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

The use of oxygen consumption and ammonium excretion to evaluate the toxicity of cadmium on Farfantepenaeus paulensis with respect to salinity

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Author(s):
Barbieri, Edison [1] ; Paes, Eduardo Tavares [2]
Total Authors: 2
Affiliation:
[1] Inst Pesca APTA SAA SP, BR-11990000 Sao Paulo - Brazil
[2] Univ Fed Rural Amazonia, Inst Socioambiental & Recursos Hidricos ISARH, Belem, Para - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Chemosphere; v. 84, n. 1, p. 9-16, JUN 2011.
Web of Science Citations: 26
Abstract

The main purpose of the present study was to detect the acute toxicity of cadmium (Cd) in F. paulensis and to investigate its effect on oxygen consumption and ammonium excretion different salinities. First, we examined the acute toxicity of Cd in F. paulensis at 24, 48, 72, and 96-h lethal concentration (LC50). Cd was significantly more toxic at 5 salinity than at 20 and 36. The oxygen consumption and ammonium excretion were estimated through experiments performed on each of the twelve possible combinations of three salinities (36, 20 and 5), at temperature 20 degrees C. Cd showed a reduction in oxygen consumption at 5 salinity, the results show that the oxygen consumption decreases with respect to the Cd concentration. At the highest Cd concentration employed (2 mg L(-1)), the salinity 5 and the temperature at 20 degrees C, oxygen consumption decreases 53.7% in relation to the control. In addition, after separate exposure to Cd, elevation in ammonium excretion was obtained, wish were 72%, 65% and 95% higher than the control, respectively. The results show that Cd is more toxic to F. paulensis at lower salinities. (C) 2011 Elsevier Ltd. All rights reserved. (AU)