Evaluation onto life cycle parameters of Ceriodaphnia silvestrii submitted to 36 days dietary copper exposure

Autor(es)

Rodgher, Suzelei ^[1] ; Lombardi, Ana Teresa ^[2] ; Gama Melao, Maria da Graca ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Hidrobiol, BR-13560 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Bot, BR-13560 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY; v. 72, n. 6, p. 1748-1753, SEP 2009.
• Citações Web of Science: 6

Resumo

The present study aimed to investigate the response of several life history parameters (body length and age of primipara, duration of embryonic development, maximum body length, reproduction and survival) of the zooplankton Ceriodaphnia silvestrii while exposed to copper contaminated algae Pseudokirchneilella subcapitata. In order to evaluate chronic exposure on the animal's life history, long-term experimental design was used. Cladocerans were fed with a dietary copper concentration ranging from 3 to 68 fgCu cell(-1). Low waterborne copper exposure (around 10(-10) mol L(-1) free Cu(2+) ions) was kept in the experiments. The results showed that by exposure of cladocerans during 7 days to contaminated food with 68 fgCu cell(-1), a significant reduction in neonate production, survival and body size were obtained. Inhibition on egg production of zooplankton at 38 fg Cu cell(-1) were observed in 36 days chronic dietary copper exposure. The importance of entire life cycle study to better evaluate cladoceran responses to chronic dietary metal exposure was demonstrated. (C) 2009 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 07/02073-4 - Toxicidade e padrões de recuperação em organismos aquáticos microheterotróficos expostos a alimento contaminado com metais
• Beneficiário: Maria da Graça Gama Melão
• Modalidade de apoio: Auxílio à Pesquisa - Regular