Relevant bibliographies by topics / Simulium (Diptera: Simuliidae)

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Academic literature on the topic 'Simulium (Diptera: Simuliidae)'

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Published: 18 May 2024

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Journal articles on the topic "Simulium (Diptera: Simuliidae)"

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Limberger, Patricia Maria, David Augusto Reynalte Tataje, Darlan Novicki, Luiz Carlos Marmilicz Junior, and Milton Norberto Strieder. "Spatio-temporal distribution of preimaginal black flies (Diptera: Simuliidae) in streams of a sub-basin of the Uruguay river basin, southern Brazil." EntomoBrasilis 14 (September 1, 2021): e946. http://dx.doi.org/10.12741/ebrasilis.v14.e946.

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Adult females of most black flies species (Diptera, Simuliidae) exhibit a blood-sucking habit. Immature stages develop in water courses and are important in the ecology of lotic environments. We aim to understand the distribution of immature simuliids in the hydrographic sub-basin of the Comandaí river, in Northwest of Rio Grande do Sul, Brazil. For that purpose, simuliids were sampled in three stretches (source, intermediate and mouth) of nine streams, distributed along the three main regions of the sub-basin. Evaluations of the influence of abiotic factors in different spatial and temporal scales were made. Sampling was carried out in two seasons: between September and November 2016 (spring), and between April and July 2017 (autumn). In total, 17,146 individuals were sampled (larvae of last instars and pupae), which resulted in the identification of eleven Simuliidae species. The most abundant species were Simulium pertinax Kollar (77.55%), followed by Simulium incrustatum Lutz (14.56%) and Simulium subpallidum Lutz (2.35%). Regarding the identification of indicator species, S. pertinax, Simulium jujuyense Paterson & Shannon, S. subpallidum and Simulium orbitale Lutz stood out in mouth stretches, and Simulium rubrithorax Lutz in source stretches. Environmental variables such as conductivity, altitude, canopy cover and stream width were interpreted as important conditioning factors for the distribution of simuliid immature stages. In general, we concluded that Simuliidae are more abundant during spring in the study area, mainly downstream. This information may contribute to the implementation of efficient measures to control species of health importance in southern Brazil.
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Cuadrado, Luz A., Ligia I. Moncada, Gabriel A. Pinilla, Aitor Larrañaga, Aura I. Sotelo, and Peter H. Adler. "Black Fly (Diptera: Simuliidae) Assemblages of High Andean Rivers Respond to Environmental and Pollution Gradients." Environmental Entomology 48, no. 4 (May 23, 2019): 815–25. http://dx.doi.org/10.1093/ee/nvz053.

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Abstract Simuliid larvae are common inhabitants of mountain rivers throughout the world, where they can serve as ecological indicators. Black flies were sampled during three seasons in four rivers in the upper basin of the Bogotá River in the Colombian Andes, and physical, chemical, and hydrological data were recorded. Multivariate methods were used to determine the relationships between the presence and abundance of simuliid species and environmental characteristics. Fourteen species were found: eight in the genus Gigantodax (Enderlein, Diptera, Simuliidae) and six in the genus Simulium (Latreille, Diptera, Simuliidae). Dissolved oxygen, dissolved solids, redox potential, chemical oxygen demand, and nutrients contributed to an explanation of species distributions. Species in clean waters and in more polluted waters had narrow niches; those in low to moderately polluted waters had broader niches. Species in the lower reaches of the watercourses had greater turnover, perhaps because the most sensitive species had disappeared and been replaced by more tolerant species. Thus, simuliids can be used as predictors of environmental characteristics of Andean rivers and can be useful in the evaluation and management of these watersheds.
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Evans, Christopher L., and Peter H. Adler. "Microsculpture and phylogenetic significance of the spermatheca of black flies (Diptera: Simuliidae)." Canadian Journal of Zoology 78, no. 8 (August 1, 2000): 1468–82. http://dx.doi.org/10.1139/z00-078.

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The highly varied spermatheca of black flies provided an under-studied character system for phylogenetic reconstruction of the Simuliidae. Scanning electron microscopy of the spermatheca of 17 simuliid species elucidated folds and spicules on the inner surface; callosities, anastomosing ridges, and minute tubercles on the outer surface; and an intricately fluted spermathecal duct. The spermatheca of Parasimulium crosskeyi, the most plesiomorphic taxon, had a slightly wrinkled inner surface and an outer surface with acutely raised polygonal ridges. Species hypothesized to be among the basal lineages of the simuliids (e.g., Helodon susanae and Prosimulium magnum) had an irregularly folded inner spermathecal surface, but their relationships were not well resolved on the basis of information about the spermatheca. More evolutionarily derived species, including a number of species in the genus Simulium, had short or filiform spicules on the inner surface of the spermatheca. Although the use of a single character system, the spermatheca, did not fully resolve relationships among Simuliidae, its utility as a rich source of phylogenetic information was demonstrated.
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Başören, Özge, and Nilgün Kazanci. "The Distributional Data of Simuliidae (Insecta, Diptera) Species in Yeşilirmak River (Turkey)." Transylvanian Review of Systematical and Ecological Research 17, no. 1 (June 1, 2015): 29–38. http://dx.doi.org/10.1515/trser-2015-0046.

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Abstract This research aims to investigate the Simuliidae fauna of Yeşilırmak River basin and determine the species composition of the collecting sites. The study was carried out in July 2008 and June 2009. One genus and eleven species (Metacnephia sp., Metacnephia subalpina, Simulium (Eusimulium) angustipes, Simulium (Nevermannia) costatum, Simulium (Simulium) argenteostriatum, Simulium (Simulium) bezzii, Simulium (Simulium) ornatum, Simulium (Simulium) trifasciatum, Simulium (Simulium) variegatum, Simulium (Wilhelmia) balcanicum, Simulium (Wilhelmia) lineatum and Simulium (Wilhelmia) pseudequinum) were recorded from 16 collecting sites. The distribution and abundance of Simuliidae species reflect the changes in water quality of Yeşilırmak River, due to agricultural activities and urban areas.
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Zwick, Heide. "Identity of Simulium rostratum (Diptera: Simuliidae)." Aquatic Insects 9, no. 1 (January 1, 1987): 26. http://dx.doi.org/10.1080/01650428709361266.

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Đuknić, Jelena, Vladimir M. Jovanović, Nataša Popović, Ivana Živić, Maja Raković, Dubravka Čerba, and Momir Paunović. "Phylogeography of Simulium Subgenus Wilhelmia (Diptera: Simuliidae)—Insights From Balkan Populations." Journal of Medical Entomology 56, no. 4 (April 10, 2019): 967–78. http://dx.doi.org/10.1093/jme/tjz034.

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Abstract Many morphologically similar species of the simuliid (Diptera: Simuliidae) subgenus Wilhelmia, Enderlein are difficult to distinguish. Thus, the revision of the subgenus using various morphological, cytogenetic, and genetic analyses has been attempted. Neglected until now, the Balkan Peninsula, a crossroad between Europe and Anatolia, provides insight which could resolve problematic interrelationships of the taxa within this subgenus. To uncover the status and relations within the subgenus Wilhelmia, mtDNA was extracted from 47 individuals of six morphospecies: Simulium balcanicum (Enderlein, 1924), Simulium turgaicum Rubtsov, 1940, Simulium lineatum (Meigen, 1804), Simulium pseudequinum Séguy, 1921, Simulium equinum (Linnaeus, 1758), and Simulium paraequinum Puri, 1933 from 21 sites throughout the Balkan Peninsula. Phylogenetic analysis of the Wilhelmia species using mitochondrial DNA barcoding (COI) gene showed two major branches, the lineatum branch, which includes the lineages sergenti, paraequinum, and lineatum, and the equinum branch. In the equinum branch, the mtDNA sequences formed six clades, with high genetic distances, suggesting the existence of different species. Historically, the clades of the equinum branch appeared at numerous islands, perhaps as a result of allopatric speciation. The paraequinum lineage (lineatum branch) is composed of two species. However, six clades of the lineatum lineage overlapped with intra- and interspecific genetic distances. Our results revealed that the species S. balcanicum, S. pseudequinum B, and S. equinum were omnipresent in the Balkans. The results point to not only the fair diversity of Wilhelmia species in the Balkans, but also indicate that most Wilhelmia species live in sympatry.
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TAKAOKA, HIROYUKI. "Simulium (Simulium) weji sp. nov. (Diptera: Simuliidae) from Thailand." Japanese Journal of Tropical Medicine and Hygiene 29, no. 4 (2001): 349–54. http://dx.doi.org/10.2149/tmh1973.29.349.

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CRAIG, DOUGLAS A. "Three new species of Inseliellum (Diptera: Simuliidae) from Polynesia." Zootaxa 450, no. 1 (March 4, 2004): 1. http://dx.doi.org/10.11646/zootaxa.450.1.1.

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Three new species of the simuliid subgenus Inseliellum are described. Simulium adelaideae, from Tahiti, appears to be closely related to the hirticranium subgroup and may constitute the sister species of that taxon. Simulium sublonckei, also from Tahiti, is the sister species of S. lonckei plus S. joyae. The third new species, Simulium englundi, from the Marquesas Islands, is closely related to S. gallinum. The Tahitian species are both from higher altitude localities and bring the number of known species for that island to 31. There are now 10 species known from the Marquesas islands, for a total of 51 species in Inseliellum.
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Mukherjee, Arka, Atanu Naskar, Oishik Kar, Debdeep Pramanik, and Dhriti Banerjee. "A checklist of black flies (Diptera, Simuliidae) from India." ZooKeys 1118 (August 24, 2022): 111–18. http://dx.doi.org/10.3897/zookeys.1118.84686.

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An updated checklist of the family Simuliidae from India is presented. A total of 79 species of Simulium belonging to eight different subgenera are listed. Eleven species that were not reported in the previous checklist are added here. The present list contributes to a better understanding of the diversity of Simuliidae in India, as well as the impact of Simulium species on the public health of this mega-diverse country.
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CRAIG, DOUGLAS A., and NEAL L. EVENHUIS. "Society Islands beach bum black flies (Diptera: Simuliidae)." Zootaxa 4311, no. 3 (August 24, 2017): 373. http://dx.doi.org/10.11646/zootaxa.4311.3.3.

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Aspects of the body of work on the Central and Western Pacific black fly Simulium (Inseliellum) are briefly reviewed. Female adults collected from beaches in Tahiti and Raiatea are described as Simulium (Inseliellum) littopyga n. sp., Simulium (Inseliellum) littosocius n. sp. and Simulium (Inseliellum) littosodalis n. sp.. Immature stages of the three species are not associated.
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Dissertations / Theses on the topic "Simulium (Diptera: Simuliidae)"

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Gaona, Jairo Campos. "Estudos cromossomicos em populações de Simulium (Chirostilbia) pertinax (Diptera, Simuliidae)." [s.n.], 1997. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317200.

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Orientadores: Carlos Fernando S. Andrade, Shirlei M. Recco-Pimentel
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: Foram realizados estudos cromossômicos em seis populações de Simulium (Chirostilbia) pertinax do Brasil. Pela análise dos gânglios cerebrais larvais da população de Morungaba, SP verificou-se que a espécie apresenta um cariótipo com 2n=6 cromossomos, sendo dois pares metacêntricos e um par submetacêntrico. Com base em metodologia padronizada para a família Simuliidae, foram elaborados os mapas dos cromossomos politênicos de glândulas salivares larvais. Os cromos somos politênicos apresentaram constância morfológica no seu padrão de bandas. Não foi registrada qualquer constrição importante e regiões assinápticas foram raras. Também, não foram observados cromossomos B nem segmento diferencial do sexo. A comparação do padrão de bandas dos cromossomos politênicos com aquele "standard" do subgênero Simulium mostrou uma semelhança de cerca de 63% para várias regiões nos seis braços cromossômicos. Além da população de Morungaba (n=1O2), foram analisadas mais cinco populações de S. pertinax coletadas nos estados do Paraná (Tibaji, n=13), Rio Grande do Sul (Nova Petrópolis, n=14), Rio de Janeiro (Muriqui, n=40) e São Paulo (Barra do Una, n=38; e llhabela, n=48). Foram feitas comparações dos cromos somos politênicos dentro e entre seis populações. Os cromossomos politênicos apresentaram pareamento dos homólogos e conspícuas regiões centroméricas. As características morfológicas dos cromossomos politênicos, como centrômeros, marcadores universais, região organizadora nucleolar (NOR) e padrão de bandas, não apresentaram variação apreciável dentro e entre as populações, exceto um polimorfismo de expressão, uma região organizadora nucleolar secundária (NOR 2°) em um indivíduo. Apesar de quatro das populações apresentarem características bioecológicas diferentes e terem sofrido diferentes tipos de pressão de seleção por inseticidas, não foi observada diferenciação cromossômica. Pela homosseqüencialidade cromossômica verificada entre as seis populações sugere-se que a espécie seja monomórfica e os fatores genéticos de resistência aos inseticidas estejam espalhados no genoma sem uma expressão aparente em nível cromossômico
Abstract: Chromosornic studies were carries out for six populations of Simulium (Chirostilbia) pertinax of BraziI. The analysis of the larval cerebral ganglia from the population found in Morungaba, SP showed that the species presents a karyotype with 2n=6 chromosomes, two pairs being metacentric and one pair submetacentric. Based on standard methodology for the Simuliidae family, the polytene chromosome maps were made using the larval salivary glands. Polytene chromosomes banding pattems presented high morphological homology. No important constrictions were recorded and assinaptic regions were rare. AIso, neither B chromosomes nor a sex differential segment were observed. Comparison of polytene chromosome band pattems with that considered standard for the subgenus Simulium showed a similarity of about 63% for many regions in all the six chromosome arms. Besides the population obtained from Morungaba (n=1O2) a study was also made of five S. pertinax populations collected respectively in the states of Paraná (Tibaji, n=13), Rio Grande do Sul (Nova Petrópolis, n=14), Rio de Janeiro (Muriqui, n=40) and São Paulo (Barra do Una, n=38; and llhabela, n=48). Comparisons for the polytene chromosomes within and among the six populations were carried out. Polytene chromosomes showed band pairing among homologous chromosomes and conspicuous centromeric regions. No difference was observed for any morphological chromosome characteristics such as centromeres, universal markers, nuclear organizer region (NOR) and banding pattem within and among populations, except by one individual expression of polymorphism, a secondary NOR. No chromosomal differentiation associated to insecticide resistance was observed a1though four of the populations presented different bioecological features and suffered different selection pressures by insecticides. Due to the chromosomal homosequentiality found among the six populations it was suggested that S. pertinax is a monomorphic species and that the genetic factors for organophosphorous resistance are spread in the genome with no visually detectable morphologic expressions at the chromosome level
Mestrado
Biologia Celular
Mestre em Ciências Biológicas
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Biggs, Jeremy. "A study of filter-feeding behaviour in Simulium larvae (Diptera: Simuliidae)." Thesis, Royal Holloway, University of London, 1985. http://repository.royalholloway.ac.uk/items/b0e5aaa7-0643-43bc-9368-d49ee64681ae/1/.

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The structure of the mouthparts and distribution of cephalic sense organs of larval simuliids was investigated using the scanning electron microscope and methylene blue staining. The effect of water velocity, temperature and quality on larval feeding behaviour was studied in an artificial stream. Short, controlled, pulses of physical and chemical stimulants were injected into the water to observe their effect on larval feeding behaviour. Too rapid for the unaided eye, movements were described frame by frame from video recordings. Food is filtered from the water by the open cephalic fans. In alternation the fans are rapidly closed , swept by the mandible to remove food particles and opened again. The frequency of this endogenous behaviour pattern was modified by environmental factors that appeared to act mainly on the interval between fan beats. The interval between fan beats was found to be inversely related to water temperature and velocity and was also affected by water borne stimulants, being significantly shorter in unfiltered natural water than particle-free distilled water. Consequently fan cleaning frequency rose as water velocity and temperature were increased and when natural food was available. Larvae responded to pulses of a wide variety of chemical compounds with bursts of mandible and maxilla movements. Fan cleaning was inhibited when these mouthpart movements occurred but filtering continued. Short pulses of inert particles at a relatively high concentration caused a similar response but when a series of pulses was delivered bursts of mouthpart movements lengthened and the fans were often closed for longer than normal, inhibiting filtering. It is suggested that overstimulation of peripheral sense organs, responding to the physical and chemical qualities of food particles, initiates the inhibition of filtering. The temporary inhibition of feeding may regulate the rate of ingestion. A simple model of larval behaviour is proposed, recognising "food gathering" (filtering) and "food ingestion" (mouthpart movements) as its main components.
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Thapa, Sachin. "Diversity of Simulium (Diptera: Simuliidae) from Darjeeling Hills based on Chromosomal study." Thesis, University of North Bengal, 2017. http://hdl.handle.net/123456789/2781.

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Mizner, Jack H. "The secondary production dynamics of simulium taxodium and simulium lakei (diptera: simuliidae) in the Ogeechee River, Georgia." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/25222.

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Surtees, D. P. "Multivariate morphometrics and cytotaxonomy of the West African Simulium damnosum complex (Diptera : Simuliidae)." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233866.

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Branco, Junior Armando Castello. "Patologia e epizootiologia de Simulium pertinax (Diptera ; Simuliidae) infectado por Polydispyrenia simulii (Microspora ; Duboscquiidae) e Gastromermis viridis cf. (Nematoda ; Mermithidae)." [s.n.], 1994. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315369.

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Orientador: Mohamed E. M. Habib
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: No presente trabalho foram investigados vários aspectos da patologia e epizotiologia de dois agentes biológicos, o microsporídeo Polydispyrenia simulii (Microspora; Duboscquiidae) e o nematódeo Gastromermis viridis cf (Nematoda; Mermithidae), que ocorrem naturalmente no borrachudo Simulium pertinax (Dip.; Simuliidae) na região estudada. Esta espécie de borrachudo apresenta elevada antropofilia, sendo alvo de práticas de controle no sul e sudeste do Brasil. O objetivo principal é a obtenção de dados para a correta avaliação do potencial destes organismos como agentes de controle biológico natural dessa espécie de borrachudo. Quanto aos estudos sobre a microsporidiose em S. pertinax foram feitas investigações histológicas em hospedeiros sadios e doentes, nos diferentes estágios de seu desenvolvimento (larva, pupa e adulto). Verificou-se que em larvas e pupas de S pertinax doentes, o tecido adiposo visceral é o sítio principal de replicação e desenvolvimento do protozoário, havendo também o comprometimento do tecido muscular e do epitélio intestinal no hospedeiro no estágio de larva. No estágio de pupa verificou-se que por processos histolíticos tem-se a debelação da doença e consequente ausência de esporos na fase adulta de S. pertinax. Apesar de não se detectar a presença de esporos nos ovários de fêmeas tanto coletadas no campo como obtidas no laboratório, verificou-se que como consequência da infecção larval, os indivíduos adultos, inclusive machos, apresentam algum comprometimento das gônadas. As fêmeas apresentam uma redução média de 31,2% na fecundidade enquanto que nos machos há uma sensível redução da motilidade dos espermatozóides. Além disso, constatou-se que a manutenção da microsporidiose no campo deve-se muito provavelmente a mecanismos de transmissão horizontal visto que a transmissão vertical não foi confirmada pelas investigações. Quanto aos estudos sobre G. viridis cf em S. pertinax, temos que sua prevalência anual em populações larvais do hospedeiro é baixa, variando de 0,8% a 14,3%. Sua ocorrência parece estar relacionada à vazão do riacho e consequente velocidade de corrente d'água. As investigações histopatológicas revelaram que o tecido adiposo visceral das larvas hospedeiras é o principal alvo da parasitemia, havendo também o comprometimento do tecido muscular e glândulas salivares. Verificou-se ainda que a parasitemia por G. viridis cf. causa redução significativa da resposta comportamental das larvas parasitadas face a qualquer estímulo fisico-químico ou mecânico. Além disso, o retardo no desenvolvimento do hospedeiro larval também foi verificado. Esse fenômeno é conhecido como metatetelia. Os resultados obtidos indicam que o microsporídeo P. simulii tem um significativo papel no controle natural das populações de S. pertinax, uma vez que reduz em quase um terço a fecundidade das fêmeas e promove um menor período de motilidade dos espermatozóides dos machos. Por outro lado, G. viridis cf. apesar de exaurir as reservas da larva hospedeira não apresenta elevada prevalência indicando uma pequena influência na regulação das populações hospedeiras. Acreditamos que alguns estudos ainda são necessários para a correta avaliação do potencial de G. viridis cf. como agente de controle biológico natural de borrachudos. O uso de ambos os agentes, P. simulii e G. viridis cf., nos parece promissor como ferramentas auxiliares para o Manejo Integrado destes incômodos dípteros
Abstract: The aim of the present work is to evaluate the potentiality of Polyd;spyren;a s;mulii (Microspora; Duboscquiidae) and Gastromerm;s v;r;d;s cf (Nematoda; Mermithidae) as two agents for biological control of the blackfly S;mulium pertinax (Diptera; Simuliidae). Pathological and epizootiological aspects of both agents were investigated. Histopathological studies revealed that the visceral fat body of S. pertinax larvae and pupae showed to be the main site of infection for P. s;mulii. The microsporidiosis also atIected the muscular tissue and midgut epithelium of larvae. It was detected that during host pupal development the spores of P. s;mulii were lised, causing the adults to became free of infection. Although no infection was detected in adults originated ITom heavly infected larvae, the number of ovarian folicules of females, as well as the mobility of spermatozoids in males were reduced. It was also detected that vertical transmission does not work on the microsporidiosis maintenance in host populations of S. pertinax. The results also indicated that P. s;mulii has a high influence as a natural control agent of S. pertinax populations. Epizootiological studies reveal that the annual prevalence of the nematode G. v;r;d;s cf in S. pertinax larvae population is low, ranging from 0,8% to 14,3%. Histopathological investigations in infected larvae showed that the visceral fat body was the principal target site of mermithid infection. The muscular tissue and the salivary glands were also atIected. Infected larvae of S. pertinax showed a reduced behavioural response to physical stimulii. Parasitized individuais showed a slower development, known as metatetely. The low prevalence rate of G. v;r;d;s cf in S. pertinax larval populations indicates that its etIects on the blackfly natural control are very small. More studies are necessary for the correct evaluation of G. v;r;d;s cf as biological control agent of S. pertinax. However, both agents may be helpful weapons in Integrated Management Programmes of this medically important insect
Doutorado
Doutor em Ciências Biológicas
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Abebe, Makonnen. "Some studies on the salivary anticoagulant components of the black fly Simulium vittatum (Diptera: Simuliidae)." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186849.

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Three major experiments on the anticoagulant components of the saliva of some black fly species were conducted. These included investigations on anticoagulant activities against factor Xa and thrombin in the salivary gland extracts (SGE) of Simulium argus Williston, S. vittatum Zettersted, S. metallicum Bellardi, and S. ochraceum Walker using in vitro, chromogenic substrate assays, biochemical and molecular characterization of the anti-thrombin from the saliva of S. vittatum and determination of the target enzyme in the vertebrate coagulation cascade of a novel anticoagulant from the saliva of S. vittatum. The study on anticoagulant activities in the four simuliid species revealed factor Xa inhibition to be common in all four species while thrombin inhibition was detected only in S. argus and S. vittatum. Both bovine and human α-thrombins were inhibited with the highest activity occurring with S. argus SGE. Factor Xa inhibition was highest in S. ochraceum which is an anthropophilic species and vector of Onchocerca volvulus, and lowest in S. vittatum, a primiparous autogenous species that is also zoophilic. Total soluble SGE protein also varied among the four species with the highest concentration measured in S. ochraceum and the lowest in S. vittatum. In the second experiment, the anti-thrombin component of the saliva of S. vittatum was purified using a two-step reverse phase (RP) high performance liquid chromatography (HPLC) involving a C-8 macrosphere column. The molecular weight of the HPLC purified inhibitor was determined by laser desorption ionization mass spectrometry (LDI-MS) and was found to be 11,333 daltons. Studies on the effect of the molecule on other serine proteinases such as α-chymotrypsin, human neutrophil elastase, and human neutrophil cathepsin G showed that they are inhibited by the salivary anticoagulant. The N-terminal sequence for the first 35 amino acids was determined. The molecule has been named Simulidin. In the third experiment, a novel anticoagulant from the saliva of S. vittatum, with activities on factor V, was demonstrated using the activated partial thromboplastin time (APTT) in HPLC partially purified salivary lysate. Factor Xa and thrombin were unaffected by the inhibitor.
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Wilson, Michael David. "Morphological and molecular methods for the identification of adult female Simulium damnosum species complex (Diptera: Simuliidae) vectors of onchocerciasis." Thesis, University of Salford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239997.

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Amaral, Ana Margarida Ribeiro do. "Diversidade e aspectos bioecológicos de simulídeos (Diptera: Simuliidae) que ocorrem nos municípios adjacentes a construção da usina Hidrelétrica de Peixe-Angical, TO, Brasil." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6478.

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O objetivo desta Tese é realizar o levantamento taxonômico e avaliar a dinâmica populacional de Simuliidae em localidades sob influência do Aproveitamento Hidrelétrico de Peixe Angical, TO. Os simulídeos possuem abrangente distribuição geográfica, e os estágios imaturos utilizam ambientes lóticos como sítios de criação. Algumas espécies podem atuar como vetores de vírus, protozoários e helmintos, o que confere ao grupo importância médica e veterinária. O hábito hematofágico das fêmeas de simulídeos pode acarretar sérios prejuízos ao turismo; ocasiona baixa no rendimento escolar; e na agropecuária dificulta a execução do trabalho o que reduz a produtividade. Durante a construção de grandes empreendimentos ocorre em pouco tempo à introdução de contingente populacional com drástica transformação do meio. A intervenção do homem sobre os ecossistemas e o crescimento desordenado pode provocar desequilíbrio ecológico que propicia a proliferação de espécimes vetores com consequentes problemas médico sanitários. A maior parte dos trabalhos realizados com insetos vetores em áreas sob influência da construção de hidrelétricas se refere aos culicídeos. O estudo dos aspectos taxonômicos permitirá o levantamento da biodiversidade e o diferencial deste projeto está no estabelecimento da sazonalidade e dinâmica das populações de imaturos e adultos de simulídeos. As amostras foram obtidas em áreas de influência direta e indireta da UHE Peixe no rio Tocantins, em 12 pontos diferentes de coleta, nos municípios deJaú do Tocantins, Peixe, Palmeirópolis, Paranã e São Salvador do Tocantins. Foram realizadas bimestralmente de 2004 a 2007, um total de 24 campanhas para coleta em criadouros pré-selecionados, que acompanharam todas as fases de construção início das obras, formação do lago, funcionamento da Usina. OS dados abióticos foram aferidos, e os imaturos removidos do substrato manualmente por 10 minutos e posteriormente preparados para eclosão dos adultos. Parte do material foi identificado no Laboratório de Simulídeos e Oncocercose do Instituto Oswaldo Cruz, onde foram verificados novos registros específicos para a ocorrência de Simuliidae em Tocantins, além do assinalamento de espécies antropofílicas e/ou vetores de Onchocerca volvulus. Nas áreas usadas para a formação do lago houve desaparecimento de criadouros. O desmatamento ocorrido aliado ao vigor dos simulídeos que conseguem realizar voos de longas distâncias na procura de alimento ou locais adequados a oviposição devem ter contribuído para a dispersão de espécimes. Há relatos sobre a da ocorrência de oncocercose na área estudada, um foco foi demarcado na divisa de Goiás com Tocantins, municípios Paranã e Minaçu investigado a partir de um caso autóctone de oncocercose. Este estudo é relevante uma vez que o Brasil possui potencial hidroenergético e prevê a construção de inúmeras hidrelétricas nos próximos anos. É importante estudas as áreas impactadas, conhecer a sua biodiversidade e os aspectos bioecológicos de Simuliidae no país.
This project aims to carry out the taxonomic survey and population dynamics of Simuliidae in locations under the use influence of hydroelectric power station at Peixe Angical (Tocantins). Immature black-flies use lotic environments as rearing sites. Some species are vectors of viruses, protozoa or helminths, which assigns them medical as well as veterinary importance. The blood feeding habits of females affect rural life causing financial damages to tourism, declining of school performance and reducing of agricultural productivity. During the construction of large enterprises the need of hiring extra personnel drastically affects the environment. Human intervention on ecosystems as well as disorderly population growth can cause ecological imbalance added to significant vector proliferation causing health as well as sanitary problems. Deforestation and exploitation in the river beds also affect population of black-flies dynamics influencing their geographical distribution. In specialized literature, most of the work carried out in hydroelectric construction areas is referred to culicidae. Studies that mention black-flies in impacted areas by hydroelectric power stations in Brazil are restricted to taxonomic survey and brief comments on the formation of lakes with consequent disappearance of breeding sites in lotic environments. This research work is part of a larger project that studies the black-flies and their local associated entomological fauna, which will allow us to carry out its biodiversity surveillance. The differential of this project is to establish the seasonality and population dynamics of immature as well as adult black-flies. Samples were obtained in areas of direct and indirect influence of Peixe Hydroelectric power station in 12 different collecting sites in the municipalities of Peixe, Paranã, Palmeirópolis, Jaú and São Salvador do Tocantins. Were conducted bimonthly from 2004 to 2007, a total of 24 campaigns, which accompanied building phases: start of groundwork, lake formation and operation of the plant. All abiotic data were registered and immature black-flies removed from the substrate for 10 minutes and prepared for the outbreaking of adults. Part of the material has been identified at the Simuliidae and Onchocerciasis laboratory at Oswaldo Cruz Institute, where new records of specific occurrence of Simuliidae in Tocantins have been registered, as well as anthropophilic species and / or vectors of Onchocerca volvulus. Mansonella ozzardi of vector species were not collected in the study area. It is expected that the prevalence is higher in the rainy months of the year. In areas where there was a lake formation there was loss of habitats. Black-flies can fly long distances in search of food or oviposition sites and that fact, coupled with deforestation may lead to the dispersal of species. There is a report on the occurrence of an autochthonous case of onchocerciasis in Paranã and Minaçu, municipality of Goiás and boarding area of the studied sites. This study is relevant to knowledge of biodiversity and bioecological aspects of Simuliidae in Brazil.
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10

Flook, Paul Kenneth. "Studies of genomic variation in Simulium damnosum s.l. (Diptera: Simuliidae) with special reference to the bioko form of the S.squamosum subcomplex." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316659.

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Books on the topic "Simulium (Diptera: Simuliidae)"

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Smith, Miranda Lyn. Molecular systematics of the Nearctic black fly subgenus Simulium s.s. (Diptera: Simuliidae: Simulium s.l.). Ottawa: National Library of Canada, 2002.

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El género Simulium Latreille en la región neotropical: Análisis de los grupos supraespecíficos, especies que los integran y distribución geográfica (Simuliidae, Diptera). Belém: Ministério da Ciência e Tecnologia, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Museu Paraense Emílio Goeldi, 1987.

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Wilson, Michael David. Morphological and molecular methods for the identification of adult female simulium damnosum species complex (diptera: simuliidae) vectors of onchocerciasis. Salford: University of Salford, 1994.

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Hunter, Fiona F. A cytotaxonomic study of species in the "simulium vernum" group (Diptera: simuliidae). 1987.

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O'Grady, Gail Ellen. Fine structures of the compound eye of "Simulium vittatum" Zetterstedt (Diptera : Simuliidae). 1986.

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Eymann, Markus. The behaviours of the blackfly larvae simulium vittatum and S. Decorum (Diptera: Simuliidae) associated with establishing and maintaining dispersion patterns on natural and artificial substrate. 1985.

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Book chapters on the topic "Simulium (Diptera: Simuliidae)"

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Berry, Colin, Jason M. Meyer, Marjorie A. Hoy, John B. Heppner, William Tinzaara, Clifford S. Gold, Clifford S. Gold, et al. "Black Flies Attacking Livestock: Simulium arcticum Malloch and Simulium luggeri Nicholson & Mickel (Diptera: Simuliidae)." In Encyclopedia of Entomology, 528–29. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_362.

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Kurtak, Dan, Hugo Jamnback, Rolf Meyer, Michael Ocran, and Pierre Renaud. "Evaluation of larvicides for the control of simulium damnosum s.l. (diptera: simuliidae) in west africa." In Trente ans de lutte contre l’onchocercose en Afrique de l’Ouest. Traitements larvicides et protection de l’environnement, 108–17. IRD Éditions, 2003. http://dx.doi.org/10.4000/books.irdeditions.28629.

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Boakye, D. A., R. J. Post, F. W. Mosha, D. P. Surtees, and R. H. A. Baker. "Cytotaxonomic revision of the Simulium sanctipauli subcomplex (Diptera: Simuliidae) in Guinea and the adjacent countries including descriptions of two new species." In Trente ans de lutte contre l’onchocercose en Afrique de l’Ouest. Traitements larvicides et protection de l’environnement. IRD Éditions, 2003. http://dx.doi.org/10.4000/books.irdeditions.28746.

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Adler, Peter H., and John W. McCreadie. "Chapitre 13. Les Simulies (Diptera : Simuliidae)." In Entomologie médicale et vétérinaire, 321–43. IRD Éditions, 2017. http://dx.doi.org/10.4000/books.irdeditions.22052.

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Conference papers on the topic "Simulium (Diptera: Simuliidae)"

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Fedorova, O. A. "TO THE FAUNA OF MIDGES (DIPTERA: SIMULIIDAE) AND BITING MIDGES (DIPTERA: CERATOPOGONIDAE) YAMALO-NENETS AUTONOMOUS DISTRICT." In V International Scientific Conference CONCEPTUAL AND APPLIED ASPECTS OF INVERTEBRATE SCIENTIFIC RESEARCH AND BIOLOGICAL EDUCATION. Tomsk State University Press, 2020. http://dx.doi.org/10.17223/978-5-94621-931-0-2020-40.

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On the territory of the Yamal-Nenets Autonomous District, the study of midges and biting midges was carried out during the exploration of new oil and gas deposits in the second half of the 20th century. Currently, the study of the spread of midges and biting midges is relevant, since they are carriers of a number of infectious and invasive diseases of animals and humans. The fauna of blood-sucking diptera insects of the Yamal-Nenets Autonomous Okrug is represented by 116 species. The faunal list of blood-sucking midges of the region is represented by 24 species, including 1 – Simulium paramorsitans, biting midges by 33 species, including 1 species –Culicoides punctatus. This species was first indicated both for the tundra zone and for the region. Today the topic is relevant and requires further research.
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Vasiliev, Alexandr, and Tatiana Sulesco. "The first pilot study of black fly (Diptera: Simuliidae) breeding sites in Moldova." In International symposium ”Functional ecology of animals” dedicated to the 70th anniversary from the birth of academician Ion Toderas. Institute of Zoology, Republic of Moldova, 2019. http://dx.doi.org/10.53937/9789975315975.66.

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The data on black fly fauna in Moldova are absent in the old and modern literature. Overall, 45 black fly species from the genera Prosimulium (four species) and Simulium (41 species) are common both for Romania and Ukraine and expected to be present in Moldova. For the first time cross-sectional entomological survey was conducted in 2018 to detect the breeding sites of Simuliidae in Moldova. Productive breeding sites of black flies were identified in the creek close to the Dniester River section located in Vascauti village, Racovat River sections located in Branzeni and Burlanesti villages. Immature stages of black flies also have been found in the small creeks in Chisinau and Duruitoarea Veche.
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