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Rybniční hospodaření respektující strategii udržitelného rozvoje a podporu biodiverzity
Rybářství Třeboň, a.s. ; Český nadační fond pro vydru, Třeboň ; ENKI, o.p.s., Třeboň
Interní zprávy k projektu: Chmelová, Iva: Statistické hodnocení koncentrací N a P, chlorofylu, sušiny a uhlíku v sestonu (part. C) v letech 2008- 2011 intenzivně sledované lokality, Musil, Martin: Statistické hodnocení zooplasnktonu (biomasy stanovené jako sušina) v letech 2008 -2011 - intenzivně sledované lokality, Tesařová, Blanka: Měření fotosyntetické aktivity a stanovení čisté primární produkce, Fischer, David: Obojživelníci, plazi, Šimek, Matouš: Monitoring avifauny, Adámek, Zdeněk: Predační vliv kormorána velkého (Phalacrocorax carbo sinensis) na obsádky rybníků, Kadlečíková, Zuzana - Poledník, Lukáš - Poledníková, Kateřina: Monitoring škod způsobovaných vydrou říční.
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Fish Farming in Jindřichův Hradec region in the latter half of the 17th century
DVOŘÁK, Filip
Ponds, carp breeding and fish farming from the general point of view were an inseparable part of manor economy in the early modern period in Czech Lands. This thesis is aimed at the complex development of fish farming in the region of Jindřichův Hradec, specifically the manor of Kardašova Řečice, Červená Lhota, Stráž nad Nežárkou and Žirovnice. The author has concentrated mainly at the reconstruction of the local pond system and related issues. The other significant aspects are fish trade, technology of fish farming, everyday operation and distribution of natural salary. The thesis has proved the existence of complicated network of social-professional relations among the people participating in the whole production.
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Using of biocide Diazinon 60 EC in fish farming and its toxicity for fish and another water organisms
Máchová, J. ; Prokeš, Miroslav ; Faina, R. ; Kroupová, H. ; Svobodová, Z. ; Peňáz, Milan ; Baruš, Vlastimil
Diazinon 60 EC (chemical insecticide, organophosphate, active substance diazinon at a concentration of 600 g/l) is used in fish-farming in well-founded cases as a biocide to supress excessive propagation of coarse daphnian zooplankton (used concentration of Diazinon 60 EC 0,010 mg/l). Diazinon 60 EC is highly toxic for daphnian zooplankton (48hEC50 = 0,00029 mg/l by the using of artificially prepared adulterating water according to the standard and 48hEC50 = 0,0029 mg/l by the using of pond water). Toxicity of Diazinon 60 EC is markedly lower for other water organisms (96hLC50 for Poecilia reticulata, Cyprinus carpio and Orcorhynchus mykiss are in the range 3-10 mg/l and 72hIC50 for Desmodesmus subspicatus = 10 mg/l). At the concentration of 0,01 mg/l (i.e. 100 g per 1 ha at 1 m mean depth of the pond), Diazinon 60 EC can highly selectively eliminate daphnian zooplankton, causes no harm to fish and is reltively quickly decomposed in the aquatic environment.
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