Abstract：
:The hypothesis that temperature variation is able to modify the chronic toxicity of the antibiotic florfenicol (FLO) to Daphnia magna was tested in the present study. Twenty-one day laboratory bioassays were carried out at 20 and 25 °C. FLO concentrations and its potential decay during the assays were checked by spectrophotometry. At 20 °C, FLO significantly reduced the D. magna somatic growth (≥1.6 mg/L) and impaired its reproduction (EC₂₀=6.9 mg/L; EC₅₀=7.6 mg/L), with the population growth rate becoming negative at 12.6 mg/L. At 25 °C, the EC values were lower (1.7 and 1.9 mg/L, respectively) than at 20 °C, as well as the lowest exposure concentration causing a negative population growth rate (3.1 mg/L). These results clearly indicate that temperature raise from 20 to 25 °C was able to modify the FLO toxicity. Therefore, more studies on the combined effects of temperature changes and environmental contaminants are needed to improve the basis for ecological risk assessment, environmental and human safety.
journal_name
Environ Toxicol Pharmacoljournal_title
Environmental toxicology and pharmacologyauthors
Martins A,Guimarães L,Guilhermino Ldoi
10.1016/j.etap.2013.09.001subject
Has Abstractpub_date
2013-11-01 00:00:00pages
1022-32issue
3eissn
1382-6689issn
1872-7077pii
S1382-6689(13)00192-0journal_volume
36pub_type
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journal_title：Environmental toxicology and pharmacology
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journal_title：Environmental toxicology and pharmacology
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journal_title：Environmental toxicology and pharmacology
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journal_title：Environmental toxicology and pharmacology
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journal_title：Environmental toxicology and pharmacology
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journal_title：Environmental toxicology and pharmacology
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journal_title：Environmental toxicology and pharmacology
pub_type： 杂志文章
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journal_title：Environmental toxicology and pharmacology
pub_type： 杂志文章
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更新日期：2005-05-01 00:00:00
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journal_title：Environmental toxicology and pharmacology
pub_type： 杂志文章
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更新日期：2005-09-01 00:00:00
