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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tilapia (Oreochromis niloticus) as a Biondicator of Copper and Cadmium Toxicity. A Bioavailability Approach

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Author(s):
Maria A. Silva [1] ; Tatiana C. S. Motta [2] ; Diogo B. Tintor [3] ; Thiago A. Dourado [4] ; Amanda L. Alcântara [5] ; Amauri A. Menegário [6] ; José R. Ferreira
Total Authors: 7
Affiliation:
[1] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura - Brasil
[2] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura - Brasil
[3] Universidade Estadual Paulista. Centro de Estudos Ambientais - Brasil
[4] Universidade Estadual Paulista. Centro de Estudos Ambientais - Brasil
[5] Universidade Estadual Paulista. Centro de Estudos Ambientais - Brasil
[6] Universidade Estadual Paulista. Centro de Estudos Ambientais - Brasil
Total Affiliations: 7
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 28, n. 1, p. 143-151, 2017-01-00.
Abstract

The acute toxicity of copper and cadmium in Oreochromis niloticus was evaluated through a 96 h static assay. Precipitation of Cu and co-precipitation of Cd in the presence of Cu were noted, being indicative of differences in nominal and actual concentrations of metals. Under these conditions, LC50-96h was determined as 3.53 mg L-1Cu, 20.1 mg L-1 Cd and 1.36 mg L-1 (Cu + Cd). Besides the quantitative determinations of total dissolved metals in water, considerations on Cd/Cu interactions in aquatic media were presented, allowing the assessment for metals speciation. Data revealed that alkalinity, hardness, dissolved organic carbon and formation of inorganic complexes reduce metal availabilities, mainly in relation to Cu. In spite of this, the LC50 for Cd was significantly reduced in the presence of Cu, matching environmental realistic values. Based on simulated fate of metals, hardness may impair a reduction of 18 and 2% in metal activities, respectively to Cu and Cd. (AU)

FAPESP's process: 10/19588-0 - Metallothioneins in tilapias (Oreochromis niloticus): formation and detoxification assessed by fish bioassay with the use of isotopic tracers 111Cd and 65Cu
Grantee:José Roberto Ferreira
Support Opportunities: Regular Research Grants
FAPESP's process: 10/14021-1 - Acute and chronic toxicity bioassays with Cd and Cu and (Cu + Cd) in tilapias (Oreochromis niloticus)
Grantee:Maria Amália da Silva
Support Opportunities: Scholarships in Brazil - Master