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Showing 1 to 20 of 34 for “"Ceriodaphnia"”.
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Effects on Survival, Reproduction and Growth of Ceriodaphnia dubia following Single Episodic Exposure to Copper or Cadmium
… by the US Environmental Protection Agency, Ceriodaphnia dubia were exposed to copper or cadmium for durations ranging from 1 minute to 24 hours. In addition, adult reproductive recovery and effects on second generation individuals was assessed following select copper exposures. Finally, …
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Applicability of the biotic ligand model for mining influenced waters and influence of variations in natural organic matter characteristics on copper toxicity to Ceriodaphnia Dubia
Includes bibliographical references (pages 87-91).
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An Ecotoxicological Assessment of a Treated Coal-mining Effluent in the Leading Creek Watershed, Meigs County, Ohio
… 96-d exposure and (3) laboratory testing using Ceriodaphnia dubia. Traditional metrics such as total taxa richness, EPT, diversity and biotic indices were not sensitive to elevated TDS levels. Further study using strength of evidence, regression analysis and manipulation of laboratory formulated …
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Feeding of Naupliar and Adult Carnivorous Cyclopoids (Crustacea : Copepoda)
… "Asplanchna", and "Paramecium", but not on "Ceriodaphnia", ostracods, "Selenastrum", nor bacteria. One-day old nauplii fed on bacteria mixed with diatomaceous earth and dissolved organics, but not on "Ceriodaphnia", "Bosmina", "Asplanchna", "Paramecium", "Selenastrum", nor free bacteria. The …
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Food Habits of Young-of-the-Year Fishes in Abbey Pond, South Dakota
… elected and that Bosmina longirostris and Ceriodaphnia sp. were negatively elected. Entomostracans were the dominant food organisms for young black crappie throughout their first summer of life. Young black crappie exhibited positive electivity indices for cyclopoid copepods and negative …
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A Toxicological Analysis of Exposure Magnitude, Duration, and Frequency and the Significance for Monitoring and Management of Episodic Pollution Events
… effects to additional exposure scenarios. Ceriodaphnia dubia and fish population models were used to evaluate population level and even community level responses to intermittent disturbances. Effects at the population level showed the interaction between species life history and the timing …
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Pilot-scale study on anaerobic/aerobic treatment of a textile dye wastewater
… effluents and toxicity of the wastewaters to Ceriodaphnia dubia and Pimephales promelas were studied. In addition, the benefits of polymer treatment of anaerobic effluent, prior to aerobic treatment, were evaluated in a lab-scale system utilizing continuous flow biological reactors (CFBRs). …
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Multispecies toxicity tests using indigenous organisms: predicting the effects of hazardous materials in streams
… observed in acute tests with Daphnia magna, Ceriodaphnia dubia and Pimephales promelas and chronic survival and reproductive tests with C. dubia The predictive utility of these various tests was then evaluated against observed effects in the receiving stream. The LC₅₀<sub>s</sub> (% effluent) …
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Flatworm Predation on Juvenile Freshwater Mussels
… more often. An alternative prey, the cladoceran Ceriodaphnia reticulata, was eaten at a higher rate than mussels when only one prey type was present, but at a similar rate when both were present. Finally, the effect of flatworm size (0.7-2.2 mm long) on predation rate on mussels (0.2 mm) was …
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Predatory Impact of Exotic Cladoceran Cercopagis pengoi on the Zooplankton of Lake Ontario
… Daphnia retrocurva, Bosmina longirostris, Ceriodaphnia lacustris, Scapheloberis kingi, and Leptodora kindtii. Between 1999 and 2001 decreases in the abundance of common members of the zooplankton community coincided with an increase in the abundance of Cercopagis. Daphnia retrocurva …
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Evaluating the Feasibility of Rearing Juvenile Freshwater Mussels in a Flow-Through Pond System at White Sulphur Springs National Fish Hatchery
… lower than those seen for V. iris juveniles were Ceriodaphnia dubia and Hyella azteca.
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Feeding Ecology of Fishes in a South Dakota Power Plant Cooling Reservoir
… they negatively selected cyclopoid copepods, Ceriodaphnia spp., and Tanypodinae larvae. Chironomid larvae were positively selected by bluegills mm, but were negatively selected by those >50 mm. Fishes and chironomid larvae were the major food items of 105 black bullheads >120 mm TL; fishes and …
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The Effects of Ultraviolet-B Radiation on Aquatic Invertebrates
… values were determined for the cladocerans Ceriodaphnia reticulata, Scapholeberis kingii, and Daphnia magna, the ostracod Cyprinotus incongruens, and the amphipod Hyalella azteca. Among the species, 96-h LD₅₀ estimates were quite variable, ranging from 4.2 to 84.0 μW/cm². These estimates …
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The combined toxic effect of nanoparticles and lead in the presence of algae (Raphidocelis)
… of toxicity. An indicator aquatic organism, <em>Ceriodaphnia dubia</em> (<em>C. dubia</em>), was used to examine the combined toxicity and toxicity mitigation from algae by monitoring its 24-h mortality. Four papers are included in this research, which focus on four aspects of the combined …
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Assessment of the Efficacy of a Constructed Wetland to Reduce or Remove Wastewater Effluent Estrogenicity and Toxicity Using Biomarkers in Male Fathead Minnows (Pimephales Promelas Rafinesque, 1820)
… with P. promelas biomarkers was compared with Ceriodaphnia dubia and Vibrio fischeri toxicty tests on this effluent. Biomarkers of fish health were somewhat less sensitive than C. dubia test endpoints, but more sensitive than V. fisheri.
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The role of aquatic macrophytes in the availability of food for young fish
… dominated by Cyclops vernalis americanus and Ceriodaphnia pulchella and the open water by Bosmina longirostris and C. vernalis americanus. C. pulchella and B. longirostris seemed mutually exclusive . Evidence from a second gravel-pit lake (lower fish stock) indicated that this was partly …
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Denitrifying woodchip bioreactors for aquaculture manifold design and potential water reuse
… d). Toxicity testing with the indicator species Ceriodaphnia dubia showed no acute toxicity after five cumulative pore volumes were eluted, but chronic toxicity was observed after restarting bioreactors following a 72-h dry period. Optimal water quality concentrations for salmonid production were …
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Aquatic community response to Zequanox®: a mesocosm experiment
… (88–94% reductions in Chydorus sphaericus, Ceriodaphnia lacustris, and Scapheloberis mucronata), but abundances generally rebounded within three weeks. Declines also occurred in amphipods Hyalella azteca (mean abundance 77% less than controls) and gastropods Viviparus georgianus (survival 73 …
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Ecotoxicological Investigations in Effluent-Dominated Stream Mesocosms
… for Cd was used to predict a 48 hour Cd EC50 for Ceriodaphnia dubia of 280 µg/L in these effluent-dominated streams. This value is higher that an EC50 of 38.3 µg/L Cd and a 7-day reproduction effect level of 3.3 µg/L Cd generated for C. dubia in reconstituted laboratory hard water. These results …
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The role of zooplankton - phytoplankton community interactions in the nutrient dynamics of Lake Chapala, Mexico.
… were found in samples from Lake Chapala, with Ceriodaphnia pulchella as the most abundant. Only two species of copepods occurred, but they were more abundant than the cladocerans. The most frequently encountered species was Diaptomus albuquerquensis at an average density of 31.48 per liter. …
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