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National Repository of Grey Literature

4 records found

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	Influence of humic substance HS 1500 on tolerance of Sterlet to nitrite BULÍČEK, Vojtěch The aim of the thesis was to assess the effect of humic substance HS 1500 on the tolerance of Sterlet (Acipenser ruthenus) to nitrite. Preparation Huminfeed was used as a source of substance HS 1500. Tolerance of Sterlet to nitrite was assessed on the basis of the results of acute toxicity tests and the results of haematological and biochemical blood examination of fish that were exposed to increased concentrations of nitrite in the presence and absence of preparation Huminfeed. Detailed record
	Effects of pesticide on haematological and biochemical blood profile on fish DORT, Hynek Cílem práce bylo zhodnotit vliv pesticidů na bázi triazinů (účinná látka metribuzin) a pyrethroidů (účinná látka bifenthrin) na kapra obecného (Cyprinus carpio) na základě výsledků testu akutní toxicity a výsledků hematologického a biochemického vyšetření plazmy. Hodnota 96hLC50 pro přípravek Sencor 70 WG (s účinnou látkou 70% metribuzinu) byla 250,2 mg.l-1. U kapra obecného po 96h expozici v koncentraci 250,2 mg.l-1 Sencoru 70 WG došlo k významnému snížení (p<0,01) celkových bílkovin, triglyceridů, laktát dehydrogenázy, anorganického fosfátu, hodnot hemoglobinu, hematokritové hodnoty, středního objemu erytrocytu, počtu leukocytů. a významnému zvýšení (p<0,01)glukózy, amoniaku a vápníku. Hodnota 96hLC50 pro přípravek Talstar 10 EC (s účinnou látkou 100 g.l-1 bifenthrinu) byla 57,5{$\mu$}g.l-1. U kapra obecného po 96h expozici v koncentraci 57,5{$\mu$}g.l-1 Talstaru 10 EC došlo k významnému zvýšení hodnot (p<0,01) u glukózy, amoniaku a aspartát aminotransferázy. Pesticidní přípravek na bázi triazinů Sencor 70WG byl zařazen mezi přípravky, které můžou vyvolat dlouhodobé nepříznivé účinky ve vodním prostředí. Pesticidní přípravek na bázi pyrethroidů Talstar 10 EC byl zařazen mezi přípravky, které jsou vysoce toxické pro ryby. Detailed record
	Toxicity of selected substances for spiny-cheek crayfish MAHOVSKÁ, Ivana The thesis examined the toxicity of selected compounds for spiny-cheek crayfish (Orconectes limosus) in laboratory conditions. Tested the acute toxicity of the insecticide Diazinon 60 EC and herbicide Roundup Biaktiv. Tests were chosen to juveniles spiny-cheek crayfish (Orconectes limosus), and juvenile and adult specimens of signal crayfish (Pacifastacus leniusculus).These species of crayfish have been selected as an easily accessible model organism. Both species of crayfish spreading and in Europe they are unoriginal. Work focused on the observed toxicity of these substances on spiny-cheek crayfish and signal crayfish and the demands on the quality of the environment. Detailed record
	Influence of water temperature on toxicity of free ammonia for fish and on amount of ammonia produced by fish MECKO, Jozef Determination of acute toxicity of free ammonia for fish in dependence on water temperature and determination of production of ammonia by fish in dependence of water temperature It was made a test of acute toxicity on akutní toxicity on Poecilia reticulata according to ČSN EN ISO 7346-2 and determination of acute lethal toxicity of substances for fish. Next was made test on excretion of ammonia by common carp in different temperatures of water. Fish were divided after a two pieces into basins.The water temperature was kept in basins on two level. Next test was realized in a similar way with a difference, that an amyloid gel with an addition of NH4Cl was aplicated by a probe to the digestive tract of fish. To control fish were aplicated the amyloid gel without an addition of NH4Cl. It was observed concetration of ammonia in water and the fish were bleeded to set haematocrit and biochemical values. On grounds of these values will be analyzed production of ammonia by one species of fish in dependence on water temperature. Detailed record

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