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Dynamics of the 2006/2007 dengue outbreak in Brazil

COELHO, Giovanini E; BURATTINI, Marcelo Nascimento; TEIXEIRA, Maria da Glória; COUTINHO, Francisco Antonio Bezerra; MASSAD, Eduardo
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
46.07%
We analyzed dengue incidence in the period between October 2006-July 2007 of 146 cities around the country were Larval Index Rapid Assay (LIRA) surveillance was carried out in October 2006. Of these, we chosen 61 cities that had 500 or more cases reported during this period. We calculated the incidence coefficient, the force of infection (») and the basic reproduction number (R0) of dengue in those 61 cities and correlated those variables with the LIRA. We concluded that » and R0 are more associated with the number of cases than LIRA. In addition, the average R0 for the 2006/2007 dengue season was almost as high as that calculated for the 2001/2002 season, the worst in Brazilian history.; CNPq; FAPESP; FMUSP - HC

Efeito da intensidade luminosa no desenvolvimento larval do camarão-da-amazônia, Macrobrachium amazonicum

de Araujo, Mariana Cutolo; Valenti, Wagner Cotroni
Fonte: Inst Pesca Publicador: Inst Pesca
Tipo: Artigo de Revista Científica Formato: 155-164
POR
Relevância na Pesquisa
26.26%
The effects of four light intensities (0; 2.8 +/- 0.9; 5,5 +/- 1,8 e 7,8 +/- 2,5 mu mol s(-1) m(-2), about 136.5 +/- 87.5; 273 +/- 43.8 e 390 +/- 125 lux, respectively) on survival, productivity, weight gain and larval development of Macrobrachium amazonicum were investigated. Four treatments with three replicate tanks were evaluated. Newly hatched larvae were held in black tanks (80.2 +/- 0.6 larvae L(-1)) filled with 50-L-brackish water (salinity of 10), in a recirculating system. Tanks were covered with shadow cloth allowing 35% and 70% light, respectively, to reach light intensities of 2.8 +/- 0.9 and 5.5 +/- 1.8 mu mol s(-1) m(-2) at the water surface. Complete absence of light (0 mu mol s(-1) m(-2)) was obtained covering the tanks with opaque black plastic, and full-light condition used no covering (7.8 +/- 2.5 mu mol s(-1) m(-2)). Observations showed that the survival rate was not affected by light intensity. Productivity and weight gain were higher under 7.8 +/- 2.5 mu mol s(-1) m(-2) light intensity than under 0 and 2.8 +/- 0.9 1 mu mol s(-1) m(-2) intensities (P<0.05). The larval development index was similar among the treatments under the different light intensities. However, from stage VII this index was increased slightly in the treatment under 7.8 +/- 2.5 mu mol s(-1) m(-2) light intensity. In conclusion...

Effect of nitrite on larval development of giant river prawn Macrobrachium rosenbergii

Mallasen, Margarete; Valenti, Wagner Cotroni
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 1292-1298
ENG
Relevância na Pesquisa
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The effects of ambient nitrite concentrations on larval development of giant river prawn Macrobrachium rosenbergii were evaluated. The trials were conducted in two phases: phase 1, larvae from stages I through VIII and phase 2, larvae from stage VIII until post-larvae. In both phases larvae were kept in water with nitrite (NO2-N) concentrations of 0, 2, 4, 8 and 16 mg/L. Oxygen consumption was analyzed for larvae in stage II at nitrite concentrations of 0, 4, and 8 mg/L. Survival, weight gain, larval stage index and metamorphosis rate decreased linearly with increasing ambient nitrite concentration. However, there was no significant difference between larvae subjected to 0 and 2 mg/L NO2-N. In phase 1, there was total mortality at 16 mg/L NO2-N, while in phase 2 larval development stopped at stage X in this treatment. The oxygen consumption in stage II increased significantly at NO2-N concentration from 0 to 4 mg/L, but there was no difference between 4 and 8 mg/L NO2-N. In conclusion, increasing ambient nitrite up to 16 mg/L NO2-N delays larval development, reduces larval growth rate and causes mortality, whereas no significant effect occurs for levels below 2 mg/L NO2-N. However, the establishment of a general safe level of nitrite to M rosenbergii hatchery may be difficult due to the great variability in larvae individual sensitivity. (c) 2006 Elsevier B.V. All rights reserved.

Effects of nitrate concentration on larval development of the giant river prawn, Macrobrachium rosenbergii

Mallasen, Margarete; Valenti, Wagner Cotroni; Ismael, Deborah
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 55-69
ENG
Relevância na Pesquisa
36.15%
The effect of nitrate concentration on giant river prawn, Macrobrachium rosenbergii, larvae was investigated. Survival rate, weight gain, and larval development were evaluated for different concentrations of nitrate in three experiments. The experiments were divided i n to two phases. In the first phase, larvae from stages I through VIII were analysed, while in the second phase larvae from stage VIII through post-larvae metamorphosis were analysed. Oxygen consumption was also determined for zoea I, II, and VIII exposed to 0, 700, and 1,000 mg/L of nitrate-N. No effect was observed for concentrations up to 180 mg/L NO3-N (experiments I and II), and nitrate levels as 1,000 mg/L NO3-N did not affect survival in the first phase of the third experiment. On the other hand, larval stage index (LSI) and weight gain decreased as nitrate-N concentration increased from 0 to 1,000 mg/L. In the second phase, survival and metamorphosis rate decreased as nitrate concentration increased, according to a linear model. The effect of nitrate levels on weight gain followed a curvilinear pattern. Larval respiration decreased in the water where nitrate was added, but only during stage II. The results demonstrated that nitrate presents extremely low toxicity for giant river prawn larvae...

Habitats larvários de Aedes aegypti, vetor da dengue, em cinco áreas de amostragem na região norte do município de Campinas, estado de São Paulo

Ovando José Provatti
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 24/02/2010 PT
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A dengue tem se tornado um importante problema de saúde pública em vários continentes. Nas Américas o Aedes aegypti é o principal vetor da doença em razão de sua elevada competência vetorial e hábito antropofílico. Assim, é fundamental que o sistema de vigilância municipal disponha de indicadores sensíveis para avaliação dos níveis de infestação do vetor. A vigilância entomológica do Ae. aegypti no município de Campinas, SP, é fundamentada no Índice de Breteau (IB), que indica o número de criadouros com larvas em 100 imóveis pesquisados. Os objetivos deste estudo foram caracterizar e quantificar os criadouros de Aedes aegypti, bem como estimar os índices de infestação larvária por esse vetor em áreas com histórico de dengue na região norte do município de Campinas, SP. Foram analisados os dados obtidos nas avaliações de densidade larvárias realizadas pelas equipes de saúde municipais no período de janeiro de 2005 a outubro de 2009, nas áreas de abrangência dos Centros de Saúde S. Mônica, Anchieta, B. Geraldo e S. Marcos. Nessas áreas a amostragem foi realizada em conglomerados de quarteirões, onde foram pesquisados todos os imóveis, excetuando-se aqueles com elevada quantidade de criadouros (pontos de risco)...

Os anofelinos do sub-gênero kerteszia em relação à distribuição das bromeliáceas em comunidades florestais do município de Brusque, Estado de Santa Catarina

Veloso,Henrique P.; Fontana Junior,Pedro; Klein,Roberto M.; Siqueira-Jaccoud,R. J. de
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/1956 PT
Relevância na Pesquisa
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The present work is part of the studies realized under the authority of the National Service of Malaria (Brazil), with the collaboration of scientists of the Oswaldo Cruz Institute, in some forests of the southern part of Brazil.This is the first of a series and its subject is the development of the Anopheles mosquitoes of the kerteszia in water collected in Bromeliaceae leaves. The ecology of Bromeliaceae was studied in a previous work. The botanical material was classified by specialists from several botanical institutions from Europe and the United States of America. The most important ecological relations of the “bromeliad-kerteszia” problem were presented through four indices: 1st Positivity index – Relative frequency of bromeliad with watery forms in the bromeliad examined. 2nd Larval index – Mean number of watery forms in the positive bromeliad. 3rd Ovoposition index – Product of the Positivy index by the Larval index. 4th MK index – Product of the Ovoposition index by the total number of bromeliad, positive or not, in a unity of area (1.000 m²). The capture of flying forms in relation to the relative humidity was also studied. From the several forests of the Brusque region we have selected one community of each type...

Dynamics of the 2006/2007 dengue outbreak in Brazil

Coelho,Giovanini E; Burattini,Marcelo Nascimento; Teixeira,Maria da Glória; Coutinho,Francisco Antonio Bezerra; Massad,Eduardo
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2008 EN
Relevância na Pesquisa
46.07%
We analyzed dengue incidence in the period between October 2006-July 2007 of 146 cities around the country were Larval Index Rapid Assay (LIRA) surveillance was carried out in October 2006. Of these, we chosen 61 cities that had 500 or more cases reported during this period. We calculated the incidence coefficient, the force of infection (») and the basic reproduction number (R0) of dengue in those 61 cities and correlated those variables with the LIRA. We concluded that » and R0 are more associated with the number of cases than LIRA. In addition, the average R0 for the 2006/2007 dengue season was almost as high as that calculated for the 2001/2002 season, the worst in Brazilian history.

Evaluation of the sticky MosquiTRAP™ for detecting Aedes (Stegomyia) aegypti (L.) (Diptera: Culicidae) during the dry season in Belo Horizonte, Minas Gerais, Brazil

Gama,Renata A.; Silva,Eric M.; Silva,Ivoneide M.; Resende,Marcelo C.; Eiras,Álvaro E.
Fonte: Sociedade Entomológica do Brasil Publicador: Sociedade Entomológica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2007 EN
Relevância na Pesquisa
26.39%
MosquiTRAP™ is a sticky trap specifically designed to capture gravid females of Aedes aegypti (L.) and allows the identification of the mosquito in the field during the inspection of the trap. This study aims to compare this sticky trap to larval and ovitrap surveys for field monitoring of A. aegypti during the dry season. The study was conducted from March to June of 2003 in 20 blocks of the district of Itapoã, Belo Horizonte, MG. The traps were monitored every week while the larval survey was conducted on a monthly basis. The larval index: Premise Index (PI) and Breteau Index (BI) had equal values throughout the experiment (1.72 in the first two months and zero in the last two). The container index (CI) during the first two months was 0.09 and 0.1%, respectively and zero in the last two. The Ovitrap Positive Index (OPI) ranged from 16.7 to 76.9%, and the MosquiTRAP Positive Index (MPI) ranged from 0 to 31.5%. The Egg Density Index (EDI) ranged from 26.6 to 82.8, while the Adult Density Index ranged from 0 to 1.6 throughout the experiment. Temperature and rainfall did not affect the Positive and Density Indices, although these environmental variables seemed to have affected the larvae indices. Although the MosquiTRAP caught a low number of Aedes mosquitoes during the study...

Larval Competition Reduces Body Condition in the Female Seed Beetle, Callosobruchus maculatus

Schade, Daynika J.; Vamosi, Steven M.
Fonte: University of Wisconsin Library Publicador: University of Wisconsin Library
Tipo: Artigo de Revista Científica
Publicado em 14/03/2012 EN
Relevância na Pesquisa
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Early body condition may be important for adult behavior and fitness, and is impacted by a number of environmental conditions and biotic interactions. Reduced fecundity of adult females exposed to larval competition may be caused by reduced body condition or shifts in relative body composition, yet these mechanisms have not been well researched. Here, body mass, body size, scaled body mass index, and two body components (water content and lean dry mass) of adult Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae: Bruchinae) females exposed to larval competition or reared alone were examined. Experimental females emerged at significantly smaller body mass and body size than control females. Additionally, scaled body mass index and water content, but not lean dry mass, were significantly reduced in experimental females. To our knowledge, these are the first results that demonstrate a potential mechanism for previously documented direct effects of competition on fecundity in female bruchine beetles.

Sudden weaning of angel fish pterophyllum scalare (Lichtenstein) (Pisces; Cichlidae) larvae from brine shrimp (Artemia sp) nauplii to formulated larval feed

Herath, Sandamali Sakunthala; Atapaththu, Kerthi Sri Senarathna
Fonte: Springer International Publishing AG Publicador: Springer International Publishing AG
Tipo: Artigo de Revista Científica
Publicado em 12/03/2013 EN
Relevância na Pesquisa
26.07%
This study investigated the effects of sudden weaning of angel fish larvae (Pteraphylum scalari) from Artemia nauplii to commercial larval feed. Four days post hatch (DPH) larvae were reared in four different weaning protocols (TR1-TR4) with triplicates in a complete randomize design. Larvae in TR1 and TR4 were exclusively fed Artemia nauplii and dry feed respectively. In TR2 and TR3, larvae were initially fed Artemia nauplii and suddenly wean to formulated feed on 14 DPH and 7 DPH respectively. The experiment was lasted for 28 days. At the end of the experiment, final mean weight (FW), total length (FL), height (FH), Daily Weight Gain (DWG), Specific Growth Rate (SGR), survival and stress index were compared. Significantly highest (P < 0.05) FW, DWG and SGR were observed in TR1 and TR2 while former values of TR3 were not significantly different from TR1. Highest FL observed in TR1 and TR2 while FL of TR2 was statistically similar to that of TR3. The poorest growth was observed in larvae solely fed formulated feed. Survival and the stress index were independent from weaning methods. Although sudden weaning is possible on 7 DPH, larvae showed comparatively higher growth when switch off to formulate feed on 14 DPH.

Mixed Effects of Elevated pCO2 on Fertilisation, Larval and Juvenile Development and Adult Responses in the Mobile Subtidal Scallop Mimachlamys asperrima (Lamarck, 1819)

Scanes, Elliot; Parker, Laura M.; O’Connor, Wayne A.; Ross, Pauline M.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 14/04/2014 EN
Relevância na Pesquisa
26.15%
Ocean acidification is predicted to have severe consequences for calcifying marine organisms especially molluscs. Recent studies, however, have found that molluscs in marine environments with naturally elevated or fluctuating CO2 or with an active, high metabolic rate lifestyle may have a capacity to acclimate and be resilient to exposures of elevated environmental pCO2. The aim of this study was to determine the effects of near future concentrations of elevated pCO2 on the larval and adult stages of the mobile doughboy scallop, Mimachlamys asperrima from a subtidal and stable physio-chemical environment. It was found that fertilisation and the shell length of early larval stages of M. asperrima decreased as pCO2 increased, however, there were less pronounced effects of elevated pCO2 on the shell length of later larval stages, with high pCO2 enhancing growth in some instances. Byssal attachment and condition index of adult M. asperrima decreased with elevated pCO2, while in contrast there was no effect on standard metabolic rate or pHe. The responses of larval and adult M. asperrima to elevated pCO2 measured in this study were more moderate than responses previously reported for intertidal oysters and mussels. Even this more moderate set of responses are still likely to reduce the abundance of M. asperrima and potentially other scallop species in the world’s oceans at predicted future pCO2 levels.

Fast versus Slow Larval Growth in an Invasive Marine Mollusc: Does Paternity Matter?

Le Cam, Sabrina; Pechenik, Jan A.; Cagnon, Mathilde; Viard, Frédérique
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica Formato: text/html
EN
Relevância na Pesquisa
26.18%
Reproductive strategies and parental effects play a major role in shaping early life-history traits. Although polyandry is a common reproductive strategy, its role is still poorly documented in relation to paternal effects. Here, we used as a case study the invasive sessile marine gastropod Crepidula fornicata, a mollusc with polyandry and extreme larval growth variation among sibling larvae. Based on paternity analyses, the relationships between paternal identity and the variations in a major early life-history trait in marine organisms, that is, larval growth, were investigated. Using microsatellite markers, paternities of 437 fast- and slow-growing larvae from 6 broods were reliably assigned to a set of 20 fathers. No particular fathers were found responsible for the specific growth performances of their offspring. However, the range of larval growth rates within a brood was significantly correlated to 1) an index of sire diversity and 2) the degree of larvae relatedness within broods. Multiple paternity could thus play an important role in determining the extent of pelagic larval duration and consequently the range of dispersal distances achieved during larval life. This study also highlighted the usefulness of using indices based on fathers’ relative contribution to the progeny in paternity studies.

Plankton biomass and larval fish abundance prior to and during the El Niño period of 1997–1998 along the central Pacific coast of México

Franco-Gordo, María del Carmen; Godínez Domínguez, Enrique; Filonov, Anatoliy E.; Tereshchenko, Irina E.; Freire, Juan (1966-)
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
SPA
Relevância na Pesquisa
36.22%
The temporal and spatial distributions of zooplankton biomass and larval fish recorded during 27 months (December 1995–December 1998) off the Pacific coast of central México are analyzed. A total of 316 samples were obtained by surface (from 40–68 to 0 m) oblique hauls at 12 sampling sites using a Bongo net. Two well-defined periods were observed: a pre-ENSO period (December 1995–march 1997) and an ENSO event (July 1997–September 1998) characterized by impoverishment of the pelagic habitat. The highest biomass concentrations occurred at coastal stations during the pre-ENSO period. During the El Nin˜o period no spatial patterns were found in coastal waters. The months with highest biomass were those in which the lowest sea surface temperature (SST) occurred (January–May), and this pattern was also observed during the ENSO period. A typical, although attenuated, seasonal environmental pattern with enhanced phytoplankton (diatoms and dinoflagellates) was prevalent during the El Nin˜o event in nearshore waters. During the El Niño period the phytoplankton was mainly small diatoms (microphytoplankton), while dinoflagellates were practically absent. The most parsimonious generalized linear models explaining spatial and temporal distribution of larval fish species included the ENSO index (MEI)...

Análisis espacio-temporal del estado nutricional de larvas de anchoíta Engraulis anchoita. Relación con las características hidrográficas y la disponibilidad de alimento.; Spatio-temporal analysis on nutritional condition of Engraulis anchoita larvae. Its relation with hydrographical features of nursery grounds and food availability

Diaz, Marina Vera
Fonte: Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires Publicador: Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires
Tipo: info:eu-repo/semantics/doctoralThesis; tesis doctoral; info:eu-repo/semantics/publishedVersion Formato: application/pdf
Publicado em //2010 SPA
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26.21%
El estudio de la condición nutricional de las larvas de peces permite evaluar individualmente el estado fisiológico de los ejemplares y detectar así áreas de cría favorables para la supervivencia y el crecimiento larval. En el presente trabajo se emplearon técnicas morfométricas, histológicas y bioquímicas para determinar la condición nutricional de larvas de anchoíta, Engraulis anchoita, recolectadas en el mar. Los resultados obtenidos fueron complementados con los datos oceanográficos y las abundancias de diferentes componentes del plancton, tanto predadores como presas de las larvas de anchoíta. Se ha observado que los factores que determinan la distribución de las larvas de esta especie serían principalmente de naturaleza físico-química. Si bien no se encontraron diferencias significativas entre áreas, la condición nutricional fue algo mejor en las zonas caracterizadas por aguas de mezcla dentro las estructuras frontales presentes en el área de estudio. Por otra parte, la condición nutricional se vería favorecida durante las estaciones del año en las que no se observan altas densidades larvales. Probablemente las condiciones sean propicias para el crecimiento larval durante todo el año y las densidades bajas o intermedias de larvas de peces permitan a las larvas de anchoíta evitar o reducir la competencia intra e interespecífica por el alimento. Por otra parte...

Diet of larval albacore Thunnus alalunga (Bonnaterre, 1788) off Mallorca Island (NW Mediterranean); Dieta de las larvas de Albacora Thunnus Alalunga (Bonnaterre, 1788) en las aguas de Mallorca (Mediterráneo NW)

Alemany, Francesc; Morales-Nin, Beatriz; Catalán, Ignacio Alberto; Morillas, Ana
Fonte: CSIC - Instituto de Ciencias del Mar (ICM) Publicador: CSIC - Instituto de Ciencias del Mar (ICM)
Tipo: Artículo Formato: 981130 bytes; application/pdf
ENG
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26.22%
Publicación online disponible en: http://www.icm.csic.es/scimar/index.php; [EN] These are the first data on the feeding of larval albacore (Thunnus alalunga Bonnaterre, 1788) in the Mediterranean. Specimens were gathered from day-time bongo-hauls conducted over the SW Mallorcan (Balearic Islands) shelf-slope. Ninety eight percent of 101 individuals ranging from 2.65 to 9.4 mm standard length (SL) contained 1 to 15 prey items per gut. Mean number of prey/gut was 3.55 ± 2.19 (SD). A positive correlation was found between larval SL and the number of prey/gut. The analysis of frequency of occurrence (F), numerical frequency (N), weight frequency (W) and the Index of Relative Importance (IRI) showed a dominance of copepodites and nauplii in the smallest size-class. As larvae grew, cladocerans and Calanoida copepodites dominated the diet, and cladocerans and copepodites were important in F, N and W. Piscivory was observed after notochord flexion and was important in terms of W. A positive correlation between mean prey size and both SL and lower jaw length (LJL) was observed. The niche breadth (S) did not vary with LJL, but the raw prey size range did. Larger copepodites, the absence of nauplii and the incorporation of fish larvae and a larger number of cladocerans in the diet accounted for the increase in mean prey size through increased larval size.; [ES] Se ofrecen los primeros datos sobre la dieta de las larvas de albacora (Thunnus alalunga Bonaterre...

Pilumnus reticulatus Stimpson, 1860 (Decapoda: Brachyura: Pilumnidae): a reappraisal of larval characters from laboratory reared material

Spivak, Eduardo D.; Rodríguez, Antonio
Fonte: CSIC - Instituto de Ciencias del Mar (ICM) Publicador: CSIC - Instituto de Ciencias del Mar (ICM)
Tipo: Artículo Formato: 978474 bytes; application/pdf
ENG
Relevância na Pesquisa
36.05%
Publicación online disponible en: http://www.icm.csic.es/scimar/index.php; The pilumnid crab Pilumnus reticulatus Stimpson, 1860 is known to range from the Caribbean Sea to Argentina (Atlantic). It has also been recorded from the Pacific coast of Panama. Larvae of Pilumnus reticulatus from females collected in the mouth of the Rio de la Plata were reared in the laboratory from zoea I to megalopa. A reappraisal of larval characters is made by comparing the results of this present study with the previous descriptions of Montú et al. (1989) and with those from other Pilumnus species: P. dasypodus, P. sayi, P. vespertilio, P. hirtellus, P. kempi, P. scabriusculus and P. minutus.; This paper was funded by the Ministerio de Educación y Ciencia and the Dirección General del Instituto Cooperación Íberoamericana de la Agencia Española de Cooperación Internacional grant to AR and the Universidad de Mar del Plata grant 15/E082 to EDS.; Peer reviewed

Larval development of Cyrtograpsus affinis (Dana) (Decapoda, Brachyura, Varunidae) from Río de la Plata estuary, reared in the laboratory

Cuesta, José A.; Spivak, Eduardo D.
Fonte: CSIC - Instituto de Ciencias del Mar (ICM) Publicador: CSIC - Instituto de Ciencias del Mar (ICM)
Tipo: Artículo Formato: 1452270 bytes; application/pdf
ENG
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36.2%
Publicación online disponible en: http://www.icm.csic.es/scimar/index.php; The complete larval development of the crab Cyrtograpsus affinis (Brachyura, Varunidae) was obtained by culture in the laboratory. Five zoeal stages, the megalopa and the first crab are described and illustrated. Larval development from hatching to first crab took 29 days at 20° C and 35 PSU. The genus Cyrtograpsus only consists of three species. Larval development of C. altimanus and C. angulatus had been described previously. In the present study, morphological larval characters of the three species are compared. Generic larval features are also compared with those of other Varunidae genera.; This paper was written as part of a Spanish- Argentine cooperative programme (Programa de Cooperación Científica con Iberoamérica) between the Instituto de Ciencias Marinas de Andalucía (CSIC) (Spain) and the Universidad de Mar del Plata (Argentina). It was funded by the Ministerio de Educación y Cultura and the Dirección General del Instituto de Cooperación Iberoamericana de la Agencia Española de Cooperación Internacional grant to Antonio Rodríguez and the Universidad de Mar del Plata grant 15/E082 to EDS.; Peer reviewed

Comparative study of the efficiency of larval and ovitraps for the surveillance of dengue and yellow fever vectors; Estudo comparativo de eficácia de larvitrampas e ovitrampas para vigilância de vetores de dengue e febre amarela

Marques, Cristiano Correa de Azevedo; Marques, Gisela Rita de Alvarenga Monteiro; Brito, Marylene de; Santos Neto, Luiz Gonzaga dos; Ishibashi, Vânia de Campos; Gomes, Francisco de Assis
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 01/08/1993 POR
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26.15%
Com a finalidade de aprimorar a vigilância entomológica dos vetores de Dengue e Febre Amarela - Aedes aegypti e Aedes albopictus - no Estado de São Paulo, Brasil, realizou-se estudo comparativo de eficácia de larvitrampas (armadilhas de larvas), e ovitrampas (armadilhas de ovos). A região estudada é infestada somente pelo Aedes albopictus, espécie que conserva hábitos silvestres, mas também coloniza criadouros artificiais. A primeira parte do estudo foi realizada em área periurbana de Tremembé-SP, onde foram comparados três ocos de árvore, 23 ovitrampas e 5 larvitrampas. A segunda parte dos experimentos desenvolveu-se no Município de Lavrinhas-SP, no distrito de Pinheiros, onde 20 ovitrampas foram instaladas (uma por quadra) e 5 larvitrampas foram localizadas em pontos estratégicos (comércios, depósitos e postos). Os resultados obtidos mostraram que a ovitrampa, além da capacidade de positivar-se mesmo em presença de criadouros naturais, possui eficiência superior à larvitrampa. Constatou-se que para avaliação de efeitos da termonebulização as ovitrampas apresentaram uma significativa redução na média de ovos, o que não se verificou em relação ao Índice de Breteau.; A comparative study of the efficiency of ovitraps and larval-traps was undertaken with a view to improving the entomological survey of vectors of Dengue and Yellow Fever - Aedes aegypti and Aedes albopictus - in S. Paulo State...

Gender-related family head schooling and Aedes aegypti larval breeding risk in Southern Mexico

Danis-Lozano,Rogelio; Rodríguez,Mario H; Hernández-Avila,Mauricio
Fonte: Instituto Nacional de Salud Pública Publicador: Instituto Nacional de Salud Pública
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2002 EN
Relevância na Pesquisa
36.29%
Objective. To investigate if family head genre-associated education is related to the risk of domiciliary Aedes aegypti larval breeding in a dengue-endemic village of Southern Mexico. Material and Methods. A family head was considered to have a low education level if he/she had not completed elementary school. To estimate larval breeding risk within each household, a three-category Maya index was constructed using a weighted estimation of controllable and disposable domestic water containers. A socio-economic index was constructed based on household construction characteristics. Results. Low-level education of either family head was associated to higher larval breeding risk. Households with low-educated mothers had more larval breeding containers. These associations persisted after adjusting for household socio-economic level. Conclusions. These results indicate that households with female family heads with low education levels accumulate more containers that favor Ae. aegypti breeding, and that education campaigns for dengue control should be addressed to this part of the population.

Gender-related family head schooling and Aedes aegypti larval breeding risk in Southern Mexico

Danis-Lozano,Rogelio; Rodríguez,Mario H; Hernández-Avila,Mauricio
Fonte: Instituto Nacional de Salud Pública Publicador: Instituto Nacional de Salud Pública
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2002 EN
Relevância na Pesquisa
36.29%
Objective. To investigate if family head genre-associated education is related to the risk of domiciliary Aedes aegypti larval breeding in a dengue-endemic village of Southern Mexico. Material and Methods. A family head was considered to have a low education level if he/she had not completed elementary school. To estimate larval breeding risk within each household, a three-category Maya index was constructed using a weighted estimation of controllable and disposable domestic water containers. A socio-economic index was constructed based on household construction characteristics. Results. Low-level education of either family head was associated to higher larval breeding risk. Households with low-educated mothers had more larval breeding containers. These associations persisted after adjusting for household socio-economic level. Conclusions. These results indicate that households with female family heads with low education levels accumulate more containers that favor Ae. aegypti breeding, and that education campaigns for dengue control should be addressed to this part of the population.