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Search Results: 1 - 10 of 756575 matches for " Navarro-Silva Mário A "
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Physiological age and longevity of Anopheles (Kerteszia) cruzii Dyar Knab (Diptera: Culicidae) in the Atlantic Forest of Southern Brazil
Dalla Bona, Ana C;Navarro-Silva, Mário A;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000200021
Abstract: we analyzed the reproductive status, ovarian development, daily survival rate, and length of the gonotrophic cycle in females of anopheles ( kerteszia ) cruzii dyar & knab, to determine how these factors influence the risk of malaria transmission in the coastal region of the state of paraná, southern brazil. in the palmito state forest, paranaguá, females were captured at dawn and dusk by aspiration, bimonthly from december 2006 through march 2007. a total of 2,268 females were captured, of which 454 were dissected. of these, 48% were parous, 50% not reproductive, 73% in christopher and mer stages i and ii, 23% in stages iii to v, 55% nulliparous, 14% uniparous, and 11% had blood in their midgut. daily survival was 0.24 ± 0.03 overall, 0.51 ± 0.04 for females captured at dusk, and 0.25 ± 0.03 for those captured at dawn. the davidson equation for calculation of the gonotrophic cycle was inadequate for an. cruzii populations. females captured at dusk had a higher survival rate than those from dawn, which means that more females of the dusk population enter the parasite extrinsic cycle. the continuous activity and abundance of a. cruzii in the palmito state forest suggests that the conditions are very favorable for its development, with a potential for participation in the protozoan's transmission cycle.
Development, longevity, gonotrophic cycle and oviposition of Aedes albopictus Skuse (Diptera: Culicidae) under cyclic temperatures
L?wenberg Neto, Peter;Navarro-Silva, Mário A.;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000100006
Abstract: the effects of cyclic temperatures on aedes albopictus skuse development, longevity, gonotrophic cycle and the number of oviposited eggs were assessed by means of laboratory experiments. the experiments were carried out with mosquitoes from registro, s?o paulo, brazil, kept in insectary for two years. the development of the insect was followed from egg to adult emergence under 25/18oc and 27/20oc and adult stage under 27/20oc, both associated with ld 12:12h. the eggs received two treatments: (a) maintenance of water volume; (b) periodical and complete change of water. blood meal was offered daily and it was interrupted after haematophagy and restarted after first oviposition. the immature development was significantly different under the temperature regimes (p < 0.05) and the increased temperatures positively affected the development speed. the combination of higher temperatures regime and periodical and complete change of water increased the eggs viability and shortened the incubation time. adult longevity was not different between males and females and the mortality was regular through the time. comparing the mosquito longevity under constant and cyclic temperatures, it is suggested that the lowest temperature of the cyclic regime is a limiting factor for mosquito survival. this fact may limit the a. albopictus distribution range to areas where the minimal temperatures are not much bellow 20oc.
Diversidade de Culicidae durante os períodos crepusculares em bioma de Floresta Atlantica e paridade de Anopheles cruzii (Diptera: Culicidae)
Bona, Ana C. D.;Navarro-Silva, Mário A.;
Revista Brasileira de Zoologia , 2008, DOI: 10.1590/S0101-81752008000100007
Abstract: the aim of this investigation was to know the diversity and abundance of culicidae associating with the climatic factors and obtaining the parity of anopheles cruzii dyar & knab, 1908. the study was developed in a dense rain forest in atlantic forest, located in the state of the paraná, named of palmito state park. the captures were performed two days in a month, during december 2006 to march 2007, occurring in the matutine and vespertine crepuscular periods. the captures were executed before twilight until after twilight. twenty five species that belong to culicidae were identified, the tree most abundant species were anopheles cruzii (65.2%), culex sachettae sirivanakarn & jacob, 1982 (11.2%) e anopheles bellator dyar & knab, 1906 (8.5%). according to variance analysis, significant difference in frequency, was detected between crepuscular periods, for the following species: aedes scapularis (rondone, 1848) (p = 0. 03651), coquillettidia chrysonotum (peryassu, 1922) (p = 0. 00795), mansonia fonsecai (pinto, 1932) (p = 0. 00804), e runchomyia theobaldi lane & cerqueira, 1934 (p = 0. 01996). the tree most captured species didn't show a significant correlation to the climatic factors. the rate parity of anopheles cruzii was 48%. didn't have correlation between the abundance with the rate parity. the twilight influences the behavior of culicidae species. the similarity comparison between matutine and vespertine crepuscular periods revealed an elevated resemblance in the specific composition. a. cruzii was dominant specie in the crepuscular periods. the diversity in the crepuscular periods was considered decrease.
Paridade de Anopheles cruzii em Floresta Ombrófila Densa no Sul do Brasil
Bona,Ana Caroline Dalla; Navarro-Silva,Mário A;
Revista de Saúde Pública , 2006, DOI: 10.1590/S0034-89102006000700023
Abstract: objective: to determine the parity and ovarian development of anopheles cruzii species during the seasons. methods: collections were carried out fortnightly in the morning in the palmito state park in the municipality of paranaguá, southern brazil, between april 2004 and april 2005. adult mosquitoes were captured using human landing rate. dissections were performed using detinova's and polovodova's methods and follicular development was assessed following christophers and mer's criteria. results: a total of 208 specimens of anopheles cruzii were dissected. most females dissected were nulliparous in the seasons; 14.4% of them were found to be nulliparous above christophers and mer's stage ii, which shows previous blood meal prior to the first oviposition. it was observed that anopheles cruzii populations comprised young mosquitoes, probably due to high mortality among parous females. conclusions: the likely gonotrophic discordance is epidemiologically relevant because female mosquitoes can search for more than one host to complete the maturation of their eggs.
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures
Vinicius S. Richardi,Débora Rebechi,José M. R. Aranha,Mário A. Navarro-Silva
Zoologia (Curitiba) , 2013,
Abstract: Determining the age composition of a population is important when conducting ecological, taxonomic and environmental assessments. Morphometric measurements of the head capsule, especially the length and width, are widely used in the identification of insect instars, but alternative ways for determining the age of insects can expand the options for the analysis of field and laboratory populations. This study evaluated the morphometry of the antennae, mandibles, mentum and ventromental plates to discriminate among the four larval instars of Chironomus sancticaroli Strixino & Strixino, 1981. The larvae were reared in the laboratory under constant temperature (25°C) and photoperiod of 12/12 hours for 19 days, with a supply of food. Fifteen larvae were removed randomly every day, cleared in KOH, and slide-mounted, and had the antennae, mandibles, mentum and ventromental plates measured. The dimensions of the four structures studied allowed us to statistically distinguish each of the four larval instars. The data fit an exponential equation according to the Brooks-Dyar rule, which allows an estimate of the larval instar of specimens collected in the field, even when development takes place under different conditions. The duration of each instar was also obtained from our data, and showed an overlap of instars during development.
Primeiro registro de Aedes albopictus no Estado de Santa Catarina, Brasil
L?wenberg-Neto,Peter; Navarro-Silva,Mário A;
Revista de Saúde Pública , 2002, DOI: 10.1590/S0034-89102002000200019
Abstract: three adult females of aedes (stegomyia) albopictus (skuse) were captured using a human bait in the surrounding dwelling area of the remaining rain forest in itaguassu beach, island of s?o francisco do sul, northern coast of the state of santa catarina, brazil.
Primeiro registro de Aedes albopictus no Estado de Santa Catarina, Brasil
L?wenberg-Neto Peter,Navarro-Silva Mário A
Revista de Saúde Pública , 2002,
Abstract: Três fêmeas adultas de Aedes (Stegomyia) albopictus (Skuse) foram capturadas por meio de isca humana em área peridomiciliar de remanescente de Mata Atlantica na Praia de Itagua u, Ilha de S o Francisco do Sul, litoral Norte de Santa Catarina.
Crepuscular activity of culicids (Diptera, Culicidae) in the peridomicile and in the remaining riparian forest in Tibagi river, State of Paraná, Brazil
Müller, Gerson A.;Bona, Ana C. Dalla;Marcondes, Carlos B.;Navarro-Silva, Mário A.;
Revista Brasileira de Entomologia , 2012, DOI: 10.1590/S0085-56262012005000006
Abstract: crepuscular activity of culicids (diptera, culicidae) in the peridomicile and in the remaining riparian forest in tibagi river, state of paraná, brazil. human-attracted mosquitoes were collected for one hour, around sunset time (half hour before and half after), from april to december 2006, in two environments (riparian forest and near houses), in tibagi river basin, palmeira municipality, state of paraná. seven-hundred forty-nine mosquitoes, belonging to 13 species, were collected. psorophora champerico dyar & knab, 1906 (42.86%) and psorophora discrucians (walker, 1856) (40.59%) were the most frequent species. no significant differences between quantities of ps. champerico (t = -0.792; d.f. = 16; p = 0.43) and ps. discrucians (t = 0.689; d.f. = 16; p = 0.49) obtained in riparian forest and near houses were observed, indicating similar conditions for crepuscular activity of these species in both environments. psorophora champerico and ps. discrucians responded (haematophagic activity) to environmental stimuli associated with the twilight hours differently in distinct habitats studied. the former species is registered for the first time in the atlantic forest biome.
Exigências térmicas de Aedes (Stegomyia) albopictus Skuse, 1894 (Diptera, Culicidae) em condi??es de laboratório
Calado, Daniéla C.;Navarro-Silva, Mário Antonio;
Revista Brasileira de Entomologia , 2002, DOI: 10.1590/S0085-56262002000400009
Abstract: thermal requirements of aedes (stegomyia) albopictus skuse, 1894 (diptera, culicidae) under laboratory conditions. allochtonous species of ae. albopictus in the american continent can be found in fourteen brazilian states - about fifteen years had been elapsed since the first report of the presence of this species in brazilian territory. considering its potential epidemiological importance and its adaptation to several habitats, it was determined, for this species, the threshold temperature and the thermal constant for egg, larval and pupal stages under laboratory conditions under four constant temperatures and 12:12 hours light-dark photoperiod. the threshold temperature for the egg phase and for the first instar were quite similar: 9.07 oc (k=214.46 degree days) and 9.23 oc (k= 36.64 degree days), respectively. for 2nd, 3rd and 4th instar, the basal-temperature was higher, oscilating between 12.26 oc and 13.95 oc. the threshold temperature for the complete larval stage and for the pupal stage were 12.03 oc (k= 99.48 degree days) and 11.87 oc (k=32.40 degree days) for males and 11.95 oc (k=110.11 degree days) and 11.60 oc (k=35.30 degree days) for females, respectively.
Preferência por hospedeiro e estratifica??o de Culicidae (Diptera) em área de remanescente florestal do Parque Regional do Igua?u, Curitiba, Paraná, Brasil
Tissot, Ana Cristina;Navarro-Silva, Mário Antonio;
Revista Brasileira de Zoologia , 2004, DOI: 10.1590/S0101-81752004000400023
Abstract: parks and plazas (green areas or vegetation islands) within urban areas can provide conditions for the development of populations of mosquitoes, many species of which are very adaptable to a variety of environments. the species of mosquitoes in the family culicidae with animal hosts, in a vegetation island within an urban area, in curitiba, in the state of paraná, in southern brazil was investigated. to examine whether these green areas contribute to urban populations, mosquitoes were collected five times each season (spring, summer and fall), from september 2000 to july 2001. cdc-m traps were set at two heights (1.5 m and 6 m). a mammal (quinea pig, cavia porcellus linnaeus, 1758, rodentia, cavidae) and bird (nothura maculosa (temminck, 1815), tinamiformes, tinamidae) were used as bait. traps were active from 16:00 to 20:00 h, with samples taken every 30 minutes. a total of 1,415 individual mosquitoes were collected, in 9 genera and 11 species, with 44% of the individuals taken in spring samples, 40% in summer and 16% in fall samples. the 1.5 m traps with mammal bait captured the most mosquitoes (41%), with the 6m trap with bird bait being second (30%), followed by 1.5 m and bird bait (19%) and 6m and mammal bait (10%). mansonia (mansonia) fonsecai (pinto, 1932) and mansonia (mansonia) pessoai (barreto e coutinho, 1944) was the most common species found with both baits. other species captured were: mansonia (mansonia) wilsoni (barreto & coutinho, 1944); mansonia (mansonia) titillans (walker, 1848); culex (culex) acharistus root, 1927; culex (culex) sp.; wyomyia (phoniomyia) quasilongirostris theobald, 1907; ochlerotatus (ochlerotatus) scapularis (rondani, 1848); psorophora (janthinosoma) ferox (humboldt, 1819); culex (melanoconion) sp.; coquillettidia (rhynchotaenia) venezuelensis (theobald, 1912); aedeomyia (aedeomyia) squamipennis (lynch arribálzaga, 1878); ochlerotatus (ochlerotatus) serratus (theobald, 1901); limatus durhami theobald, 1901 and aedes (stegomyia)
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