Data/hora: 07/06/2024 03:59:50

Provedor de dados: | 40
País: | Argentina
Título: | Acute silver toxicity to Cnesterodon decemmaculatus (Pisces: Poeciliidae) in a river with extreme water-quality characteristics
Autores: | Casares,María Victoria; de Cabo,Laura I; Seoane,Rafael; Natale,Oscar.
Data: | 2013-12-01
Ano: | 2013
Palavras-chave: | Silver; Cnesterodon decemmaculatus; Biotic Ligand Model; Extrapolation.
Resumo: | Abstract. A 96 h acute silver toxicity test was performed in order to determine silver toxicity (LC50) to a local fish species (Cnesterodon decemmaculatus) in a river with extreme water-quality characteristics (Pilcomayo River, South America) and evaluate a cross-fish-species extrapolation of the Biotic Ligand Model. The dissolved silver concentrations tested were 0.095, 0.148, 0.175 and 0.285 mg Ag L&amp;#8722;1. The 96 h Ag LC50 calculated for C. decemmaculatus was 0.14 mg L&amp;#8722;1 (0.18 - 0.10) and the value predicted by BLM for Pimephales promelas was 0.051 mg Ag L&amp;#8722;1. Test water elevated hardness may have exerted some protective effect. High mean water pH may have exerted a major protective effect by reducing silver free ion form and causing silver precipitation. The mortality pattern observed in this toxicity test may lend some support to a relationship between gill silver accumulation and mortality. A cross-fish-species extrapolation of Ag BLM for P. promelas was not valid in Pilcomayo River water and experimental conditions of this toxicity test.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432013000200004
Editor: | Asociación Toxicológica Argentina
Formato: | text/html
Fonte: | Acta toxicológica argentina  v.21 n.2 2013
Fonte: | info:eu-repo/semantics/openAccess