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Search Results: 1 - 10 of 12969 matches for " Mello Rubens Pinto "
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Comportamento de dípteros muscóides frente a substratos de oviposi??o, em laboratório, no Rio de Janeiro, RJ, Brasil
d'Almeida, José Mario;Mello, Rubens Pinto de;
Memórias do Instituto Oswaldo Cruz , 1996, DOI: 10.1590/S0074-02761996000100024
Abstract: how adult females of calyptrate diptera recognize the appropriate breeding substrate is a matter of controversy. among holometabolic insects, the feeding opportunities of immature stages are generally determined by the adult female choice of an oviposition site. the ovipositional and larvipositional substrate preference for the synanthropic flies (chrysomya megacephala, c. putoria, phaenicia cuprina: calliphoridae; atherigona orientalis, synthesiomyia nudiseta: muscidae; ravinia belforti, parasarcophaga ruficornis, peckia chrysostoma: sarcophagidae) is presented in this work. the substrate used for testing were the following: bovine minced meat, fish (sardine), bovine liver, shrimp, squid, human faeces and banana. bovine minced meat was the ovipositional and larvipositional substrate preferred by seven species. human faeces were preferred by r. belforti.
Comportamento reprodutivo de fêmeas de Stomoxys calcitrans (L.) (Diptera: Muscidae) criadas isoladamente em laboratório
Mello, Rubens Pinto de;Garcia, Maria Luzia Maués;
Memórias do Instituto Oswaldo Cruz , 1988, DOI: 10.1590/S0074-02761988000300017
Abstract: starting from adults derived of stomoxys calcitrans colony established in the 'esta??o para pesquisas parasitológicas w. o. neitz, universidade federal rural do rio de janeiro", under temperature of 27°c and 70-80% of relative humidity, one female and two males were isolated in individual cages to the observations of some biological parameters formely determined as number of ovipositant female, real number o eggs by female, oviposition periodicity and female longevity. after 4 repetitions with 6 fenales at the first and second, 7 and 8 females at the third and fourth repetitions, respectively, and a total of 27 isolated females, only 10 layed eggs (37.0%); the total number of layed eggs was 2,254 with a mean of 834 eggs by female; the females had a oviposition period that varied from 3 to 17 days it happening as average 10.2 days. the oviposition rhytm changed from 3 to 7 ovipositions, with intervals changing since too little 24 hours until 6 days. the females longevity were about 17 to 38 days.
Contribution to knowledge of the genus Dimecoenia Cresson, 1916: V. On new species from Rio de Janeiro,RJ (Diptera: Ephydridae)
Mello, Rubens Pinto de;Oliveira, Sebasti?o José de;
Memórias do Instituto Oswaldo Cruz , 1992, DOI: 10.1590/S0074-02761992000500028
Abstract: new species of several speciemens of several specimens from rio de janeiro county, caught on the spinosa platensis microalgae breeding in the concret thanks is described.
Lethal effect of a bait for Rhodnius prolixus (Hemiptera: Reduviidae), the vector of Chagas' disease, containing hexachlorocyclohexane (HCH), under laboratory conditions
Lima, Marli Maria;Rey, Luis;Mello, Rubens Pinto de;
Revista do Instituto de Medicina Tropical de S?o Paulo , 1992, DOI: 10.1590/S0036-46651992000400005
Abstract: the lethal effect of a bait containing an aqueous hexachlorocyclohexane (hch) suspension at the concentration of 1g/l and maintained at room temperature was studied in the laboratory over a period of 12 weeks. the suspension was placed in a latex bag hanging inside a 1000-ml beaker tightly covered with nylon netting, and left there with no changes for 85 days. sixteen groups of r. prolixas bugs, consisting on average of 30 specimens each, were successively exposed to the bait and observed at different intervals for one week each. the mortality rate was 100% for all groups, except for the 16th, whose mortality rate was 96.7%. as the groups succeeded one another, mortality started to occur more rapidly and was more marked at the 6- and 24-h intervals. later tests respectively started at 6:00 a.m. and 6:00 p.m. showed that diurnal and nocturnal periodicity in the offer of food had no effect on mortality. first- and 2nd- instar nymphs and adults male were more sensitive and 5th- instar nymphs were more resistant to the active principle of the bait.
Lethality of triatomines (Hemiptera: Reduviiae), vectors of Chagas' disease, feeding on blood baits containing synthetic insecticides, under laboratory conditions
Lima, Marli Maria;Rey, Luis;Mello, Rubens Pinto de;
Revista do Instituto de Medicina Tropical de S?o Paulo , 1991, DOI: 10.1590/S0036-46651991000600002
Abstract: a laboratory study was conducted to test the toxicity of synthetic insecticides added to defibrinated sheep blood kept at room temperature and offered as food to the following triatomine species: triatoma infestans, panstrongylus megistus, triatoma vitticeps, triatoma pseudomaculata, triatoma brasiliensis and rhodnius prolixus. the insecticides used, at a concentration of 1g/l, were: hch, ddt, malathion and trichlorfon, and the lethalithy observed at the end of a 7-day period varied according to the active principle of each. hch was the most effective by the oral route, killing 100% of the insects, except p. megistus (95.7%) and t. pseudomaculata (94.1%). trichlorfon killed the insects at rates ranging from 71.8% (t. vitticeps) to 98% (r. prolixus). malathion was slightly less efficient, killing the insects at rates from 56.8% (t. vitticeps) to 97% (t.brasiliensis). ddt was the least effective, with a killing rate of 10% (t. vitticeps) to 75% (t.brasiliensis). since the tests were performed at room temperature, we suggest that baits of this type should be tried for the control of triatomines in the field.
Ecology of mosquitoes (Diptera: Culicidae) in areas of Serra do Mar State Park, State of S?o Paulo, Brazil. II - Habitat distribution
Guimar?es, Anthony érico;Gentile, Carla;Lopes, Catarina Macedo;Mello, Rubens Pinto de;
Memórias do Instituto Oswaldo Cruz , 2000, DOI: 10.1590/S0074-02762000000100002
Abstract: the mosquito (diptera: culicidae) ecology was studied in areas of serra do mar state park, state of s?o paulo, brazil. systematized biweekly human bait collections were made three times a day, for periods of 2 or 3 h each, in sylvatic and rural areas for 24 consecutive months (january 1991 to december 1992). a total of 24,943 adult mosquitoes belonging to 57 species were collected during 622 collective periods. aedes scapularis, coquillettidia chrysonotum, cq. venezuelensis, wyeomyia dyari, wy. longirostris, wy. theobaldi and wy. palmata were more frequently collected at swampy and at flooded areas. anopheles mediopunctatus, culex nigripalpus, ae. serratus, ae. fulvus, psorophora ferox, ps. albipes and the sabethini in general, were captured almost exclusively in forested areas. an. cruzii, an. oswaldoi and an. fluminensis were captured more frequently in a residence area. however, cx. quinquefasciatus was the only one truly eusynanthropic. an. cruzii and ae. scapularis were captured feeding on blood inside and around the residence, indicating that both species, malaria and arbovirus vectors respectively, may be involved in the transmission of these such diseases in rural areas.
Ecology of mosquitoes (Diptera: Culicidae) in areas of Serra do Mar State Park, State of S?o Paulo, Brazil. I - Monthly frequency and climatic factors
Guimar?es, Anthony érico;Mello, Rubens Pinto de;Lopes, Catarina Macedo;Gentile, Carla;
Memórias do Instituto Oswaldo Cruz , 2000, DOI: 10.1590/S0074-02762000000100001
Abstract: the ecology of mosquitoes were studied (diptera: culicidae) in areas of serra do mar state park, state of s?o paulo, brazil. systematized monthly human bait collections were made three times a day, for periods of 2 or 3 h each, in sylvatic and rural areas for 24 consecutive months (january 1991 to december 1992). a total of 24,943 specimens of adult mosquitoes belonging to 57 species were collected during 622 collective periods. coquillettidia chrysonotum was the most frequent collected mosquito (45.8%) followed by aedes serratus (6.8%), cq. venezuelensis (6.5%), psorophora ferox (5.2) and ps. albipes (3.1%). the monthly averages of temperature and relative humidity were inserted in the ten-year average limits of maximum and minimum of the previous ten-years. rainfall accompanied the curve of the ten-year averages. those climatic factors were influential in the incidence of some species; temperature: anopheles cruzii, an. mediopunctatus, ae. scapularis, ae. fulvus, cq. chrysonotum, cq. venezuelensis, runchomyia reversa, wyeomyia dyari, wy. confusa, wy. shannoni, wy. theobaldi and limatus flavisetosus; relative humidity: ae. serratus, ae. scapularis, cq. venezuelensis and ru. reversa; rainfall: an. cruzii, ae. scapularis, ae. fulvus, cq. venezuelensis ru. reversa, wy. theobaldi and li. flavisetosus.
Classifica??o de fêmeas de Stomoxys calcitrans (L. ) (Diptera: Muscidae), de acordo com a idade fisiológica
Benigno, Raymundo Nonato Moraes;Garcia, Maria Luiza Maués;Mello, Rubens Pinto de;
Memórias do Instituto Oswaldo Cruz , 1989, DOI: 10.1590/S0074-02761989000800016
Abstract: with the purpose of maiking easier the determination of the physiological age of stomosys calcitrans population, a classification based on the oocitary developtment and number of ovipositions was proposed. female were reared under laboratory conditions, in individual cages and maintained in the presence of male for copulation. on the proper time, ovary and oviduct were removed and the stage of development was observed. adult female were classified as: 1-new emerged female, 2 - young nuliparous female, 3 - old nuliparous female, 4 - uniparousfemale, 5 - two or three ovipositions times female, and 6 - multiparous female.
Prevalência de Anofelinos (Diptera: Culicidae) no Crepúsculo Vespertino em áreas da Usina Hidrelétrica de Itaipu, no Município de Guaíra, Estado do Paraná, Brasil
Guimar?es, Anthony érico;Mello, Rubens Pinto de;Lopes, Catarina Macedo;Alencar, Jeronimo;Gentile, Carla;
Memórias do Instituto Oswaldo Cruz , 1997, DOI: 10.1590/S0074-02761997000600004
Abstract: systematic collections of anophelines were conducted from november 1994 to august 1995 from 18:00 to 20:00 hr using shannon traps and human-bait along the lake margin which forms the itaipu hydroelectric reservoir, state of paraná, brazil. species prevalence was studied at 15 min intervals. anopheles albitarsis sensu latu and an. galvaoi, were the most frequently collected mosquitoes. all anopheles species populations peaked between 18:45 and 19:30 hr. the observations illustrate the existence of a haematophagic activity cycle during the early evening hours: exogenous stimulus (the beginning of sunset) ? shannon trap (light attraction) ? human bait (haematophagy) ? rest and digestion ? exogenous stimulus ? shannon trap or surrounding vegetation. the greater abundance of an. albitarsis collected in human-bait and shannon trap suggests it may be a potential malaria vector in the region
Aspectos bion?micos de Squamatoides trivittatus (Diptera, Sarcophagidae) sob condi??es de laboratório
Salviano, Ricardo JB;Mello, Rubens Pinto de;Beck, Lilian CNH;d'Almeida, José Mario;
Memórias do Instituto Oswaldo Cruz , 1996, DOI: 10.1590/S0074-02761996000200024
Abstract: experiments with squamatoides trivitattus were carried out in two different controlled temperatures (16±1°c/50-60% rh and 27±1°c/70-80% rh). the viability of larvae and pupae at 27°c was 89.82% and 92.75% respectively. larvae did not develop at 16°c. larval development lasted for 20±4 hr, 16±8 hr and 60±7 hr for the first, second and third instars, respectively, completing a total of 96±6 hr. the mean pupal period lasted for 15.7±1.6 days. in longevity tables for the adults, life-expectancy for 50% of the colony submitted to 16°c was of 1.78 weeks for males and 2.42 for females. at 27°c a life-expectancy of 1.15 weeks for males and 0.78 week for females was recorded. the average life-spans for males and females at 16°c were 3.5±2.0 and 3.8±2.6 weeks, respectively, and 1.9±1.2 weeks for both sexes. at 27°c, the longevity recorded was of 2.1±1.3 weeks for males and 1.7±1.1 week for females.
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