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  • Nitrite is one of the most important toxicants to fish. Nitrite, a primary concern in fish hatchery with water reuse system, can accumulate to dangerous concentrations if biological filtration is compromised. The aim of this study was to verify the toxicity of nitrite for fish. In this study there were used tests of acute toxicity tested on Poecilia reticulata and laboratory experiments carried out on Nile tilapia (Oreochromis niloticus). Influence of nitrite on blood methemoglobin content was evaluated during laboratory experiments with Nile tilapia.The 96hLC50 values of NaNO2 for Poecilia reticulata range between 39 - 436 mg.l-1 depending on chloride concentrations (10 - 190 mg.l-1) and the relationship between these values is linear. Elevation of chloride concentration to the value of 250 mg.l-1 did not cause elevation of 96hLC50 value.The experiments carried out on Nile tilapia (Oreochromis niloticus) showed: Only 3-h exposure to 36 mg.l-1 NO2- in chloride poor water (10 mg.l-1) - group 1 - cause
  • Nitrite is one of the most important toxicants to fish. Nitrite, a primary concern in fish hatchery with water reuse system, can accumulate to dangerous concentrations if biological filtration is compromised. The aim of this study was to verify the toxicity of nitrite for fish. In this study there were used tests of acute toxicity tested on Poecilia reticulata and laboratory experiments carried out on Nile tilapia (Oreochromis niloticus). Influence of nitrite on blood methemoglobin content was evaluated during laboratory experiments with Nile tilapia.The 96hLC50 values of NaNO2 for Poecilia reticulata range between 39 - 436 mg.l-1 depending on chloride concentrations (10 - 190 mg.l-1) and the relationship between these values is linear. Elevation of chloride concentration to the value of 250 mg.l-1 did not cause elevation of 96hLC50 value.The experiments carried out on Nile tilapia (Oreochromis niloticus) showed: Only 3-h exposure to 36 mg.l-1 NO2- in chloride poor water (10 mg.l-1) - group 1 - cause (en)
  • Dusitany jsou pro ryby velmi toxické. Zvýšené koncentrace dusitanů se mohou vyskytovat ve vodách v intenzivních chovech ryb, zejména v recirkulačních systémech, většinou bezprostředně po zahájení provozu nebo v důsledku nerovnováh v procesu nitrifikace. Cílem této práce bylo posouzení toxického vlivu dusitanů na ryby. Sledování bylo prováděno formou testů akutní toxicity na rybách Poecilia reticulata a na tilápii nilské (Oreochromis niloticus). Při pokusech na tilápii nilské byl sledován vliv dusitanů na obsah methemoglobinu v krvi ryb. Hodnoty 96hLC50 NaNO2 pro Poecilia reticulata se pohybovaly v rozmezí 39 - 436 mg.l-1 v závislosti na koncentraci chloridů ve vodě (10 - 190 mg.l-1 Cl-), vztah mezi těmito hodnotami byl lineární. Dalším zvýšením koncentrace chloridů - na 250 mg.l-1 Cl- již nebylo dosaženo vyšší hodnoty 96hLC50.Výsledky pokusů prováděných na tilápii nilské ukázaly: že pouze 3 hodinová expozice 36 mg.l-1 NO2- ve vodě o nízké koncentraci chloridů (10 mg.l-1) - skupina č. 1 - způsobila z (cs)
Title
  • Acute toxcicity of nitrite for fish in relation to chloride concentration in water
  • Acute toxcicity of nitrite for fish in relation to chloride concentration in water (en)
  • Akutní toxicita dusitanů pro ryby v závislosti na koncentraci chloridů ve vodě (cs)
skos:prefLabel
  • Acute toxcicity of nitrite for fish in relation to chloride concentration in water
  • Acute toxcicity of nitrite for fish in relation to chloride concentration in water (en)
  • Akutní toxicita dusitanů pro ryby v závislosti na koncentraci chloridů ve vodě (cs)
skos:notation
  • RIV/60076658:12610/04:00005792!RIV/2005/MSM/126105/N
http://linked.open.../vavai/riv/strany
  • 275
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  • Z(MSM 126100003)
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http://linked.open...aciTvurceVysledku
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  • 553487
http://linked.open...ai/riv/idVysledku
  • RIV/60076658:12610/04:00005792
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http://linked.open.../riv/klicovaSlova
  • methemoglobinemie;adaptace;dusíkaté látky;úhyny;tilápie nilská;Poecilia reticulata (en)
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  • [70D012D67C06]
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  • Máchová, Jana
  • Piačková, Veronika
  • Hamáčková, Jitka
  • Kroupová, Hana
  • Valentová, Olga
http://linked.open...vavai/riv/typAkce
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number of pages
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  • Instytut Rybarstwa Srodladowego
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  • 83-87506-29-X
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  • 12610
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