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Showing 1 to 10 of 10 for “"Chironomus riparius"”.
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Effects of hexavalent chromium on the growth and reproduction of Chironomus riparius (Diptera)
… of hexavalent chromium on the life cycle of Chironomus riparius were examined in the laboratory, using sublethal (0.5 mg/1) and 40% lethal (2.0 mg/1) concentrations. Chironomus egg masses were introduced into both control and chromium-treated 21 1 aquaria. Larvae were subsampled at 5-day …
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Determination of mechanism of zinc resistance in Chironomus riparius: a physiological/energetic approach
… respiration experiments using instar III and IV Chironomus riparius under the influence of 0.0, 62.5, 125, 250, and 500 ppb zinc. Main comparisons were made between larvae that were cultured in clean water conditions and larvae from cultures that had been exposed to 10 ppb zinc for over a year …
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A genetic basis for life history differences among populations of the midge, Chironomus riparius (Diptera:Chironomidae)
… were conducted with six populations of Chironomus riparius to test for variation among the populations in life history parameters such as growth. mortality and/or reproductive rates. Egg masses of C. riparius from five field populations and one laboratory population were obtained and …
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Comparative Toxicity of Eight Model Substances to the Sediment Dwelling Invertebrates Lumbriculus variegatus and Chironomus riparius
… living in the sediment. The invertebrates Chironomus riparius and Lumbriculus variegatus were selected as representatives of endobenthic living organisms. Acute toxicity tests, via water-only exposure, and sediment toxicity tests were conducted with the two endobenthic invertebrates. In …
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The use of Chironomus riparius (Diptera: Chironomidae) in benthic toxicity tests and its response to selenium
The larval and pupal stages of Chironomus riparius are benthic dwellers which ingest sediment, and are commonly prey. In an environment with elevated selenium concentrations, they can accumulate it and transfer it to higher trophic level organisms upon being ingested. This study was conducted to: …
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Abiotic and biotic factors influencing the decline of native unionid mussels in the Clinch River, Virginia
… in laboratory bioassays using Daphna magna and Chironomus riparius. These data, along with fluctuating metals in the Clinch River sediments, indicated that acute insults existed from which recovery would depend on the frequency, intensity and duration of the events. Field studies revealed that …
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Evaluating the emerging environmental risks of mycotoxins in freshwater ecosystems.
… rotifers Brachionus calyciflorus, insects Chironomus riparius (larvae), crustaceans Daphnia pulex and Thamnocephalus platyurus, cnidarians Hydra vulgaris, molluscs Lymnaea stagnalis (embryos) and Protozoa Tetrahymena thermophila. The resulting inhibition values in terms of growth, …