Acute Toxicity Assays Using Danio Rerio and Daphnia Magna To Assess Hot-Spring Drainage in The Shibukuro and Tama Rivers (Akita, Japan)

2021 ◽  
Author(s):  
Kyo Suwa ◽  
Chiho Takahashi ◽  
Yoshifumi Horie
Keyword(s):  
River Water ◽  
Daphnia Magna ◽  
Danio Rerio ◽  
Hot Spring ◽  
Aquatic Organisms ◽  
Spring Water ◽  
Water Flea ◽  
Heavy Metal Concentrations ◽  
Negative Effect ◽  
Akita Prefecture

Abstract We investigated the lethal toxicity of Shibukuro and Tama river water near the inflow of Tamagawa hot-spring water in Akita Prefecture, Japan. We first measured heavy metal concentrations in both rivers. We detected iron, arsenic, and aluminum; the concentrations of each tended to decrease from upstream to downstream. We next examined the influence of river water on zebrafish Danio rerio and water flea Daphnia magna. We observed lethal effects in both species, with Daphnia magna more sensitive to toxicity than Danio rerio. For both species, the toxic effects of river water decreased with increasing distance downstream from the inflow of hot-spring water. Our results show that the heavy metals discharged from Tamagawa hot spring have a negative effect on aquatic organisms.

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.    

scholarly journals Chronic effects of domestic and single used plastic leachates on the microcrustacea Daphnia magna

2021 ◽  
Vol 5 (2) ◽  
pp. first
Author(s):  
Van-Tai Nguyen ◽  
Thi-Phuong-Dung Le ◽  
Thanh-Son Dao
Keyword(s):  
Trace Metals ◽  
Bisphenol A ◽  
Daphnia Magna ◽  
Aquatic Ecosystems ◽  
Aquatic Organisms ◽  
Environmental Issues ◽  
Plastic Pollution ◽  
Chronic Effects ◽  
Plastic Materials ◽  
Negative Effect

Plastic pollution has become one of the most serious environmental issues worldwide. Plastics can contain high amount of additives (e.g., phthalate, bisphenol A, trace metals), and they could be leached out of plastics, enter the aquatic environment and cause toxic effects to aquatic organisms (including microcrustacean). In this study, we investigated chronic effects of plastic leachates from two popular plastic materials (garbage bag and disposable raincoat) on the survival, maturation and reproduction of the microcrustcean Daphnia magna. The results showed that, the plastic leachates from the two materials at the concentration up to 1000 mg/l did not cause negative effect on survival of D. magna. However, exposed to the leachates from the garbage bag (at the concentrations of 10, 100 and 1000 mg/l) and from the disposable raincoat (at the concentration of 10 mg/l), the animals delayed their maturity ages compared to the control. Besides, the two kinds of leachates at the concentration of 1000 mg/l stimulated the reproduction of D. magna, resulting the increase of 17 – 37% of total offspring compared to the control, during 21 days of experiment. The results of this study contribute to the understanding on the toxicity of popular plastic materials to the microcrustacean, D. magna. Additionally, the plastic usage and emission into the environment should be paid more attention to protect the aquatic ecosystems and human health.

Drinking water quality and protection of resources

2010 ◽  
Vol 1 (1-2) ◽  
pp. 51-54
Author(s):  
J. Fettig
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Resources ◽  
River Water ◽  
Spring Water ◽  
Public Water Supply ◽  
Legal Requirements ◽  
Reservoir Water ◽  
Water Lake ◽  
Treatment Step

Abstract The structure of public water supply in Germany and the water resources used are briefly described. An overview over the legal requirements for drinking water is given, and the sources for contaminants are outlined. Then the multiple-barrier approach is discussed with respect to the resources groundwater and spring water, lake and reservoir water, and river water. Examples for treatment schemes are given and the principle of subsurface transport of river water as a first treatment step is described.

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