Comparing Metal Toxicity Among Daphnia magna Clones: An Approach Using Concentration-Time-Response Surfaces

1999 ◽  
Vol 37 (3) ◽  
pp. 326-331 ◽  
Author(s):  
Carlos Barata ◽  
Donald J. Baird ◽  
Scott J. Markich
Keyword(s):  
Daphnia Magna ◽  
Metal Toxicity ◽  
Response Surfaces ◽  
Time Response ◽  
Concentration Time

A 3D ecotoxi-topological profile: Using concentration-time-response surfaces to show peroxidase activity in Zea mays (L.) exposed to aluminium or arsenic in hydroponic conditions

Chemosphere ◽  
2021 ◽  
Vol 262 ◽  
pp. 127647
Author(s):  
Fernanda Engel ◽  
Sylvie Cotelle ◽  
Cleder A. Somensi ◽  
Renan C. Testolin ◽  
Rogério Corrêa ◽  
...  
Keyword(s):  
Zea Mays ◽  
Peroxidase Activity ◽  
Zea Mays L ◽  
Response Surfaces ◽  
Time Response ◽  
Concentration Time ◽  
Hydroponic Conditions

Liposomes as an alternative delivery system for investigating dietary metal toxicity to Daphnia magna

2011 ◽  
Vol 105 (3-4) ◽  
pp. 661-668 ◽  
Author(s):  
Roel Evens ◽  
Karel A.C. De Schamphelaere ◽  
Lieve Balcaen ◽  
Yingying Wang ◽  
Karen De Roy ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Delivery System ◽  
Metal Toxicity ◽  
Alternative Delivery

scholarly journals Behavioural responses of juvenile Daphnia magna to two organophosphorus insecticides

2021 ◽  
Author(s):  
Valeria Di Nica ◽  
Cristiana Rizzi ◽  
Antonio Finizio ◽  
Lorenzo Ferraro ◽  
Sara Villa
Keyword(s):  
Daphnia Magna ◽  
Average Velocity ◽  
Video Tracking ◽  
Time Response ◽  
Organophosphorus Insecticides ◽  
Control Groups ◽  
Compensatory Mechanisms ◽  
Active Time ◽  
Behavioural Responses ◽  
Average Acceleration

In this study, the behaviour of Daphnia magna was studied under equipotent and sub-lethal concentrations of two pesticides congeners: chlorpyrifos (CPF; 5 ng L-1 to 50 ng L-1) and chlorpyrifos-methyl (CPF-m; 30 ng L-1 to 300 ng L-1) with aims to assess and compare the behavioural swimming responses (BSRs) of the cladocerans elicited by both compounds at different concentrations and exposure times. A video tracking analysis after 24 h and 48 h of exposure allowed us to evaluate different behavioural responses (distance moved, average velocity, active time, and average acceleration). The results indicate that BSRs are sensitive indicators of sub-lethal stress. Highly concentration- and time-response changes for both compounds were observed during the experiments. In particular, in the first 24 h of exposure, both compounds elicited a similar decreasing trend in swimming behaviour, in which CPF induced the highest decline. Further, hypoactivity was associated with the narcotic effects of both compounds. Conversely, after 48 h of exposure, we observed an increasing tendency in the swimming parameters, particularly at the highest tested concentrations. However, the compounds did not exhibit the same trend. Rather, CPF-m induced high variations from the control groups. This reversal trend could be due to the activation of compensatory mechanisms, such as feeding, searching, or avoidance behaviours. These results suggest that BSRs are measurable active responses of organisms, which are controlled by time.

Performance of standard media in toxicological assessments with Daphnia magna: chelators and ionic composition versus metal toxicity

Ecotoxicology ◽  
2010 ◽  
Vol 20 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Cláudia Loureiro ◽  
Bruno B. Castro ◽  
Joana Luísa Pereira ◽  
Fernando Gonçalves
Keyword(s):  
Daphnia Magna ◽  
Metal Toxicity ◽  
Ionic Composition
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