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Showing 1 to 20 of 43 for “"chironomid"”.
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Control of Chironomid Flies Breeding in Sewage Filters
… has been reviewed with special reference to the chironomid Metriocnemus hyaropetricus (Kieff.) which was the nuisance species breeding on the filters at Tamworth. References have been given for the identification of larval and adult stages of filter flies, the habits of flies in relation to …
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Modelling water and sediment chemistry in urban canals using chironomid pupal exuviae
… four principal aims. The first was to classify chironomid assemblages in canals using pupal exuviae. The second was to understand the distribution of species, their ecology and function. The third was to find indicator taxa which were suitable to classify canals in terms of water and sediment …
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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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Chironomid-based paleotemperature reconstruction of the North Slave Region, Northwest Territories during the Late Holocene
… late Holocene mean July air temperatures using a chironomid-based inference model based on lake sediment collected from two shallow lakes within the North Slave Region, Northwest Territories. No significant shifts were identified in the chironomid species assemblages, which indicated that these …
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Assessing long-term changes in chironomid assemblages linked to past fluctuations in Leach’s Storm-Petrel populations on islands in the Western Atlantic Ocean
… that are sensitive to changes in oxygen. Chironomidae (non-biting midges) can be used as paleolimnological indicators to infer changes in past oxygen conditions due to their sensitivity to oxygen concentration, excellent preservation in sediments and abundance. I assessed the long-term …
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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
… 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 Sandstone Falls, 16 …
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Nutritional Value and Management of Waterfowl and Shorebird Foods in Atlantic Coastal Moist-Soil Impoundments
… ± 226 kg / ha) plots. Discing produced higher Chironomid larva abundance during spring, and higher abundance of Amphipods and non-Chironomid Diptera during fall. Waterbird predation reduced abundance of Chironomid larvae, non-Chironomid Diptera, and Amphipods. The predation effect on Total …
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Feeding Ecology of Fishes in a South Dakota Power Plant Cooling Reservoir
… 214 bluegills < 50 mm TL fed primarily upon chironomid larvae and pupae and cladocerans. There was a significant difference (P50 mm. This was determined by Spearman rank correlation coefficients based upon percent number and percent volume of food items, and mean number of taxa per stomach. …
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Food Selectivity of the Black Bullhead (Ictalurus melas, Rafinesque) in Lake Poinsett, South Dakota
… comprised 86.5% of the total food volume. Chironomid larvae and pupae made up 5.6% of the total. Other benthic organisms and littoral cladocerans together contributed less than 1%. Stomach contents of 608 subadult and adult black bullhead (143-304 mm total length) indicated significant …
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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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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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Paleolimnological Study of Chironomidae (Diptera) Assemblage Responses to Multiple Stressors in Lake Nipigon (Northwestern Ontario)
… methods to reconstruct historical chironomid assemblages and their responses to multiple stressors in nearshore areas, as limnological data for Lake Nipigon is only sparsely available. Core surveys conducted show generalist and moderately tolerant taxa that suggest moderately warm, …
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Analysis of Hydric Pine Flatwood Ephemeral Pool Macroinvertebrate and Crustacean Assemblages Along a Temporal and Spatial Gradient From a Hypothesized Colonial Source
… between and among macroinvertebrate, chironomid, and crustacean assemblages in ephemeral pool and intermittently exposed cypress head habitats at distances within 200 meters. A Principle Components Analysis (PCA) of non-chironomid macroinvertebrate assemblages and the physical and …
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Biodiversity and Phenology of the Epibenthic Macroinvertebrate Fauna in a First Order Mississippi Stream
… group in Granny Creek was the dipteran family Chironomidae. Forty-two distinct taxa of chironomid larvae were collected over the duration of my study. Two of the dominant chironomid subfamilies in my samples, the Orthocladiinae and the Chironominae, displayed a phenological pattern in which the …
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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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Food Habits of Bigmouth and Smallmouth Buffalo in Lewis and Clark Lake and the Missouri River
… and the remaining five percent consisted of chironomid larvae, plant detritus, and sand.
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Influence of Diet and Environmental Variation on Physiological Responses of Juvenile Pallid Sturgeon (Scaphirhynchus albus)
… (1 mm, slow sinking; 45% protein, 19% fat), or chironomid larvae for 5 weeks. Pallid sturgeon fed chironomid larvae had faster average growth (0.5 g/d) than fish fed a formulated diet (0.06 g/d). Moreover, mean metabolic rate was significantly higher (82%) among fish fed a natural diet, likely …
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The impacts of century-old, arsenic-rich, mine tailings on multitrophic level biological assemblages in lakes from the Cobalt, Ontario, Canada region
… ecosystems in the region, diatom, cladoceran, chironomid, and zooplankton assemblages from lakes along a gradient of surface water arsenic contamination (0.4 - 1,113 µg/L) were sampled. Our results show that present-day arsenic concentration is not a significant driver of biotic community …
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