Daphnia-magna
Studies on the toxicological effects of bimetals on the cladoceran, Daphnia magna and examination of histopathological effects through Transmission Electron Microscopy (TEM)
... Daphnia magna is one of the most used bio-indicator organisms for both water and sediment toxicity ...with daphnia were all perceived as positive features for an ideal test ...The daphnia is a ...
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Glyphosate Residues in Roundup Ready Soybean Impair Daphnia magna Life Cycle
... D. magna vital parameters survival, growth and fecundity were signif- icantly affected by soy type, with animals fed diets made from genetically modified soybean demonstrating sig- nificantly reduced ...D. ...
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Effects of temperature and dietary sterol availability on growth and cholesterol allocation of the aquatic keystone species Daphnia
... species Daphnia magna raised along a dietary cholesterol ...D. magna increased with the increasing availability of dietary cholesterol up to an incipient limiting level, which increased with ...
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Effects of hypoxia acclimation on morpho physiological traits over three generations of Daphnia magna
... ability to minimize environmentally induced perturbations in internal (steady-state) oxygen levels while ensuring an adequate flow of oxygen to the tissues. It provides the twofold advantage of maintaining aerobic ...
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Acute Toxicity of Carbofuran to Selected Species of Aquatic and Terrestrial Organisms
... using Daphnia magna, the luminescent bacterium Vibrio fischeri (Biotox™), and MitoScan™ assays was made by F��������- A��� et ...for Daphnia magna were ...D. magna bioassay was found ...
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The importance of the feeding current for oxygen uptake in the water flea daphnia magna
... of Daphnia magna as an internal oxygen probe, that haemoglobin was recharged fastest in the dorsal ...genus Daphnia, the haemolymph moves from anterior to posterior in the ventral part of the trunk, ...
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The development of pathogen resistance in Daphnia magna: implications for disease spread in age structured populations
... Understanding of the development of the vertebrate immune system in early life is centered on the development of the acquired immune system. It is generally accepted that, even as acquired immunity remains undeveloped or ...
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Responses of alkaline phosphatase activity to phosphorus stress in Daphnia magna
... crustacean Daphnia magna responds to variable algal food phosphorus ...that Daphnia eating P-poor food (C:P~700) had significantly higher AP activity in their bodies on a mass-specific basis compared ...
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Crater landscape: two dimensional oxygen gradients in the circulatory system of the microcrustacean Daphnia magna
... fleas Daphnia magna Straus were initially obtained from the Staatliches Umweltamt, Münster, Nordrhein-Westfalen, Germany and have been kept in laboratory culture under normal and reduced oxygen conditions ...
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Temperature dependent benefits of bacterial exposure in embryonic development of Daphnia magna resting eggs
... homogenized Daphnia body, we conducted an experiment using pure cultures of bacterial strains isolated from apparently healthy field-collected Daphnia or laboratory-grown algal ...(from Daphnia) and ...
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Physiological characterisation of a pH and calcium dependent sodium uptake mechanism in the freshwater crustacean, Daphnia magna
... in Daphnia magna is achieved by sodium–proton exchange, a mechanism that would explain the sensitivity of these organisms to acidified environments and waterborne calcium ...
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Assessment of Aquatic Toxicity of River Keya Using Daphnia magna
... the Daphnia magna within 24 hours in the collected water samples can be used to calculate the acute ...the Daphnia magna in the water samples from the sampling sites 1 and 2 of the upstream ...
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Fluorescence Intensity Assay Based on Suppression of Daphnia Magna Feeding on Dry Algae (Chlorella and Spirulina)
... in Daphnia magna feeding rates as a ...D. magna filter-feeding decreases, and fluorescence of unconsumed algal particles ...D. magna versus D. magna exposed to various concentrations of ...
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Benefits of haemoglobin in the cladoceran crustacean Daphnia magna
... It appears that our Hb-poor animals exhibited a higher tolerance for environmental oxygen deficiency which, however, can be attributed to the stringent selection of experimental animals and the specific experimental ...
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The dichotomous oxyregulatory behaviour of the planktonic crustacean Daphnia magna
... in Daphnia magna incorporates both a ventilatory–circulatory transport of oxygen to the centrally located tissues as well as a diffusive supply of peripheral tissues directly from the respiratory medium ...
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Numerical equilibrium analysis for structured consumer resource models
... In unstructured consumer resource models and in predator prey models, one typically finds a Hopf-bifurcation marking the destabilization of an interior equilibrium and the emergence of a stable limit cycle (Rosenzweig, ...
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Sodium uptake in different life stages of crustaceans: the water flea Daphnia magna Strauss
... Daphnia magna Strauss is a small hyper-regulating freshwater cladoceran showing a vigorous, active NaCl uptake (Holm-Jensen, 1948; Stobbart et al., 1977; Potts and Fryer, 1979; Bianchini and Wood, 2002; ...
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Effect of nutrient limitation of cyanobacteria on protease inhibitor production and fitness of Daphnia magna
... Deviations from the Redfield ratio in phytoplankton have been shown to lead to reduced food quality for herbivorous zooplankton (Sterner et al., 1993). This reduction in food quality may be due to the following factors: ...
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Rapid evolution of thermal tolerance in the water flea Daphnia
... and contain dormant stages of zooplankton that represent snapshots of the population through time. By hatching genotypes produced during these different time periods we can study the genetic changes that occurred in the ...
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Systems biology meets stress ecology: linking molecular and organismal stress responses in Daphnia magna
... One of the most markedly suppressed genes, JHE (juvenile hormone esterase), plays an important role in vitellogenesis (yolk formation), which comprises an important part of invertebrate oogenesis [22] (Table 1 [section ...
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