Th e acute toxicities of cadmium chloride (CdCl2.H2O), arsenic trioxide (AS2O3), and their mixtures to Daphnia magna were investigated by employing the statistical method of aquatic toxicity. Th e data obtained were statistically evaluated with probit analysis method (SPSS 17.0). Th e 24 h LC50 of Cd and As to Daphnia magna was estimated to be 44 μg L−1 for Cd, and 509 μg L−1 for As, respective...

Nano ZnO is currently used in the rubber, electronics, electrical appliances, enamel, cosmeticsand medical industry. Whereas most studies have used the ecological toxicity of nanoparticles, the toxic effects of nanoparticles in diet is not extensively explored. Because the algaeare at the base of the food chain, any change in their density, biomass and population, wouldaffect the food chain in ...

Cyclic parthenogens, such as the cladoceran, Daphnia magna, utilize both asexual (parthenogenetic) and sexual reproduction in order to maximize population fitness in variable environments. Parthenogenetic reproduction is the default strategy among D. magna, while various environmental cues trigger cycles of sexual reproduction. Experiments were conducted with the juvenile hormone analog methopr...

This systematic study includes physical–chemical characterisation of nanomaterials, arsenic adsorption assays, mechanism proposal, and acute toxicity assays with Daphnia magna .

currently, white fish or kutum rutilus frisii is considered to be a good candidate for commercial aquaculture. however, little information is available regarding the nutritional requirement of this fish fry. experiments were conducted to examine the effects daphnia magna as live food cultured on two freshwater green algae, chlorella sp. and scenedesmus obliquus enriched with different b group v...

We tested the hypothesis that ultrasound in controlling cyanobacteria and algal blooms is “environmental friendly” by exposing the non-target zooplankton grazer Daphnia magna to ultrasound produced by commercially available ultrasound transducers. In populations of 15 Daphnia (~2 mm body size) exposed in 800 mL of water to ultrasound supplied at 20 kHz, 28 kHz, 36 kHz or 44 kHz, all animals wer...

Imidacloprid (IMI) is at the moment the insecticide with the world's fastest growing sales and is considered possible replacement for the widely used organophosphorus pesticide, diazinon, which is subject to phased revocation in many countries. In this study, biochemical, reproductive and survival parameters of the water flea (Daphnia magna) after chronic exposure to IMI, its commercial liquid ...

According to the European REACH Directive, the acute toxicity towards Daphnia magna should be assessed for any industrial chemical with a market volume of more than 1 t/a. Therefore, it is highly recommended to determine the toxicity at a certain confidence level, either experimentally or by applying reliable prediction models. To this end, a large dataset was compiled, with the experimental ac...

Direct predation upon parasites has the potential to reduce infection in host populations. For example, the fungal parasite of amphibians, Batrachochytrium dendrobatidis (Bd), is commonly transmitted through a free-swimming zoospore stage that may be vulnerable to predation. Potential predators of Bd include freshwater zooplankton that graze on organisms in the water column. We tested the abili...