Oxygen consumption by Daphnia magna Straus as a marker of chemical stress in the aquatic environment

2007 ◽  
Vol preprint (2007) ◽  
pp. 1
Author(s):  
José Carlos Martins ◽  
Martin Saker ◽  
Luis Filipe Oliva Teles ◽  
Vitor Vasconcelos
Keyword(s):  
Oxygen Consumption ◽  
Daphnia Magna ◽  
Aquatic Environment ◽  
Chemical Stress

OXYGEN CONSUMPTION BY DAPHNIA MAGNA STRAUS AS A MARKER OF CHEMICAL STRESS IN THE AQUATIC ENVIRONMENT

2007 ◽  
Vol 26 (9) ◽  
pp. 1987 ◽  
Author(s):  
José C. Martins ◽  
Martin L. Saker ◽  
Luís F. Oliva Teles ◽  
Vítor M. Vasconcelos
Keyword(s):  
Oxygen Consumption ◽  
Daphnia Magna ◽  
Aquatic Environment ◽  
Chemical Stress

scholarly journals Application of the multiuse encapsulator agent F-500 for environmental remediation

2014 ◽  
Vol 87 (1) ◽  
Author(s):  
Luigi Pane ◽  
Elisabetta Giacco ◽  
Gian Luigi Mariottini
Keyword(s):  
Risk Assessment ◽  
Daphnia Magna ◽  
Aquatic Environment ◽  
Environmental Remediation ◽  
Assessment Procedure ◽  
Target Species ◽  
Polluted Soils ◽  
Hazard Control ◽  
Ecotoxicological Evaluation ◽  
Control Technologies

In the framework of the Risk Assessment procedure for the ecotoxicological evaluation of compounds used in the aquatic environment, tests with target species must be carried out. This paper reports the results concerning the evaluation of the acute toxicity of F-500 micelle encapsulator (Hazard Control Technologies Inc., Fayetteville, GA, USA) on cladocerans Daphnia magna, with the purpose to verify its compatibility for the aquatic environment and its adequacy for the remediation of soils polluted with hydrocarbons. The obtained results show that by adding F-500 to diesel-polluted soils, the toxicity on Daphnia magna decreases remarkably, indicating the usefulness of this compound to fight the environmental pollution consequent to hydrocarbon dumping.

Temperature acclimation influences temperature-related behaviour as well as oxygen-transport physiology and biochemistry in the water flea Daphnia magna

2003 ◽  
Vol 81 (2) ◽  
pp. 237-249 ◽  
Author(s):  
Tobias Lamkemeyer ◽  
Bettina Zeis ◽  
Rüdiger J Paul
Keyword(s):  
Oxygen Consumption ◽  
Daphnia Magna ◽  
Oxygen Concentration ◽  
Oxygen Transport ◽  
Oxygen Affinity ◽  
Low Oxygen ◽  
High Concentration ◽  
Water Flea ◽  
Two Dimensional Gel Electrophoresis ◽  
Physiology And Biochemistry

To evaluate the role of temperature in oxygen transport in the water flea Daphnia magna, temperature-related behaviour as well as oxygen-transport physiology and biochemistry were investigated in animals long-term acclimated to moderate temperatures: 10, 20, or 30°C (normoxia) or 20°C (hypoxia). Study of the behaviour of animal groups within a normoxic thermal gradient showed their preferred temperatures and distribution patterns to be connected with acclimation conditions; for example, cold-acclimated individuals, with their relatively high metabolic rates and low oxygen-transport capacities, crowded at low temperatures where the oxygen concentration was high. One key to explaining these data is to assume a strategy of avoiding oxygen shortage. Both temperature and hypoxia acclimation also modified oxygen-transport variables such as oxygen consumption, ventilation and circulation rates, or the concentration and oxygen affinity of haemoglobin. Characteristic features of cold-acclimated D. magna were relatively high oxygen-consumption and heart rates and a low concentration and oxygen affinity of haemoglobin. Hypoxia-acclimated D. magna showed relatively low convective rates (frequency of thoracic-limb movements, heart rate) but a high concentration and oxygen affinity of haemoglobin. Additional experiments showed that independently of each other, temperature and ambient oxygen concentration modify haemoglobin quantity and quality, the former possibly acting via a temperature-induced hypoxia. The varying oxygen affinity is probably due to alterations of haemoglobin subunit composition, with the particular participation of subunits A, E, and G as revealed by two-dimensional gel electrophoresis.

scholarly journals Exposure medium and particle ageing moderate the toxicological effects of nanomaterials to Daphnia magna over multiple generations: a case for standard test review?

2020 ◽  
Vol 7 (4) ◽  
pp. 1136-1149 ◽  
Author(s):  
Laura-Jayne A. Ellis ◽  
Eugenia Valsami-Jones ◽  
Iseult Lynch
Keyword(s):  
Daphnia Magna ◽  
Aquatic Environment ◽  
Biological Process ◽  
Standard Test ◽  
Engineered Nanomaterials ◽  
Multiple Generations ◽  
Toxicological Effects ◽  
Test Review

Pristine engineered nanomaterials (NMs) entering the aquatic environment become ‘aged’ during their lifetime via chemical, physical and/or biological process.

scholarly journals Biotesting and phytoindication of aquatic environment quality of urbanized territories

2019 ◽  
Vol 30 (2) ◽  
pp. 101-105
Author(s):  
A. A. Alexeyeva ◽  
O. M. Marenkov ◽  
V. O. Kurchenko ◽  
I. V. Holub ◽  
O. O. Petrovsky
Keyword(s):  
Daphnia Magna ◽  
Aquatic Environment ◽  
Toxicity Assessment ◽  
Snowmelt Runoff ◽  
Environment Quality ◽  
Test Organisms ◽  
Aquatic Environment Quality ◽  
Test Objects ◽  
Wastewater Outfall

Currently, there is a necessity for regular quality control over natural water bodies within the territory of industrial cities. The aquatic environment quality monitoring and the toxicity assessment of the water pollutants, in addition to the hydrochemical analysis data, require integral, biological indicators. In recent times, methods of direct aquatic toxicity assessment, namely biotesting water quality using sensitive hydrobionts and phytoindication with macrophytes, have become increasingly important. In this regard, we have conducted a comparative quality assessment of the water from three different areas of the Saksagan river, influenced by the Ternovska mine in Kryvyi Rih using various test objects. Hydrobiological samples were collected in September 2019 above wastewater outfall (residual rainfall and snowmelt runoff), at wastewater outfall (residual rainfall and snowmelt runoff) and below rwastewater outfall (residual rainfall and snowmelt runoff). In water the basic hydrochemical indicators have been defined: hydrogen index (pH), dissolved gases, biogenic elements, hardness, temperature, electrical conductivity, total mineralization (salinity). The quality of the aquatic environment was assessed by biotesting with daphnid Daphnia magna Straus and phytoindication by modified Mayer`s index. The analysis of the hydrochemical regime has been carried out according to generally accepted methods. Biotesting of water samples was carried out according to CTDC 211.1.4.054-97. In the experiments daphnid Daphnia magna Straus were used as test organisms. For testing the samples toxicity Daphnia youth under the age of 24 hours has been used. The toxicity criterion was the mortality of test organisms in relation to control. The number of dead animals was calculated after 96 hours, then the mortality (or survival) of objects in the samples was calculated. The survey of vegetation has been carried out visually. A rake and a d-shaped net have been used to study the submerged species. The detected algae have been systematized into 3 groups according to the modified Mayer`s index. The average index for the entire monitoring area has reached 15 points, which corresponds to the third quality class (moderately polluted river, β-mesosaprobic zone). It has been revealed that the hydrochemical composition of the water of the Saksagan river is characterized by a sufficiently high mineralization (2.6–3.5 g / l), which is caused by the complex influence of several factors: physiographic conditions, river control (the influence of Makartivske, Krasovske, Saksaganske reservoirs). A naturally simplified structure of the species composition of macrophytes has been noted, which is typical for reservoirs under anthropogenic load. Endangered and listed in the Red book of Ukraine plant species in the study area were absent. The comparison of the results of bioindication methods with hydrochemical analysis has shown that phytoindication by the modified Mayer`s index was more sensitive method with respect to biotesting on daphnid Daphnia magna. However, we consider it impossible to compare these test objects, since each object may have a specific reaction to individual toxicants (Daphnia – to insecticides, macrophytes – to herbicides). Thus, in the future, it is recommended to use a set of methods for rapid assessment of the water quality in urban areas.

Phototactic behavior in Daphnia magna Straus as an indicator of toxicants in the aquatic environment

2007 ◽  
Vol 67 (3) ◽  
pp. 417-422 ◽  
Author(s):  
J. Martins ◽  
M.L. Soares ◽  
M.L. Saker ◽  
L. OlivaTeles ◽  
V.M. Vasconcelos
Keyword(s):  
Daphnia Magna ◽  
Aquatic Environment ◽  
Phototactic Behavior
Sign in / Sign up

Export Citation Format

Share Document