Data/hora: 09/06/2024 05:20:17

Provedor de dados: 	27	
País: 	Belgium	
Título: 	Predictive value of laboratory tests with aquatic invertebrates: influence of experimental conditions	
Autores: 	Persoone, G.; Van de Vel, A.; Van Steertegem, M.; De Nayer, B.	
Data: 	1989	
Ano: 	1989	
Palavras-chave: 	Artemia salina; Brachionus plicatilis; Daphnia magna.	
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 &lt;i&gt;Brachionus plicatilis&lt;/i&gt;, the brine shrimp &lt;i&gt;&lt;i&gt;Artemia&lt;/i&gt; salina&lt;/i&gt; and the waterflea &lt;i&gt;Daphnia magna&lt;/i&gt;) 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 &lt;i&gt;B. plicatilis&lt;/i&gt; 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 &lt;i&gt;A. salina&lt;/i&gt;, 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 &lt;i&gt;D. magna&lt;/i&gt;, 16 combinations of temperature and water hardness (7-14-21-28°C and 80-320-560-800 mg/l CaCO&lt;sub&gt;3&lt;/sub&gt;) were assayed.The entire study comprised nearly 300 complete toxicity tests. 24-h LC&lt;sub&gt;50&lt;/sub&gt; values (for &lt;i&gt;Artemia&lt;/i&gt; and &lt;i&gt;Brachionus&lt;/i&gt;) and 24-h EC&lt;sub&gt;50&lt;/sub&gt; values (for &lt;i&gt;Daphnia&lt;/i&gt;) 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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3189	
Fonte: 	%3Ci%3EAquat.+Toxicol.+14%3C%2Fi%3E%3A+149-166	
Fonte: 	info:eu-repo/semantics/restrictedAccess