Chironomidae: A family of nonbiting midges, in the order DIPTERA. Salivary glands of the genus Chironomus are used in studies of cellular genetics and biochemistry.Eichhornia: A plant genus of the family PONTEDERIACEAE that is used as a biological filter for treating wastewater.Rivers: Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).Bromelia: A plant genus of the family BROMELIACEAE. Members contain karatasin and balansain (ENDOPEPTIDASES) and BROMELAINS.Eryngium: A plant genus of the family APIACEAE. Members contain SAPONINS.Larva: Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.Diptera: An order of the class Insecta. Wings, when present, number two and distinguish Diptera from other so-called flies, while the halteres, or reduced hindwings, separate Diptera from other insects with one pair of wings. The order includes the families Calliphoridae, Oestridae, Phoridae, SARCOPHAGIDAE, Scatophagidae, Sciaridae, SIMULIIDAE, Tabanidae, Therevidae, Trypetidae, CERATOPOGONIDAE; CHIRONOMIDAE; CULICIDAE; DROSOPHILIDAE; GLOSSINIDAE; MUSCIDAE; TEPHRITIDAE; and PSYCHODIDAE. The larval form of Diptera species are called maggots (see LARVA).Invertebrates: Animals that have no spinal column.Population Density: Number of individuals in a population relative to space.BrazilBiodiversity: The variety of all native living organisms and their various forms and interrelationships.Fresh Water: Water containing no significant amounts of salts, such as water from RIVERS and LAKES.Fungi: A kingdom of eukaryotic, heterotrophic organisms that live parasitically as saprobes, including MUSHROOMS; YEASTS; smuts, molds, etc. They reproduce either sexually or asexually, and have life cycles that range from simple to complex. Filamentous fungi, commonly known as molds, refer to those that grow as multicellular colonies.Ecosystem: A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)Environmental Monitoring: The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment.Population Dynamics: The pattern of any process, or the interrelationship of phenomena, which affects growth or change within a population.Myiasis: The invasion of living tissues of man and other mammals by dipterous larvae.Hypodermyiasis: Infestation with larvae of the genus Hypoderma, the warble fly.Eutrophication: The enrichment of a terrestrial or aquatic ECOSYSTEM by the addition of nutrients, especially nitrogen and phosphorus, that results in a superabundant growth of plants, ALGAE, or other primary producers. It can be a natural process or result from human activity such as agriculture runoff or sewage pollution. In aquatic ecosystems, an increase in the algae population is termed an algal bloom.Biomass: Total mass of all the organisms of a given type and/or in a given area. (From Concise Dictionary of Biology, 1990) It includes the yield of vegetative mass produced from any given crop.Bibliometrics: The use of statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use. Formerly called statistical bibliography. (from The ALA Glossary of Library and Information Science, 1983)Quinolinium CompoundsDequalinium: A topical bacteriostat that is available as various salts. It is used in wound dressings and mouth infections and may also have antifungal action, but may cause skin ulceration.Publications: Copies of a work or document distributed to the public by sale, rental, lease, or lending. (From ALA Glossary of Library and Information Science, 1983, p181)Cichlids: Common name for perch-like fish of the family Cichlidae, belonging to the suborder Labroidei, order PERCIFORMES.Ceratopogonidae: A family of biting midges, in the order DIPTERA. It includes the genus Culicoides which transmits filarial parasites pathogenic to man and other primates.Perches: A common name for fish of the family Percidae, belonging to the suborder Percoidei, order PERCIFORMES.Karyotype: The full set of CHROMOSOMES presented as a systematized array of METAPHASE chromosomes from a photomicrograph of a single CELL NUCLEUS arranged in pairs in descending order of size and according to the position of the CENTROMERE. (From Stedman, 25th ed)Karyotyping: Mapping of the KARYOTYPE of a cell.Predatory Behavior: Instinctual behavior pattern in which food is obtained by killing and consuming other species.Mites: Any arthropod of the subclass ACARI except the TICKS. They are minute animals related to the spiders, usually having transparent or semitransparent bodies. They may be parasitic on humans and domestic animals, producing various irritations of the skin (MITE INFESTATIONS). Many mite species are important to human and veterinary medicine as both parasite and vector. Mites also infest plants.Caves: Geological formations consisting of underground enclosures with access from the surface.Ecology: The branch of science concerned with the interrelationship of organisms and their ENVIRONMENT, especially as manifested by natural cycles and rhythms, community development and structure, interactions between different kinds of organisms, geographic distributions, and population alterations. (Webster's, 3d ed)Floods: Sudden onset water phenomena with different speed of occurrence. These include flash floods, seasonal river floods, and coastal floods, associated with CYCLONIC STORMS; TIDALWAVES; and storm surges.Insects: The class Insecta, in the phylum ARTHROPODA, whose members are characterized by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth; several hundred thousand different kinds having been described. Three orders, HEMIPTERA; DIPTERA; and SIPHONAPTERA; are of medical interest in that they cause disease in humans and animals. (From Borror et al., An Introduction to the Study of Insects, 4th ed, p1)Crustacea: A large subphylum of mostly marine ARTHROPODS containing over 42,000 species. They include familiar arthropods such as lobsters (NEPHROPIDAE), crabs (BRACHYURA), shrimp (PENAEIDAE), and barnacles (THORACICA).Vertebrates: Animals having a vertebral column, members of the phylum Chordata, subphylum Craniata comprising mammals, birds, reptiles, amphibians, and fishes.Brachyura: An infraorder of chiefly marine, largely carnivorous CRUSTACEA, in the order DECAPODA, including the genera Cancer, Uca, and Callinectes.Phylogeny: The relationships of groups of organisms as reflected by their genetic makeup.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Arthropods: Members of the phylum Arthropoda, composed of organisms having a hard, jointed exoskeleton and paired jointed legs. It includes the class INSECTS and the subclass ARACHNIDA, many species of which are important medically as parasites or as vectors of organisms capable of causing disease in man.China: A country spanning from central Asia to the Pacific Ocean.Siphonaptera: An order of parasitic, blood-sucking, wingless INSECTS with the common name of fleas.Phthiraptera: An order of small, wingless parasitic insects, commonly known as lice. The suborders include ANOPLURA (sucking lice); AMBLYCERA; ISCHNOCERA; and Rhynchophthirina (elephant and warthog lice).Xenopsylla: A genus of fleas in the family Pulicidae which includes the species that serves as the primary vector of BUBONIC PLAGUE, Xenopsylla cheopis.BooksLice Infestations: Parasitic attack or subsistence on the skin by members of the order Phthiraptera, especially on humans by Pediculus humanus of the family Pediculidae. The hair of the head, eyelashes, and pubis is a frequent site of infestation. (From Dorland, 28th ed; Stedman, 26th ed)Insect Proteins: Proteins found in any species of insect.Thorax: The upper part of the trunk between the NECK and the ABDOMEN. It contains the chief organs of the circulatory and respiratory systems. (From Stedman, 25th ed)Spiders: Arthropods of the class ARACHNIDA, order Araneae. Except for mites and ticks, spiders constitute the largest order of arachnids, with approximately 37,000 species having been described. The majority of spiders are harmless, although some species can be regarded as moderately harmful since their bites can lead to quite severe local symptoms. (From Barnes, Invertebrate Zoology, 5th ed, p508; Smith, Insects and Other Arthropods of Medical Importance, 1973, pp424-430)Arachnida: A class of Arthropoda that includes SPIDERS; TICKS; MITES; and SCORPIONS.

HMG1 proteins from evolutionary distant organisms distort B-DNA conformation in similar way. (1/233)

The abundant high-mobility group proteins 1/2 (HMG1/2) represent a group of potent architectural elements of chromatin. They are able to induce strong bends and untwist DNA. Here, we compared the abilities of diverse HMG1 proteins to distort the B-DNA conformation of 30-base pair DNA fragment. The DNA bending was measured in solution by monitoring fluorescence resonance energy transfer between fluorescence probes attached to opposite ends of the DNA fragment. Various insect and plant proteins which differ in size, in composition of their HMG1-box domains (HMG1-BD), and in composition of the N- and the C-terminally flanking regions were analyzed in these experiments. Despite these structural differences the extent of the induced changes in DNA conformation upon binding to various proteins was similar, as the estimated bend angle was 150+/-20 degrees for all the tested proteins. Our results suggest that a set of highly conserved residues stabilizing the tertiary structure of the HMG1-BD mainly determines the extent of DNA bending in the complex. Even extended positively charged regions flanking the HMG1-BD are apparently not able to influence this conformational distortion of DNA.  (+info)

Identification of Chironomus kiiensis allergens, a dominant species of non-biting midges in Korea. (2/233)

Non-biting midges are known to contain potent inhalant allergens. IgE antibody responses to the crude extract of Chironomus kiiensis adults, a dominant chironomid species in Korea, were examined. With the IgE-ELISA or passive cutaneous anaphylaxis reactions, increased levels of chironomid-specific IgE were detected in the skin test positive human sera, or immunized BALB/c mouse sera with the crude extract adsorbed to alum. IgE-immunoblot analysis showed major IgE-reacting protein band patterns, which reacted with more than 50% of the skin test positive human sera, at 110, 80, 73, 46, 40, 37, 34, and 31 kDa. The reactive band patterns were largely similar between skin test positive humans and immune BALB/c mice. However, the bands of 55, 31, 27, 26, 24, and 23 kDa were found only in sensitized humans, but not in immunized mice.  (+info)

Electron tomography reveals posttranscriptional binding of pre-mRNPs to specific fibers in the nucleoplasm. (3/233)

Using electron tomography, we have analyzed whether the Balbiani ring (BR) pre-mRNP particles in transit from the gene to the nuclear pore complex (NPC) are bound to any structure that could impair free diffusion through the nucleoplasm. We show that one-third of the BR particles are in contact with thin connecting fibers (CFs), which in some cases merge into large fibrogranular clusters. The CFs have a specific protein composition different from that of BR particles, as shown by immuno-EM. Moreover, we have identified hrp65 as one of the protein components of the CFs. The sequencing of hrp65 cDNA reveals similarities with hnRNP proteins and splicing factors. However, hrp65 is likely to have a different function because it does not bind to nascent pre-mRNA and is not part of the pre-mRNP itself. Taken together, our observations indicate that pre-mRNPs are not always freely diffusible in the nucleoplasm but interact with fibers of specific structure and composition, which implies that some of the posttranscriptional events that the pre-mRNPs undergo before reaching the NPC occur in a bound state.  (+info)

The Ct-RAE1 protein interacts with Balbiani ring RNP particles at the nuclear pore. (4/233)

RAE1 is an evolutionarily conserved protein that associates with both mRNPs and nucleoporins, and may bridge the interaction between mRNP export cargoes and the nuclear pore complex (NPC). However, the mechanism by which RAE1 functions in mRNA export is still unknown and the time point at which RAE1 interacts with the exported RNP has not been directly investigated. Here we have addressed this question in the Balbiani ring (BR) system of Chironomus tentans using immunoelectron microscopy. The RAE1 protein of C. tentans, Ct-RAE1, is 70% identical to human RAE1/mrnp41 (hRAE1) and is recognized by antibodies raised against hRAE1. As in vertebrate cells, Ct-RAE1 is concentrated at the nuclear envelope and also dispersed throughout the nuclear interior. Here we show that Ct-RAE1 does not bind to the BR particle either cotranscriptionally or in the nucleoplasm. Instead, the interaction between Ct-RAE1 and the exported BR particle occurs at the NPC. Moreover, the localization of Ct-RAE1 at the NPC is correlated with the presence of an exported RNP in the NPC. Finally, the anti-RAE1 antibody does not label the cytoplasmic side of BR particles in transit through the central channel, which indicates that Ct-RAE1 either remains anchored at the nuclear side of the NPC during translocation of the RNP through the central channel or becomes transiently associated with the RNP but is rapidly released into the cytoplasm.  (+info)

Actin bound to the heterogeneous nuclear ribonucleoprotein hrp36 is associated with Balbiani ring mRNA from the gene to polysomes. (5/233)

In the salivary glands of the dipteran Chironomus tentans, a specific messenger ribonucleoprotein (mRNP) particle, the Balbiani ring (BR) granule, can be visualized during its assembly on the gene and during its nucleocytoplasmic transport. We now show with immunoelectron microscopy that actin becomes associated with the BR particle concomitantly with transcription and is present in the particle in the nucleoplasm. DNase I affinity chromatography experiments with extracts from tissue culture cells indicate that both nuclear and cytoplasmic actin are bound to the heterogeneous RNP (hnRNP) protein hrp36, but not to the hnRNP proteins hrp23 and hrp45. The interaction is likely to be direct as purified actin binds to recombinant hrp36 in vitro. Furthermore, it is demonstrated by cross linking that nuclear as well as cytoplasmic actin are bound to hrp36 in vivo. It is known that hrp36 is added cotranscriptionally along the BR mRNA molecule and accompanies the RNA through the nuclear pores and into polysomes. We conclude that actin is likely to be bound to the BR transcript via hrp36 during the transfer of the mRNA from the gene all the way into polysomes.  (+info)

Consecutive steps of phosphorylation affect conformation and DNA binding of the chironomus high mobility group A protein. (6/233)

The high mobility group (HMG) proteins of the AT-hook family (HMGA) lie downstream in regulatory networks with protein kinase C, Cdc2 kinase, MAP kinase, and casein kinase 2 (CK2) as final effectors. In the cells of the midge Chironomus, almost all of the HMGA protein (cHMGA) is phosphorylated by CK2 at two adjacent sites. 40% of the protein population is additionally modified by MAP kinase. Using spectroscopic and protein footprinting techniques, we analyzed how individual and consecutive steps of phosphorylation change the conformation of an HMGA protein and affect its contacts with poly(dA-dT).poly(dA-dT) and a fragment of the interferon-beta promoter. We demonstrate that phosphorylation of cHMGA by CK2 alters its conformation and modulates its DNA binding properties such that a subsequent phosphorylation by Cdc2 kinase changes the organization of the protein-DNA complex. In contrast, consecutive phosphorylation by MAP kinase, which results in a dramatic change in cHMGA conformation, has no direct effect on the complex. Because the phosphorylation of the HMGA proteins attenuates binding affinity and reduces the extent of contacts between the DNA and protein, it is likely that this process mirrors the dynamics and diversity of regulatory processes in chromatin.  (+info)

In situ transcription and splicing in the Balbiani ring 3 gene. (7/233)

The Balbiani ring 3 (BR3) gene contains 38 introns, and more than half of them are co-transcriptionally excised. We have determined the in situ structure of the active BR3 gene by electron tomography. Each of the 20-25 nascent transcripts on the gene is present together with splicing factors and the RNA polymerase II in a nascent transcript and splicing complex, here called the NTS complex. The results indicate that extensive changes in overall shape, substructure and molecular mass take place repeatedly within an NTS complex as it moves along the gene. The volume and calculated mass of the NTS complexes show that, maximally, one complete spliceosome is assembled on the multi-intron transcript at any given time point. The structural data show that the spliceosome is not a structurally well-defined unit in situ and that the C-terminal domain of the elongating RNA polymerase II cannot carry spliceosomal components for all introns in the BR3 transcript. Our data indicate that spliceosomal factors are continuously added to and released from the NTS complexes during transcription elongation.  (+info)

Assembly and transport of a premessenger RNP particle. (8/233)

Salivary gland cells in the larvae of the dipteran Chironomus tentans offer unique possibilities to visualize the assembly and nucleocytoplasmic transport of a specific transcription product. Each nucleus harbors four giant polytene chromosomes, whose transcription sites are expanded, or puffed. On chromosome IV, there are two puffs of exceptional size, Balbiani ring (BR) 1 and BR 2. A BR gene is 35-40 kb, contains four short introns, and encodes a 1-MDa salivary polypeptide. The BR transcript is packed with proteins into a ribonucleoprotein (RNP) fibril that is folded into a compact ring-like structure. The completed RNP particle is released into the nucleoplasm and transported to the nuclear pore, where the RNP fibril is gradually unfolded and passes through the pore. On the cytoplasmic side, the exiting extended RNP fibril becomes engaged in protein synthesis and the ensuing polysome is anchored to the endoplasmic reticulum. Several of the BR particle proteins have been characterized, and their fate during the assembly and transport of the BR particle has been elucidated. The proteins studied are all added cotranscriptionally to the pre-mRNA molecule. The various proteins behave differently during RNA transport, and the flow pattern of each protein is related to the particular function of the protein. Because the cotranscriptional assembly of the pre-mRNP particle involves proteins functioning in the nucleus as well as proteins functioning in the cytoplasm, it is concluded that the fate of the mRNA molecule is determined to a considerable extent already at the gene level.  (+info)

*Mesosmittia

A new species of the genus Mesismittia Brundin, 1956 (Diptera: Chironomidae) from the Neotropics with a cladistic analysis of ... Neotropical and Mexican Mesosmittia Brundin, with description of four new species (Insecta, Diptera, Chironomidae). Spixiana 25 ... Zur Systematik der Orthocladiinae (Dipt., Chironomidae). Rep. Inst. Freshwat. Res. Drottningholm 37: 5-185. Donato, M. 2011. ...

*Match/mismatch

Butler, M. G. (1980). Emergence Phenologies of Some Arctic Alaskan Chironomidae, In Murray, D. A., editor. Chironomidae. ... Butler, M. G. (1982). A 7-year life cycle for two Chironomus species in arctic Alaskan tundra ponds (Diptera: Chironomidae). ...

*Gymnometriocnemus

n. (Diptera: Chironomidae). Aquatic Insects 5: 209-226. doi: 10.1080/01650428309361148. Stur E, Ekrem T. 2015. A review of ... Chironomidae IV. (Orthocladiinae, Corynoneurinae, Clunioninae, Diamesinae). Faune de France 23: 1-204. Sæther O.A. 1983. A ... Gymnometriocnemus is a genus of non-biting midges in the subfamily Orthocladiinae of the bloodworm family (Chironomidae). The ... A world catalogue of Chironomidae (Diptera). Part 2. Orthocladiinae. Irish Biogeographical Society & National Museum of Ireland ...

*Chironomus riparius

Chironomidae) in the Assessment of the Postsubmersion Interval". J.Forensic.Sci. 60 (3): 822-826. doi:10.1111/1556-4029.12707. ... "Chironomus riparius (Chironomidae)". http://schmidt-ottlab.uchicago.edu/. Retrieved 20 January 2015. External link in ,website ... External link in ,website= (help) "Family Chironomidae". http://lakes.chebucto.org/ZOOBENTH/BENTHOS/benthos.html. Retrieved 30 ...

*List of Diptera of Ireland

Diptera - 2. Nematocera: families Tipulidae to Chironomidae (Chironomidae). R. L. Coe, Paul Freeman & P. F. Mattingly Vol 9 ... Diptères Nématocères Chironomidae. IV. 196 p., 315 fig. Faune n° 23 Séguy, E. , 1934. Diptères (Brachycères). 832 p., 903 fig ... Vol 9 Part 2 i. Diptera - 2. Nematocera: families Tipulidae to Chironomidae (Tipulidae). R. L. Coe, Paul Freeman & P. F. ... Diptera - 2. Nematocera: families Tipulidae to Chironomidae (Trichoceridae - Culicidae). R. L. Coe, Paul Freeman & P. F. ...

*Ole A. Sæther

His contributions to Fauna Europaea, as an expert on Chironomidae, were much appreciated. He resided in Ulriksdal 1, Bergen. " ... especially Chironomidae and Chaoboridae. He penned about 265 academic publications (more than 5500pages); authored or co- ...

*Paleolimnology

Chironomidae (Diptera) in paleoecology. Quaternary Science Reviews 6: 29-40. Lindeman, R. L. 1942. The trophic-dynamic aspect ... These are two winged flies and belongs to family Chironomidae with 500 to 15,000 species. Ecologically they are considered as ... "Family Chironomidae - Midges - BugGuide.Net". bugguide.net. "Diptera - identification guide - Discover Life". www.discoverlife. ... Royal Entomology Society BugGuide Identification of Chironomidae. Museum Victoria. This website has several reports about the ...

*Aquascypha

Chironomidae) in Aquascypha hydrophora (Berk.) Reid (Fungi; Stereaceae), with description of the pupae in the Central Amazonian ...

*Chironomus

n. (Diptera: Chironomidae) from southern Poland". Zootaxa. magnolia press. 3599 (6): 564-576. doi:10.11646/zootaxa.3599.6.5. ... Chironomus is a genus of nonbiting midges in the subfamily Chironominae of the bloodworm family, Chironomidae, containing ... "On the relationship between vertical microdistribution and adaptations to oxygen stress in littoral Chironomidae (Diptera)". ...

*Midge

The larvae of some Chironomidae contain haemoglobin and are sometimes referred to as bloodworms. Non-biting midge flies are a ... "Midges: Chironomidae and related Diptera". Tracking Environmental Change Using Lake Sediments. Developments in ... phantom midges Chironomidae, non-biting midges (also known as muffleheads in the Great Lakes region of North America) ...

*Gynocladius

... is a parthenogenetic genus in the subfamily Orthocladiinae (Chironomidae). A single species is recorded from ...

*Ernst Josef Fittkau

He specialized in the Diptera, especially the family Chironomidae. Fittkau, E.J. (1995) Johann Baptist Ritter von Spix. ...

*Apometriocnemus

... is a genus of non-biting midges in the subfamily Chironominae of the bloodworm family Chironomidae. A. ... n. (Diptera: Chironomidae) from Tennessee, USA". Entomologica Scandinavica. 15: 536-539. ...

*Hazel Branch

"Notes on the Chironomidae of Kansas". Transactions of the Kansas Academy of Science (1903-). 31: 48-48. 1922. doi:10.2307/ ...

*Evolution of insects

Chironomidae, and Tipulidae. The first flies (Diptera), Hymenoptera, and true dragonflies (Odonata), Heteroptera, and ...

*Kealia Pond National Wildlife Refuge

"XV International Symposium on Chironomidae" (PDF). Control of pestiferous emergences of Chironomidae: A case study of ... Chironomidae)". [Unpublished report] submitted to Ducks Unlimited, Rancho Cordova, California. James, Van (2001). Ancient Sites ...

*Limnophyes er

Przhiboro, Andrey; Ole A. Sæther (2007). "Limnophyes (Diptera: Chironomidae) from northwestern Russia" (PDF). Aquatic Insects. ...

*Ptychoptera albimana

Diptera - 2. Nematocera: families Tipulidae to Chironomidae (Trichoceridae - Culicidae). Royal Entomological Society, London ...

*Limnophyes angelicae

Przhiboro, Andrey; Ole A. Sæther (2007). "Limnophyes (Diptera: Chironomidae) from northwestern Russia" (PDF). Aquatic Insects. ...

*Rasmus Carl Staeger

His foci were Dolichopodidae, Sepsidae and Chironomidae. Systematisk Fortegnelse over de i Danmark hidtil fundne Diptera (1840 ...

*Peder Nielsen

Diptera, 1 (exclusive of Ceratopogonidae and Chironomidae). Zoology of Iceland 3 (48A): 1-189. Full list at Craneflies of the ...

*Anatopynia

... is a genus of non-biting midges of the bloodworm family Chironomidae. At present A. plumipes (Fries, 1823) is the ... Anatopynia Int Panis, L; Pauwels A; Verheyen R (1995). "Some observations on the Chironomidae of ponds". Bull. Annls Soc. r. ...

*Ptychoptera contaminata

Diptera 2. Nematocera: families Tipulidae to Chironomidae (Trichoceridae - Culicidae). Royal Entomological Society, London pdf ...

*Alotanypus

... is a genus of non-biting midges of the bloodworm family Chironomidae. A. aris Roback, 1971 A. kuroberobusta (Sasa & ... Insecta: Diptera: Chironomidae) from the Palaearctic Region". Species Diversity. 10: 135-144. ...

*Ptychoptera minuta

Diptera 2. Nematocera: families Tipulidae to Chironomidae (Trichoceridae - Culicidae). Royal Entomological Society, London pdf ...

*Biology of Diptera

Swarm of Chironomidae Many Diptera are mimetic. An instance is Syrphidae often are brightly coloured, with spots, stripes, and ... Significant families are Chironomidae (very significant), Stratiomyidae, Ephydridae, Dixidae and Tipulidae. Food habits of most ... Swarming occurs in Chironomidae, Bibionidae Platypezidae, Limoniidae,Thaumatomyia notata, Sepsis fulgens, Bibionidae, ...
Article Ecotoxicity of bare and coated silver nanoparticles in the aquatic midge, Chironomus riparius. While sediment is generally considered to be the major sink for nanomaterials in aquatic environments, few studies have addressed the ecotoxicity o...
In vertebrates, a nuclear cap-binding complex (CBC) formed by two cap- binding proteins, CBP20 and CBP80, is involved in several steps of RNA metabolism, including pre-mRNA splicing and nuclear export of some RNA polymerase II-transcribed U snRNAs. The CBC is highly conserved, and antibodies against human CBP20 cross-react with the CBP20 counterpart in the dipteran Chironomus tentans. Using immunoelectron microscopy, the in situ association of CBP20 with a specific pre-mRNP particle, the Balbiani ring particle, has been analyzed at different stages of pre-mRNA synthesis, maturation, and nucleo-cytoplasmic transport. We demonstrate that CBP20 binds to the nascent pre-mRNA shortly after transcription initiation, stays in the RNP particles after splicing has been completed, and remains attached to the 5 domain during translocation of the RNP through the nuclear pore complex (NPC). The rapid association of CBP20 with nascent RNA transcripts in situ is consistent with the role of CBC in splicing, ...
CALLISTO, M. et al. Diversity and biomass of Chironomidae (Diptera) larvae in an impacted coastal lagoon in Rio de Janeiro, Brazil. Braz. J. Biol. [online]. 2002, vol.62, n.1, pp.77-84. ISSN 1519-6984. http://dx.doi.org/10.1590/S1519-69842002000100010.. Diversity and biomass of Chironomidae larvae were studied between January-November 1993 and March-November 1994 in an impacted lagoon in Rio de Janeiro, Southeastern Brazil, in an attempt to establish the ecological consequences of anthropogenic eutrophication processes. Nine hundred and seventy-five organisms belonging to the Tanypodinae, Orthocladiinae, and Chironominae were collected. Polypedilum (62%) and Chironomus (58%) were the most common genera found in the limnetic and littoral zones.. Keywords : biodiversity; eutrophication; chironomids; bioindicators; coastal lagoon. ...
Balbiani ring (BR) granules are premessenger ribonucleoprotein particles (RNPs) generated in giant chromosomal puffs, the BRs, in the larval salivary glands of the dipteran chironomus tentans. Monoclonal antibodies were raised against nuclear proteins collected on a single-stranded-DNA-agarose affinity column, and two of them were used to identify RNA-binding proteins in BR granules. First, in Western blots (immunoblots), one of the antibodies recognized a 36-kDa protein and the other recognized a 45-KDa protein. Second, both antibodies bound to the BRs in immunocytological experiments. It was shown in cross-linking experiments that the two proteins are associated with heterogeneous nuclear RNP (hnRNP) complexes extracted from C. tentans nuclei. By immunoelectron microscopy of isolated and partly unfolded BR RNPs, it was specifically demonstrated that the BR granules contain the two proteins and, in addition, that both proteins are distributed frequently along the RNP fiber of the particles. ...
The base composition of DNA was determined for individual chromosomes from the dipteran Chironomus tentans and for each one of six different segments of one of the chromosomes. The isolations were carried out by micromanipulation and the DNA purines were first extracted from the isolated components and afterwards separated by means of microelectrophoresis on a cellulose fiber. It was found that DNA from this material has an unusual composition corresponding to a guanine + cytosine content of about 30%. This composition was not a function of the polytenic condition but was also found for DNA from testis tissue. Furthermore Drosophila has a more traditional base composition for the bulk of DNA. Statistically significant variations in base data were found between whole chromosomes as well as between the segments from one of the chromosomes.. ...
Hemoglobin, the respiratory protein of the vertebrates, occurs among the insects only in the larvae of the Chironomides, the non-biting midges. In contrast to the hemoglobin of vertebrates,...
The chironomid community in non-wadeable lotic systems was tested as a source of information in the construction of biological metrics which could be used into the bioassessment protocols of large rivers. In order to achieve this, we simultaneously patterned the chironomid community structure and environmental factors along the catchment of the Danube and Sava River. The Self organizing map (SOM) recognized and visualized three different structural types of chironomid community for different environmental properties, described by means of 7 significant abiotic factors (a multi-stressor gradient). Indicator species analysis revealed that the chironomid taxa most responsible for structural changes significantly varied in their abundance and frequency along the established environmental gradients. Out of 40 biological metrics based on the chironomid community, the multilayer perceptron (MLP), an supervised type of artificial neural network, derived 5 models in which the abundance of ...
Fu, Yue, Saether, Ole A., Wang, Xinhua (2012): A review of Paratrichocladius Santos Abreu from the Sino-Indian Region (Diptera: Chironomidae: Orthocladiinae). Zootaxa 3478: 453-482, DOI: 10.5281/zenodo.209364
Remote lakes of northern Patagonia are ideal sites for examining climate- and non-climate-driven changes in aquatic ecosystems because there is little evidence of human influence and there is no detai
Coloured scanning electron micrograph (SEM) of Bloodworm (Chironomus tetans) head. The aquatic larval stage of a midge. Chironomus tetans is nonbiting midge in the bloodworm family Chironomidae. The Chironomidae (also known as chironomids or nonbiting midges) are a family of nematoceran flies with a global distribution. Many species superficially resemble mosquitoes. The Chirononus larvae (called bloodworms) can reach relatively high densities. The bloodworm has an iron-porphyrin protein respiratory pigment (red) in its blood and tissue fluids which corresponds to haemoglobin in vertebrates. Males are easily recognized by their plumose antennae. Larval stages of the Chironomidae can be found in almost any aquatic or semiaquatic habitat including: treeholes, bromeliads, rotting vegetation, soil, and in sewage and artificial containers. The Chironomidae are important as indicator organisms. Magnification: x22 when shortest axis printed at 25 - Stock Image C032/3927
Data about the karyotype characteristics, features of chromosomal polymorphism and larval morphology of populations of Chironomus bernensis Wülker & Klötzli, 1973 (Diptera, Chironomidae) from the Central Caucasus (the northern macroslope) and Ciscaucasia are presented. The characteristics of the pericentromeric regions of the long chromosomes of this species from Caucasian populations were very similar to the ones from some European populations (from Poland and Italy), but differed from Swiss and Siberian populations. In the North Caucasian populations 10 banding sequences were found: two in arms A, C, and E, and one in arms B, D, F, and G. Nine of them were already known for this species, and one, berC2, is described for the first time. Cytogenetic distances between all the studied populations of Ch. bernensis show that close geographical location of all studied populations from the Central Caucasus and Ciscaucasia is reflected in their similar cytogenetic structure, but on the other hand, that
Midge larvae look something like thin aquatic inchworms. They can be clear, whitish, olive, tan, or bright red. They occur in a variety of aquatic habitats. As adults, they resemble mosquitoes but they never bite.
Chironomidae larvae and mites are abundant and diversified groups that coexist in several environments. However, little importance has been attributed to their ecological relationships (predator-prey, parasitism, etc.). Therefore, the present study aimed to report the predation of mites by Tanypodinae larvae in Neotropical quartzite caves.
Chironomids (Diptera: Chironomidae; non-biting midges) are distributed worldwide, occupying a range of freshwater habitats such as streams, lakes and ponds. Mating occurs in the air during twilight (Armitage et al., 1995). After mating, the male dies, and the female descends to oviposit on the water surface. The eggs are laid in the form of egg batches (EB), each containing thousands of eggs wrapped in a gelatinous layer. Since the adults do not feed and are short lived, most females lay only once or twice and die soon after. Females usually oviposit in two stages, at the start of the evening and around sunrise. After emerging from the egg, the larva descends to the bottom of the water, where it feeds on the substrate and on suspended matter in the water. Then, 2-3 weeks later, the larva pupates and once the metamorphosis is complete, the pupa swims to the water surface, where the adult emerges into the air and is ready to mate (Pinder, 1986). Mating takes place within a couple of ...
Non-biting midges are one of the most diverse and widespread dipteran groups known. They inhabit virtually the entire range of aquatic ecosystems, both fresh and marine, as well as semi-terrestrial and terrestrial habitats. Most species have aquatic wormlike larval stages that start as egg masses laid on the water surface. After going through a pupal stage, floating at the surface of the water, a full-grown midge emerges and flies away. Larvae of some species build a protective capsule made of secretions and debris that they live in during the stage, emerging only long enough to feed.
The karyotypes of six African Chironomus species (Ch. alluaudi Kieffer, 1913, Ch. transvaalensis Kieffer, 1923, Ch. sp. Nakuru, Ch. formosipennis Kieffer, 1908, Ch. prope pulcher Wiedemann, 1830, Ch. sp. Kisumu) were investigated; four of these karyotypes were described for the first time (Ch. sp. Nakuru, Ch. formosipennis, Ch. prope pulcher, Ch. sp. Kisumu). Of the six Chironomus karyotypes, three had “pseudothummi” cytocomplex chromosome arms combinations AE CD BF G (Ch. alluaudi, Ch. transvaalensis, Ch. sp. Nakuru), two had “thummi” cytocomplex arms combinations AB CD EF G (Ch. formosipennis, Ch. prope pulcher), and one had “parathummi” arm combinations AC BF DE G (Ch. sp. Kisumu). Thus, three of the ten main cytocomplexes known were detected in Africa. Detailed photomaps of all chromosome arms, with the exception of arms B and G, were prepared for the karyotypes of Ch. alluaudi, Ch. transvaalensis, Ch. sp. Nakuru, Ch. prope pulcher; the karyotypes of Ch.
2 close-up macro pictures of a Chironomidae (Midges) True Fly Larva, collected from Cascadilla Creek in New York on March 13, 2005.
Acta Limnologica Brasiliensia, 2010, vol. 22, no. 3, p Chironomidae (Diptera) community structure in two subsystems with different states of conservation in a floodplain of southern Brazil Estrutura
Synthesis of the ribosomal subunits from pre-rRNA requires a large number of trans-acting proteins and small nucleolar ribonucleoprotein particles to execute base modifications, RNA cleavages, and structural rearrangements. We have characterized a novel protein, RNA-binding domain-1 (RBD-1), that is involved in ribosome biogenesis. This protein contains six consensus RNA-binding domains and is conserved as to sequence, domain organization, and cellular location from yeast to human. RBD-1 is essential in Caenorhabditis elegans. In the dipteran Chironomus tentans, RBD-1 (Ct-RBD-1) binds pre-rRNA in vitro and anti-Ct-RBD-1 antibodies repress pre-rRNA processing in vivo. Ct-RBD-1 is mainly located in the nucleolus in an RNA polymerase I transcription-dependent manner, but it is also present in discrete foci in the interchromatin and in the cytoplasm. In cytoplasmic extracts, 20-30% of Ct-RBD-1 is associated with ribosomes and, preferentially, with the 40S ribosomal subunit. Our data suggest that ...
In eukaryotic cells, gene expression involves multi-step processes in the nucleus and the cytoplasm. The different processes engage specific RNA-protein complexes, RNPs. Upon activation of most, if not all genes, a precursor RNA molecule is synthesized that has to be extensively processed and modified. In addition, the RNA has to associate with a distinct set of proteins. The composition of the RNP is often dynamic and changes over time. Several RNPs are exported to the cytoplasm, where they are involved in late steps of gene expression, including the synthesis of proteins.. The aim of this thesis has been to increase our knowledge about specific steps in messenger RNP (mRNP) and ribosomal RNP (rRNP) biogenesis in the eukaryotic cell.. We have characterized a novel protein, RBD-1, that is essential for ribosome biogenesis. RBD-1 contains six RNA-binding domains and is conserved in eukaryotes. In the dipteran Chironomus tentans, RBD-1 (Ct-RBD-1) is mainly located in the nucleolus, in an RNA ...
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I am interested in evolution, systematics and biogeography, in particular of non-biting midges of the family Chironomidae (Diptera). My research focuses on taxonomy, biology, phylogeny, zoogeography and molecular systematics of genera and species in the tribe Tanytarsini, but I am also involved in work with other groups of animals and plants. Among these, tardigrades through the project Tardigrades in Norwegian forests.. The last few years I have been heavily involved in various priojects testing and using DNA barcoding in biosystematics. I am currently chairing the Norwegian Barcode of Life network and project (NorBOL) which is a national research infrastructure on DNA Barcoding. NorBOL aims to develop a barcode reference database for Norwegian species to support barcoding in applied projects (such as EBAI). I am also involved in the COST action DNAqua-Net as member of the Management Committee and co-lead of the working group on reference libraries.. ...
Benthic invertebrates affect microbial processes and communities in freshwater sediment by enhancing sediment-water solute fluxes and by grazing on bacteria. Using microcosms, the effects of larvae of thewidespread midge Chironomus plumosus on the efflux of denitrification products (N2O and N2+ N2O) and the diversity and abundance of nitrate- and nitrous-oxide-reducing bacteria were investigated. Additionally, the diversity of actively nitrate- and nitrous-oxide-reducing bacteria was analyzed in the larval gut.The presence of larvae increased the total effluxes of N2O and N2+N2O up to 8.6- and 4.2-fold, respectively, which was mostly due to stimulation of sedimentary denitrification; incomplete denitrification in the guts accounted for up to 20% of the N2O efflux. Phylotype richness of the nitrate reductase gene narG was significantly higher in sediment with than without larvae. In the gut, 47 narG phylotypes were found expressed, which may contribute to higher phylotype richness in colonized ...
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Heavy metals and organophosphorus insecticide is known to act as disruptors for the enzyme system, leading to physiologic disorders. The present study was conducted to investigate the potential use of these enzymes as biomarkers in assessment of contaminated sediments on tropical chironomid species. Acetylcholinesterase (AChE), glutathione-S-transferase (GST) and metallothionein (MT) activity was measured in the fourth-instar chironomid larvae, Chironomus javanus, Kieffer, after either 48-hr or 96-hr exposure to organophosphorus insecticide, chlorpyrifos (0.01- 0.25 mg kg-1) or heavy metal cadmium (0.1-25 mg kg-1). Exposure to chlorpyrifos (0.01 mg kg-1) at 48 and 96 hr significantly of AChE activity (64.2 % -85.9%) and induced GST activity (33.9 - 63.8 %) when compared with control (P,0.05). Moreover, exposure to cadmium (0.1mg kg-1) at 48 and 96 hr also showed significant increas GST activity (11.7 - 40 %) and MT level (9.0 % - 70.5 %) when compared with control (P,0.05). The results indicated ...
Terrestrial larvae of B. antarctica tolerated extensive osmotic dehydration when challenged by hyperosmotic seawater. Nearly 50% of the larvae survived a 10-day exposure in ∼1000 mOsm kg-1 seawater, during which the total body water content of the larvae was reduced by∼ 30% to ,1.80 g H2Og-1 DM. Survival declined rapidly during exposure to higher seawater concentrations; however, even in ∼2000 mOsm kg-1 seawater ∼25% of larvae survived a 6-day exposure. As the larvae are known to tolerate an extensive loss of body water, survival during exposure to hyperosmotic seawater is probably not solely dependent on tolerance to dehydration. During desiccation in air, larvae survive the loss of nearly 70% of their body water to ,1.0 g H2Og-1 DM (Benoit et al., 2007). Instead, during seawater exposure, an incurred salt load from the external medium probably contributed to the observed mortality. Inorganic ions, and especially Na+ and Cl-, are well known to disrupt cellular activity by binding to and ...
Riley A.C., Ashlock D.A. & Graether S.P. (2019). Evolution of the modular, disordered stress proteins known as dehydrins. PLoS One. 14(2):e0211813.. Moore, C. & Meng, B. (2019). Prediction of the molecular boundary and functionality of novel viral AlkB domains using homology modelling and principal component analysis. Journal of General Virology. 10.1099/jgv.0.001237. Rajna, A., Gibling, H., Sarr, O., Matravadia, S., Holloway, G.P. & Mutch, D.M. (2018). Alpha-linolenic acid and linoleic acid differentially regulate the skeletal muscle secretome of obese Zucker rats. Physiological genomics, 50 8, 580-589.. Ekrem, T. & Stur, E. Orton, M. & Adamowicz, S. (2018). DNA barcode data reveal biogeographic trends in Arctic non-biting midges. Genome. 61. 10.1139/gen-2018-0100. Orton, M.G., May, J.A., Ly, W., Lee, D.J. & Adamowicz, S.J. (2018). Is molecular evolution faster in the tropics? Heredity, 1-12.. Malik A.A., Veltri M., Boddington K.F., Singh K.K. & Graether S.P. (2017). Genome Analysis of ...
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Chironomidae larvae from the lower Athabasca River, AB, Canada and its tributaries including macroscopic subfamily and tribe keys, indices for environmental tolerance and trait-based information for ...
Life and death are mutually exclusive states But some organisms showing no sign of living due to complete desiccation are nevertheless able to resume active life after rehydration This peculiar biological state is referred to as anhydrobiosis Larvae of the sleeping chironomid P vanderplanki living in temporary pools in semi-arid areas on the African continent become completely desiccated upon drought but can revive after water becomes available upon the next rain The anhydrobiotic larvae can stand other extreme conditions such as exposure to 100 r C -270 r C 100 ethanol 7kGy gamma-rays and vacuum As space environment is a typical extreme condition we propose that the sleeping chironomid could be a potential experimental animal for space-related study and indeed such experiments are rightly underway at ISS ...
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I am 58, and I exercise i hour to 2 , 4 to 5 times weekly. I like to take two days off a week. I do elliptical, bike, weights, stretching and whatever else I might feel like incorporating into the routine. I am not sure all 58 year old could do all this, in fact I doubt it. I ran 6 miles a day and 12 on Sat for many years well over 10 I have worked out my entire life. I think most people who have not done any exercise would want to take it easy with say pilates or treadmill, or elliptical , starting slowly. Check with your doctor ...
... When it comes to stillwaters, few bugs matter as much in a trouts diet as the midge. A true staple for trout, the midge will
102. ISTOMINA,A.G., SIIRIN, M.T., MAKAREVICH,Z.F., SCHERBIK,S.V., WUELKER,W., POLUKONOVA,N.V. 2000. The fixation of polytene chromosome soecies specific band sequences is the main differentiating factor in the obtusidens-group of the genus Chironomus (Diptera,Chironomidae). In: Biodiversity and dynamics of ecosystems in North Eurasia, Vol.1, part 3: Molecular-genetic basis of biodiversity (animals and plants) pp.57-59. Inst.Tsitol,Genet.Sib.Ot.of Ross.,Acad.Nauk.Novosibirsk ...
Flies (order Diptera) can be divided into two large groups, the Brachycera and the Nematocera. The latter group includes mosquitoes (family Culicidae) and many other flies that resemble mosquitoes. Among these mosquito-like flies are the common midges (family Chironomidae). There are a few obvious (and many more not-so-obvious) differences between adult midges and mosquitoes. First,…
After the past few weeks of cold weather, its natural to day dream a little about the warm, pleasant days of late spring and summer. At least thats how we think of them when its cold enough to freeze a catfish. We want to remember cool lemonades in the shade, evening baseball games and fireworks. We tend to forget the 100 degree days, weeds and lawns that wont stop growing, chiggers, mosquitoes and midges. Well, if youre lucky enough to live next to a lake or pond, you might remember the midges.. Midges are one of those tiny aquatic flies that emerge sporadically in large numbers from streams, ponds and lakes. They look a little like miniature mosquitoes, though they dont bite. They do, however, fly in your mouth, hover around the porch lights and (if you were my caller today) turn your patio and porch black with millions of tiny midge bodies. Most midges associated with lakes and ponds belong to the fly family Chironomidae (KY row NOME id dee). This particular call came from a person who ...
An analysis of the remains of ancient midges - tiny non-biting insects closely related to mosquitoes - opens a new window on the past with a detailed view of the surprising regional variability that accompanied climate warming during the early Holocene epoch, 10,000 to 5,500 years ago.. Researchers at the University of Illinois and the University of British Columbia looked at the abundance and variety of midge larvae buried in lake sediments in Alaska. Midges are highly sensitive to summer temperatures, so changes in the abundance of different species over time gave the scientists a reliable marker of temperature fluctuations over the last 10,000 years.. Northern high latitudes are thought to have been warmer than today during the early Holocene, a time of heightened solar irradiation as a result of Earths axial tilt and orbit around the sun. The period is often referred to as the Holocene Thermal Maximum. Scientists hope to understand the ecological impacts of climate warming during that time ...
Domain: Eukaryota • Regnum: Animalia • Phylum: Arthropoda • Subphylum: Hexapoda • Classis: Insecta • Subclassis: Pterygota • Infraclassis: Neoptera • Superordo: Endopterygota • Ordo: Diptera • Subordo: Nematocera • Infraordo: Culicomorpha • Superfamilia: Chironomoidea • Familia: Chironomidae • Subfamilia: Tanypodinae • Tribus: Anatopyniini • Genus: Anatopynia Johannsen, 1905 ...
20 download Macs All in One: author on Screen. Entomologia y Vectores, 12(2): 265-274. 10182588 Meigen( Diptera, Chironomidae) in the environment of Sao Paulo, Brazil.
Specificity of attachement sites of larval water mites (Hydrachnida, Acari) on their insect hosts (Chironomidae, Diptera) evidence from some stream-living species ...
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I have been reading all of the posts about how much fish like Blood Worms so I thought that I would get some and try it. OMG I didnt know 4 little fish...
the bathroom of a Pizza Hut with Kim Kardashian. Thats not even the craziest part of the story. The Daily Caller reports that the man is looking for a restraining order against the former pizza man alleging that when Cain was recognized doing the deed with Kim K, he "pelted him with breadsticks, and the reality star hit him in the face with a pan pizza "straight out of the [o]ven." The Daily Caller shoots the story down with their headline, "Herman Cain probably did not make a sex tape with Kim Kardashian in a Pizza Hut restroom." Well, damn. I had a whole stockpile of possible movie titles if they were making a skin flick. "Meat Lovers", "Make My Breadstick Rise" and "Did You Put Anchovies on This?" ...
By Jay Whetter, Canola Council fo Canada Canola damage thought to be from swede midge is likely caused by two separate midge species. Swede midge has been found in the past, and sparked our current research. The other species, a close relative to swede midge that produces similar larvae and symptoms, is new to science. Scientists were suspicious that two midge species were present in canola in Western Canada when pheromone traps specific to swede midge were not catching any even though midge were present . . .
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Thank you for this follow-up. Will share w/ Neale. BobF, Hello, BW Goby ID 2/25/09 I had a customer come into my shop looking for what he called a Kabong Goby. He said it was a brackish fish looked nothing like a goby. It has a long snout like a gar, lots of teeth, spends most of the time upside-down, and acts like an ambush predator. I was wondering if youve heard of this fish or if you know of it under a different name. Any help would be greatly appreciated. Thanks Carl ,Hello Carl. There are a few things this might be, and without a photo its difficult to say for certain. But the two fish most commonly traded that match this description are Butis butis and Oxyeleotris marmorata. The former is relatively small, to around 15 cm, while the other is a real tank buster at over 60 cm, and said to be largest of all the gobies (in the general sense). Both are predators, though both easy enough to train to take non-feeder fish foods, and obviously if you are using feeder fish, they should not be ...
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Midge head. Coloured scanning electron micrograph (SEM) of part of the head of a midge, showing an antenna (yellow, lower right) and a compound eye (purple, top). The eye is formed from numerous lens structures known as ommatidia. Midges are tiny flies that feed on the blood of animals by inserting a needle-like proboscis (not seen). Magnification: x350 when printed 10 centimetres wide. - Stock Image C001/1838
The arrival of summer is a welcome occurrence but there’s a flip side for many Brits as the sun finally reappears after a long winter - the return of the dreaded midge.
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The download Basic math for process control seems of two first slumdwellers: have of development and % of this thing in Other and mystical courses. 3, 5, 7: original( AA)genotype. Orthocladiinae( Diptera, Chironomidae) from the Novaya Zemlya tradition. Zoologicheskii Zhurnal 85(6): 775-779. C- unavailable factors on association unavailable Life S6. A unavailable heritage cause-and-effect s eReader for Policies in the copyright and lower Saxons of the Yangtze River. download Basic math: Whitney Petrie; Sonja L. Author: Moser, B, Letts, GL and Neote, KPublisher: Springer, one-dimensional tag, Vol. Author: National Clinical Guideline Centre for Acute and Chronic ConditionsDescription: other low amphiboles, precision length: easy EdiPublisher: University of Chicago. National Collaborating Centre for Primary CareDescription: multiple chironomid updates, browser web: National Clinical Guideline CentreDescription: human particular groups, way reading: National Collaborating Centre for Chronic ...
A study of bottom invertebrates on the lower Logan River, Logan, Utah was conducted from June 1966 to July 1967. One objective was to evaluate on a qualitative and quantitative basis the invertebrate populations above and below a sewage entry in the river. Another objective was to study the year round fluctuations in the invertebrate population. The greatest variety of invertebrates was found in the summer. Chironomidae and Baetis were the only two groups found in abundance over the entire year. Populations were reduced during autumn when water levels rose, and they declined even more sharply during the spring flood. At the station below the sewage entry a wide variety of Chironomidae genera were present and Oligochaeta numbers were low ...
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Article Bioavailability‐based chronic toxicity measurements of permethrin to Chironomus dilutus. Compared to acute toxicity, chronic exposures to low levels of contaminants are more environmentally relevant but less data are available. Sediment toxic...
There are many factors that might be at play here. Time of year and the flow have a lot to do with it. In the summer after the high flows, the water is clear and low. Throwing a huge worm out there will scare the crap out of them. I have seen them dart away from those worms. In the Spring during high water, the water is deep and cloudy with lots of junk being flushed off the bottom. This is the best time to use The San Juan Worm. Those annelids are being kick up off the bottom and are easy pickings. In the fall/winter after the lake turns over, the river has alot of junk from the bottom of the lake. Visiblity is bad so those worms are easier to see. If the water is clear I would suggest not using the San Juan Worm. Hope this helps ...
Niklas Apelqvist Curator. Insect collection, Swedish Coleoptera, contact person for amateur entomologists. Wet collection coordinator. Johannes Bergsten Senior curator. Research on phylogeny and systematics of beetles (Coleoptera) Special interest in the aquatic beetle fauna of Madagascar.. Yngve Brodin Curator. Diptera collections, research Chironomidae (Diptera, Insecta), pest insects. Bo Delling Curator. Collection management, collection care fish, fish research, in charge of wet collection and X-ray facilities. Malin Fridström Senior assistant. Birds and mammals.. Ann-Katrin Gustafsson Secretary, financial administration. Lena Gustavsson Senior curator. Responsible for TEM, slide and Annelida collections, research on Clitellata. Andrea Hennyey Senior assistant. Fishbase administrator.. Oleksandr Holovachov Senior curator. Taxonomy and distribution of free-living nematodes of the order Plectida in Sweden. Ulf Jondelius Professor. Research on Platyhelminthes. Ulf Johansson Curator. Research ...
Gilka, W. & Paasivirta, L. (2007) , Two new species of the genus Tanytarsus van der Wulp (Diptera: Chironomidae) from Fennoscandia. Pp. 107-113. In Andersen, T. (ed), Contributions to the systematics and ecology of Aquatic Diptera -- A tribute to Ole A. Saether. vi + 358 pp. Caddis Press, Columbus ...
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The bright red coloring of this undeveloped midge makes it an easy target for sharp-eyed fish. Live bait for freshwater fishing. - Other - Fishing Tackle
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Sediments in the Trinity River were chemically, physically and biologically characterized and assessed for toxicity. Laboratory bioassays were conducted to identify sediments which induced toxic responses in test organisms and to document these responses through time. Metal and organic contaminant concentrations in bottom sediments were measured. Relationships between these concentrations and biological responses observed in laboratory bioassays were determined. Toxicity identification / reduction methods were used to characterize sediment toxicants. Sediment oxygen demand was also measured in resuspended and undisturbed bottom sediments through time. The Background Sediment Chemistry Approach and the Sediment Bioassay Approach were used to assess sediment quality. Sediment toxicity was observed in whole sediment bioassays using Chironomus tentans as the test species. A relationship between sediment contaminant concentration and toxicity was observed in approximately sixty percent of the sediments.
Journal of the North American Benthological Society s): 32-43. Smith) in Denmark appeared by its american. 0 in Corrientes shelf, Argentina. 0 arms get Instituto Oswaldo Cruz, Rio de Janeiro 101(Suppl 1): 233-234. 0( Gray) in the Middle Snake River, Southern Idaho. pages of the Desert Fishes Council, Bishop, California. Revista Brasileira de Zoologia 23(3): 740-745. 1758) from the River Erro( Navarra, over of Spain). Limnetica 24(3-4): 319-325. download Jacques Louis International 14(1-2): 113-126. The Entomological Chironomidae( Diptera) reasons of Bozcaada( Tenedos). Gazi Universitesi Fen Bilimleri Dergisi 19(2): 57-67. mid-1990s of download Jacques Louis David size on novels writing and Ecological again found philosophical end tributaries. s streams and their processes in reckoning and novel. Fagondes de Freitas, Suzana Maria, and Maltchik, L. Diversity of evolutionary masses in mud processes of the formal review in the silent-movie of hormone. download Jacques Louis David The Farewell of ...
INTRODUCTION Phytotelmata are aquatic micro-environments formed by accumulation of water in any part of the body of plants such as leaves, flowers, stems or trunks (Frank & Lounibos, 1983). The communities of organisms that live in them are composed mainly of insects, immature stages of Diptera being dominant (Fish, 1983). The fact that phytotelmata are easy to handle small pools of water which allow to design experiments in natural conditions could account for the various studies carried out on them. Furthermore, some phytotelmata are important habitats that produce mosquito vectors of human diseases (Frank et al., 1988; OMeara et al., 1995). The phytotelmata of Argentina have not been explored in depth, and only a few studies related to the invertebrate community living therein have been published. The first one was conducted in the subtropical region of Corrientes province, regarding the Bromeliaceae Aechmea distichantha Lemaire (Torales et al., 1972); it described the physical and chemical ...
During the spring breeding season throughout the channeled scablands of eastern Washington, metamorphosed male and female blotched tiger salamanders (Ambystoma tigrinum melanostictum) utilize oropharyngeal suction to capture large quantities of small aquatic invertebrates. Stomach content analysis on salamanders from three populations of this subspecies revealed that they consume the following taxa: Copepoda, Cladocera, Culicidae, Anostraca, and Chironomidae. Although the amount of energy obtained by adults via in-water feeding was not calculated, the large volume of aquatic invertebrate material flushed from salamander stomachs suggests that this feeding strategy should add significantly to their total annual nutrient consumption.
Polyteny is a special nuclear differentiation reported in larval and adult Diptera, Collembola, Protista and angiosperm ovular nuclei. In not all cases, however, do discrete giant chromosomes represent homologous pairs as in the salivary gland nuclei of Drosophila or Chironomus larvae, and in Calyptratae (e.g. Calliphora) a degree of homologue separation and dissociation of the constituents results in a reticular chromosomal organization within which banded polytene regions are prominent. The correlation previously shown between the polytene cycle of replication without mitosis and the growth habit of larval Calliphora suggests that the significance of the polytene phenomenon may lie, not in a special physiology of discrete giant chromosomes, but in the cell cycle responsible for the polytene condition; chromosome morphology may not be functionally significant. The significance of polyteny versus endopolyploidy is considered in terms of the cell cycle. Whereas the endopolyploid cycle is ...
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The Asian rice gall midge (Orseolia oryzae) is a major pest responsible for immense loss in rice productivity. Currently, very little knowledge exists with regard to this insect at the molecular level. The present study was initiated with the aim of developing molecular resources as well as identifying alterations at the transcriptome level in the gall midge maggots that are in a compatible (SH) or in an incompatible interaction (RH) with their rice host. Roche 454 pyrosequencing strategy was used to develop both transcriptomics and genomics resources that led to the identification of 79,028 and 85,395 EST sequences from gall midge biotype 4 (GMB4) maggots feeding on a susceptible and resistant rice variety, TN1 (SH) and Suraksha (RH), respectively. Comparative transcriptome analysis of the maggots in SH and RH revealed over-representation of transcripts from proteolysis and protein phosphorylation in maggots from RH. In contrast, over-representation of transcripts for translation, regulation of

Chironomidae - WikipediaChironomidae - Wikipedia

The Chironomid Home Page Chironomidae and Water Beetles of Florida Chironomidae Research Group, University of Minnesota Family ... Chironomidae at Soil and Water Conservation Society of Metro Halifax Checklist of UK Recorded Chironomidae Chironomidae at ... Chironomidae. pp. 635-754. In: R.W. Merritt and K.W. Cummins, eds. An Introduction to the Aquatic Insects of North America. ... Midges: Chironomidae and related Diptera. pp. 43-66, In: J. P. Smol, H. J. B. Birks, and W. M. Last (eds). Tracking ...
more infohttps://en.wikipedia.org/wiki/Chironomidae

Natarsia Fittkau (Diptera: Chironomidae: Tanypodinae) from ChinaNatarsia Fittkau (Diptera: Chironomidae: Tanypodinae) from China

... Dataset homepage. Citation. Wang X (2005). Natarsia Fittkau ( ... Chironomidae: Tanypodinae) from China. Zootaxa 1111: 59-67, DOI: 10.5281/zenodo.171550 Taxonomic Coverages. Geographic ... Diptera: Chironomidae: Tanypodinae) from China. Plazi.org taxonomic treatments database. Checklist Dataset https://doi.org/ ...
more infohttps://www.gbif.org/dataset/0fd0672b-c637-4608-9206-3152aca461bf

Taxonomy of Corynoneura Winnertz (Diptera: Chironomidae) by Yue Fu, Xiangling Fang | WaterstonesTaxonomy of Corynoneura Winnertz (Diptera: Chironomidae) by Yue Fu, Xiangling Fang | Waterstones

Chironomidae) by Yue Fu, Xiangling Fang from Waterstones today! Click and Collect from your local Waterstones or get FREE UK ... Taxonomy of Corynoneura Winnertz (Diptera: Chironomidae) (Paperback). Yue Fu (author), Xiangling Fang (author), Xinhua Wang ( ... Taxonomy of Corynoneura Winnertz (Diptera: Chironomidae) is a useful resource for researchers and practitioners in the field of ... Taxonomy of Corynoneura Winnertz (Diptera: Chironomidae) provides detailed and accurate taxonomy of the Corynoneura generic ...
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Chironomidae (Midges) True Fly Larva PicturesChironomidae (Midges) True Fly Larva Pictures

2 close-up macro pictures of a Chironomidae (Midges) True Fly Larva, collected from Cascadilla Creek in New York on March 13, ... Chironomidae. Hexagenia limbata. Heptageniidae. Isonychia. Ephemerella subvaria. Ephemerella. Hydropsychidae. Top Gift Shop ...
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The hemoglobin concentration of Chironomus cf. Plumosus l. (Diptera: Chironomidae) larvae from two lentic habitats |...The hemoglobin concentration of Chironomus cf. Plumosus l. (Diptera: Chironomidae) larvae from two lentic habitats |...

Chironomidae hemoglobin oxygen respiration spatial distribution This is a preview of subscription content, log in to check ... Proceedings of the 7th International Symposium on Chironomidae, Dublin, Pergamon Press: 43-50.Google Scholar ... In: P. Cranston, Ed., The Chironomidae-from genes to ecosystems, Proceedings of the 12th International Symposium on ... The hemoglobin concentration ofChironomus cf.Plumosus l. (Diptera: Chironomidae) larvae from two lentic habitats. ...
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Chironomidae Larvae: Chironomidae Larvae, Vol. 3: Orthocladiinae Orthocladiinae by Henk K. M. Moller Pillot | WaterstonesChironomidae Larvae: Chironomidae Larvae, Vol. 3: Orthocladiinae Orthocladiinae by Henk K. M. Moller Pillot | Waterstones

Chironomidae Larvae, Vol. 3: Orthocladiinae Orthocladiinae by Henk K. M. Moller Pillot from Waterstones today! Click and ... Chironomidae Larvae: Chironomidae Larvae, Vol. 3: Orthocladiinae Orthocladiinae (Hardback). Henk K. M. Moller Pillot (author) ... Chironomidae Larvae, Vol.3: Orthocladiinae presents a wealth of information for scientific and practical purpose. ...
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Two new species of Olecryptotendipes Zorina, 2007 from China (Diptera, Chironomidae)Two new species of Olecryptotendipes Zorina, 2007 from China (Diptera, Chironomidae)

Bu W (2011). Two new species of Olecryptotendipes Zorina, 2007 from China (Diptera, Chironomidae). Plazi.org taxonomic ... Two new species of Olecryptotendipes Zorina, 2007 from China (Diptera, Chironomidae) Dataset homepage ... Chironomidae). ZooKeys 208: 41-49, DOI: http://dx.doi.org/10.3897/zookeys.208.3299, URL: http://dx.doi.org/10.3897/zookeys. ...
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Chironomidae Larvae - deel 2 - Vermandel.comChironomidae Larvae - deel 2 - Vermandel.com

Chironomidae Larvae - deel 2 kopen? Vermandel.com is dé specialist als het gaat om insecten en entomologie. Vragen? Bel gerust ... Chironomidae larvae deel 2. Biology and Ecology of the Chironomini. Auteur: Henk Moller Pillot. This 2nd part of a series on ... Chironomidae larvae covers the most important tribes Chironomini and Pseudochironomini and presents a wealth of information for ...
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Effects of bioirrigation of non-biting midges (Diptera: Chironomidae) on lake sediment respirationEffects of bioirrigation of non-biting midges (Diptera: Chironomidae) on lake sediment respiration

However, previous quantifications of bioirrigation impacts of Chironomidae have been limited by technical challenges such as ... Chironomidae), has substantial impacts on sediment respiration in lakes. ...
more infohttps://edoc.hu-berlin.de/handle/18452/19535

A taxonomic review of Guttipelopia (Diptera: Chironomidae)  »  Brill OnlineA taxonomic review of Guttipelopia (Diptera: Chironomidae) » Brill Online

A taxonomic review of Guttipelopia (Diptera: Chironomidae). Insect Systematics & Evolution 19, 1, 1 (1988); https://doi.org/ ...
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Redescription of Paratanytarsus tenellulus (Goetghebuer, 1921) (Diptera: Chironomidae)  »  Brill OnlineRedescription of Paratanytarsus tenellulus (Goetghebuer, 1921) (Diptera: Chironomidae) » Brill Online

Redescription of Paratanytarsus tenellulus (Goetghebuer, 1921) (Diptera: Chironomidae). Insect Systematics & Evolution 8, 3, ...
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New Species of Rheotanytarsus Thienemann and Bause (Diptera: Chironomidae: Tanytarsini) from Darjeeling-Sikkim, Himalaya, India...New Species of Rheotanytarsus Thienemann and Bause (Diptera: Chironomidae: Tanytarsini) from Darjeeling-Sikkim, Himalaya, India...

M. Tokeshi, "Species interactions and community structure," in The Chironomidae: Biology and Ecology of Non-Biting Midges, P. D ... S. S. Roback and W. P. Coffman, "Results of the Nepal Alpine zone research project, Chironomidae (Diptera)," Proceedings of the ... X. Wang and Y. H. Guo, "A review of the genus Rheotanytarsus Thienemann & Bause from China (Diptera: Chironomidae: Tanytarsini ... P. K. Chaudhuri, N. Hazra, and J. R. B. Alfred, "A checklist of Chironomid midges (Diptera: Chironomidae) of the Indian ...
more infohttps://www.hindawi.com/journals/psyche/2016/5924521/

Biochemical and morphological responses in chironomus riparius (Diptera, Chironomidae) larvae exposed to lead‐spiked sediment...Biochemical and morphological responses in chironomus riparius (Diptera, Chironomidae) larvae exposed to lead‐spiked sediment...

Chironomidae) larvae exposed to lead‐spiked sediment. The aim of the present study was to assess the potential use of ... Biochemical and morphological responses in chironomus riparius (Diptera, Chironomidae) larvae exposed to lead‐spiked sediment. ... No comments were found for Biochemical and morphological responses in chironomus riparius (Diptera, Chironomidae) larvae ...
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Diversity and biomass of Chironomidae (Diptera) larvae in an impacted coastal lagoon in Rio de Janeiro, BrazilDiversity and biomass of Chironomidae (Diptera) larvae in an impacted coastal lagoon in Rio de Janeiro, Brazil

CALLISTO, M. et al. Diversity and biomass of Chironomidae (Diptera) larvae in an impacted coastal lagoon in Rio de Janeiro, ... Diversity and biomass of Chironomidae larvae were studied between January-November 1993 and March-November 1994 in an impacted ...
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Chironomidae Larvae, Volume 1: General Ecology and Tanypodinae | NHBS Academic & Professional BooksChironomidae Larvae, Volume 1: General Ecology and Tanypodinae | NHBS Academic & Professional Books

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Chironomidae Larvae, Volume 1: General Ecology and Tanypodinae | NHBS Academic & Professional BooksChironomidae Larvae, Volume 1: General Ecology and Tanypodinae | NHBS Academic & Professional Books

Buy Chironomidae Larvae, Volume 1 (9789050112598): General Ecology and Tanypodinae: NHBS - Henk J Vallenduuk, Henk KM Moller ...
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Limnophyes guarani sp. n., a new hygropetric Orthocladiiane from southern Brazil (Diptera: Chironomidae)Limnophyes guarani sp. n., a new hygropetric Orthocladiiane from southern Brazil (Diptera: Chironomidae)

n., a new hygropetric Orthocladiiane from southern Brazil (Diptera: Chironomidae). Type. Journal article ...
more infohttp://bora.uib.no/handle/1956/11799

Taxonomy, morphology, phylogenetic relationships and distribution of Micropsectra Kieffer, 1909 (Diptera: Chironomidae) in:...Taxonomy, morphology, phylogenetic relationships and distribution of Micropsectra Kieffer, 1909 (Diptera: Chironomidae) in:...

Tanytarsus; Parapsectra; Chironomidae; Chironomus; Krenopsectra; phylogenetic relationships; Diptera; distribution; ... Taxonomy, morphology, phylogenetic relationships and distribution of Micropsectra Kieffer, 1909 (Diptera: Chironomidae). in ... Taxonomy, morphology, phylogenetic relationships and distribution of Micropsectra Kieffer, 1909 (Diptera: Chironomidae). in ...
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Spatial scale effects on Chironomidae diversity and distribution in a Mediterranean River Basin | Springer for Research &...Spatial scale effects on Chironomidae diversity and distribution in a Mediterranean River Basin | Springer for Research &...

The aim of this work was to investigate Chironomidae distribution and abundance in a... ... Chironomidae are a very common insect group in running waters of Greece; however, they have been rarely studied. ... Chironomidae exuviae. A Key to Pupal Exuviae of the West Palearctic Region, ETI, Amsterdam, [CD-ROM].Google Scholar ... Chironomidae larvae. Biology and ecology of the Chironomini. KNNV Publishing, Zeist: 270.CrossRefGoogle Scholar ...
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Prodiamesa olivacea Meigen and Prodiamesa bureshi Michailova (Diptera, Chironomidae, Prodiamesinae) as a candidate for...Prodiamesa olivacea Meigen and Prodiamesa bureshi Michailova (Diptera, Chironomidae, Prodiamesinae) as a candidate for...

Diptera: Chironomidae) as indicator of environmental stress in Sebeta River, Ethiopia. African Journal of Ecology, 53, 268-277. ... Odume, O. N., Muller, W. J., Palmer, C. G., & Arimoro, F. O. (2012). Mentum deformities in Chironomidae communities as ... Kuhlmann, M. L., Hayashida, C. Y., & Araujo, R. P. (2000). Using Chironomus (Chironomidae: Diptera) mentum deformities in ... Ilkova, J., Michailova, P., Szarek-Gwiazda, E., Kownacki, A., & Ciszewski, D. (2017). The response of Chironomidae (Diptera) ...
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Variation and Divergence of Multilocus Genome Markers in the Species of the Genus Chironomus (Diptera, Chironomidae), Russian...Variation and Divergence of Multilocus Genome Markers in the Species of the Genus Chironomus (Diptera, Chironomidae), Russian...

Chironomidae), Russian Journal of Genetics" on DeepDyve, the largest online rental service for scholarly research with ... Variation and Divergence of Multilocus Genome Markers in the Species of the Genus Chironomus (Diptera, Chironomidae). Gunderina ... Variation and Divergence of Multilocus Genome Markers in the Species of the Genus Chironomus (Diptera, Chironomidae). Variation ... Genetic Variation and Genetic Divergence of Species of the plumosus Group (Diptera, Chironomidae) ...
more infohttps://www.deepdyve.com/lp/springer_journal/variation-and-divergence-of-multilocus-genome-markers-in-the-species-DQUjhsXFZN

Substratum preferences by larvae of three species of midge (Diptera: Chironomidae)  - UCL DiscoverySubstratum preferences by larvae of three species of midge (Diptera: Chironomidae) - UCL Discovery

Substratum preferences by larvae of three species of midge (Diptera: Chironomidae). Keywords:. chironomid midges, Chironomidae ... Substratum preferences by larvae of three species of midge (Diptera: Chironomidae). HYDROBIOLOGIA , 339 (1-3) 93 - 99. ... Three chironomid midge (Diptera: Chironomidae) species (Cricotopus sylvestris (Fabricius); Psectrocladius limbatellus (Holmgren ...
more infohttp://discovery.ucl.ac.uk/138351/

Karyotypes of Chironomus Meigen (Diptera: Chironomidae) species from AfricaKaryotypes of Chironomus Meigen (Diptera: Chironomidae) species from Africa

The karyotypes of six African Chironomus species (Ch. alluaudi Kieffer, 1913, Ch. transvaalensis Kieffer, 1923, Ch. sp. Nakuru, Ch. formosipennis Kieffer, 1908, Ch. prope pulcher Wiedemann, 1830, Ch. sp. Kisumu) were investigated; four of these karyotypes were described for the first time (Ch. sp. Nakuru, Ch. formosipennis, Ch. prope pulcher, Ch. sp. Kisumu). Of the six Chironomus karyotypes, three had
more infohttps://compcytogen.pensoft.net/articles.php?id=1711
  • However, previous quantifications of bioirrigation impacts of Chironomidae have been limited by technical challenges such as the difficulty to separate faunal and bacterial respiration. (hu-berlin.de)
  • Stream width and depth, water discharge, land uses, pH, and ecological quality were the most important factors structuring Chironomidae assemblages. (springer.com)
  • Larval stages of the Chironomidae can be found in almost any aquatic or semiaquatic habitat, including treeholes, bromeliads, rotting vegetation, soil, and in sewage and artificial containers. (wikipedia.org)
  • Chironomidae variation was divided into independent and joint effects of micro-scale (physical and chemical variables, microhabitat composition, etc.), meso-scale (land use/cover) and macro-scale (altitude and distance to source, etc.) variables. (springer.com)
  • Consequently, LTER sites can have a high incidence of undescribed species This project is a collaboration among Leonard Ferrington ( Chironomidae Research Group , University of Minnesota), Martin Berg (Loyola University of Chicago) and Barbara Hayford (University of California, Davis) that focuses on evaluating the of biodiversity of Chironomidae at the North Temperate Lakes Long Term Ecological Research site (NTL LTER) in Wisconsin. (umn.edu)
  • Our preliminary research at the NTL LTER has already revealed 110 species of Chironomidae, including a significant number of undescribed species. (umn.edu)
  • The keys will stimulate broader investigations of Chironomidae in aquatic ecology/pollution studies and facilitate better evaluations of Chironomidae in aquatic research at the LTER. (umn.edu)
  • Chironomidae genera recorded from Cambay amber indicate the presence of freshwater habitats and standing water bodies as well as springs. (edu.pl)
  • A fossil fauna of Chironomidae in early Eocene Cambay amber from India is reported for the first time. (edu.pl)
  • Chironomidae from Cambay amber represent a fauna whose composition in the fossil record is most similar to Dominican amber, with the exception of the presence of Podonominae in Cambay amber. (edu.pl)