NDLI: Suitability of Daphnia similis as an alternative organism in ecotoxicological tests: implications for metal toxicity.

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Suitability of Daphnia similis as an alternative organism in ecotoxicological tests: implications for metal toxicity.

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Suitability of Daphnia similis as an alternative organism in ecotoxicological tests: implications for metal toxicity.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Rodgher, Suzelei Espíndola, Evaldo Luiz Gaeta Lombardi, Ana Teresa
Description	Country affiliation: Brazil Author Affiliation: Rodgher S ( Centro de Recursos Hídricos e Ecologia Aplicada, Escola de Engenharia de São Carlos, Universidade de São Paulo, Avenida Trabalhador São Carlense, 400, C.P. 292, São Carlos, SP, CEP 13560-970, Brazil. surodgher@uol.com.br)
Abstract	The acute toxicity of metals to Daphnia similis was determined and compared to other daphnid species to evaluate the suitability of this organism in ecotoxicology bioassays. To verify the performance D. similis in toxicity tests, we also investigated the effect of Pseudokirchneriella subcapitata at 1 x 10(5) and 1 x 10(6) cells ml(-1) on Cd and Cr acute toxicity to the cladoceran. Daphnid neonates were exposed to a range of chromium and cadmium concentrations in the absence and presence of the algal cells. Metal speciation calculations using MINEQL(+) showed that total dissolved metal concentrations in zooplankton culture corresponded to 96.2% free Cd and 100% free Cr concentrations. Initial total dissolved metal concentrations were used for 48 h-LC(50) determination. LC(50) for D. similis was 5.15 x 10(-7) mol l(-1) dissolved Cd without algal cells, whereas with 1 x 10(5) cells ml(-1), it was significantly higher (7.15 x 10(-7) mol l(-1) dissolved Cd). For Cr, the 48 h-LC(50) value of 9.17 x 10(-7) mol l(-1) obtained for the cladoceran in tests with 1 x 10(6) cells ml(-1) of P. subcapitata was also significantly higher than that obtained in tests without algal cells (5.28 x 10(-7) mol l(-1) dissolved Cr). The presence of algal cells reduced the toxicity of metals to D. similis, as observed in other studies that investigated the effects of food on metal toxicity to standard cladocerans. Comparing our results to those of literature, we observed that D. similis is as sensitive to metals as other standardized Daphnia species and may serve as a potential test species in ecotoxicological evaluations.
File Format	HTM / HTML
ISSN	09639292
Issue Number	6
Volume Number	19
e-ISSN	15733017
Journal	Ecotoxicology
Language	English
Publisher	Springer
Publisher Date	2010-08-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Ecology Discipline Environmental Health Discipline Toxicology Cadmium Toxicity Chromium Daphnia Drug Effects Water Pollutants, Chemical Animals Analysis Chemistry Chlorophyta Physiology Metabolism Environmental Monitoring Methods Environmental Pollution Lethal Dose 50 Metals, Heavy Species Specificity Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Medicine Toxicology Management, Monitoring, Policy and Law

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Suitability of Daphnia similis as an alternative organism in ecotoxicological tests: implications for metal toxicity

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Suitability of Daphnia similis as an alternative organism in ecotoxicological tests: implications for metal toxicity.

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