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Search Results: 1 - 10 of 6507 matches for " Yenny SOTO-MORA "
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Evaluación del estado de conservación de cuatro especies de aves de la familia Rhinocryptidae en un área silvestre protegida en el Sur de Chile
SOTO-MORA, Yenny;URRUTIA, Jonathan;
Acta zoológica mexicana , 2010,
Abstract: in chile, the richness of endemic birds has been threatened by destruction processes of their natural habitats. due to this being evaluated the conservation status of four species belonging to the rhinocryptidae. this family is characteristic of the temperate forests of south america, an it is in a protected forest area. the evaluation was made using the method proposed by reca et al. (1994), which use the sumin index consisting of 12 variables. the results indicate that eugralla paradoxa (ochre-flanked tapaculo) presents maximum priority (pm) to be preserved, scelorchilus rubecula (chucao tapaculo) deserves special attention (ae) of conservation, while pteroptochos tarnii (black throated huet huet) and scytalopus magellanicus (andean tapaculo) species would not preserve priority (np). after this, it is necessary to implement a specific protective measurements for this family, given that its habitat shows signs of antropogenic processes, which may translate into a declining of their populations.
EVALUACIóN DEL ESTADO DE CONSERVACIóN DE CUATRO ESPECIES DE AVES DE LA FAMILIA RHINOCRYPTIDAE EN UN áREA SILVESTRE PROTEGIDA EN EL SUR DE CHILE
Yenny SOTO-MORA,Jonathan URRUTIA
Acta zoológica mexicana , 2010,
Abstract: La riqueza de avifauna endémica de Chile está siendo amenazada por procesos de destrucción de sus hábitats naturales. Debido a ello se evalúa el estado de conservación de cuatro especies pertenecientes a la Familia Rhinocryptidae, característica de los bosques templados de Sudamérica, presentes en un área silvestre protegida. Para ello se utilizó el Método propuesto por Reca et al. (1994), quienes emplean el índice SUMIN, compuesto por valores de 12 variables. Los resultados obtenidos se alan que Eugralla paradoxa (churrín de la Mocha) presenta Prioridad Máxima (PM) de ser conservada, Scelorchilus rubecula (chucao) merece una Atención Especial (AE) de conservación, en cambio Pteroptochos tarnii (hued hued del sur) y Scytalopus magellanicus (churrín del sur) serían especies No Prioritarias de conservar (NP). De la aplicación de este método, se deduce que es necesario implementar medidas de protección concretas para esta familia, ya que su hábitat presenta indicios de intervención antrópica, lo que se puede traducir en una disminución de sus poblaciones.
La agricultura comercial de los distritos de riego en México y su impacto en el desarrollo agrícola
Consuelo Soto Mora
Investigaciones geográficas , 2003,
Abstract: En este trabajo se efectúa un análisis de las condiciones en que se realiza la agricultura comercial de los principales distritos de riego, y del desarrollo que la agricultura ha experimentado en los últimos decenios a consecuencia de la penetración del capitalismo extranjero. Un resultado de este hecho es el cambio en la estructura social del agro mexicano, así como el crecimiento explosivo de numerosas ciudades que se asientan dentro de las áreas beneficiadas con riego o con industrias agropecuarias. Este fenómeno es más patente en el norte de México, sobre todo en la región Noroeste donde destaca el desequilibrio regional e intrarregional presente en el país.
Diarreas asociadas a Shigella con un patrón de resistencia antimicrobiana alto en el cantón de Coto Brus, Costa Rica
Mora-Mora,Minar; Soto,Lisbeth; Salvador,Gonzalo;
Revista Costarricense de Ciencias Médicas , 2003,
Abstract: among 420 diarrheic simples from patients from the san vito hospital, puntarenas, costa rica, were essayed from 2001, january to 2002, january. the percentage of resistance of shigella sp; to eight of the first line antibiotics, was determined. the 65.1 % of the strains were isolated between october and december of 2001. one hundred and forty two of the strains isolated were shigella flexneri and six were shigella sonnei. the 70% of the strains shown resistance to trimethoprim / sulfametoxazole, tetracycline and ampicillin. aii of the strains were susceptibles to gentamicin, cefotaxime and ciprofloxacin. the case studies determined that most of the strains isolated, have an higher resistant rate to the most used antibiotics in treatment against diarrheic illness. for hence, it is important the continual monitoring of the resistance patterns for a subsequentt reatment.
Legítima dispersión de semillas Ugni molinae Turcz. (Myrtaceae), por monito del monte, Dromiciops gliroides
MORA,JUAN PABLO; SOTO-GAMBOA,MAURICIO;
Gayana. Botánica , 2011, DOI: 10.4067/S0717-66432011000200018
Abstract: we investigated if the marsupial dromiciops gliroides (microbiotheriidae) is a legitimate seed disperser of ugni molinae (myrtaceae). we compared the germination rate of defecated and not-defecated seeds. the results show that defecated seeds are viable and show a high germination rate than no-defecated seeds. we conclude that d. gliroides is a legitimate seed disperser of u. molinae, and it may affect their reproductive success. these results are the first evidence of a seed disperser for u. molinae, and also support the proposal that d. gliroides have an important role as a seed disperser in the temperate forest of southern south america.
Legítima dispersión de semillas Ugni molinae Turcz. (Myrtaceae), por monito del monte, Dromiciops gliroides Legitimate seed dispersal Ugni molinae Turcz. (Myrtaceae), by monito del monte, Dromiciops gliroides
JUAN PABLO MORA,MAURICIO SOTO-GAMBOA
Gayana. Botanica , 2011,
Abstract: We investigated if the marsupial Dromiciops gliroides (Microbiotheriidae) is a legitimate seed disperser of Ugni molinae (Myrtaceae). We compared the germination rate of defecated and not-defecated seeds. The results show that defecated seeds are viable and show a high germination rate than no-defecated seeds. We conclude that D. gliroides is a legitimate seed disperser of U. molinae, and it may affect their reproductive success. These results are the first evidence of a seed disperser for U. molinae, and also support the proposal that D. gliroides have an important role as a seed disperser in the temperate forest of southern South America.
Fertilización de almácigos de pejibaye (bactris gasipaes kunth) y algunas relaciones fenológicas
Carlos Arroyo,Jorge Mora,Henry Soto
Agronomía Mesoamericana , 2001,
Abstract: Fertilización de almácigos de pejibaye (Bactris gasi- paes Kunth) y algunas relaciones fenológicas. Se realizó una prueba exploratoria de fertilización en almácigo de pejibaye, con los materiales comúnmente aplicados por los agricultores para promover el desarrollo de las plántulas. Adem ás, se utilizaron dichas plantas para estudiar las correlaciones entre varias de las variables morfológicas. Los resultados de la prueba de fertilización indican que los abonos foliares no fueron efectivos como práctica de cultivo y que los abonos orgánicos utilizados tampoco resultaron efectivos por cuanto no parecían estar debidamente descompuestos. El mejor tratamiento bajo las condiciones en que se realiz ó el experimento fue la aplicación al suelo de fosfato diamónico o DAP, el cual fue notoriamente superior a todos los demás tratamientos. Por otra parte, todos las variables de crecimiento estudiados resultaron altamente correlacionados entre sí: diámetro y peso del tallo, longitud de la lámina y vaina de las hojas, peso de la raíz, peso y número de las hojas y altura de la planta
Estudio cienciométrico de los trabajos de especialización: Facultad de Medicina. Universidad Central de Venezuela
Mora Tovar,María Elizabeth; Navea Soto,Rómulo;
Revista de la Facultad de Medicina , 2008,
Abstract: the tools of metric analysis were applied to the special works of investigation, of the courses of post degree of the medicine faculty universidad central de venezuela, specifically in the areas of obstetrics and gynaecology, paediatrics and puericulture, internal medicine and general surgery. the study allowed to establish the relation between the intellectual production and the propose lines of investigation by each course of post degree and the relevance of citations done in the special works of investigation. also, the analysis allowed to determine which are they the hospital seats and investigation areas that contribute more to the enrichment of medical literature generated at post degree level in the medicine faculty of the universidad central de venezuela. it was managed to determine that the students indeed use the information services of the university. in each one of the areas it was managed to determine the courses that respond to the lines of investigation and new subjects are observed that could generate new line of investigation.
Phagodeterrence by Quassia amara (Simaroubaceae) wood extract fractions on Hypsipyla grandella (Lepidoptera: Pyralidae) larvae
Soto,Francisco; Hilje,Luko; Mora,Gerardo A; Carballo,Manuel;
Revista de Biología Tropical , 2011,
Abstract: in latin america and the caribbean, precious wood species like mahoganies (swietenia spp.) and cedars (cedrela spp.) are seriously injured by the mahogany shootborer, hypsipyla grandella (zeller) (lepidoptera: pyralidae) larva, which bores into the main shoot of trees. in previous experiments focused on searching for a preventive method for managing this pest, a wood extract of bitterwood, quassia amara l. ex blom (simaroubaceae) had been shown to cause phagodeterrence to larvae. therefore, three fractions (water, methanol and diethyl ether) of a wood extract were tested for their phagodeterrence to larvae, by means of laboratory and greenhouse trials. phagodeterrence was assessed by determining their effect on foliage consumption, mortality and signs of damage (number of orifices, sawdust piles, fallen shoots, number of tunnels and tunnel length) caused by larvae on spanish cedar (c. odorata). both the methanol and diethyl ether fractions caused phagodeterrence, by strongly reducing foliage consumption and signs of damage, while not causing larval mortality. the lowest concentration at which phagodeterrence was detected for the methanol fraction corresponded to 0.0625%, which is equivalent to a 1.0% of the bitterwood crude extract. however, results with the diethyl ether fraction were unsatisfactory, as none of the treatments differed from the solvent, possibly because of an adverse effect of the solvent on foliar tissues. phagodeterrent principles from q. amara derivatives may play an important role in dealing with h. grandella if they are complemented with other integrated pest management preventative tactics. rev. biol. trop. 59 (1): 487-499. epub 2011 march 01.
Phagodeterrence by Quassia amara (Simaroubaceae) wood extract fractions on Hypsipyla grandella (Lepidoptera: Pyralidae) larvae
Francisco Soto,Luko Hilje,Gerardo A Mora,Manuel Carballo
Revista de Biología Tropical , 2011,
Abstract: In Latin America and the Caribbean, precious wood species like mahoganies (Swietenia spp.) and cedars (Cedrela spp.) are seriously injured by the mahogany shootborer, Hypsipyla grandella (Zeller) (Lepidoptera: Pyralidae) larva, which bores into the main shoot of trees. In previous experiments focused on searching for a preventive method for managing this pest, a wood extract of bitterwood, Quassia amara L. ex Blom (Simaroubaceae) had been shown to cause phagodeterrence to larvae. Therefore, three fractions (water, methanol and diethyl ether) of a wood extract were tested for their phagodeterrence to larvae, by means of laboratory and greenhouse trials. Phagodeterrence was assessed by determining their effect on foliage consumption, mortality and signs of damage (number of orifices, sawdust piles, fallen shoots, number of tunnels and tunnel length) caused by larvae on Spanish cedar (C. odorata). Both the methanol and diethyl ether fractions caused phagodeterrence, by strongly reducing foliage consumption and signs of damage, while not causing larval mortality. The lowest concentration at which phagodeterrence was detected for the methanol fraction corresponded to 0.0625%, which is equivalent to a 1.0% of the bitterwood crude extract. However, results with the diethyl ether fraction were unsatisfactory, as none of the treatments differed from the solvent, possibly because of an adverse effect of the solvent on foliar tissues. Phagodeterrent principles from Q. amara derivatives may play an important role in dealing with H. grandella if they are complemented with other integrated pest management preventative tactics. Rev. Biol. Trop. 59 (1): 487-499. Epub 2011 March 01. En América Latina y el Caribe, algunas especies que son fuente de maderas preciosas, como las caobas (Swietenia spp.) y cedros (Cedrela spp.), son seriamente da adas por la larva de Hypsipyla grandella, la cual barrena el brote principal de los árboles. En experimentos previos orientados hacia la búsqueda de un método preventivo para manejar esta plaga, un extracto de la madera de hombre grande, Quassia amara (Simaroubaceae), había demostrado causar fagodisuasión a la larva. Por tanto, tres fracciones de un extracto de la madera de dicho árbol (agua, metanol y éter dietílico) fueron evaluadas en cuanto a su efecto fagodisuasivo sobre las larvas, mediante experimentos de laboratorio e invernadero. Dicho efecto se determinó según el consumo de follaje, la mortalidad y los signos de da o (número de orificios, montículos, brotes caídos, número y longitud de túneles) causados por las larvas en ar
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