Experiments to grow Tetraselmis chuii (a marine alga) and Daphnia magna in the presence of inorganic arsenate are described. The algae incorporate arsenic rather efficiently and form a lipid-soluble organic arsenic compound. T. chuii has been successfully mass cultured in a medium containing 10 ppm arsenic as arsenate. Daphnia magna was cultured in a medium containing 74As-labeled H3AsO4 and 1 ...

Genetically modified (GM) maize expressing the Bt-toxin Cry1Ab (Bt-maize) was tested for effects on survival, growth, and reproduction of the water flea Daphnia magna, a crustacean arthropod commonly used as a model organism in ecotoxicological studies. In three repeated experiments, D. magna were fed 100% ground maize in suspension, using either GM or isogenic unmodified (UM) maize. D. magna f...

This study aims to determine the growth rate of Daphnia magna with different organic fertilizers. research is an experimental using CRD (completely randomized design) 3 treatments (p) and replications (u). The fertilizer applied daphnia culture media were: P0 = Control, P1 Cow dung, P2 Swallow Manure, P3 Chicken Manure. Parameters measured included specific rate, population density daphnia. Dat...

To better understand the potential ecotoxicological impact of silver nanoparticles (AgNPs) and silver nanowires (AgNWs) released into freshwater environments, the toxicities of these nanomaterials were assessed and compared using Organization for Economic Cooperation and Development (OECD) test guidelines, including a "Daphnia sp., acute immobilization test," "Fish, acute toxicity test," and "f...

Nutritional ecology of the aquatic model genus Daphnia has received much attention in past years in particular with regard to dietary polyunsaturated fatty acids (PUFAs) which are crucial for growth and reproduction. Besides their significant role as membrane components, C20 PUFAs serve as precursors for eicosanoids, hormone-like mediators of reproduction, immunity and ion transport physiology....

Linking measures of immune function with infection, and ultimately, host and parasite fitness is a major goal in the field of ecological immunology. In this study, we tested for the presence and timing of a cellular immune response in the crustacean Daphnia magna following exposure to its sterilizing endoparasite Pasteuria ramosa. We found that D. magna possesses two cell types circulating in t...

Microplastic pollution is a problem not only in the marine environment but also freshwater ecosystems. Water flea (Daphnia magna) one of most common omnivorous cladocerans In this study, potential effects microplastics (fluorescent polystyrene beads with dimensions 6 microns) on survival, growth and reproduction Daphnia magna were examined during 21 days laboratory experiments. Microplastics (M...