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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/5888
Tipo: Artigo de Periódico
Título: Sensitivity of the marine benthic copepod tisbe biminiensis (copepoda, harpacticoida) to potassium dichromate and sediment particle size
Título(s) alternativo(s): Brazilian Journal of Oceanography
Autor(es): Castro, Cristiane M. V. Araújo
Santos, Lília P. Souza
Torreiro, Anny Gabrielle A .G.
Garcia, Karina S.
Autor(es): Castro, Cristiane M. V. Araújo
Santos, Lília P. Souza
Torreiro, Anny Gabrielle A .G.
Garcia, Karina S.
Abstract: For the future use of the marine benthic copepod Tisbe biminiensis in solid-phase sediment toxicological bioassays, the present study investigated the effect of muddy sediment from the Maracaípe estuary (northeastern Brazil), sediment particle size and the reference toxicant potassium dichromate on the species. Muddy sediment from Maracaípe can be used as control sediment, since it does not interfere in the copepod life-cycle and has metal contamination levels that are unlikely to produce any detrimental biological effects on benthic invertebrates. Neither survival nor fecundity was affected by grain size, suggesting that this species can be used with any kind of sediment from muddy to sandy. The sensitivity of T. biminiensis to K2Cr2O7 in acute tests was similar to that of other organisms. The LC50 (lethal concentration to 50% of the test organisms) medium values for T. biminiensis were 7.51, 4.68 and 3.19 mg L-1 for Cr in 48, 72 and 96 h, respectively. These results suggest that T. biminiensis is a promising organism for use in solid-phase sediment toxicity assessments.
Palavras-chave: Toxicity
Meiofauna
Toxicity test
Potassium dichromate
Sediment grain size
URI: http://www.repositorio.ufba.br/ri/handle/ri/5888
Data do documento: 2009
Aparece nas coleções:Artigo Publicado em Periódico (IGEO)

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