bluegreens and of nearly all zooplankton. Yield reaches in this case 1 t/ha in 1 m deep waters.