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Showing 1 to 20 of 59 for “"Chironomidae"”.
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The ecology of the Chironomidae (Diptera) in a new eutrophic reservoir
… with particular referece to larvae of the Chironomidae. During the first four years major changes in water chemistry were the result of the different sources of water used to fill the reservoir and the release of nutrients from the inundated terrestrial vegetation. Phytoplankton populations …
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Chironomid (Diptera: Chironomidae) Larvae as Indicators of Water Quality in Irondequoit Creek, NY
Chironomid community structure and mouthpart deformities were examined as indicators of pollution or degradation of water quality in the Irondequoit Creek watershed. Differences in Simpson's diversity, taxa richness, and chironomid abundance were assessed in upper, middle, and lower creek locations …
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Past and present benthic fauna of Lake Maratoto with special reference to the chironomidae
… on their biology. A major emphasis was placed on Chironomidae which, after oligochaetes, were the most numerous benthic macroinvertebrates encountered. The fauna had a clumped distribution and was concentrated on the edge of the lake. This was due to higher food supplies and more diverse sediment …
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Macroscopic Benthos Populations and Taxonomy of the Family Chironomidae in Lake Poinsett, South Dakota
Benthos samples were collected in Lake Poinsett, a highly eutrophic eastern South Dakota lake, from March 1970 through February 1971. The lake bottom was divided into three substrate types (sand, sand-sapropel mixture and sapropel) and the percent of each substrate type was calculated. Nineteen …
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Paleolimnological Study of Chironomidae (Diptera) Assemblage Responses to Multiple Stressors in Lake Nipigon (Northwestern Ontario)
Lake Nipigon is a large, deep lake in northwestern Ontario that has experienced over a century of environmental disturbance linked to hydroelectric development, mining, and climate change. This thesis applied paleolimnological methods to reconstruct historical chironomid assemblages and their …
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Molecular Characterization of Hemoglobin Protein in Larvae of 4th Instar Chironomidae for Evaluating Environmental Quality
… (Hb) protein from hemolymph of larvae of Chironomidae, or chironomids were characterized, in order to develop a biomarker for evaluating environmental quality. Hb proteins in the hemolymph of wild chironomids were separated by SDS-PAGE and compared to head capsule morphology. Results …
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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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Chironomidae Contributions to the Macroinvertebrate Assemblage, Index of Biotic Integrity and Relationships to Water Quality Impairment for Eastern South Dakota Streams
… in natural resource condition. Contribution of Chironomidae to macroinvertebrate assemblage structure has not been explored extensively from wadeable perennial streams of the Northern Glaciated Plains (NGP). Moreover, no effort has been attempted to develop a multimetric index of biotic …
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Determinants of Growth and Survival of Larval Pallid Sturgeon: A Combined Laboratory and Field Approach
… growth and survival for zooplankton and Chironomidae and Ephemeroptera larvae in discrete pallid sturgeon size classes (first feeding larvae, 20 to 30 mm, 30 to 40 mm). We quantified pallid sturgeon prey selection offering zooplankton and Chironomidae and Ephemeroptera larvae to larval …
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Life history and production of the dominant Chironomidae in the New River, with emphasis on the effects of Bacillus thuringiensis var. Israelensis
The effects of Bacillus thuringiensis var. israelensis (Bti) on chironomid production was assessed in the New River in southern West Virginia. Production was measured in a year without Bti treatment (1987) and a year with treatment (1988). Sampling was conducted from June through November at …
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Macroinvertebrate Composition and Patterns of Prey Use By Juvenile Pallid Sturgeon (Scaphirhynchus albus) in the Missouri River, South Dakota, and Nebraska
… The most abundant families collected were Chironomidae, Ceratopogonidae, Isonychiidae, Baetidae, Caenidae, Heptageniidae, Hydropsychidae, and Polycentropodidae. Invertebrate abundance, richness, diversity, and evenness were generally higher in the Gavins Point reach than in the Fort Randall …
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Diet overlap and habitat segregation between redbreast sunfish and age-o smallmouth bass in the North Anna River, Virginia
… Diets of bass shifted from predominantly Chironomidae (Insecta: Diptera) in June to Baetidae (Insecta: Ephemeroptera) in July and August. Fish also became increasingly important diet components of bass when assessed volumetrically. Small and medium sunfish ate predominantly Chironomidae in …
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The Food Habits of Redbreast Sunfish in the San Marcos River, Texas
… were opportunistic feeders and fed heavily upon Chironomidae. During the fall-winter season, there was a decrease in the terrestrial invertebrates in the diet with a corresponding increase of aquatic invertebrates, compared to the spring-summer season. There was a significant difference between …
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Fathead Minnows, Aquatic Invertebrates, and Mallard Duckling Interactions in Man-Made Ponds
… negetatively affected by minnow presence . Fewer Chironomidae, Baetidae, Ceratopogonidae, and Coenagrionidae were caught in stocked cells, but numbers were not significantly different. Average length of Chironomidae were larger in stocked cells, while Corixidae were larger in control cells. …
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The Effects of a Paper Mill discharge on the Benthic Macro- Invertebrates of the River Llynfi
… community at these sites.<br/><br/>The Chironomidae and more particularly the Oligochaeta were very important constituents of the benthic macro-invertebrate community at the sites immediately downstream of the effluent. The most common oligochaetes were the Enchytraeidae, Tubifex tubifex …
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The Short Term Responses of Benthic Macroinvertebrates to the Removal of Riparian Rhododendron in Southern Appalachian Streams
… mostly from increases in Ephemerellidae and Chironomidae. There was also a significant decrease in filter feeding organisms in the removal reaches. Traits analysis also revealed that several traits that are shared by collector gathers also increased, e.g., short life cycles that are related …
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How do fine sediments and Hangman Creek discharge affect benthic macroinvertebrates in the Spokane River?
… common invertebrates in the Spokane River were Chironomidae, Baetis, and Hydropsyche. The three most common invertebrates in Hangman Creek were Chironomidae, Leptohyphidae and Hydropsyche. In early summer 2018, the substrates significantly affected the density of macroinvertebrates; family …
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Development and Application of a Spatially-explicit Model for Estimating Growth of Age-0 Pallid Sturgeon in the Missouri River
… as water temperature, prey type (Daphnia spp., Chironomidae and Ephemeroptera larvae) and prey density were all shown to significantly affect consumption rates of larval fish. Additionally, simulations of daily energy return of larval fish (19-50 mm) showed that a diet comprised entirely of …
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