Toxicity of Binary Metal Mixtures to the Tropical Ostracod Strandesia Trispinosa

Autor(es)

dos Santos Lima, Julio Cesar ; Moreira, Raquel Aparecida ; Neto, Antonio Jose Gazonato ; Freitas, Emanuela Cristina ; Daam, Michiel Adriaan ; Rocha, Odete

• Tipo de documento: Artigo Científico
• Fonte: Bulletin of Environmental Contamination and Toxicology; v. 110, n. 3, p. 11-pg., 2023-03-01.

Resumo

The ecotoxicity of metals is generally assessed individually, in part because current knowledge does not allow for the accurate prediction of the toxicity of metal mixtures to aquatic organisms. The objective of this study was to investigate the toxic effects of binary combinations of metal salts (copper sulphate-CuSO4, cadmium chloride-CdCl2, mercury chloride-HgCl2 and manganese sulphate-MnSO4) on the tropical ostracod Strandesia trispinosa through acute toxicity tests. To this end, ostracods were exposed to each individual metal salt as well as to their combinations by applying a full factorial design. The model that best explained the effects of the mixtures CuSO4 x CdCl2, CuSO4 x HgCl2 and CuSO4 x MnSO4 on the survival of S. trispinosa was Concentration Addition, whereas this was Independent Action for the CdCl2 x HgCl2 mixture. The observed synergistic interactions are likely to result in unacceptable risks to aquatic ecosystems under real field conditions. This is especially the case if CuSO4 predominates the metal mixture, as observed for its combination with mercury and manganese. (AU)

• Processo FAPESP: 17/24126-4 - Efeitos dos pesticidas fipronil e 2,4-d isoladamente e em mistura, sobre espécies nativas da biota aquática neotropical
• Beneficiário: Raquel Aparecida Moreira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado