Consulta: creatorFacets:"Navarro-Silva,Mário A."
Registros recuperados: 9
Data/hora: 05/06/2024 05:23:00

Development, longevity, gonotrophic cycle and oviposition of Aedes albopictus Skuse (Diptera: Culicidae) under cyclic temperatures
Provedor de dados: 82
Autores: Löwenberg Neto,Peter; Navarro-Silva,Mário A.
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, São 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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Biology; Vector; Mosquito.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000100006

Factors that alter the biochemical biomarkers of environmental contamination in Chironomus sancticaroli (Diptera, Chironomidae)
Provedor de dados: 92
Autores: Rebechi-Baggio,Débora; Richardi,Vinicius S.; Vicentini,Maiara; Guiloski,Izonete C.; Assis,Helena C. Silva de; Navarro-Silva,Mário A.
ABSTRACT Changes in physiology of the nervous system and metabolism can be detected through the activity of acetylcholinesterase (AChE), alpha esterase (EST-a) and beta esterase (EST-ß) in chironomids exposed to pollutants. However, to understand the real effect of xenobiotics on organisms, it is important to investigate how certain factors can interfere with enzyme activity. We investigated the effects of different temperatures, food stress and two steps of the enzymatic protocol on the activity of AChE, EST-a and EST-ß in Chironomus sancticaroli. In experiment of thermal stress individuals from the egg stage to the fourth larval instar were exposed to different temperatures (20, 25 and 30 °C). In food stress experiment, larvae were reared until IV instar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Centrifugation; Freezing; Food stress; Thermal stress.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000400341

Low malathion concentrations influence metabolism in Chironomus sancticaroli (Diptera, Chironomidae) in acute and chronic toxicity tests
Provedor de dados: 92
Autores: Rebechi,Débora; Richardi,Vinicius S.; Vicentini,Maiara; Guiloski,Izonete C.; Assis,Helena C. Silva de; Navarro-Silva,Mário A.
Low malathion concentrations influence metabolism in Chironomus sancticaroli (Diptera, Chironomidae) in acute and chronic toxicity tests. Organophosphate compounds are used in agro-systems, and in programs to control pathogen vectors. Because they are continuously applied, organophosphates often reach water sources and may have an impact on aquatic life. The effects of acute and chronic exposure to the organophosphate insecticide malathion on the midge Chironomus sancticaroli are evaluated. To that end, three biochemical biomarkers, acetylcholinesterase (AChE), alpha (EST-α) and beta (EST-β) esterase were used. Acute bioassays with five concentrations of malathion, and chronic bioassays with two concentrations of malathion were carried out. In the acute...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acetylcholinesterase; Bioindicator; Esterases; Organophosphate; Toxicity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000300012

Crepuscular activity of culicids (Diptera, Culicidae) in the peridomicile and in the remaining riparian forest in Tibagi river, State of Paraná, Brazil
Provedor de dados: 92
Autores: Müller,Gerson A.; Bona,Ana C. Dalla; Marcondes,Carlos B.; Navarro-Silva,Mário A.
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 &amp;amp; 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. =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crepuscular activity; Mosquitoes; Psorophora discrucians; Psorophora champerico.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000100018

Insecticide resistance and genetic variability in natural populations of Aedes (Stegomyia) aegypti (Diptera: Culicidae) from Colombia
Provedor de dados: 103
Autores: Aguirre-Obando,Oscar A.; Bona,Ana C. Dalla; Duque L.,Jonny E.; Navarro-Silva,Mário A.
Mosquito control prevails as the most efficient method to protect humans from the dengue virus, despite recent efforts to find a vaccine for this disease. We evaluated insecticide resistance and genetic variability in natural populations of Aedes aegypti (Linnaeus, 1762) from Colombia. This is the first Colombian study examining kdr mutations and population structure. Bioassays with larvae of three mosquito populations (Armenia, Calarcá and Montenegro) were performed according to the World Health Organization (WHO) guidelines, using Temephos. For the analysis of the Val1016Ile mutation and genetic diversity, we sampled recently-emerged adults from four mosquito populations (Armenia, Calarcá, Montenegro and Barcelona). Following the WHO protocol, bioassays...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioassays; Gene flow; Knockdown resistance; Mitochondrial DNA; ND4 gene.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000100014

Genetic profile and molecular resistance of Aedes (Stegomyia) aegypti (Diptera: Culicidae) in Foz do Iguaçu (Brazil), at the border with Argentina and Paraguay
Provedor de dados: 103
Autores: Bona,Ana C. Dalla; Piccoli,Carla F.; Leandro,André de S.; Kafka,Rosinei; Twerdochilib,Adriana L.; Navarro-Silva,Mário A.
The genetic variability of populations of Aedes (Stegomyia) aegypti (Linnaeus, 1762) is often low due to the intense selection pressure caused by chemical control measures. In this study, we evaluated the susceptibility of larvae and adults of this mosquito to chemical insecticides, the frequency of the Val1016IIe mutation, and the genetic variability of the mitochondrial ND4 gene fragment in the urban area of Foz do Iguaçu, Paraná. The populations of A. aegypti in the southern and central regions of the city were resistant to the diagnostic dose of temephos 0.0162 ppm. Additionally, we detected difference in susceptibility in the northern population. The resistance ratios (RR95) were 3.8, 4.1, and 4.6 for the populations in the north, central, and south...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Knockdown resistance; Mitochondrial DNA; Pyrethroids; Temephos.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000600005

Equipment based on high power UV and white light LEDs to collect and observe scorpions (Arachnida: Scorpiones) and other fluorescent organisms
Provedor de dados: 103
Autores: Ramires,Eduardo N.; Peracetta,Luiz F.; Nogas,Cláudio; Navarro-Silva,Mário A.; Paladini,Edson P.
We introduce a new, high quality, low cost and versatile LEDs-based handset device that emits high power UV and white light, which can be used interchangeably. It offers power control and has long battery life. Even though it is optimized to detect and collect scorpions under low light conditions, it can also be used with other groups of fluorescent organisms. The device achieved superior performance in field and laboratory trials when compared with a 12 LEDs low power UV flashlight, and a 46 W black fluorescent light lamp, to locate Tityus serrulatus Lutz &amp;amp; Mello, 1922.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Buthidae; Fluorescence; Invertebrate collecting methods; Pest control.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000400015

Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures
Provedor de dados: 103
Autores: Richardi,Vinicius S.; Rebechi,Débora; Aranha,José M. R.; Navarro-Silva,Mário A.
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 &amp;amp; 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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth rate; Head capsule; Instars; Morphometry.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200011

Diversidade de Culicidae durante os períodos crepusculares em bioma de Floresta Atlântica e paridade de Anopheles cruzii (Diptera: Culicidae)
Provedor de dados: 104
Autores: Bona,Ana C. D.; Navarro-Silva,Mário A.
O objetivo da investigação foi analisar a variação da diversidade e abundância das espécies de Culicidae e sua relação com algumas variáveis ambientais, bem como estimar a taxa de paridade de Anopheles cruzii Dyar &amp;amp; Knab, 1908. O estudo foi desenvolvido em Floresta Ombrófila Densa da Mata Atlântica, localizada no Estado do Paraná, denominada de Floresta Estadual do Palmito. As capturas foram executadas quinzenalmente, de dezembro 2006 a março 2007, com a técnica de "aspiração menor", nos crepúsculos vespertino e matutino, iniciando antes dos crepúsculos e finalizando após os crepúsculos. Foram detectadas 25 espécies, sendo as mais abundantes, Anopheles cruzii (65,2%), Culex sachettae Sirivanakarn &amp;amp; Jacob, 1982 (11,2%) e Anopheles bellator...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Culex sacchettae; Paridade.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000100007