Chronic Toxicity of Acrylonitrile and Acetonitrile to Daphnia magna in 14-d and 21-d Toxicity Tests

1996 ◽  
Vol 57 (4) ◽  
pp. 655-659 ◽  
Author(s):  
Z. Tong ◽  
Z. Huailan ◽  
J. Hongjun
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Toxicity Tests

Prediction of mortality in chronic toxicity tests on Daphnia magna

1995 ◽  
Vol 29 (6) ◽  
pp. 1453-1459 ◽  
Author(s):  
Alberto Santojanni ◽  
Gessica Gorbi ◽  
Franco Sartore
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Toxicity Tests ◽  
Prediction Of Mortality

scholarly journals Acute and Chronic Toxicity of Prothioconazole and its Metabolite Prothioconazole-Desthio To Daphnia Magna

2021 ◽  
Author(s):  
An Xuehua ◽  
Liu Xinju ◽  
Jiang Jinhua ◽  
Wang Feidi ◽  
Lv Lu ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Parent Compound ◽  
Biological Indicators ◽  
Toxicity Tests ◽  
Response Relationship ◽  
Dose Response Relationship ◽  
Toxicological Effects ◽  
Acute And Chronic Toxicity ◽  
Growth And Reproduction

Abstract Prothioconazole (PTC) is a broad-spectrum triazole fungicide. Current research has mainly focused on its efficacy and residues, with few studies on its toxicological effects. This study assessed the effects of PTC, and its metabolite prothioconazole-desthio (PTCd), on the inhibition of activity, growth, and reproduction of Daphnia magna using acute and chronic toxicity tests. Additionally, the dose-response relationship was established to determine sensitive biological indicators. The acute toxicity test shows that the 48 h EC50 of PTC and PTCd to D. magna were 2.82 and 5.19 mg/L, respectively. The chronic toxicity of PTC and PTCd to D. magna were 0.00860 and 0.132 mg/L, respectively, with the parent compound being 15.3 times more toxic than its metabolite. The acute to chronic toxicity ratio (ACR) was calculated using chronic toxicity data, with ACR values of 227 and 27.5 for PTC and PTCd, respectively. These results indicate that both PTC and PTCd affect the growth and reproduction of D. magna, and the toxicity of the parent compound is greater than that of its metabolite. In conclusion, the metabolites of this pesticide have sufficient toxicity to harm D. magna at relevant environmental concentrations, and their environmental risk should not be neglected.

Prediction of fecundity in chronic toxicity tests on Daphnia magna

1998 ◽  
Vol 32 (10) ◽  
pp. 3146-3156 ◽  
Author(s):  
Alberto Santojanni ◽  
Gessica Gorbi ◽  
Franco Sartore
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Toxicity Tests

Correlations Between Daphnia magna and Fathead Minnow (Pimephales promelas) Chronic Toxicity Values for Several Classes of Test Substances

1979 ◽  
Vol 36 (4) ◽  
pp. 411-421 ◽  
Author(s):  
A. W. Maki
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Polychlorinated Biphenyl ◽  
Pearson Correlation ◽  
Pimephales Promelas ◽  
Toxicity Tests ◽  
Toxicity Data ◽  
High Fecundity ◽  
Test Species ◽  
Toxicant Concentration

Chronic toxicity values were developed for Daphnia magna with six surfactants and a detergent builder, each selected on the basis of previously existing chronic fish test data. Predictive correlations were examined for testing end points between 21-d Daphnia chronics and 1-yr fish chronics to provide a short-term alternative chronic test species while developing toxicity data for an intermediate trophic level species. For the detergent materials tested, a strong correlation (r = 0.98) exists between Daphnia and fish no-effect concentrations. A replacement term, NOEC (no observed effect concentration), is suggested to clarify interpretive ambiguities associated with the definition of the MATC (maximum acceptable toxicant concentration) value. Additional chronic toxicity data from the current literature for these two test species and several test substances representing metals, polychlorinated biphenyl isomers, and pesticide formulations were similarly compared. A correlation analysis demonstrated an overall Pearson correlation coefficient of 0.79 for these data. Although significant outliers were evident from this correlation, these differences may be due primarily to differences in modes of toxic action of these test substances. The relatively short life cycle and 21-d duration of the test, small water volumes, ease in handling, high fecundity, and good correlation of 21-d chronic data with chronic fish toxicity data make Daphnia chronic tests an attractive alternative to the conduct of longer term fish tests. Key words: Daphnia, Pimephales promelas, toxicity tests, chronic, mortality, surfactants, metals, pesticides

Daphnia magna and Ceriodaphnia dubia Have Similar Sensitivity in Standard Acute and Chronic Toxicity Tests

2021 ◽  
Author(s):  
Kristin A. Connors ◽  
Jessica L. Brill ◽  
Teresa Norberg‐King ◽  
Mace G. Barron ◽  
Greg Carr ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Ceriodaphnia Dubia ◽  
Toxicity Tests ◽  
Acute And Chronic Toxicity

Reproductive strategy of Daphnia magna: implications for chronic toxicity tests

1993 ◽  
Vol 25 (1-2) ◽  
pp. 111-123 ◽  
Author(s):  
Lisette Enserink ◽  
Michelle de la Haye ◽  
Hannie Maas
Keyword(s):  
Daphnia Magna ◽  
Reproductive Strategy ◽  
Chronic Toxicity ◽  
Toxicity Tests

scholarly journals The Physiological and Biochemical Responses of Daphnia magna to Dewatered Drinking Water Treatment Residue

2020 ◽  
Vol 17 (16) ◽  
pp. 5863 ◽  
Author(s):  
Nannan Yuan ◽  
Yuansheng Pei ◽  
Anping Bao ◽  
Changhui Wang
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Daphnia Magna ◽  
Environmental Remediation ◽  
Chronic Toxicity ◽  
Drinking Water Treatment ◽  
Toxicity Tests ◽  
Physiological And Biochemical Characteristics ◽  
Low Concentrations ◽  
Physiological And Biochemical

There have been widespread attempts to recycle drinking water treatment residue (DWTR) after dewatering for environmental remediation, which is beneficial for both the environment and the economy. The directly discharged DWTR without dewatering to natural water bodies, however, was reported to show signs of chronic toxicity to Daphnia magna (D. magna), a typical zooplankton in the aquatic environment. This study comprehensively assessed the effect of dewatered DWTR on the physiological and biochemical characteristics of D. magna based on acute and chronic toxicity tests. The results showed that the survival, growth, reproduction, body morphology of offspring, and the antioxidant enzymes of D. magna were not affected by the dewatered DWTR. These physiological and biochemical indexes also had no undesirable changes for the DWTR-amended sediments (with ratios of 0–50%) incubated for 10 and 180 d; the growth and reproduction were even promoted when D. magna was exposed to 5000 mg-sediment L−1, which may be due to the extra nutrients supplied by the amended sediments for the animals. The results demonstrated that by contrast with the directly discharged DWTR without dewatering, the dewatered DWTR could be safe to D. magna. Further analysis suggested that heavy metals (Pb, Ni, Cu, Cr, and Zn) with relatively low concentrations and high stability could be the main reasons leading to the high safety of the dewatered DWTR. Overall, dewatered DWTR can be considered a non-hazardous material for zooplankton.

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