Acute toxicity of methyl parathion on Daphnia laevis (Birge, 1879) and its impact on the activity of farmed fish

Authors

  • Erlei Cassiano Keppeler
  • Luís Pedro de Melo Plese Instituto Federal do Acre
  • Lisandro Juno Soares Vieira Universidade Federal do Acre

DOI:

https://doi.org/10.14210/bjast.v19n1.pNB1-5

Abstract

The presente study was carried out to determine the short-term effective concentration 50% toxicity (EC50) of methyl parathion, and to evaluate whether Daphnia laevis has the potential to be used as test organism, in medium M4, using potassium dichromate as reference substance. Twenty neonates, aged less than 24h, were separated into four groups, exposed to concentrations of 5x10-6 mg.L-1, 10x10-6 mg.L-1, 20x10-6 mg.L-1, 40x10-6 mg.L-1, 80x10-6 mg.L-1, plus a zero control, for 24h in a static test. Spearman-Karber method was is adoted for estimating of the median effective concentration (EC50). The EC50 of methyl parathion in Daphnia was 19.4 x 10-6 mg.L-1. Thus, Daphnia laevis, in medium M4, has potential to be used as test organism using as reference substance the potassium dichromate.

Author Biography

Erlei Cassiano Keppeler

Possui graduação em Biologia pela Universidade Federal do Acre (1994), Mestrado em Ecologia e Manejo de Recursos Naturais pela Universidade Federal do Acre (1999) e Doutorado em Aqüicultura pela Universidade Estadual Paulista Júlio de Mesquita Filho (2005). Atualmente é professora adjunta da Universidade Federal do Acre, onde ministra as disciplinas Biologia Celular, Introdução à Limnologia, Piscicultura, Aquicultura, dentre outras. Supervisiona bolsistas de iniciação científica e concludente de cursos.

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Published

2016-03-05

Issue

Vol. 19 No. 1 (2015)

Section

Short Notes

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