METIER (MODULAR ECOTOXICITY TESTS INCORPORATING ECOLOGICAL RELEVANCE) .2. ECOTOXICITY OF POORLY WATER-SOLUBLE COMPOUNDS - CONCENTRATION VERSUS DOSE

• Type: Article in International Scientific Journal
• Date: 1995

Authors

Felix Carvalho (Author) FFUP; Guilhermino, L. (Author) ICBAS; RIBEIRO, R (Author) Other; GONCALVES, F (Author) Other; SOARES, AMVM (Author) Other

Journal

Title: Archives of Environmental Contamination and Toxicology

Vol. 29

Pages: 431-434

ISSN: 0090-4341

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 30 Citations

Scopus - 29 Citations

Other information

Authenticus ID: P-001-G0V

DOI: 10.1007/bf00208370

Abstract (EN): A significant binding of a toxicant to algal cells would reduce effective toxicant concentration, bringing changes in NOEC (non-observed effect concentration) values. Furthermore, if the algal cells are ingested, this may increase the significance of feeding as a route of contaminant uptake. Therefore, particularly when dealing with poorly water-soluble compounds, the amount of food ingested could become a relevant ecotoxicological parameter to be assessed. The OECD guideline for the ''Daphnia, reproduction test'' indicates that the concentration of test substances must remain within 20% of the nominal concentration. The aim of this work was to look for any change in a compound concentration due to the presence of algae (the food of Daphnia magna). During the 48-h interval between medium renewal in chronic tests with D. magna, there is a loss of the effective 3,4-dichloroaniline concentration which is greater with increasing algae densities and decreasing nominal concentrations.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4