1,720,999 research outputs found
New records of two species of Toxotrypana (Diptera: Tephritidae) in Argentina
Full text linkEn este estudio se dan a conocer nuevos registros y se extiende la distribución
geográfica de Toxotrypana australis Blanchard y T. nigra Blanchard en la Argentina.In this study are disclosed new records that extend the geographical distribution of
Toxotrypana australis Blanchard and T. nigra Blanchard, in Argentina.Fil: Bertolaccini, Isabel.
Universidad Nacional del LitoralFil: Castro, Damian.
Universidad Nacional del LitoralFil: Curis, María Cecilia.
Universidad Nacional del LitoralFil: Zucchi, Roberto A..
Escola Superior de Agricultura
Luiz de Queiroz (Sao Paulo, Brasil). Departamento de Entomologia e Acarologi
Distribution of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae)
No full textEuxestophaga Gallardo, a new genus of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) and Euxestophaga argentinensis Gallardo, sp. n. from Argentina, are described and illustrated.Fil: Bertolaccini, Isabel. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Cátedra de Zoología Agrícola; Argentina.Fil: Curis, Cecilia. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Cátedra de Zoología Agrícola; Argentina.Fil: Gallardo, Fabiana Edith. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Provincia de Buenos Aires. Comisión de Investigaciones Científicas; Argentina.Fil: Reche, Vanina Anadina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Cátedra de Zoología Agrícola; ArgentinaFil: Zarate, Brenda. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; ArgentinaFacultad de Ciencias Naturales y Muse
The effect of diet in adult stages of Spodoptera cosmioides (Lepidoptera: noctuidae) on fertility, fecundity and adult longevity.
Full text linkLa aparición de cultivares de soja Bt + RR2Y determinó la emergencia de una nueva plaga, Spodoptera cosmioides, una plaga altamente polífaga de amplia distribución. La cría de insectos en cámaras de cría es necesaria para estudios de investigación básica y aplicada. El objetivo del trabajo fue evaluar el efecto de tres dietas ricas en carbohidratos (solución de miel, de jarabe de glucosa y de jarabe de maíz) en la alimentación de los adultos y determinar su efecto sobre la fecundidad, fertilidad y supervivencia de S. cosmioides. Se determinó que, si bien no se hallaron diferencias entre los tratamientos, la composición de los azúcares de las dietas, puede afectar los parámetros reproductivos de esta plaga, ya que las hembras alimentadas con solución de miel natural, más rica en compuestos orgánicos, aumentaron la fecundidad, reflejado en una mayor puesta y eclosión de huevos y la longevidad de los adultos.The occurrence of the Bt + RR2Y soybean cultivars determined the appearance of a new pest, Spodoptera cosmioides, a highly polyphagous, widely distributed pest. Insect breeding in chambers is necessary for basic and applied research. The aim of the work was to evaluate the effect of three diets rich in carbohydrates (honey solution, glucose syrup and corn syrup) in the diet of adults and to determine their effect on fertility, fecundity and survival of S. cosmioides. It was determined that, although no differences were found between the treatments, the composition of the diets sugars can affect the reproductive parameters of this pest, since the females fed with solution of natural honey, rich in organic compounds, increased fertility, reflected in greater egg laying and hatching and longevity of adults.Fil: Curis, Maria Cecilia. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Bertolaccini, Isabel. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Lutz, Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; 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
Diversity of carabids (order: coleoptera) and spiders (class: arachnida) in bt and conventional corn crops in the center of the province of Santa Fé, Argentina
Full text linkEl objetivo de este estudio fue cuantificar y comparar la diversidad de artrópodos benéficos de suelo de Coleopteros carabidae y del Orden Araneae, en cultivos de maíces Bt y convencionales. Anualmente se sembraron dos lotes de 1 ha, uno con maíz Bt y otro con maíz convencional, en la localidad de Pujato Norte, departamento Las Colonias, Santa Fe, Argentina, durante cinco campañas agrícolas (2005-2010). Para la captura de los artrópodos se utilizaron trampas de caída Pitfall, a razón de cuatro por lote. Los recuentos fueron semanales, desde la siembra hasta la cosecha. Se estimaron los siguientes índices ecológicos: abundancia relativa, diversidad de especies, equidad de Shannon, y se calculó el índice de Bray y Curtis para comparar las poblaciones de los dos cultivos. Las comparaciones se evaluaron mediante test no paramétrico de Mann-Whitney para datos apareados. No se hallaron diferencias en la diversidad ni en la abundancia de las especies de Carabidae y Araneae, ni en otras familias de artrópodos benéficos de suelo.The objective of this study was to quantify and compare the diversity of beneficial soil arthropods of Coleopteros carabidae and of the Araneae order, in conventional and Bt corn crops. Two plots of 1 ha were planted annually, one with Bt corn and another with conventional corn, in the town of Pujato Norte, department Las Colonias, Santa Fe, Argentina, between 2005 and 2010. Pitfall traps were used to capture arthropods at a capture rate of four per batch. Counts were conducted on weekly basis from sowing to harvest. The following ecological indices were estimated: relative abundance, species diversity and Shannon equity, while the Bray and Curtis index was calculated to compare the populations of the two crops. The comparisons were evaluated by a non-parametric Mann-Whitney test for paired data. No differences were found in the diversity or abundance of the Carabidae and Araneae species, or in other families of beneficial soil arthropods.Fil: Curis, Maria Cecilia. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Bertolaccini, Isabel. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Lutz, Alejandra. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Trod, María Amalia. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentin
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
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