Copper Sulphate Toxicity of to the Golden Mussel, Limnoperna fortunei (Dunker, 1857), in Untreatment Water

Authors

  • Miriam de Freitas Soares Soares Departamento de Química Inorgânica, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
  • Daniel Pereira Laboratório de Malacologia, Museu de Ciências e Tecnologia, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
  • C. P. dos Santos Laboratório de Malacologia, Museu de Ciências e Tecnologia, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
  • M. C. D. Mansur Laboratório de Malacologia, Museu de Ciências e Tecnologia, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
  • M. Pires Laboratório de Química Analítica e Ambiental, Faculdade de Química, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
  • J. O. Breintenbach Instituto Ciências Exatas e Tecnológicas, Centro Universitário Feevale, Novo Hamburgo, RS, Brasil
  • C. Grespan Instituto Ciências Exatas e Tecnológicas, Centro Universitário Feevale, Novo Hamburgo, RS, Brasil

DOI:

https://doi.org/10.5132/jbse.2009.01.006

Keywords:

biological invader, chemical control, cooper, lethal concentrations, mortality

Abstract

Bench tests were performed in order to evaluate copper sulphate toxicity for golden mussels (Limnoperna fortunei), aiming to discover its lethal dose (CE50 and CE95 48 h) for mollusk control. Copper residue levels were also evaluated within the tested water volumes, shells and mollusk tissues through a flame atomic absorption spectrophotometry, (LD 0.0012 mg L–1 for copper). Water and golden mussel specimen samples were gathered from the Guaíba Lake, in the city of Porto Alegre, Rio Grande do Sul State, Brazil. L. fortunei was exposed to 1.24; 2.33; 3.88; 5.43; 7.76; 10.08; 13.19 and 15.50 mg L–1 copper concentrations through analogous copper sulphate solutions (CuSO4.5H2O). Test organisms (1.8-2 mm in length) were acclimatized (20 °C ± 1, 24 hours) in aquariums with air pumps and subjected to acute tests (48 hours). For each performed test, control groups (unexposed to copper sulphate) were submitted to the same conditions. The average Cu concentration, the standard error and minimum and maximum values obtained from golden mussel shells and tissues were 3.502 ± 0.056 (3.240-3.970) and 27.560 ± 2.406 (20.360-40.700) mg kg–1, respectively. The average, minimum and maximum CE50 and CE95 values in tested Cu concentrations were 2.16 (1.70 and 2.65) and 4.86 (3.97 and 6.47) mg L–1. The tested concentrations were responsible for 90.8% of the mortality. Lethal concentrations verified in this study are above those indicated for golden mussel control in water inlets supplying the city of Porto Alegre (0.5 to 2.0 mg L–1). According to statistic tests concerning behavioral and lethality indicators, the mussels reduced their filtration activities, their mobility and their reaction to contact after being exposed to copper, presenting a lethargic state.

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Published

20-06-2009

How to Cite

Soares, M. de F. S., Pereira, D., Santos, C. P. dos, Mansur, M. C. D., Pires, M., Breintenbach, J. O., & Grespan, C. (2009). Copper Sulphate Toxicity of to the Golden Mussel, Limnoperna fortunei (Dunker, 1857), in Untreatment Water. Ecotoxicology and Environmental Contamination, 4(1), 37–48. https://doi.org/10.5132/jbse.2009.01.006

Issue

Vol. 4 No. 1 (2009)

Section

Original Articles

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