1,720,956 research outputs found
in a subtropical city of Argentina
Full text linkFil: Martín, Mía Elisa. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones Entomologicas de Córdoba; Argentina.Fil: Martín, Mía Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Alonso, Ana Carolina. Universidad Nacional del Nordeste. Instituto de Medicina Regional; Argentina.Fil: Alonso, Ana Carolina. Universidad Nacional de Salta; Argentina.Fil: Alonso, Ana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Faraone, Janinna. Universidad Nacional del Nordeste. Instituto de Medicina Regional; Argentina.Fil: Faraone, Janinna. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Stein, Marina. Universidad Nacional del Nordeste. Instituto de Medicina Regional; Argentina.Fil: Stein, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Estallo, Elizabet Lilia. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones Entomológicas de Córdoba; Argentina.Fil: Estallo, Elizabet Lilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Earth observation environmental features measured through remote sensing and models of vector mosquitoes species Aedes aegypti and Ae. albopictus provide an advancement with regards to dengue risk in urban environments of subtropical areas of Argentina. The authors aim to estimate the effect of landscape coverage and spectral indices (Normalized Difference Vegetation Index [NDVI], Normalized Difference Water Index [NDWI] and Normalized Difference Built-up Index [NDBI]) on the larvae abundance of Ae. aegypti and Ae. albopictus in Eldorado, Misiones, Argentina using remote satellite sensors. Larvae of these species were collected monthly (June 2016 to April 2018), in four environments: tire repair shops, cemeteries, dwellings and an urban natural park. The proportion of landscape coverage (water, urban areas, bare soil, low vegetation and high vegetation) was determined from the supervised classification of Sentinel-2 images and spectral indices, calculated. The authors developed spatial models of both vector species by generalized linear mixed models. The model’s results showed that Ae. aegypti larvae abundance was better modelled by NDVI minimum values, NDBI maximum values and the interaction between them. For Ae. albopictus proportion of bare soil, low vegetation and the interaction between both variables explained better the abundance.info:eu-repo/semantics/acceptedVersionFil: Martín, Mía Elisa. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones Entomologicas de Córdoba; Argentina.Fil: Martín, Mía Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Alonso, Ana Carolina. Universidad Nacional del Nordeste. Instituto de Medicina Regional; Argentina.Fil: Alonso, Ana Carolina. Universidad Nacional de Salta; Argentina.Fil: Alonso, Ana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Faraone, Janinna. Universidad Nacional del Nordeste. Instituto de Medicina Regional; Argentina.Fil: Faraone, Janinna. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Stein, Marina. Universidad Nacional del Nordeste. Instituto de Medicina Regional; Argentina.Fil: Stein, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Estallo, Elizabet Lilia. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones Entomológicas de Córdoba; Argentina.Fil: Estallo, Elizabet Lilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
Patrones de distribución ambiental y estacional de Aedes aegypti y Aedes albopictus (Diptera: culicidae) en la ciudad de El Dorado, Misiones
No full textAedes aegypti (L.) es el principal vector de dengue, fiebre amarilla, Chikungunya y Zika
en América, mientras que Ae. albopictus (Skuse) es el principal vector de Chikungunya
en Europa y de numerosas arbovirosis en Asia, entre ellas dengue. Su rol como vector
en América aún es desconocido; sin embargo, varios estudios han demostrado que
poblaciones de esta especie son capaces de transmitir estos virus también. Con el
objetivo general de contribuir a la bionomía de estas especies de mosquitos en
Argentina, se llevó a cabo este estudio en la Ciudad de Eldorado, Misiones, dónde
ambas especies habitan en simpatría. De forma semanal, durante dos semanas
consecutivas, desde noviembre de 2018 hasta febrero de 2020, se llevaron a cabo
muestreos estacionales en dos tipos de ambientes: urbano y suburbano. En total se
utilizaron 90 puntos de muestreo, 45 en cada ambiente. En cada sitio se colocaron 2
sensores de detección (ovitrampas) de la actividad de las hembras de Aedes spp. para
la colecta de huevos; los dispositivos fueron puestos distanciados por 50 cm para
aumentar la efectividad de colecta. Debido a que no es posible diferenciar los huevos
de ambas especies mediante el uso de estereomicroscopio, los mismos fueron
inundados para su eclosión en laboratorio. Las larvas emergidas fueron criadas hasta el
estadio IV para permitir su identificación. Larvas y/o pupas halladas en las ovitrampas
por eclosión de huevos en campo, fueron colectadas y llevadas al laboratorio para su cría e identificación. Asimismo, de cada punto/sitio de muestreo se inspeccionaron
hábitats presentes en búsqueda de larvas y/o pupas de culícidos. El primer objetivo
específico de esta tesis fue cuantificar las abundancias y la frecuencia de ocurrencia y
co-ocurrencia de Ae. aegypti y Ae. albopictus en ambiente urbano y suburbano de la
ciudad de Eldorado. Los resultados mostraron que ambas especies fueron halladas en
los dos tipos de ambientes estudiados, Ae. aegypti predominó en el ambiente urbano y
Ae. albopictus si bien fue más abundante en el ambiente urbano, predominó en el
suburbano respecto a Ae. aegypti. Se las encontró coexistiendo en todos los hábitats
larvales artificiales estudiados, tanto del ambiente urbano como suburbano. Aedes
albopictus se presentó como única especie habitando en fitotelmata del ambiente
suburbano. Respecto a las larvas nacidas en campo en las mismas ovitrampas, la
mayoría de las larvas provenientes del ambiente urbano fueron de Ae. aegypti, mientras
que Ae. albopictus predominó en las ovitrampas del ambiente suburbano. De las larvas
nacidas en laboratorio provenientes del ambiente suburbano, el 99% fueron de Ae.
albopictus, mientras que de las provenientes del ambiente urbano predominó Ae.
aegypti. El Test de Fisher demostró que las 2 especies se encontraban juntas en mayor
medida que lo esperado por el azar, lo que representó una asociación positiva entre las
mismas. El segundo objetivo fue identificar variables del ambiente que influyen en la
actividad de oviposición, como indicador de la abundancia de Ae. aegypti y Ae.
albopictus. De los 90 puntos estudiados, se encontraron huevos/larvas y/o pupas de
estas especies en 79 puntos. En todo el periodo de muestreo se encontró a Ae. aegypti
solo o coexistiendo en 56 puntos, y a Ae. albopictus en 58. Como resultado de los
análisis estadísticos se vio que la presencia y abundancia de Ae. aegypti se asociaron
positivamente a la densidad poblacional humana y a la vegetación de tipo herbácea y
arbusto y negativamente con la distancia a la casa más próxima desde el punto de
colecta. Asimismo, la presencia de esta especie estuvo asociada positivamente con la
interacción entre la casa más próxima y la densidad poblacional y su abundancia tuvo
una asociación negativa con la presencia de animales. En cuanto a Ae. albopictus, su presencia y abundancia se asociaron negativamente con la distancia a la casa más
próxima. Por último, el tercer objetivo fue estudiar las variaciones estacionales de la
actividad de oviposición de Ae. aegypti y Ae. albopictus y su relación con las variables
climáticas. Los resultados mostraron que ambas especies estuvieron presentes en todo
el período de estudio. Aedes aegypti presentó picos de abundancia en verano 2019,
seguido de las primaveras 2019 y 2018. Aedes albopictus mostró abundancias mayores
en verano 2019 seguido de la primavera 2019, mientras que en el resto de las estaciones
presentó abundancias similares. La mayor cantidad de sitios positivos de Ae. aegypti se
registró en primavera 2018 y verano 2019 y primavera 2019; Ae. albopictus registró un
mayor número de puntos positivos en primavera-verano 2019 y primavera-verano 2020.
Ambas especies se encontraron en abundancias mínimas en el invierno. La relación Ae.
aegypti/Ae. albopictus fue de 4:1 en la mayoría de las estaciones, sin embargo, si
diferenciamos larvas nacidas en campo y nacidas en laboratorio en las diferentes
estaciones, la relación Ae. aegypti/Ae. albopictus en campo fue más alta (9:1) que las
nacidas en laboratorio (fueron variables). Este estudio revela datos de interés sobre la
ecología y la dinámica temporal de las poblaciones de Ae. aegypti y Ae. albopictus en
entornos urbanos y suburbanos, que podrían tener implicancias significativas para la
salud pública, y que son de utilidad para la toma de medidas integradas de control de
patologías como el Dengue, Zika y Chikungunya.Aedes aegypti Linnaeus is the primary vector of dengue, yellow fever, Chikungunya, and
Zika in the Americas. Meanwhile, Ae. albopictus Skuse is the primary vector of
Chikungunya in Europe and numerous arboviruses in Asia, including dengue. Although
its role as a vector in the Americas is still unknown, several studies have demonstrated
that populations of this species are also capable of transmitting these viruses. This study
was conducted in the City of Eldorado, Misiones, to contribute to the bionomics of the
vectors in Argentina where both species cohabit in sympatry in urban and suburban environments. Weekly samplings were carried out over two consecutive weeks, from
November 2018 to February 2020, at 90 sampling points/sites, with 45 in each
environment. At each site, two detection sensors (ovitraps) were placed to collect eggs
from female Aedes spp. As it is not possible to differentiate between the eggs of both
species using a stereomicroscope, they were flooded for hatching in the laboratory. The
emerged larvae were reared to the fourth stage for identification. Larvae and/or pupae
found in the ovitraps due to egg hatching in the field were collected and taken to the
laboratory for rearing and identification. Habitats at each sampling point/site were
inspected for mosquito larvae and/or pupae. The first objective of this thesis was to
quantify the abundances, frequency of occurrence, and co-occurrence of Ae. aegypti
and Ae. albopictus in the urban and suburban environments of Eldorado city. The study
found that both species were present in the two types of environments examined. Ae.
aegypti was more prevalent in the urban environment, while Ae. albopictus, although
more abundant in the urban environment, was more prevalent in the suburban
environment than Ae. aegypti. Both species coexisted in all artificial larval habitats
studied, in both environments. In the suburban environment, Aedes albopictus was the
only species found inhabiting phytotelmata. In the same ovitraps, most of the larvae
hatched in the urban environment were Ae. aegypti, while Ae. albopictus predominated
in the ovitraps in the suburban environment. From the suburban environment, 99% of
the larvae hatched in the laboratory were Ae. albopictus, while Ae. aegypti predominated
from the urban environment. The Fisher test indicated a positive association between
the two species as they were found together more frequently than expected by chance.
The second objective aim was to identify the environmental variables that influence
oviposition activity, which serves as an indicator of the abundance of Ae. aegypti and
Ae. albopictus. Out of the 90 points studied, eggs, larvae, and/or pupae of these species
were found at 79 points. During the sampling period, Ae. aegypti was found alone or
coexisting at 56 points, while Ae. albopictus was found at 58 points. Statistical analyses
revealed a positive association between the presence and abundance of Ae. aegypti and population density, herbaceous and shrub vegetation, and a negative association with
the distance to the nearest house from the collection point. The study also found that the
presence of the species was positively associated with the interaction between the
nearest house and population density, while its abundance had a negative association
with the presence of animals. In the case of Ae. albopictus, its presence and abundance
were negatively associated with the distance to the nearest house. The third objective of
the study investigate the seasonal variations in oviposition activity of Ae. aegypti and Ae.
albopictus and their relationship with climatic variables. Both species were recorded
during the entire study period. Aedes aegypti had abundance peaks in summer 2019,
followed by springs 2019 and 2018. Ae. albopictus exhibited higher abundances in
summer 2019, followed by spring 2019 and similar abundances were observed in the
remaining seasons. The highest number of positive sites for Ae. aegypti was recorded in
spring 2018 and summer 2019, as well as in spring 2019, Ae. albopictus recorded a
higher number of positive points in spring-summer 2019 and spring-summer 2020. Both
species were found in minimal abundances in winter. In most seasons, the ratio of Ae.
aegypti/Ae. albopictus was 4:1. However, when differentiating between larvae hatched
in the field and those hatched in the laboratory during different seasons, the ratio of Ae.
aegypti/Ae. albopictus in the field was higher (9:1) than in the laboratory (which varied).
This study offers insights into the ecology and temporal dynamics of Ae. aegypti and Ae.
albopictus populations in urban and suburban environments. These insights could have
significant implications for public health and are useful for integrated control measures
of diseases such as dengue, Zika, and Chikungunya
Hatching pattern and coexistence of Aedes aegypti and Aedes albopictus (Culicidae) in a subtropical city, Argentina, after three decades of coexistence
No full textAedes aegypti and Aedes albopictus are mosquito vectors of numerous arboviruses of sanitary importance. Presently in Argentina, neither Ae. aegypti nor Ae. albopictus, have displaced the other species in the places where they coexist, since the introduction of the latter in 1998. In this study, we evaluated whether these species coexist at different scales (ovitrap, microhabitat and habitat) in the city of Eldorado, Misiones province, northeast Argentina. We also analyzed the seasonal variation and climate variables related to the delay in egg hatching of both species. Mosquitoes were collected weekly, from June 2017 to May 2018, using ovitraps placed in urban areas. We conclude that Ae. aegypti and Ae. albopictus coexist in the study area, at the ovitrap, microhabitat and habitat scales. Furthermore, no pronounced pattern of delayed hatching has been observed for either species; however, eggs of Ae. albopictus laid during colder weeks and less rainfall needed a greater number of immersions to hatch, while for Ae. aegypti those laid during weeks with low rainfall and high temperatures showed the longest delay in hatching response.Fil: Faraone, Janinna. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Universidad Nacional del Nordeste. Instituto de Medicina Regional. Área de Entomología; ArgentinaFil: Fischer, Sylvia Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Aponte, Carla Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Formosa. Facultad de Cs.de la Salud. Laboratorio de Investigación En Alimentos; ArgentinaFil: Etchepare, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina. Universidad Tecnologica Nacional. Facultad Regional de Concordia. Departamento de Básicas.; ArgentinaFil: Stechina, Ornela Sofia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Formosa. Facultad de Cs.de la Salud. Laboratorio de Investigación En Alimentos; Argentina. Universidad Nacional del Nordeste. Instituto de Medicina Regional. Área de Entomología; ArgentinaFil: Stein, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Universidad Nacional del Nordeste. Instituto de Medicina Regional. Área de Entomología; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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