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Showing 1 to 20 of 42 for “"Chironomids"”.
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Asynchrony in the dynamics of chironomids across six locations in northeastern Iceland
Simultaneously studying population dynamics at multiple locations can provide insights into the ecological processes shaping changes in the abundances of species. Here, I examine 18-year time series of abundances of non-biting midges (Diptera: Chironomidae) from window trap samples at five lakes in …
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Bioaccumulation of trace metals in biota (algae and chironomids) from Kenyan saline lakes (Bogoria and Nakuru): evaluation and verification of two compartment toxicokinetic models
… test organisms (Algae Arthrospira fusiformis and chironomids Lepotochironomous deribae) exhibited organism dependent and element specific metal uptake and elimination trends. Metal uptake in algae was fast (within hours) but in chironomids it was within days. Copper unlike Cd, Pb and Zn had a more …
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Macroscopic Benthos Populations in A South Dakota Power Plant Cooling Reservoir
… Dissolved oxygen ranged from 0.2 to 15.6 ppm. Chironomids were numerically and gravimetrically the most abundant organisms taken in the cooling reservoir. Numerically they constituted 94% of all organisms sampled. They were found in greatest numbers in the intakes area of the cooling reservoir. …
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The ecology of the Chironomidae (Diptera) in a new eutrophic reservoir
… found to be contagious ly dis tributed. Chironomids in rainbow and brown trout diets were investigated during the first two fishing seasons. The species composition of larvae and pupae in the diets suggested different feeding zones for the two trout species. The behaviour of chironomid …
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Trophic Interactions And The Efficacy Of Milfoil Weevils For Biocontrol Of Eurasian Watermilfoil In Wisconsin Lakes
… diet samples from the 4 study lakes. Overall, chironomids and oligochaetes were the dominant invertebrates associated with plants, while chironomids and Daphnia spp. constituted up to 27.2% and 24.0% of the fish diets, respectively. Milfoil weevils were found in 2.9% of diet samples examined. …
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Molecular Characterization of Hemoglobin Protein in Larvae of 4th Instar Chironomidae for Evaluating Environmental Quality
… 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 showed unique profiles …
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Patterns of variation in the benthic macroinvertebrate community of the Upper Columbia River, WA
… reservoir drawdown, but in lower densities. Chironomids were the only taxon besides Hydra which were present in moderate abundance regardless of season. Along with evidence of consumption of Chironomids by sturgeon larvae in other populations, this suggests that they may be the most suitable …
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Food Habits of Yellow Perch in Eastern South Dakota Glacial Lakes
… degrees of variability among lakes and months. Chironomids were a major source of prey in all populations with mean Relative Importance (RI) values ranging from 29 to 55. The high importance of chironomids in yellow perch food habits is probably related to high densities of chironomids in the …
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An analysis of the contamination by and effects of highway- generated heavy metals on roadside stream ecosystems
… aquatic insect community that was composed of chironomids; and fish community diversity, density, and biomass. Only benthos density, the percent chironomids, and fish species diversity showed changes that could be related to metals contamination. Indications from spot sampling along the more …
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Community responses of aquatic macroinvertebrates to heavy metals in laboratory and outdoor experimental streams
… were dominated by mayflies and Tanytarsini chironomids. In contrast, treated Streams and impacted field sites were dominated by net-Spinning caddisflies (Hydropsychidae) and Orthocladiini chironomids. The similarity of these experimental results to those observed in the field suggest that …
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Relationships Among Aquatic Macroinvertebrates, Endangered Waterbirds, and Macrophytes in Taro Lo'I At Hanalei National Wildlife Refuge, Kauai, Hawaii
… and recently after planting are dominated by chironomids and oligochaetes, shifting to snails and then other insects as the taro crop matures. Invertebrate taxa richness in sweep net samples seemed to increase throughout the taro growth cycle, with the lowest taxa richness recorded in wet …
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The Life History of the Yoke Darter, Etheostoma Juliae
… Diet was composed of aquatic insect larvae with chironomids being the major food source. The success of this species can be attributed in part to its ability to inhabit the swiftest part of a riffle where competition with other darters is reduced.
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Assemblage characteristics and sampling considerations for aquatic macroinvertebrates inhabiting a lower Mississippi River stone dike
… by net-spinning caddisflies, tube-building chironomids, isopods, and clinging mayflies. The caddisfly, Hydropsyche spp., accounted for over 60 percent of the total organisms collected. A comparison of assemblage data obtained from the surface stones of the implanted substrates with data …
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Diet and Body Composition of Migrating Lesser Scaup (Aythya affinis) in Eastern South Dakota
… were found in 33% of scaup diets. Conversely, chironomids were consumed by 25% of scaup collected in the 1980s, while in the 2000s the frequency of occurrence was 35%. Mean body mass of female lesser scaup decreased from 2003 to 2004 (727 g and 701 g, respectively), but body mass of male scaup …
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DISTURBANCE ECOLOGY OF THE SONADORA RIVER ROCK POOL INSECT ASSEMBLAGE AT LUQUILLO EXPERIMENTAL FOREST, PUERTO RICO
… <em>grisea</em> species group), 2) chironomids (non-biting midges, tribe Chironomini), and 3) mosquitoes (Culicidae, <em>Culex secutor</em>). The <em>Dasyhelea</em> were rock pool specialists, while the other taxa were generalists and could be found in other aquatic habitats. …
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Observations on the Life History of the Bayou Killifish, <i>Fundulus pulvereus</i> (Everman 1899) in Mississippi Tidal Marshes
… by <em>F. pulvereus</em> were copepods, mites, chironomids, and terrestrial and aquatic insects. The bayou killifish is an opportunistic omnivore that utilizes marsh floodplains to forage for prey, and is a link in the trophic interactions taking place within estuaries. Parasitological …
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Food Habits, Growth, and Production of Young-of-the-Year Walleyes, Stizostedion vitreum vitreum (Mitchell), in a South Dakota Pond
… alternate food source. Aquatic insects, mostly chironomids, were the primary food at this time. A total of 4,416 walleyes (17.7%) was removed from the pond. Of these, 2,347 were removed with seines, 1,937 with electrofishing gear, and 111 with trap nets. Seining yielded 287.3 fish per hour of …
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The efficacy of two novel insecticides to control nuisance diptera breeding in sewage biological filters
… primarily Sylvicolafenestralis, but also the chironomids Metriocnemus hygropetricus and Limnophyesminimus. Initial laboratory studies determined that concentrations of pyriproxyfen greater than 0.2 mg l-1 inhibited insect egg development or hatching and survival to thefirst larval instar. Four …
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The Ecology of Parafluvial Ponds on a Salmon River
… fed on small invertebrates, predominantly Chironomids and Cladocera, and growth rates were as high as 1.35mm per week. Not only were fish able to grow, but population estimates were similar throughout the season indicating low mortality, and the annual bimodal occurrence of floods allowed …
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The Ecology of Parafluvial Ponds on a Salmon River
… fed on small invertebrates, predominantly Chironomids and Cladocera, and growth rates were as high as 1.35mm per week. Not only were fish able to grow, but population estimates were similar throughout the season indicating low mortality, and the annual bimodal occurrence of floods allowed …
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