السمية الحادة لمبيد الأعشاب Dichlorophenoxyacetic Acid-2,4 على إناث برغوث الماء Daphnia Magna وتأثير السمية المزمنة في بناء الجدول الحياتي = The Acute Toxicity of 2,4-Dichiorophenoxyacetic Acid Herbicide on a Water Flea Females Daphnia Magna and the Effect of Chronic Toxicity in Building Life Tables

2017 ◽  
Vol 12 (1) ◽  
pp. 60-65
Author(s):  
عادل حسين طالب ◽  
براء مزاحم ذاكر
Keyword(s):  
Acute Toxicity ◽  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Life Tables ◽  
Dichlorophenoxyacetic Acid ◽  
Water Flea

Prediction of acute toxicity of emerging contaminants on the water flea Daphnia magna by Ant Colony Optimization–Support Vector Machine QSTR models

2017 ◽  
Vol 19 (3) ◽  
pp. 438-448 ◽  
Author(s):  
Reza Aalizadeh ◽  
Peter C. von der Ohe ◽  
Nikolaos S. Thomaidis
Keyword(s):  
Support Vector Machine ◽  
Acute Toxicity ◽  
Ant Colony Optimization ◽  
Daphnia Magna ◽  
Emerging Contaminants ◽  
Ant Colony ◽  
Support Vector ◽  
Water Flea

Prediction of acute toxicity towardsDaphnia magnausing Ant Colony Optimization–Support Vector Machine QSTR models.

Use of life-tables and application factors for evaluating chronic toxicity of kraft mill wastes on Daphnia magna

1993 ◽  
Vol 50 (3) ◽  
Author(s):  
Fernando Mart�nez-Jer�nimo ◽  
Rafael Villase�or ◽  
F�lix Espinosa ◽  
Guillermo Rios
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Life Tables ◽  
Kraft Mill

scholarly journals ACUTE TOXICITY OF THE ETHANOL EXTRACT AND ETHYL ACETATE FRACTION OF EUPATORIUM FORTUNEI TO DAPHNIA MAGNA

2018 ◽  
Vol 56 (2C) ◽  
pp. 36-42
Author(s):  
Pham Thanh Nga
Keyword(s):  
Acute Toxicity ◽  
Ethyl Acetate ◽  
Daphnia Magna ◽  
Aquatic Ecosystems ◽  
Chronic Toxicity ◽  
Ethanol Extract ◽  
Ethyl Acetate Fraction ◽  
Zooplankton Species ◽  
Median Lethal Concentrations ◽  
Potential Risks

Previous studies have shown that the crude ethanol extract and its ethylacetate fraction of the plant Eupatorium fortunei Turcz strongly inhibited the growth of a harmful freshwater cyanobacterium Microcystis aeruginosa. However, the perspective of using these plant extracts as alternative algicides takes into account their potential risks to other species in aquatic ecosystems, including Daphnia magna. The current study presents the acute toxicity of the extracts to D. magna. The median lethal concentrations, immobilizing 50 % of D. magna, (LC50) after 24 and 48 h of the ethanol extract were 247 and 183 mg L-1, respectively. In the exposure to ethyl acetate fraction, the values of 24h-LC50 and 48h-LC50 were 47 and 13 mg L-1, respectively. The values of dissolved oxygen (DO) and pH in the control and treatments had little change during the 48-hour experiment period, fluctuating from 6.44 ÷ 7.90 and 6.07 ÷ 7.78 mg L-1, respectively, and they were still good conditions for D.magna growth. Finally, these results prove clearly that the ethyl acetate fraction is more toxic to the freshwater cladoceran than the ethanol extract. To our knowledge, it is the first report of the acute toxic estimation of E. fortunei extracts to zooplankton species, D. magna. Chronic toxicity of these extracts to D. magna needs to be studied in next step. 

scholarly journals First evidence for an aposematic function of a very common color pattern in small insects

2020 ◽  
Author(s):  
Rebeca Mora-Castro ◽  
Marcela Alfaro-Córdoba ◽  
Marcela Hernández-Jiménez ◽  
Mauricio Fernández Otárola ◽  
Michael Méndez-Rivera ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Acute Toxicity ◽  
Daphnia Magna ◽  
Reflection Spectrum ◽  
Behavioral Responses ◽  
Color Pattern ◽  
Parasitoid Wasps ◽  
Water Flea ◽  
Warning Coloration ◽  
Absorption Contrast

AbstractMany small parasitoid wasps have a black-orange-black (BOB) color pattern, which is usually present in both sexes. A likely function of this widespread pattern is aposematic (warning) coloration, but this has never been investigated. To test this hypothesis, we presented spider predators (Lyssomanes jemineus), both field-captured and lab-reared individuals, to a species with the BOB pattern and a congeneric all-black species in each of four scelionid genera (Baryconus, Chromoteleia, Macroteleia and Scelio). Each spider/wasp trial was filmed for 40 minutes under controlled conditions and three behavioral responses (detect, attack, avoid) were recorded in each of 136 trials, never using the same predator and prey more than once. In order to better understand the results obtained, two additional studies were performed. First, the reflection spectrum of the cuticle of the wasp and a theoretical visual sensibility model of the spider were used to calculate a parameter we called “absorption contrast” that allowed us to compare the perception contrast between black and orange in each wasp genus as viewed by the spider. Second, acute toxicity trials with the water flea, Daphnia magna, were performed to determine toxicity differences between BOB and non-BOB wasps. By combining the results from the three types of experiments, together with a statistical analysis, we confirmed that BOB color pattern plays an aposematic role.

scholarly journals Acute toxicity of carbofuran to selected species of aquatic and terrestrial organisms

2011 ◽  
Vol 39 (No. 3) ◽  
pp. 103-108 ◽  
Author(s):  
R. Dobšíková
Keyword(s):  
Acute Toxicity ◽  
Daphnia Magna ◽  
Poecilia Reticulata ◽  
Aquatic Organisms ◽  
Sinapis Alba ◽  
Agricultural Practice ◽  
White Mustard ◽  
Water Flea ◽  
Raphidocelis Subcapitata ◽  
The World

Carbofuran is an anticholinesterase carbamate commonly used as an insecticide, nematicide and acaricide in agricultural practice throughout the world. The aim of the study was to investigate the acute toxicity of carbofuran to selected species of aquatic organisms (the guppy Poecilia reticulata Peters, the water flea Daphnia magna Straus and the green alga Raphidocelis subcapitata Korsikov), and to a terrestrial organism (a white mustard Sinapis alba Linné). Daphnia magna Straus was found to be the most sensitive organism.    

Uptake visualization of deltamethrin by NanoSIMS and acute toxicity to the water flea Daphnia magna

Chemosphere ◽  
2009 ◽  
Vol 76 (1) ◽  
pp. 134-140 ◽  
Author(s):  
T. Eybe ◽  
T. Bohn ◽  
J.N. Audinot ◽  
T. Udelhoven ◽  
H.M. Cauchie ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Daphnia Magna ◽  
Water Flea

Read-Across Prediction of the Acute Toxicity of Organic Compounds toward the Water Flea Daphnia magna

2013 ◽  
Vol 32 (1) ◽  
pp. 108-120 ◽  
Author(s):  
Ralph Kühne ◽  
Ralf-Uwe Ebert ◽  
Peter C. von der Ohe ◽  
Nadin Ulrich ◽  
Werner Brack ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Daphnia Magna ◽  
Organic Compounds ◽  
Water Flea
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