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- W2617317519 abstract "Cadmium (Cd) has proved to be associated with numerous toxic effects in aquatic organisms via waterborne exposure. With a view to investigate Cd toxicity along a broad spectrum of exposures reaching from environmental to toxic, we employed adult zebrafish (Danio rerio) for an in vivo study. A number of 10 fish per tank were placed in 40L tanks and were exposed for 30 days to 0.0, 5.0, 25, 50, 75, 100 and 1000μgCd per liter. There were 2 tanks for each Cd exposure (duplicate experiment). Mortality was recorded daily, dead fish were collected and tissue samples were obtained for histologic observation, whereas remaining tissues were stored for Cd burden determination. Surviving fish were collected at the end of the experiment. Median overall survival (OS) in days was found to be 9.0, 11.0, 8.0 and 7.0 for 25μg/L, 50μg/L, 75μg/L and 100μg/L respectively, with all of them showing mortality greater than 50%. Remarkably, fish exposed to the highest Cd concentration (1000μg/L) survived the longest exhibiting a mean OS of 29.2 days. Cd determination in fish tissue was conducted with an in house ICP-MS method and levels ranged from 3.1 to 29.1ng/mg. Log Cd tissue levels were significantly correlated with the log Cd exposure levels (r = 0.535, p < 0.001). The highest Cd burden was determined for fish exposed to 1000μgCd /L (mean = 12.2ng/mg). Histopathology supported these results. Our findings disclose a deviation in toxic responses through the range of Cd concentrations, leading to nonlinear responses. These differentiated responses, could be linked to hormesis phenomena." @default.
- W2617317519 created "2017-06-05" @default.
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- W2617317519 date "2017-08-01" @default.
- W2617317519 modified "2023-10-03" @default.
- W2617317519 title "Nonlinear responses to waterborne cadmium exposure in zebrafish. An in vivo study" @default.
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- W2617317519 doi "https://doi.org/10.1016/j.envres.2017.05.021" @default.
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