| Registro completo |
| Provedor de dados: |
Acta Toxicol. Argent.
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| País: |
Argentina
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| Título: |
Acute silver toxicity to Cnesterodon decemmaculatus (Pisces: Poeciliidae) in a river with extreme water-quality characteristics
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| Autores: |
Casares,María Victoria
de Cabo,Laura I
Seoane,Rafael
Natale,Oscar
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| Data: |
2013-12-01
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| Ano: |
2013
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| Palavras-chave: |
Silver
Cnesterodon decemmaculatus
Biotic Ligand Model
Extrapolation
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| 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−1. The 96 h Ag LC50 calculated for C. decemmaculatus was 0.14 mg L−1 (0.18 - 0.10) and the value predicted by BLM for Pimephales promelas was 0.051 mg Ag L−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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432013000200004
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| Editor: |
Asociación Toxicológica Argentina
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| Formato: |
text/html
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| Fonte: |
Acta toxicológica argentina v.21 n.2 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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