| Registro completo |
| Provedor de dados: |
OMA
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| País: |
Belgium
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| Título: |
Predictive value of laboratory tests with aquatic invertebrates: influence of experimental conditions
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| Autores: |
Persoone, G.
Van de Vel, A.
Van Steertegem, M.
De Nayer, B.
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| Data: |
1989
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| Ano: |
1989
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| Palavras-chave: |
Artemia salina
Brachionus plicatilis
Daphnia magna
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| Resumo: |
Considering the difficulty of making meaningful extrapolations of laboratory bioassay data to real world situations, short-term tests have been carried out in a factorial pattern to determine the magnitude of effect variation resulting from changes in experimental abiotic conditions.Three selected zooplankton species (the rotifer <i>Brachionus plicatilis</i>, the brine shrimp <i><i>Artemia</i> salina</i> and the waterflea <i>Daphnia magna</i>) have been exposed to increasing concentrations of two chemicals (one inorganic and one organic) in different combinations of two major environmental variables.For the brackish water rotifer <i>B. plicatilis</i> the acute toxicity of potassium dichromate and sodium laurysulphate was determined in 16 different combinations of temperature and salinity (10-17-24-31°C and 5-20-35-50 pro mille). For the marine crustacean <i>A. salina</i>, the acute toxicity of the same two chemicals was determined in 20 temperature-salinity combinations (10-15-20-25-30°C and 5-20-35-50 pro mille) and for the freshwater crustacean <i>D. magna</i>, 16 combinations of temperature and water hardness (7-14-21-28°C and 80-320-560-800 mg/l CaCO<sub>3</sub>) were assayed.The entire study comprised nearly 300 complete toxicity tests. 24-h LC<sub>50</sub> values (for <i>Artemia</i> and <i>Brachionus</i>) and 24-h EC<sub>50</sub> values (for <i>Daphnia</i>) revealed that the variation in toxicity resulting from changing environmental conditions, is both species- and chemical-specific and (within the limits of this study) ranged from a minimum of a factor 2.5 to a maximum exceeding a factor of 100. The necessity to take variations into consideration in predictive hazard assessment studies is underlined.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3189
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| Fonte: |
%3Ci%3EAquat.+Toxicol.+14%3C%2Fi%3E%3A+149-166
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| Direitos: |
info:eu-repo/semantics/restrictedAccess
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