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Original title:
Biomanipulační opatření na vodárenské nádrži Hamry - slabá odezva fytoplanktonu na redukci biomasy planktonofágních ryb
Translated title: Biomanipulation measures at the Hamry water supply reservoir - poor reaction of phytoplankton to planctivorous fish reduction
Authors: Jurajda, Pavel ; Adámek, Zdeněk ; Janáč, Michal ; Roche, Kevin ; Mikl, Libor ; Rederer, L. ; Zapletal, T. ; Koza, V. ; Špaček, J.
Document type: Papers
Conference/Event: 65 let výuky rybářství na Mendelově univerzitě v Brně, Brno (CZ), 2014-12-02 / 2014-12-03
Year: 2014
Language: cze
Abstract: One measure commonly used for improving water quality in open waters is biomanipulation of fish stock. Previous studies in shallow lakes confirm the importance of reducing cyprinid populations for increasing zooplankton. Empirical results from reservoirs, however, are scarce. The aim of this study was to evaluate the effect of an intensive reduction of cyprinid fishes and perch fry density between 2009 and 2013 on water quality in the Hamry drinking water reservoir. The abundance of common bream broodstock decreased by around 12 000 individuals over the five years, and biomass dropped below 20 kg.ha-1. Stocking with pike and zander proved less effective. In reservoirs similar to Hamry, reduction of bream biomass can be a highly effective means of increasing filtering zooplankton biomass. Phytoplankton dynamics, however, appear to depend on additional factors, with nutrient loading (especially phosphorus) probably playing the primary role.
Keywords: Hamry water supply reservoir; phytoplankton
Host item entry: 65 let výuky rybářství na Mendelově univerzitě v Brně, ISBN 978-80-7509-153-6
Institution: Institute of Vertebrate Biology AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0242624
Permalink: http://www.nusl.cz/ntk/nusl-180505
The record appears in these collections:
Research > Institutes ASCR > Institute of Vertebrate Biology
Conference materials > Papers
Translated title: Biomanipulation measures at the Hamry water supply reservoir - poor reaction of phytoplankton to planctivorous fish reduction
Authors: Jurajda, Pavel ; Adámek, Zdeněk ; Janáč, Michal ; Roche, Kevin ; Mikl, Libor ; Rederer, L. ; Zapletal, T. ; Koza, V. ; Špaček, J.
Document type: Papers
Conference/Event: 65 let výuky rybářství na Mendelově univerzitě v Brně, Brno (CZ), 2014-12-02 / 2014-12-03
Year: 2014
Language: cze
Abstract: One measure commonly used for improving water quality in open waters is biomanipulation of fish stock. Previous studies in shallow lakes confirm the importance of reducing cyprinid populations for increasing zooplankton. Empirical results from reservoirs, however, are scarce. The aim of this study was to evaluate the effect of an intensive reduction of cyprinid fishes and perch fry density between 2009 and 2013 on water quality in the Hamry drinking water reservoir. The abundance of common bream broodstock decreased by around 12 000 individuals over the five years, and biomass dropped below 20 kg.ha-1. Stocking with pike and zander proved less effective. In reservoirs similar to Hamry, reduction of bream biomass can be a highly effective means of increasing filtering zooplankton biomass. Phytoplankton dynamics, however, appear to depend on additional factors, with nutrient loading (especially phosphorus) probably playing the primary role.
Keywords: Hamry water supply reservoir; phytoplankton
Host item entry: 65 let výuky rybářství na Mendelově univerzitě v Brně, ISBN 978-80-7509-153-6
Institution: Institute of Vertebrate Biology AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0242624
Permalink: http://www.nusl.cz/ntk/nusl-180505
The record appears in these collections:
Research > Institutes ASCR > Institute of Vertebrate Biology
Conference materials > Papers
Record created 2015-01-19, last modified 2023-12-06