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Identification and functional analysis of olfactory receptor family reveal unusual characteristics of the olfactory system in the migratory locust

Wang, Zhifeng; Yang, Pengcheng; Chen, Dafeng; Jiang, Feng; Li, Yan; Wang, Xianhui; Kang, Le
Fonte: Springer Basel Publicador: Springer Basel
Tipo: Artigo de Revista Científica
EN
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Locusts represent the excellent model of insect olfaction because the animals are equipped with an unusual olfactory system and display remarkable density-dependent olfactory plasticity. However, information regarding receptor molecules involved in the olfactory perception of locusts is very limited. On the basis of genome sequence and antennal transcriptome of the migratory locust, we conduct the identification and functional analysis of two olfactory receptor families: odorant receptors (ORs) and ionotropic receptors (IRs). In the migratory locust, there is an expansion of OR family (142 ORs) while distinctly lower number of IR genes (32 IRs) compared to the repertoires of other insects. The number of the locust OR genes is much less than that of glomeruli in antennal lobe, challenging the general principle of the “one glomerulus-one receptor” observed in other insects. Most OR genes are found in tandem arrays, forming two large lineage-specific subfamilies in the phylogenetic tree. The “divergent IR” subfamily displays a significant contraction, and most of the IRs belong to the “antennal IR” subfamily in the locust. Most ORs/IRs have olfactory-specific expression while some broadly- or internal-expressed members are also found. Differing from holometabolous insects...

Climate and Tick Seasonality Are Predictors of Borrelia burgdorferi Genotype Distribution▿ †

Gatewood, Anne G.; Liebman, Kelly A.; Vourc'h, Gwenaël; Bunikis, Jonas; Hamer, Sarah A.; Cortinas, Roberto; Melton, Forrest; Cislo, Paul; Kitron, Uriel; Tsao, Jean; Barbour, Alan G.; Fish, Durland; Diuk-Wasser, Maria A.
Fonte: American Society for Microbiology (ASM) Publicador: American Society for Microbiology (ASM)
Tipo: Artigo de Revista Científica
EN
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The blacklegged tick, Ixodes scapularis, is of significant public health importance as a vector of Borrelia burgdorferi, the agent of Lyme borreliosis. The timing of seasonal activity of each immature I. scapularis life stage relative to the next is critical for the maintenance of B. burgdorferi because larvae must feed after an infected nymph to efficiently acquire the infection from reservoir hosts. Recent studies have shown that some strains of B. burgdorferi do not persist in the primary reservoir host for more than a few weeks, thereby shortening the window of opportunity between nymphal and larval feeding that sustains their enzootic maintenance. We tested the hypothesis that climate is predictive of geographic variation in the seasonal activity of I. scapularis, which in turn differentially influences the distribution of B. burgdorferi genotypes within the geographic range of I. scapularis. We analyzed the relationships between climate, seasonal activity of I. scapularis, and B. burgdorferi genotype frequency in 30 geographically diverse sites in the northeastern and midwestern United States. We found that the magnitude of the difference between summer and winter daily temperature maximums was positively correlated with the degree of seasonal synchrony of the two immature stages of I. scapularis. Genotyping revealed an enrichment of 16S-23S rRNA intergenic spacer restriction fragment length polymorphism sequence type 1 strains relative to others at sites with lower seasonal synchrony. We conclude that climate-associated variability in the timing of I. scapularis host seeking contributes to geographic heterogeneities in the frequencies of B. burgdorferi genotypes...

Reemergence of the bedbug Cimex lectularius in Seoul, Korea

Lee, In-Yong; Ree, Han-Il; An, Song-Jun; Linton, John Alderman; Yong, Tai-Soon
Fonte: The Korean Society for Parasitology Publicador: The Korean Society for Parasitology
Tipo: Artigo de Revista Científica
EN
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A healthy 30-yr-old woman carrying an insect that had been caught in her living room visited the International Clinic at Severance Hospital, Seoul, in December 2007. The insect she brought was identified to be a nymph of a bedbug, Cimex lectularius, and her skin rashes looked typical bedbug's bites. Her apartment was investigated, and a dead body of a bedbug, cast skins, and hatched eggs were found in her rooms and neighbors' rooms in the same building. She was living in that apartment in Seoul for 9 months since she had moved from New Jersey, USA. We assume that the bedbugs were introduced from abroad, since there had been no report on bedbugs in Seoul for more than 2 decades at least. This is a report of a reemergence of the common bedbug, C. lectularius in Seoul, Korea.

A TICK ON THE UPPER EYE-LID (Dermacentor auratus nymph)

Kirwan, E. O'G.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /12/1935 EN
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Aptitud biológica de poblaciones de Bemisia tabaci (Gennadius) Biotipo B (Hemiptera: Aleyrodidae) con diferente susceptibilidad al insecticida thiametoxam

Campuzano-Martínez,Aidee; Rodríguez-Maciel,J Concepcion; Lagunes-Tejeda,Ángel; Llanderal-Cázares,Celina; Terán-Vargas,Antonio P; Vera-Graziano,Jorge; Vaquera-Huerta,Humberto; Silva-Aguayo,Gonzalo
Fonte: Sociedade Entomológica do Brasil Publicador: Sociedade Entomológica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2010 ES
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In two field-collected populations of de Bemisia tabaci (Gennadius) B biotype previously selected with the neonicotinoid insecticide thiamethoxam (NEO-R, NEO-N), and a population susceptible to insecticides (SUSC), the level of response to the insecticide thiametoxam, as well as the life and fertility tables were determined. At LC95, the NEO-R population showed a resistance ratio (RR95) value of 8.8-fold, an intrinsic rate of increase (r m) of 0.72. The fitness of the NEO-R and NEO-N populations in relation to the SUSC was 1.5 and 2.0, respectively. The RR95 value for NEO-N was 1.9-fold; it's r m value was 0.082, while in the SUSC population was 0.041. The developmental time of egg and adult were longer in NEO-R population, while the nymph and pupa lasted longer in the NEO-N and SUSC populations. The developmental time was different in the three NEO-R, NEO-N, and SUSC populations with 19.7 d (315.84 degree days or dd), 15.7 d (250.4 dd) and 18.5 d (296.6 d), respectively. The populations previously selected with thiamethoxam did not reproduce faster than their susceptible counterpart.

Predation as a Mortality Factor in Populations of the Spittlebug, Deois flavopicta Stål (Homoptera: Cercopidae)

SUJII,EDISON R.; GARCIA,MARIA A.; FONTES,ELIANA M.G.; O'NEIL,ROBERT J.
Fonte: Sociedade Entomológica do Brasil Publicador: Sociedade Entomológica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2002 EN
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The spittlebug, Deois flavopicta Stål, is the main pest in cultivated pastures of the "Cerrados" (savanna) in the central region of Brazil. The insect has three discrete generations during the rainy season (September-April) and a synchronized population of diapausing eggs during the dry season (May-August). Experiments in cultivated pastures showed that nonspecific predators were able to affect significantly the mortality rates of diapausing eggs and nymphs of D. flavopicta. Predation was a density independent mortality factor that reduced diapausing eggs by approximately 60% and nymphs by 20% to 47%. The nymph mortality rate due to predation did not differ during the first and the second generations of the year. For the third generation however, the mortality rate was lower, related to a greater degree of nymphal aggregation in spatial refuges. Our direct observations indicate that among the types of predators in pastures, ants potentially make the greatest contribution to mortality, although their impact needs experimental verification. High rates of mortality of eggs and nymphs of D. flavopicta exposed to predators indicate that predation can be an important factor determining the size of adult populations. Therefore, management practices that disturb the predator community may increase the population densities of the spittlebug.

Nymphal development, lipid content, growth and weight gain of Nezara viridula (L.) (Heteroptera: Pentatomidae) fed on soybean genotypes

Piubelli,Giorla C.; Hoffmann-Campo,Clara B.; Arruda,Iara C. de; Lara,Fernando M.
Fonte: Sociedade Entomológica do Brasil Publicador: Sociedade Entomológica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2003 EN
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The effects of five soybean [Glycine max (L.) Merrill] genotypes ('BR-16', 'IAC-100', PI 227687, PI 229358, PI 274454) on nymphal development, adult weight and lipid content of the stink bug Nezara viridula (L.), were evaluated in the laboratory. When fed on the pods of PI 227687 (resistant) and of 'BR-16' (susceptible) nymph mortalities were respectively 66.2% and 27.5%. Second instar nymphs, maintained since hatching in petri dishes containing PI 274454 and 'BR-16' pods, weighed 1.1 mg and 1.0 mg, respectively; they were heavier than those fed with PI 227687 (0.7 mg) and 'IAC-100' (0.7 mg) pods. Adult fresh weights were 146.9 mg when fed on 'BR-16', 127.0 mg with PI 227687 and 125.5 mg with 'IAC-100'. The later two genotypes also negatively affected stink bug weight gain. Females accumulated less lipid when fed on 'IAC-100' (4.8 mg) and PI 227687 (4.3 mg) than those fed on the other genotypes. By their deleterious effects, PI 227687 is confirmed as an inadequate food to N. viridula and as the most promising genotype for use in soybean breeding programs as sources of resistance to stink bug.

Morphological description of Amblyomma brasiliense Aragão, 1908 (Acari: Ixodidae) larvae and nymphs

Sanches,Gustavo Seron; Bechara,Gervásio Henrique; Camargo-Mathias,Maria I.
Fonte: Colégio Brasileiro de Parasitologia Veterinária Publicador: Colégio Brasileiro de Parasitologia Veterinária
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2009 EN
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The immature stages of Neotropical ticks are poorly known and in many cases have not been described. This work presents a morphological description of Amblyomma brasiliense larvae (F1) and a redescription of nymphs (F1). A. brasiliense is reported as one of the most aggressive ticks to humans in Brazil. Immature ticks obtained from a laboratory colony initiated from adult specimens collected in the Parque Estadual Intervales (24º 18' S and 48º 24' W), São Paulo, Brazil, were analyzed under scanning electron microscope, and also under light and stereoscopic microscopes. A. brasiliense larvae present basis capituli rectangular; short palpi; rounded idiosoma; coxa I with two spurs, the external one being longer than the internal one; and coxae II and III each with one short spur. Nymphs present basis capituli rectangular with a sharp pointed cornua; oval idiosoma with scutum reaching coxa III; coxa I with two evident spurs, the external one being longer than the internal one; coxae II-III each with one short spur; and coxa IV with a very short spur and chitinous tubercles on internal surface of posterior border of idiosoma. These morphological features, in association with chaetotaxy and porotaxy, should make possible the identification of immature Amblyomma ticks.

Induction of insect plant resistance to the spittlebug Mahanarva fimbriolata Stål (Hemiptera: Cercopidae) in sugarcane by silicon application

Korndörfer,AP; Grisoto,E; Vendramim,JD
Fonte: Sociedade Entomológica do Brasil Publicador: Sociedade Entomológica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2011 EN
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Changes in the agroecosystem with the increase of green cane harvesting in Brazil affected the insect populations associated to this crop, and secondary pests like the spittlebug Mahanarva fimbriolata Stål, became much more important. Many studies have demonstrated the active role played by silicon in plant defense against herbivory. The objective of this study was to evaluate the effects of silicon applications on the biology of the spittlebug reared on two resistant (SP79-1011 and SP80-1816) and one susceptible (SP81-3250) sugarcane cultivars. Sugarcane plants were grown under greenhouse conditions and submitted to different treatments: with and without silicon fertilizer in two different soil type (sandy and clay soil). The newly hatched nymphs were transferred to sugarcane roots and placed into boxes with lids, to keep a moistened and dark environment favoring their growth and maintenance of the root system, providing food access to the developing nymphs. After emergence, adult males and females were placed in cages for mating and oviposition. The silicon absorbed and accumulated in the plant caused an increase in nymphal mortality, and depending on the sugarcane cultivar tested this element also provided an increase in the duration of the nymphal stage and a decrease in the longevity of males and females. 'SP79-1011' presented the highest silicon content in leaves...

Age Structure and Feeding of the Neotropical Grasshopper Cornops aquaticum (Bruner) (Orthoptera: Acrididae) on Water Hyacinth.

Franceschini, Maria Celeste; de Wysiecki, Maria Laura; Poi, Alicia Susana G.
Fonte: Entomological Soc Brasil Publicador: Entomological Soc Brasil
Tipo: info:eu-repo/semantics/article; info:ar-repo/semantics/artículo; info:eu-repo/semantics/publishedVersion Formato: application/pdf
ENG
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We aimed to evaluate the variation in the age structure of Cornops aquaticum (Bruner) population and its relation to the host plant biomass and the feeding of the different age classes of this grasshopper on the Water Hyacinth Eichhornia crassipes along two years, in a Paraná River floodplain lake (Chaco, Argentina). Individuals of C. aquaticum were captured with a 70-cm diameter sweep and separated in nymphs A (instars I and II), nymphs B (instars III to VI), adult females and adult males; host plant biomass was sampled using a ring with a 0.30 m2 diameter. Relative daily feeding of C. aquaticum population was calculated by multiplying the number of individuals captured per minute by the daily consumption by individual obtained in each age classes. We found that the age structure and the relative daily feeding of C. aquaticum varied between seasons and years. The highest values of grasshopper abundance, leaf biomass and relative daily feeding of C. aquaticum population were observed in summer 2006. Plant biomass was directly correlated with nymph abundance and not correlated with adult abundance. Plant biomass available as refuge (leaves), food (laminas) and oviposition site (petioles) to C. aquaticum represented up to 62 % of the total plant biomass. The results obtained in C. aquaticum show the importance of considering total plant biomass and plant biomass available for herbivores separately. Our study highlights the need to find an adequate method to estimate density of C. aquaticum and other semi-aquatic grasshoppers in the Paraná River floodplain involving different seasons...

Marie de'Medici series VI, Debarkation at Marseilles, Sea nymph, detail

Fonte: Department of Art History, Rice University Publicador: Department of Art History, Rice University
Tipo: Paintings; Image Formato: 394x295 cm (155.12x116.14 inches); oil on canvas, painting; reformatted digital
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Patterns of Being.

Stuart, Heather Anne
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2014
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Major creative work: 'Patterns of Being' – a verse novel. The major creative work is a narrative in open verse. The fictional narrative was inspired by an interview with Rupert Max Stuart in The Age on August 19, 2002, titled, 'Max Stuart reflects, finds peace'. Rupert Max Stuart is a South Australian Aboriginal man who was imprisoned in the 1950s for the murder and rape of Mary Hattam, a young white girl. The case created controversy around issues of race and capital punishment for many years. 'Patterns of Being' is a fictional narrative about grief and reconciliation. A girl named Dawn is murdered and police accuse a carnival worker named Rufus. The story is told by Annie, who is Dawn's cousin. She recalls her own experiences but also imagines the remembrances of Lilly, Dawn's mother and Aril, a nymph-like girl who moves through dimensions of time and space. The imagery is inspired by the environment of regional South Australia and the narrative shows Annie's psychic evolution. Annie is 'both the agent and the theatre of individuation' (Simondon). 'Patterns of Being' shows how Annie uses the collective voices of her interior to navigate a path through grie; Thesis (Ph.D.) -- University of Adelaide, School of Humanities, 2014

Cissococcus Cockerell (Hemiptera: Coccoidea: Coccidae), a unique gall-inducing soft scale genus on Vitaceae from South Africa, with description of a new species

Hodgson, C.J.; Millar, I.M.; Gullan, Penny J
Fonte: Magnolia Press Publicador: Magnolia Press
Tipo: Artigo de Revista Científica
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The gall-inducing genus Cissococcus Cockerell is revised to include two species. The family placement of Cissococcus has been uncertain, but characters of the first-instar nymph and adult male clearly show that Cissococcus is a soft scale insect (Coccidae

Tragic palimpsests: The reception of Euripides in Ovid's Metamorphoses

Paschalis, Sergios
Fonte: Harvard University Publicador: Harvard University
Tipo: Thesis or Dissertation; text Formato: application/pdf
EN
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The subject of this dissertation is the reception of Euripidean tragedy in Ovid’s Metamorphoses. In Chapter 1 I offer a general survey of the afterlife of Euripidean drama in the major mediating intertexts between Euripides and Ovid, namely Hellenistic poetry, Roman Republican tragedy, and Virgil’s Aeneid, as well as a review of the pervasive presence of the Greek tragedian in the Ovidian corpus. Chapter 2 focuses on the reception of Euripides’ Bacchae in the Metamorphoses. The starting point of my analysis is Ovid’s epic rewriting of the Euripidean play in the Pentheus episode. Next, I argue that Ovid makes use of the allusive technique of “fragmentation”, in the sense that he grafts elements of the Bacchae in the narratives of the Minyads and Orpheus. The final section examines Ovid’s portrayal of Procne, Medea, and Byblis as maenads and their evocation of the Virgilian Bacchants Dido and Amata. In Chapter 3 I begin by investigating Ovid’s intertextual engagement with Euripides’ Medea in the Medea narrative of Book 7, which is read as an epicized “mega-tragedy” encompassing the Colchian’s entire mythical career. In the second part of the chapter I discuss the Roman poet’s reworking of the Euripidean tragedy in other episodes of the Metamorphoses and argue that Procne...

Sea Spider development: How the encysting Anoplodactylus eroticus matures from a buoyant nymph to a grounded adult

Maxmen, Amy
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 05/01/2013
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In order to understand how animals evolved over time, biologists must learn how their body parts form during their development. The following is a detailed description of how one species of sea spider transforms from a hatchling to an 8-legged adult. Pycnogonids, or sea spiders, comprise a primitive lineage of arthropods. As such, they hold potential to reveal insights into arthropod evolution. Recent phylogenetic analyses have supported their position as either basal chelicerates or as a separate, fifth major lineage of extant arthropods. Disagreements concerning pycnogonid relations to other arthropods is partly a product of too few primary observations of pycnogonid anatomy and development. This investigation of post-embryonic development of the pycnogonid Anoplodactylus eroticus employs multiple techniques of anatomical observation, including Nomarski optics, scanning electron microscopy and fluorescence microscopy, in order to thoroughly document the life cycle. After the second post-embryonic stage, larvae of A. eroticus burrow within a hydroid and undergo morphogenesis. Larvae emerge from the hydroid and simultaneously molt into the juvenile stage. Over the course of post-embryonic development there are eight stages preceding the mature adult. All structures...

Comparison of three trap types for adult catching of whitefly Bemisia tabaci and its parasitoid Eretmocerus mundus in tomato greenhouse

Nombela, Gloria; Chu, CC.; Heneberry, T.; Muñiz, M.
Fonte: Conselho Superior de Investigações Científicas Publicador: Conselho Superior de Investigações Científicas
Tipo: Artículo Formato: 207217 bytes; application/pdf
ENG
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The attractiveness of three trap types to Bemisia tabaci (Gennadius) B-biotype (= Bemisia argentifolii Bellows & Perring) and Eretmocerus mundus Mercet adult was compared in two choice experiments in a greenhouse at the Centro de Ciencias Medioambientales, Madrid, Spain.  Yellow sticky cards equipped with light-emitting-diodes (LED-YC) caught more adults per trap per day than yellow sticky card (YC) traps.YC traps caught significantly more B. tabaci and E. mundus adults than plastic cup traps equipped with light-emitting diodes (LED-plastic cup traps).  However, the LED-plastic cup traps caught few E. mundus compared with YC traps.  The results suggest that LED-plastic cup traps are compatible with E. mundus parasites in greenhouses where the parasites are released to reduce B. tabaci nymph population.; Peer reviewed

Preinfestations of tomato plants by whiteflies (Bemisia tabaci) or aphids (Macrosiphum euphorbiae) induce variable resistance or susceptibility responses

Nombela, Gloria; Garzo, E.; Duque, M.; Muñiz, M.
Fonte: Cambridge University Press Publicador: Cambridge University Press
Tipo: Artículo Formato: 109898 bytes
ENG
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In addition to constitutive plant resistance against pests or pathogens, plants can activate protective mechanisms upon contact with an invader or a chemical elicitor. Studies on induced plant resistance to herbivores, especially piercingsucking insects, are less abundant than those devoted to pathogens. Several experiments under controlled conditions have been conducted to demonstrate that infestations by Macrosiphum euphorbiae induce plant resistance to Bemisia tabaci in susceptible tomato plants. After three days of exposure to 20 apterous adult aphids, the plants acquired a transiently induced resistance to B. tabaci when aphid removal occurred one or 18 hours prior to B. tabaci infestation; the effect disappeared when four days passed between aphid and whitefly infestations. The resistance observed was both locally and systemically induced. Other assays were performed to evaluate the effect of preinfestation with ten adults of B. tabaci during 48 h on the tomato responses to two different clones (Sp and Nt) of M. euphorbiae. The numbers of nymph and adult aphids were counted after the same time interval as the pre-reproductive period and 20 (Sp clone) or 22 (Nt clone) days after adult aphid removal. The tomato responses induced by whitefly feeding depend on the aphid clone. For the Sp clone...

Embryonic diapause in the Australian plague locust relative to parental experience of cumulative photophase decline

Deveson, Edward; Woodman, James
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
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The Australian plague locust Chortoicetes terminifera (Walker) exhibits facultative embryonic diapause during autumn. To approximate natural photoperiod changes during late summer and autumn, locust nymphs were reared under different total declines in laboratory photophase (-0.5, -0.75, -1.0, -1.25, -1.5, -1.75, -2. h each lowered in 15. min steps) in a 24. h photoperiod to quantify any effect on the subsequent production of diapause eggs. Induction of diapause eggs was significantly affected by accumulated photoperiod decline experienced by the parental generation throughout all development stages from mid-instar nymph to fledgling adult. The incidence of embryonic diapause ranged from nil at -0.5. h to 86.6% diapause at -2. h. Continued declines in photoperiod for post-teneral locusts (transitioned from -1. h until fledging to -1.75. h) produced a further increase in the proportion of diapause eggs. The results were unaffected by time spent at any given photoperiod, despite a previously indicated maximal inductive photoperiod of 13.5. h being used as the mid-point of all treatments. Implications for the seasonal timing processes of photoperiodism in C. terminifera, which has a high migratory capacity and a latitudinal cline in the timing of diapause egg production across a broad geographic range...

Apiomorpha gullanae sp. n., an unusual new species of gall-inducing scale insect (Hemiptera: Eriococcidae)

Cook, Lynette
Fonte: Blackwell Publishing Ltd Publicador: Blackwell Publishing Ltd
Tipo: Artigo de Revista Científica
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An unusual new species of the gall-inducing scale insect genus Apiomorpha Rübsaamen is described from Queensland. The adult female, its gall, and the first-instar nymph (crawler) are illustrated, and relationships of the new species are estimated using m

Aspectos ecológicos da tripanossomíase americana: X - Dados populacionais das colônias de Panstrongylus megistus e de Triatoma sordida espontaneamente desenvolvidas em ecótopos artificiais; Ecological aspects of South American Trypanosomiasis: X - Populational data on colonies of Panstrogylus megistus and Triatoma sordida spontaneously developed in artificial ecotopes

Forattini, Oswaldo Paulo; Santos, Jair Lício Ferreira; Ferreira, Octávio Alves; Silva, Eduardo Olavo da Rocha e; Rabello, Ernesto Xavier
Fonte: Universidade de São Paulo. Faculdade de Saúde Pública Publicador: Universidade de São Paulo. Faculdade de Saúde Pública
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/09/1977 POR
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São determinados alguns aspectos da dinâmica populacional de Panstrongylus megistus e Triatoma sordida. Foram utilizados os dados obtidos nas colônias espontaneamente desenvolvidas em ecótopos artificiais representados por galinheiros experimentais. Aplicou-se o método de análise de distribuições de insetos em seus vários estádios. Os resultados permitiram confirmar informações anteriores sobre a mobilidade de adultos, determinando o período anual de sua dispersão. Pelo menos para essa região sudeste do Brasil, no nordeste do Estado de São Paulo, essas épocas correspondem ao período de setembro a novembro para P. megistus e de janeiro a março para T. sordida. Foi possível medir a duração média dos estádios, bem como a sobrevivência dentro de cada um e através a passagem para todos eles. Os dados obtidos permitem sua aplicação no controle e na vigilância de infestações domiciliares por esses triatomíneos.; Spontaneous colonizations of Panstrogylus magistus and Triatoma sordida in experimental fowl houses made possible the stage-frequency analysis so as to obtain some populational parameters. So adult mobility, average stage period, daily and stage survival rates were estimated. Annual period of adult dispersal was defined as Steptember-November for P. magistus and January-March for T. sórdita...