Dissertations / Theses on the topic 'Canarias'
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Medina, López Javier. "Onomástica del español en Canarias: primeras fuentes." Pontificia Universidad Católica del Perú, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/102810.
Full textSuárez, Bosa Miguel. "Economía, sociedad y relaciones laborales en Canarias : una aproximación a la situación de los trabajadores en Gran Canaria, Lanzarote y Fuerteventura /." Las Palmas de Gran Canaria : Universidad de Las Palmas de Gran Canaria, 1995. http://catalogue.bnf.fr/ark:/12148/cb39958569g.
Full textAnaya, Hernández Luis Alberto. "Judeoconversos e inquisición en las Islas Canarias (1402-1605) /." Las Palmas de Gran Canaria : Universidad de Las Palmas de Gran Canaria, Servicio de publ. : Ed. del Cabildo insular de Gran Canaria, 1996. http://catalogue.bnf.fr/ark:/12148/cb36190537z.
Full textHerrera, Lameli Christian. "Caracterización hidrogeoquímica del macizo de Betancuria. Fuerteventura, Archipiélago de Canarias." Doctoral thesis, Universitat Politècnica de Catalunya, 2001. http://hdl.handle.net/10803/6215.
Full textEl sector estudiado se sitúa en la parte central de la Isla y abarca el Macizo de Betancuria y la Depresión Central. A partir de la distribución de las unidades geológicas e hidrogeológicas más importantes se ha dividido en dos dominios principales: un Dominio Occidental, constituido por rocas volcánicas e intrusivas del Complejo Basal (Cretácico Superior - Mioceno Inferior) y un Dominio Oriental, compuesto por lavas del Edificio Gran Tarajal (Mioceno) y por depósitos volcánicos (Pleistoceno-Holoceno) que conforman el Malpaís.
En el Dominio Occidental las aguas subterráneas presentan un aumento de la salinidad con la profundidad. Se diferencia una Unidad Superior, que contiene aguas de menor conductividad eléctrica (2.5-5.5 mS/cm) y temperaturas que varían entre los 18 y los 25 ºC, y una Unidad Inferior, compuesta por aguas de mayor conductividad eléctrica (5.5-24 mS/cm) y temperaturas variables entre los 25 y 30 ºC. Las aguas de la Unidad Superior son del tipo clorurado-sódico con una alcalinidad moderada y bajos contenidos de sulfato y sílice. La concentración de nitrato es variable de un punto a otro, pero en la mayoría de los casos se sospecha una componente antrópica asociada a usos agropecuarios. Las aguas más salinas de la Unidad Inferior son de tipo clorurado-sulfatado-sódico. Los contenidos de sílice son altos y los contenidos de nitrato están ausentes.
La elevada salinidad en las aguas de la Unidad Superior responde principalmente al efecto de la aridez climática y localmente a efectos puntuales de retornos de riego. A partir de la modelación hidrogeoquímica realizada con el programa PHREEQC se deduce que la aridez climática tiene su efecto en una mayor concentración del agua de lluvia como consecuencia de la evaporación. En menor medida existe una aportación debido a la interacción agua-roca que implica una aportación de sodio como consecuencia de la alteración de plagioclasas. No obstante, para las muestras de la Unidad Inferior es necesario considerar otros orígenes para la salinidad. A partir de la interpretación de la relación rCl/rBr, del estudio de los isótopos del agua (18O y deuterio), de las relaciones iónicas y de la modelación hidrogeoquímica se ha deducido una salinidad debido a la mezcla con agua marina. Esta correspondería a agua marina relicta presente en las rocas intrusivas del Complejo Basal. La menor permeabilidad que presentan las unidades intrusivas explicaría la existencia de agua de origen marino por sobre el nivel del mar. Estas aguas también presentan contenidos elevados de sulfatos los cuales tienen un origen distinto, asociado a la disolución de sulfatos de origen ígneo.
Las aguas de menor mineralización reconocidas en el Dominio Oriental son de composición clorurado-sódica, con valores de las relaciones iónicas más próximos a los valores de la precipitación. Los valores de las relaciones iónicas de estas aguas se aproximan más a los valores del agua de lluvia respecto a las aguas de la Unidad Superior, lo que se atribuye a la menor solubilidad de los materiales que componen las lavas del Malpaís.
A partir de la integración del estudio de la piezometría, de la interpretación de los análisis químicos e isotópicos de las aguas, del análisis de perfiles de temperatura y conductividad eléctrica en sondeos y de la interpretación de la distribución de las unidades geológicas en el subsuelo se ha establecido un modelo conceptual de funcionamiento hidrogeológico del acuífero.
The island of Fuerteventura es placed in the eastern limit of the Canarian Archipelago, only 100 km far from the African Continent. It has a relatively smooth topographic relief when compared to the other islands of the Archipelago. This and the closeness to the Sahara coast explain the dominantly arid climate.
The study area is in the central part of the Island and comprises a large part of the Massif of Betancuria and the Central Depression. Following the distribution of the most important geological and hydrogeological Units, the study area has been divided in two main subareas: a western subarea formed by volcanic and intrusive rocks of the Basal Complex (Upper Cretaceous-Lower Miocene) and an eastern subarea formed by lavas of the Gran Tarajal Edifice (Miocene) and volcanic deposits (Pleistocene-Holocene) which form the Malpais (badlands).
In the western subarea groundwaters are characterised by an increasing salinity with depth. Thus, it is possible to differentiate an Upper Unit, containing waters of lower electrical conductivity (2.5 to 5.5 mS/cm) and temperatures between 18 and 25ºC, and a Lower Unit, with groundwaters with a higher electrical conductivity (5.5 to 24 mS/cm) and temperatures between 25 and 30ºC. Groundwaters from the Upper Unit are of the sodium-chloride type with generally a moderate alkalinity and low sulphate and silica contents. Nitrate contents of these waters varies from point to point, but in most cases an anthropic component is suspected, which is associated to farming activities. The more saline groundwaters of the Lower Unit are of the sodium-chloride-sulphate type, except for some one which is more diluted as a consequence of the mixture of waters from the Upper and Lower Units inside the boreholes.
The high salinity of groundwater from the Upper Unit is mainly the result of the island's climatic aridity, and locally to point effects of excess irigation water. From the hydrochemical modelling carried out with the code PHREEQC it is deduced that climatic aridity produces an intense evaporation concentration of rainfall. To a lesser extent there is a contribution due to rock-water interaction, which corresponds mostly to plagioclase weathering. However, the more saline waters in the Lower Unit have to be explained by means of other salinity origins. From the interpretation of the rCl/rBr ratio, the study of water isotopes (180 and deuterium), the most important ionic ratios and chemical modelling, the salinity can be linked to the admixture with sea water. This sea water seem to be relict and it is found in the intrusive rocks of the Basal Complex. The smaller permeability of the intrusive units may explain the presence of seawater above present sea level, as remnants of moments in which the ocean was relatively at a higher elevation. These waters also present high sulphate contents. The sulphate has a different origin, which is associated to the dissolution of sulphates of igneous origin.
Groundwaters of a lower salinity found in the eastern subarea represent recharge water and also have a marked sodium-chloride composition, with ionic ratios which are closer to those of precipitation. Generally the ionic rations of these waters are closer to those of rainfall than the samples from the Upper Unit. This is explained by the faster turnover time and low solubility of the materials of the Malpais recent lavas.
By integrating the piezometric study, the interpretation of water chemical and isotopic analyses, the analysis of temperature and electrical conductivity borehole logs, and the interpretation of underground distribution of geological units, a conceptual model of the aquifer hydrogeological functioning has been established, which explains reasonably well the results commented above.
Poncela, Poncela Roberto. "Hidrogeología del sistema acuífero volcánico de La Palma (Islas Canarias)." Doctoral thesis, Universidad de Alicante, 2015. http://hdl.handle.net/10045/52878.
Full textAlonso, Delgado Víctor Lorenzo. "Deporte, ocio y sociabilidad en las islas Canarias occidentales (1850-1936)." Doctoral thesis, Universitat Ramon Llull, 2015. http://hdl.handle.net/10803/285238.
Full textEste trabajo trata el surgimiento y desarrollo de la sociabilidad deportiva en las Islas Canarias Occidentales en un periodo comprendido entre 1850 y 1936. Es un trabajo que nace desde una perspectiva teórica y metodológica de carácter socio-histórico, atendiendo a una visión más inclusiva y abierta, propia de las ciencias sociales. Lo hace partiendo de varias premisas teórico conceptuales: La reflexividad de los actores sociales y su adscripción a un campo social, propio y específico; el sentido abierto del concepto sociabilidad, yendo más allá del estudio de las asociaciones; la complejidad del fenómeno estudiado, dotado de particularidades y circunscrito a un contexto mediterráneo, más amplio; así como las similitudes mantenidas con las tesis de Guttmann (1977) y Elías y Dunning (1992). De este modo, los capítulos del trabajo atienden a los distintos ámbitos o sentidos de la sociabilidad, mostrando como hacen su aparición y se desenvuelven el ocio, las prácticas físicas y deportivas en cada uno de ellos. Así, la sociabilidad vinculada a contextos recreativo- culturales, regeneracionistas, militares, de cuadros o deportivos, será tratada por separado y en profundidad a lo largo del trabajo. Así, mostramos cómo y en qué momento aparece y se legitima el deporte en cada uno de los contextos estudiados. Cómo convive éste con otras prácticas ya existentes o novedosas. Cómo y en que modo se constituyen las sociedades vinculadas, al modo de espacios de sociabilidad medianamente formales y complejos. En conjunto, muestra cómo a lo largo de la segunda mitad del siglo XIX se va gestando un proceso que comienza a cristalizar en la década de 1890, mediante la constitución de las primeras sociedades deportivas. En adelante, no sólo se incrementará su número, sino que el proceso ganará en complejidad, produciéndose un intercambio de sentidos y visiones alrededor del deporte, distando así de la idea de progreso lineal, comúnmente establecida.
This work treats the emergence and development of the sports sociableness in the Western Canary Islands in a period understood between 1850 and 1936. It is a work that comes from a theoretical and methodological perspective of socio-historical character, based on a view more inclusive and opened, own vision of the social sciences. This work is based on several conceptual theoretical premises: the reflexivity of social actors and assignment to a social field, own and specific; open concept sociability sense, going beyond the study of the associations; the complexity of the phenomenon studied, equipped with special features and localized in a Mediterranean context; as well as similarities with the theses of Guttmann (1977) and Elias and Dunning (1992). Thus, the chapters work serve different areas or ways of sociability, showing how they make their appearance and leisure unfold, physical and sports in each practice. So, the sociableness linked to recreative - cultural contexts, regeneracionist, military, sports teams, will be treated separately and in depth along the work. In this way, we show how and when to appear and sport is legitimized in each of the contexts studied. How it coexists with other existing or new practices. How this one coexists with other already existing or new practices. How and in that way the linked companies are constituted, like moderately formal and complex spaces of sociableness. Overall, it shows how, over the second half of the nineteenth century to germinate a process that begins to crystallize in the 1890s, through the establishment of the first sports clubs. . En adelante, no sólo se incrementará su número, sino que el proceso ganará en complejidad, produciéndose un intercambio de sentidos y visiones alrededor del deporte, distando así de la idea de progreso lineal, comúnmente establecida. In forward, not only their number will increase, but the process will become more complex, resulting in an exchange of meanings and visions about sport and being far from the idea of linear progress, commonly established.
González-Cruz, María-Isabel. "Hispanismos y canarismos en un corpus de textos ingleses sobre Canarias." Pontificia Universidad Católica del Perú, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/103400.
Full textMarrero, Díaz Rayco. "Modelo hidrogeoquímico del acuífero de las cañadas del Teide, Tenerife, Islas Canarias." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6277.
Full textEl objetivo general de esta tesis es la elaboración de un Modelo Hidrogeoquímico del acuífero de Las Cañadas que permita entender la evolución y comportamiento del acuífero, los procesos y condiciones que determinan las características físico-químicas e isotópicas finales de las aguas subterráneas y su interacción con el sistema volcánico-hidrotermal del Teide. Para la elaboración del Modelo Hidrogeoquímico ha sido necesario aplicar diversas metodologías geoquímicas, en las que cada una de las cuales no puede explicar por sí sola el funcionamiento físico y químico del sistema y producir un modelo conceptual, por lo que ha sido necesario la integración de todos los resultados para una mejor interpretación.
Se ha elaborado un modelo físico del acuífero de Las Cañadas que también ha permitido realizar una primera aproximación de la geometría de la zona saturada, aportando nueva información al debate sobre el origen de la Caldera de Las Cañadas. Esta geometría se ha obtenido considerando los diferentes estudios geofísicos y geológicos realizados en años recientes en Las Cañadas, y la información litológica de las galerías, pozos y sondeos de la zona.
Se ha realizado un estudio de las características químicas e isotópicas de la recarga a través del muestreo y análisis del agua de lluvia durante 18 meses a lo largo de un perfil N-S de Tenerife, que atraviesa el acuífero de Las Cañadas desde el nivel del mar hasta la Caldera de Las Cañadas, siendo los datos más completos, hasta la fecha, por su representatividad espacial y temporal.
Debido a la complejidad del acuífero de Las Cañadas y de la cuantiosa información disponible desde el punto de vista hidroquímico, en la presente tesis se optó por no estudiar las variaciones temporales de las características hidrogeoquímicas del mismo, centrándose casi exclusivamente en describir la situación actual y usando principalmente los datos recopilados durante el desarrollo de la tesis en dos campañas de campo realizadas en los años 2004 y 2006. También se ha creado una Base de Datos Hidroquímica de Las Cañadas (BDHLC) que por primera vez integra y unifica gran parte de la información disponible, no sólo de las características físico-químicas e isotópicas de las aguas subterráneas del acuífero de Las Cañadas sino de todo Tenerife.
El estudio de los procesos de interacción agua-roca-gases en el acuífero ha sido el centro de atención en gran parte de la presente tesis a través de estudios geotermométricos, diagramas de estabilidad mineral y de equilibrio químico y un modelado hidrogeoquímico. Los estudios de isótopos estables de oxígeno, hidrógeno y carbono han permitido determinar la principal área de recarga, así como el origen de las aguas subterráneas y del dióxido de carbono (CO2) disuelto en las mismas. Por último, también se ha cuantificado la aportación endógena y atmosférica de CO2 y de cloruros (Cl) a las aguas subterráneas, y se ha realizado un balance de masa de los mismos para el acuífero.
En este trabajo también se ha llevado a cabo un estudio sobre el origen, características y distribución espacial de los gases disueltos en las aguas subterráneas del acuífero de Las Cañadas. Dicho estudio ha permitido comprobar que el control espacial de los mismos puede resultar una herramienta muy útil para la comprensión de la circulación del agua subterránea en dicho acuífero y para identificar las zonas de mayor conexión con el sistema volcánico-hidrotermal del Teide.
Considerando los principales resultados de la geoquímica de las aguas subterráneas y de los gases disueltos en la presente tesis, el modelo propuesto del funcionamiento del sistema es que las aguas subterráneas de la zona de Las Cañadas están recibiendo un aporte directo de CO2 que disminuye el pH y favorece los procesos de interacción agua-roca, aumentando considerablemente su contenido salino, especialmente de Na y HCO3; las aguas antes de llegar a la zona de descarga del Valle de salida de Icod-La Guancha donde son captadas por las galerías y pozos, se alejan de las zonas con aporte de CO2, por lo que rápidamente aumentan su pH debido a procesos de desgasificación y/o consumo de CO2 en las reacciones de interacción agua-roca.
A través de un balance de masas de cloruros en el acuífero se ha podido estimar en la Caldera de Las Cañadas un coeficiente de recarga medio de 0,75 (con una incertidumbre notable, aún no estimada), muy similar al valor de 0,69 obtenido por el Consejo Insular de Aguas de Tenerife en la misma región.
Por último, esta tesis, además de presentar un modelo del funcionamiento del acuífero desde el punto de vista geoquímico, también provee de nuevos y cuantiosos datos para futuros estudios, relacionados directa e indirectamente con la hidrogeología (geotermia, vigilancia volcánica, etc.).
Surficial water resources are absent in Tenerife Island as they are in the other islands of the Canary Islands. For that reason, groundwaters represent more than 90% of the resources for water consumption. Within this picture, the Hydrologic Plan for Tenerife Island of 1996 considers the aquifer within Las Cañadas del Teide caldera as the main reserve of groundwater for the island. In addition, Las Cañadas aquifer has a close interaction with the volcanic-hydrothermal system of Teide volcano, making possible to use its chemical properties as potential "tracers" of the seismic-volcanic activity of the region.
The general objective of this dissertation is to elaborate a Hydrogeochemical Model of Las Cañadas aquifer that explains the evolution and behavior of the aquifer, its processes and the conditions that determine the final physical-chemical and isotopic characteristics of the groundwater, and its interaction with the volcanic-hydrothermal system of Teide volcano. For the elaboration of this model, it was necessary to apply diverse geochemical methodologies. Each one of these methodologies cannot explain by themselves how the physical and chemical work the system to produce a conceptual model. For that reason, an integration of all the studies and results was done in order to get a better interpretation.
The construction of the physical model of Las Cañadas aquifer has allowed the identification of the geometry of the saturated zone, which gives an important contribution to the debate about the origin of the Las Cañadas Caldera. This geometry was obtained throughout the study of the different geophysical and geologic studies at Las Cañadas Caldera that have been carried out in recent years, and the lithologic information of galleries, wells, and boreholes in the region.
The chemical and isotopic characteristics of the water recharge have been studied throughout the sampling and analysis of rainfall during 18 months and along a profile N-S of Tenerife Island. This profile intercepts Las Cañadas from sea level to the North, crosses Las Cañadas Caldera, and then to the southern shore. This data is the most complete to date, due to its spatial and temporal coverage.
Due to the complexity of Las Cañadas aquifer and the amount of information available from the hydrochemical point of view, in this dissertation, the transient variations of the hydrochemical properties of the aquifer are not studied. Instead, this dissertation is centered almost exclusively in describing the present day situation or snapshot of the aquifer. To achieve that, we are using mainly the data collected during the development of this dissertation in two field seasons during 2004 and 2006. A Hydrochemical Data Base for Las Cañadas Aquifer has been created unifying a large proportion of the available information, not only about the physical-chemical and isotopic characteristics of the groundwaters of Las Cañadas but also of the entire Tenerife Island.
A large proportion of this dissertation is centered in studying the water-rock-gas interaction processes using geothermometric studies, mineral stability diagrams, chemical equilibrium, and hydrogeochemical modeling. The stable isotopes of oxygen, hydrogen, and carbon have allowed the identification of the recharge areas as well as the origin of the groundwaters and the dissolved carbon dioxide (CO2). Finally, the endogenic and atmospheric contributions of CO2 and chloride (Cl) to groundwater have been quantified, and mass balance of these components for the aquifer have been made.
The origin, characteristics, and spatial distribution of dissolved gases in the groundwaters of Las Cañadas aquifer have been assessed in this work. This study has shown that the spatial distribution of these gases can be an important tool for the understanding of the circulation of groundwater in this aquifer and for the identification of zones of greater connection with the volcanic-hydrothermal system of Teide volcano.
Taking into account the results of the groundwater geochemistry and the dissolved gases, the proposed model for Las Cañadas aquifer is as follows: 1) the groundwaters within the zone of Las Cañadas is getting a direct input of CO2 that decreases the pH and favors the water-rock interactions, increasing its salinity, especially the concentration of Na and HCO3; 2) the waters leave the high CO2 recharge zone before they reach the discharge zone at the output valley of Icod-La Guancha (where the water is tapped by several galleries), increasing the pH fast due to degasification processes and the consumption of CO2 in water-rock reactions.
Using the chloride mass balance for the aquifer, it has been possible to determine a mean recharge coefficient equal to 0.75 (with a non-determined large uncertainty), similar to the 0.69 value obtained by the Insular Water Council of Tenerife for the same region.
Finally, in addition to present a model for the functioning of the aquifer from the geochemical point of view, this dissertation provides new and many data for future studies that are related directly of indirectly with hydrogeology (geothermics, volcanic monitoring, etc.).
Abregú, Hurtado Ronald Urciso. "Comisionado de Componentes Mecánicos, Eléctricos e Instrumentación del proyecto minero Las Canarias." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/654852.
Full textThe objective of this thesis is to present the planning of the project "Commissioning of Mechanical, Electrical and Instrumentation Components of the Las Canarias Mining Project", including the simulation of one application of change and its impact on the project. The project executed by C-MARA, it includes components Mechanical, Electrical and Instrumentation. The areas of execution of the tests are: crushed, grinding, floating, filters, pebbles and thickeners. In the initiation of the project will develop the description generally of the project. For the definition of scope, the technical specifications included in the contract were important. For the management of the cost of the project is considered the reserve of contingency and the reserve of management. The management of risks is made, on the basis of the definition of the project, with the participation of key stakeholders. The management of the Procurement and Stakeholders, is developed in accordance to the requirements and the experience provided by C-MARA. The Earned Value Management was used for the assessment of the status of the project. The Close of the project put in practice as planned for the transfer to the area of operations of the customer including recompilation of the lessons learned. Finally, it is concluded that the thesis presents an effective and real plan, including the simulation of an important change.
Trabajo de investigación
Sabadell, González Sonia. "Etiología y epidemiología del "Falso Mal de Panamá" de la platanera en Canarias." Doctoral thesis, Universitat Autònoma de Barcelona, 2004. http://hdl.handle.net/10803/3878.
Full textEn la bibliografía aparecen bajo distintos nombres, descripciones de sintomatologías similares al FMP. Así, Stover, (1972) y posteriormente Lahav et al. (1999) realizaron una revisión sobre las primeras descripciones del "Yellow mat" y "Colorado diseases" de los que tampoco se conoce la causa.
La incidencia del FMP se ha visto incrementada en los últimos 5 años, coincidiendo con el registro de temperaturas por debajo de la media normal para estas latitudes en los meses de invierno.
La máxima incidencia de síntomas, coincidió con la proliferación de nuevas plantaciones, utilizando en muchos casos emplazamientos no idóneos para el cultivo de la platanera y sorribas con suelos ricos en arcillas que provocaban un mal drenaje y tendían a la compactación.
Las referencias de la literatura y estas evidencias de campo sugerían que posiblemente nos encontrábamos ante una situación de estrés de la planta provocada por factores abióticos, los cuales potenciarían la acción de determinados microorganismos que pudieran tener un papel en la expresión de los síntomas. Por todo ello, la hipótesis de trabajo para la explicación de los síntomas del "Falso mal de Panamá" es que posiblemente existiera una interacción entre factores abióticos y bióticos.
Para desarrollar esta hipótesis se han realizado los siguientes trabajos. Procesamiento de muestras en el laboratorio para la obtención de una colección de aislados bacterianos y fúngicos asociados a plantas de platanera con FMP obtenidas a partir de muestreos realizados en cultivos tanto del norte como en el sur de la isla de Tenerife. Otra fuente de obtención de muestras fue las que los propios agricultores nos han hecho llegar directamente o a través de los agentes de extensión agraria de todo el archipiélago.
Una vez los aislados fueron identificados y caracterizados, se han desarrollado pruebas de inoculación in vitro y en invernadero sobre plantas sanas, sin haber sido posible reproducir los síntomas de FMP en condiciones controladas.
Por otro lado también se han realizado ensayos en invernadero para determinar el efecto que las características físicas-químicas del suelo pudieran tener sobre la expresión de síntomas, en los que se obtuvieron resultados preliminares que indican que el tipo de suelo por sí mismo no es el responsable del conjunto de síntomas de FMP.
Estos resultados, originaron el planteamiento de la combinación de los factores abióticos de estrés más comunes en las plantaciones afectadas, con una selección de los microorganismos encontrados en asociación a los síntomas, bajo condiciones de invernadero. De este modo, se han podido observar puntos necróticos en los rizomas y amarilleos foliares en las plantas de platanera sometidas a estrés por encharcamiento, compactación y frío ambiental cultivadas en suelos procedentes de plantaciones afectadas o bajo inoculación de especies fúngicas pertenecientes al género Fusarium, aunque en ningún caso se consiguió reproducir los síntomas típicos del FMP.
En este punto del trabajo se planteó un ensayo en condiciones de campo con dosis de riego superiores a la recomendada y con compactación artificial del suelo, en el que se consiguió reproducir los síntomas internos de rizoma y oscurecimiento vascular típicos del FMP, aunque los síntomas aéreos característicos no fueron tan claros.
Complementariamente, se han realizado estudios histoquímicos con el fin de establecer un criterio de diagnostico diferencial con el MP, a partir de lo descrito por Reinking, (1926) para el "Yellow Mat", quien asociaba los síntomas vasculares a una desorganización del floema, que también se ha podido observar en el caso de las muestras estudiadas de FMP, con la aportación de que además el xilema podía encontrarse colapsado por sustancias de diversa naturaleza.
Todos estos resultados sugieren que el FMP es un desorden en cuya causa podrían jugar un papel muy importante algunos factores del suelo como la compactación, el encharcamiento
y la hipoxia y los desequilibrios nutricionales concomitantes, aunque no se puede descartar la interacción de alguna especie fúngica o bacteriana en combinación con otros factores abióticos no estudiados en este trabajo.
False Panama Disease (FPD) was first described by Deacon et al. in 1985, in South Africa, who gave it its name due to the similarity between its symptoms and those of true Panama disease (PD) caused by Fusarium oxysporum f. sp. cubense (FOC). These authors found Fusarium species associated with FPD affected plants, but pathogenicity tests were negative and aetiology could not be established. They concluded that the probable cause was of abiotic originæheavy soils, tending towards compaction and bad drainageæalthough the role of some biotic agent was not excluded.
In the literature there are descriptions of similar symptoms under a variety of different names. Stover (1972) and later Lahav et al. (1999) reviewed the first descriptions of "Yellow Mat" and "Colorado disease", despite which the aetiology of both are still unknown.
In the Canary Islands, FPD incidence has increased over the last five years, coinciding with lower than normal mean winter temperatures in some plantation areas.
Maximum symptom incidence also coincided with significant increase in new plantations. In many instances, these plantations were set up in plots totally unsuitable for banana cultivation, on heavy clay soils with poor drainage and clearly predisposed towards compaction.
Literature reports and local field evidences suggested that we were probably facing a plant stress situation induced by abiotic factors, possibly enhancing or potentiating the action of microorganisms which would play a role in symptoms expression. The hypothesis for the present study is that the symptoms observed can be explained by an interaction of biotic and abiotic factors.
To test this hypothesis, the following work has been done:
Sample processing in the laboratory to obtain bacterial and fungal collections of isolates associated to FPD-affected banana plants from plantations both in the northern and southern coastal areas of Tenerife. Also studied were samples sent to the laboratory by farmers and Extension Service Agents from all the banana producing islands of the Canary archipelago.
Once the isolates were identified and characterized, inoculation trials were carried out both in in vitro cultivation in growth chamber and in glasshouse under controlled conditions. None of the typical FPD symptoms were observed in any of these trials.
Glasshouse trials were also conducted to determine the effects of some soil physical-chemical properties on symptom expression. The results suggested that soil alone cannot explain the appearance of FPD symptoms.
As a consequence of these results, trials combining the commonest stress factors present in the plantations and some selected associated microorganisms were done under controlled glasshouse conditions. Necrotic areas in the rhizome and yellowing of the foliage were observed in plants cultivated on soils from affected plantations and inoculated with Fusarium spp. and subjected to waterlogging and low temperatures. Nevertheless, no typical FPD symptoms were observed at any time.
At this point in the work, a field trial was set up to cultivate plants in soil that had been mechanically compacted and applying various irrigation doses (standard for banana and two larger doses). Typical internal rhizome symptoms were observed in some plants although external symptoms were never observed.
Complementary to the above, in view of and based on the Reinking work done in 1926 on "Yellow Mat"æwherein symptoms were associated with phloem disorganization, biochemical studies were also conducted with the aim of establishing a differential diagnostic with PD. The results showed that in FPD not only is the phloem indeed disorganized but that the xylem might also be collapsed by different type of substances.
All these results suggest that some soil factors, particularly compaction, waterlogging, hypoxia, and the nutritional imbalances consequent upon these factors, may play a causal role in the FPD disorder. Nevertheless, the interaction of some bacterial or fungal species in combination with certain abiotic factors not studied in this work can not be excluded.
Farrujia, de la Rosa Augusto José. "Ab initio : 1342-1969 : análisis historiográfico y arqueológico del primitivo poblamiento de Canarias /." La Laguna : Artemisa ed, 2004. http://catalogue.bnf.fr/ark:/12148/cb40014225j.
Full textPérez, García José Miguel. "La situación política y social en las Canarias orientales durante la etapa isabelina /." Las Palmas : Real sociedad económica de amigos del país, 1989. http://catalogue.bnf.fr/ark:/12148/cb366644298.
Full textSantana, Turégano Manuel Ángel. "Formas de desarollo turístico, redes y situación de empleo. El caso de Maspalomas (Gran Canarias)." Doctoral thesis, Universitat Autònoma de Barcelona, 2003. http://hdl.handle.net/10803/5116.
Full textThe thesis focuses in the relationships betwen the way in wich tourism developps at a certain destiny and the situation of employment in it, through a case study of Maspalomas (Gran Canaria). The study shows the relationships betwen the origins of the capital that builts tourism facilities and the origins of the people employed in the tourism industry, betwen the characteristics of tourists visiting a destiny and the characteristics of the employment produced by tourism developpment, and betwen the position of the resort in the international net providing tourism services and the situation of the employment.Tourism is defined as a certain way to gaze at the land and landscapes, and so tourism developpment could be studied in three different ways: as the characteristics of the spaces that are the objective of the tourist gaze, as the characteristics of the tourists and as the developpment of a number of enterprises giving services to these tourists. The situation of the employment is defined as both the position of employment in society and the posibilities to organize employment. The case of Maspalomas is chosen because of its importance. With over 100.0000 beds in a coast of less than 14 kms, Maspalomas is the biggest touristic resort in the Canary Islands, in Spain, and certainly one of the biggest of the world. Tourism in Maspalomas is lodged mainly in appartements and bungalows, and it is a winter and all year round tourism. Even though these characteristics are not so strange in the Canary Islands, they are quite strange in other european resorts. The touristic- urbanistic developpment of Maspalomas has lasted for more tan thirty years, through a model based in the "on plan sales system". As a consequence of this process, the capital of tourism industry, which is spread into many small investors, is separated from the managment. There is also a strong difference betwen the market structure of demand, an oligopolistic market with only a few transnational touroperator, and a touristic offer provided by a great range of small and medium enterprises. The research results shows a relationship betwen geographical origins of the capital and the workforce, and betwen tourism and employment stability. Finally, the position of the resort in the international net of enterprises providing tourism services seems to have a biggest influence in labour conditions than any other item. And also, for every hotel or touristic business, its position in the local net of businesses giving tourism services seems to be the most determining in labour conditions.
Santana, Turégano Manuel Ángel. "Formas de desarollo turístico, redes y situación de empleo. El caso de Maspalomas (Gran Canaria)." Doctoral thesis, Universitat Autònoma de Barcelona, 2003. http://hdl.handle.net/10803/5116.
Full textSe define al turismo como una manera mercantilizada de relacionarse con el territorio, consistente en la agregación de cinco consumos. Habría tres maneras de entender el desarrollo turístico: como las características de los espacios que son objeto de la mirada turística, como las características de quienes realizan turismo y como desarrollo de un tejido de empresas que proveen a éstos de las actividades que demandan. La situación de empleo se define, tanto como la posición que ocupa el trabajo asalariado en la sociedad como el conjunto de posibilidades que existen para organizarlo.
La elección del caso de Maspalomas obedece a su importancia cuantitativa y cualitativa. Con unas 100.000 plazas alojativas en 14 kilómetros constituye la principal concentración turística de Canarias, de España y una de las mayores del mundo. Su "modelo turístico" se caracteriza por el predominio de la oferta extrahotelera y la importancia del turismo de invierno, rasgos que, si bien se hayan relativamente generalizados en Canarias, constituyen una excepción a nivel mundial.
El desarrollo urbanístico de Maspalomas se ha producido a lo largo de 30 años, basado en el método de "venta sobre planos". La consecuencia del proceso ha sido, además del predominio de la planta alojativa extrahotelera, la distribución de la propiedad de la planta alojativa entre un gran número de pequeños capitalistas locales. En cuanto los turistas que visitan Maspalomas, provienen de los principales mercados emisores de turistas de Europa, y pueden englobarse en tres grandes grupos: turismo de verano, turismo de invierno y turismo gay. Respecto a las características del desarrollo socio- económico de Maspalomas, hay una importante diferencia entre la concentración de la demanda, en unos pocos touroperadores multinacionales, y la existencia de una oferta facilitada por un gran número de pequeñas y medianas empresas, en una situación similar en muchos aspectos a la que se ha estudiado para los "distritos industriales". Por último, la situación de empleo en Maspalomas se caracteriza por la abundancia de empleos, pero de empleos que ofrecen pocas expectativas de promoción. Esto, junto a otros condicionantes, explican que una gran parte de las trayectorias laborales se enfoquen hacia la salida del empleo, es decir, a establecerse por su cuenta o vivir de las rentas del alquiler de apartamentos.
En cuanto a las relaciones entre formas de desarrollo turístico y situación de empleo, parece existir relación entre el origen geográfico del capital invertido en la construcción de la oferta turística y el de los trabajadores/ as que ocupan los empleos que se crean. Parece existir también relación entre las características de los turistas y las de empleo: los tipos de turismo más estables crean un empleo que es también más estable. Por último, la posición de cada localidad en la red internacional de elaboración de servicios turísticos parece ser el factor que más influye en la situación de empleo. Para cada empresa concreta, la posición que ocupa parece influir más en las características de su empleo que otros factores habitualmente utilizados como variable explicativa, como el tamaño.
The thesis focuses in the relationships betwen the way in wich tourism developps at a certain destiny and the situation of employment in it, through a case study of Maspalomas (Gran Canaria). The study shows the relationships betwen the origins of the capital that builts tourism facilities and the origins of the people employed in the tourism industry, betwen the characteristics of tourists visiting a destiny and the characteristics of the employment produced by tourism developpment, and betwen the position of the resort in the international net providing tourism services and the situation of the employment.
Tourism is defined as a certain way to gaze at the land and landscapes, and so tourism developpment could be studied in three different ways: as the characteristics of the spaces that are the objective of the tourist gaze, as the characteristics of the tourists and as the developpment of a number of enterprises giving services to these tourists. The situation of the employment is defined as both the position of employment in society and the posibilities to organize employment.
The case of Maspalomas is chosen because of its importance. With over 100.0000 beds in a coast of less than 14 kms, Maspalomas is the biggest touristic resort in the Canary Islands, in Spain, and certainly one of the biggest of the world. Tourism in Maspalomas is lodged mainly in appartements and bungalows, and it is a winter and all year round tourism. Even though these characteristics are not so strange in the Canary Islands, they are quite strange in other european resorts.
The touristic- urbanistic developpment of Maspalomas has lasted for more tan thirty years, through a model based in the "on plan sales system". As a consequence of this process, the capital of tourism industry, which is spread into many small investors, is separated from the managment. There is also a strong difference betwen the market structure of demand, an oligopolistic market with only a few transnational touroperator, and a touristic offer provided by a great range of small and medium enterprises.
The research results shows a relationship betwen geographical origins of the capital and the workforce, and betwen tourism and employment stability. Finally, the position of the resort in the international net of enterprises providing tourism services seems to have a biggest influence in labour conditions than any other item. And also, for every hotel or touristic business, its position in the local net of businesses giving tourism services seems to be the most determining in labour conditions.
Schnoepf, Markus. "El Proyecto Humboldt : una biblioteca digital para las expediciones científicas a las Islas Canarias." Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2009/3524/.
Full textDas Proyecto Humboldt bietet seit 2002 eine wachsende digitale Bibliothek zur Erforschung der europäischen Forschungsreisen auf die kanarischen Inseln zwischen 1700 und 1900. Die Bibliothek ist vom Open Access Gedanken geleitet und wendet sich an Forscher ebenso wie an die breite Öffentlichkeit. In diesem Text werden einige Resultate der Forschungsarbeit der letzten Jahre vorgestellt. Allgemeine Gedanken zu digitalen Bibliotheken und den zukünftigen Entwicklungen werden in einem weiteren Teil besprochen. Schließlich wird auf das besondere Verhältnis der Geisteswissenschaften zur computergestützten Arbeit eingegangen und die aktuelle Situation kritisiert.
Díaz, Medina Elena. "Estudios sobre identificación, lactación y cría de dromedarios en la isla de Fuerteventura (Canarias)." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/457356.
Full textThe aim of this Thesis is to answer several key questions raised when trying to set up a dairy farm of Canarian camels in the island of Fuerteventura. For this purpose, 3 experiments were carried out to: set up the adequate individual identification (ID) of the camels (Exp. 1), to quantify the milk yield and to analyze the main milk components, including insulin (INS) levels, during lactation (Exp. 2), and finally, to study the glucose (GLU) and INS metabolism in suckling camels (guelfos) to improve their growth and survival (Exp. 3). In Exp. 1, different ID systems for camels, consisting of traditional (i.e., branding and ear tags) and modern (microchips, electronic ear tags and rumen boluses) devices, were evaluated in order to propose the most appropriate ID system according to exploitation conditions. A total of 558 dromedaries in 4 locations (Egypt, Saudi Arabia, Spain and Tunisia) were used during 3 yr. According to the camel life-span expectancy (25 yr), a low ID efficiency (0 to 27%) was observed for branding, injectable microchips and ear tags (visual and electronic), and their use as a single ID system was discouraged. The greatest reading ID performances (96 to 100%) were obtained with high-density (>3) electronic boluses, which advices on its use as a reference ID system in camels. In Exp. 2, 60 lactating she-camels were submitted to suckling (mo 0 to 6) and machine milking (×1 or ×2 daily) during 3 yr. Milk yield and composition (i.e., total solids, fat, protein, casein, lactose, ashes and INS) were measured in 4 stages of lactation: colostrum (d 0 to 2), early (d 3 to 103), mid- (d 104 to 244) and late- (d 245 to 365 d) lactation. A total of 316 samples (colostrum, n = 41; milk, n = 275) were collected. Average milk yield was 5.5 ± 0.3 kg/d (2.155 kg/yr) showing a peak in mid-lactation. Sample analysis was done by reference methods and by ELISA kits for bovine INS. Sample subsets were used to build up a calibration by near infrared spectroscopy (NIR). Colostrum composition and milk INS were unsatisfactorily predicted by NIR. On the contrary, prediction models were fully satisfactory for fat, protein and total solids in milk samples, and acceptable for the rest of components. Fat and protein milk contents (4.45 ± 0.10% and 2.90 ± 0.05%, on average, respectively) progressed inversely to milk yield, with minimum values in mid lactation (P < 0.05). Total milk solids decreased throughout lactation (12.2 ± 0.1%; P < 0.05). Camel milk was characterized by small fat globules smaller than 5 μm. The levels of INS in milk varied in a quadratic manner (P < 0.05) as lactation progressed (1.63 ± 0.29 ng/mL, on average) with a minimum in mid-lactation and did not correlate with blood values. In Exp. 3 GLU and INS metabolism were studied in 2 groups of suckling camels of different ages (A, 15 d, n = 5; B, 132 d, n = 5) submitted to GLU tolerance tests (0.25 g GLU/kg BW) and INS challenges (4.6 μg INS / kg BW) under fasting. Obtained results showed that suckling camels reach a natural stage of hyperglycemia and INS-resistance after birth, likely a “pseudo diabetes mellitus”, which increases with age and decreased GLU tolerance and INS secretion. Obtained results proved the evidence of GLUT independent of INS, together with a low utilization of free fatty acids from the mobilization of reserves of fat. These mechanisms seem to be related with savings of water and energy under subnutrition and heat stress conditions to warrant the survival of young camels.
Naranjo, Henríquez Helena Iballa. "Agotamiento del territorio : el caso de Gran Canaria." Paris 1, 2010. http://www.theses.fr/2010PA010534.
Full textLuna, Castrejón Linda Patricia. "Identificación de coccidias intestinales en canarios (Serinus canaria) en cautiverio." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2018. http://hdl.handle.net/20.500.11799/95248.
Full textIsospora bioccai (Cringoli and Quesada 1991) (Protozoa, Apicomplexa, Eimeriidae) is reported and described from captive canaries Serinus canaria forma domestica (Linnaeus 1758) in Mexico. The oöcysts are subspherical, 25.5 × 23.5 μm, with smooth, bilayered wall, ~1.3 μm thick. Micropyle absent, oöcyst residuum absent, and polar granule present, 4-8 rice-grain-shaped. Sporocysts are ovoidal, 16.7 × 10.5 μm. Stieda body knob-like and substieda body trapezoidal of irregular base. Sporocyst residuum is composed of granules of different sizes. Sporozoites are vermiform with one refractile body and a nucleus. Gamogony was seen in the duodenum. In addition to new locality, this is the first description of I. bioccai from S. canaria.
UAEM 4328/2017/CI
Sánchez, Vicente Santiago. "Contribución al conocimiento de la parasitofauna (Helmintos y Artrópodos) de Mamíferos no Lagomorfos de Canarias." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/128664.
Full textThe present Thesis evaluates the parasite biodiversity of free-living Mammals inhabiting the Canary archipelago. The main goal is the contribution to the knowledge of the helminth and ectoparasite fauna in isolated ecosystems. Those types of studies are required to establish comparisons with the parasite fauna present in other insular areas of the Mediterranean and Macaronesian Regions, as well as close peninsular and continental areas. A total of ten species of Mammals belonging to four different Orders were examined for the detection of parasites: 3 Insectivora (Atelerix algirus, Crocidura canariensis and Suncus etruscus); 1 Carnivora (Felis catus); 2 Artiodactyla (Ovis aries and Ammotragus lervia); and 4 Rodents (Atlantoxerus getulus, Rattus rattus, R. norvegicus and Mus musculus). In all, 1090 hosts were studied. Animals came from different habitats of each one of the Islands. Classical techniques of general Helminthology and Arthropodology were used to find, manipulate and identify the helminths and the ectoparasites. Molecular methods were used in those species which entailed some doubts in the final diagnosis. As a result of the analysis, 52 parasite species were detected, distributed in: 1 Trematoda, 11 Cestoda, 29 Nematoda, 2 Acanthocephala and 9 Arthropoda. Results shows that, structurally, the helminth biodiversity in Mammals from the Canary Islands is very similar to those fauna displayed by those vertebrates in their native continental habitats although, as it take place in all insular ecosystems, it is characterized by a decrease both in the number of species and in the prevalence of parasitization. Nevertheless, this pattern is not detected in fleas, which biodiversity in the Canary archipelago was qualitatively higher than in continental areas. In addition, the distribution of the parasite species throughout the archipelago was influenced by the climatic and physiographic characteristics of the different islands. Furthermore, the presence of suitable intermediary hosts, as well as paratenic hosts, could have an important role in the distribution of parasites. With regard to ectoparasites, fleas tend to be aggregated on hosts following certain assembly rules. Results showed that a high host population density as well as a high abundance of host-specific fleas, lead to the non-randomness of the Siphonaptera community on their hosts.
Castañeda, Zavaleta Marko Eduardo. "Análisis hidrogeoquímico de la cuenca del Río Mishca, distrito Canarias, provincia de Víctor Fajardo, Departamento de Ayacucho." Bachelor's thesis, Universidad Nacional Mayor de San Marcos. Programa Cybertesis PERÚ, 2011. http://www.cybertesis.edu.pe/sisbib/2011/castaneda_zm/html/index-frames.html.
Full textRúa, Tarín Mª del Pilar de la. "Variabilidad genética, análisis molecular y filogenia de poblaciones ibéricas y canarias de Apis mellifera (Linneo 1758) (Hymenoptera: Apidae)." Doctoral thesis, Universidad de Murcia, 1999. http://hdl.handle.net/10803/95890.
Full textThe main objective of this thesis is to characterise at the molecular level, the population variability of Apis mellifera Linné, 1758, and to corroborate in this way several hypotheses. One of them is related with the structure of the honeybee populations from Murcia and the racial effect derived from the queen importation and the migrating movements. Other hypothesis to be corroborated is referred to Canarian honeybees, whose origin could be either Northern Africa (due to natural events) or the Iberian Peninsula (due to human activities from XVI century). The existence of an endemic honeybee race from the Canaries will be investigated.
Arbelo, García Adolfo. "Las mentalidades en Canarias en la crisis del Antiguo Régimen : élites agrarias y comportamiento social en Tenerife (1750-1823) /." [La Laguna] : Centro de la cultura popular canaria, 1998. http://catalogue.bnf.fr/ark:/12148/cb37177497z.
Full textNotes bibliogr. Bibliogr. p. 221-225.
Viana, Rodríguez María del Mar. "Niveles, composición y origen del material particulado atmosférico en los sectores Norte y Este de la Península Ibérica y Canarias." Doctoral thesis, Universitat de Barcelona, 2003. http://hdl.handle.net/10803/1972.
Full textA través de la interpretación de series temporales antiguas y modernas de niveles de material particulado atmosférico se logra identificar los principales procesos naturales y antropogénicos que dan lugar a episodios con altos y bajos niveles de material particulado atmosférico. A escala sinóptica y en la meso-escala estos procesos son:
1. Intrusiones de masas de aire africano
2. Advección de masas de aire atlántico
3. Circulación regional de masas de aire
4. Advección de masas de aire de origen europeo
A escala local, los principales episodios de partículas tienen su origen en las emisiones ligadas a la actividad industrial o del tráfico. Se aportan datos cuantitativos para cada estación.
Los resultados obtenidos acerca de la composición química del material particulado se interpretan siguiendo dos enfoques distintos: por medio del análisis químico de los principales componentes del material particulado atmosférico (materia mineral, materia carbonosa [OM+EC], compuestos inorgánicos secundarios [CIS] y aerosol marino), y aplicando un análisis estadístico de contribución de fuentes mediante un modelo receptor.
Para finalizar este análisis se han comparado los resultados obtenidos con trabajos realizados en otros 6 Estados Miembros de la Unión Europea en los que se ha aplicado una metodología similar. Las concentraciones de componentes de origen típicamente antropogénico (materia carbonosa y compuestos inorgánicos secundarios) en dichos estudios europeos son análogos a los obtenidos en el presente trabajo. Sin embargo, los niveles de materia mineral son marcadamente superiores en las estaciones en España, y ello es debido principalmente a tres factores: a) la incidencia de episodios de intrusión de masas de aire africano con elevada carga particulada mineral; b) la mayor aridez de los suelos que favorece la mayor resuspensión; y c) la menor tasa de precipitación anual, que impide el lavado del material particulado depositado sobre las vías de tránsito (por erosión del firme de rodadura) y que por tanto es susceptible a volver a entrar en suspensión. Consecuentemente, no sólo es el fondo mineral en España más elevado, sino que existe también una causa antropogénica que contribuye a elevar los niveles de materia mineral en suspensión.
Vizueta, Moraga Joel. "Genómica de la adaptación en artrópodos: estudio del sistema quimiosensorial y de la radiación del género Dysdera (Araneae) en Canarias." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/668673.
Full textDuring their evolutionary history, arthropods have diversified adapting to different habitats, including several independent colonizations of land, and sometimes implicating rapid radiations coupled with dietary specializations. Although the chemosensory system likely played a critical role in many of these adaptations, the origin and evolution of the gene families that mediate chemoperception in arthropods is still discussed in some important aspects. The main objective of this thesis is to gain insights into the molecular evolution of chelicerate diversification and, specifically, to determine the role of natural selection in this process. On one hand, we studied the evolution of the chemosensory gene families in chelicerates using comparative transcriptome and genome analyses. We first developed a bioinformatic pipeline (BITACORA) for the identification and annotation of gene families in genome assemblies. Using this tool, we identified members of two of the major arthropod chemoreceptor gene families (GRs and IRs) in chelicerates, being some of them expressed in the chemosensory appendages of the spider Dysdera silvatica, which supports its role in chemoperception. These families evolved under a dynamic gene birth and death model influenced by episodic bursts of gene duplication yielding lineage-specific expansions. Noticeably, we characterized in chelicerates a gene family distantly related to insect OBPs, suggesting a more ancient origin of these soluble carriers than previously thought, and a new gene family encoding small globular secreted proteins, which is a good chemosensory gene family candidate. In addition, we discuss the absence of the CSP family in chelicerates, and the putative role of NPC2 members in chemoperception. On the other hand, we studied the radiation of the spider genus Dysdera in the Canary Islands, where species diversification occurs concomitant with repeated events of trophic specialization. We identified a number of genetic changes likely associated with this convergent adaptation, including some related to heavy metal detoxification and homeostasis, metabolism of important nutrients and venom toxins. We uncovered the specific molecular substrates of these changes at different hierarchical levels, including same genes, gene functions or amino acid positions, some of them promoted by positive selection. Globally, our results increase the knowledge about the molecular basis of adaptation and provide new insights into the predictability of evolution.
Campo, Moreno Sergio. "Cartografía de los sabinares de Juniperus turbinata Guss. en la reserva de la biosfera de El Hierro (Islas Canarias) mediante teledetección." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/666376.
Full textThe Juniperus turbinata Guss junipers, most extensive of the Canarian archipelago, are located in the El Hierro, it is the most sub-western island. The orography of the island is abrupt, with the highest summit being Malpaso with 1,501 m. The trade winds have an influence from the northern slope to the southern one. The combination of the trade winds of the NE and the topography of the island produces cloudiness in medium and high levels most days of the year. The genus Juniperus is a protected taxon in European legislation, in the Spanish and in various autonomous communities (Canary Islands and Andalusia). The advances in remote sensing allow to have images of great resolution, making it possible to delimit with more precision the surface of the junipers, increasing the reliability of those inaccessible areas. In addition they are an alternative before the difficulty of the field work. Studies have been carried out on the biodiversity of the junipers on the island of El Hierro, the current state of their populations, their capacity for regeneration, their possible regression and the actions to be taken to promote their conservation. The main objective of this work was the elaboration of the cartography of the Juniperus turbinata Guss., in the island of El Hierro, from GeoEye-1 images, and to determine the surface and density of individuals. As the obtaining of satellite images produces geometric distortions, they are affected by the atmosphere and by the relief, for that reason the geometric and radiometric corrections were made, which due to the characteristics of the island have been quite laborious. Different vegetation indexes were calculated and the results obtained the correction and classification of the existing vegetation covers are presented. Through historical sources it is known that its extension had been greater, but due to anthropic and environmental factors its surface has been considerably reduced. The results of this investigation allowed to know the current extension and density of the juniper according to the type of juniper, being a fundamental information for the management of the reserve.
Rivera, Martínez Jesús. "El volcán Tagoro y el banco de Concepción: Estadíos juvenil y maduro de la evolución geomorfológica de montes submarinos en aguas canarias." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/436895.
Full textA mes d'identificar i descriure les formes del relleu, la geomorfologia també mira d'escatir els processos i mecanismes causants. Això, que val per a la geomorfologia en general, també val per la geomorfologia submarina. La majoria de processos geològics que es donen al subsòl marí, al mateix fons i prop del fons, deixen una empremta observable, mesurable i interpretable en el fons marí. És cert, però, que a més dels processos geològics, hi ha altres tipus de processos físics, químics, biològics i antropogènics que també afaiçonen el fons dels oceans. Per altra banda, el mateix relleu submarí influencia aquests processos, tancant-se aixi una mena de circuit. Ho il•lustren les interaccions entre corrents de contorn i el fons, o entre el substrat i les comunitats bentòniques. L’ecosonda de multifeix és l’eina més valuosa per a l’estudi de la geomorfologia submarina i, en conseqüència, també ha estat l’eina principal d’aquesta tesi. Els models d’elevació digitals obtinguts a partir de dades de multifeix són el primer pas per a l’estudi integrat de la geomorfologia d'una regió o indret, i la base per planificar activitats de mostratge. En aquesta tesi, la localitzaci6 precisa i la interpretació dels elements del relleu han permès situar els punts de més interès per a una inspecci6 detallada, a més de guiar les tasques de mostratge i verificació d'allò observat i interpretat en els fons marins de les illes Canàries. L’arxipèlag canari està situat al marge passiu d’Àfrica nord-occidental. Però lluny d’obeir a un model estructural senzill i fàcilment interpretable, el context geològic regional de l’arxipèlag és força complex i el seu origen objecte de debat. A més, el conjunt d'edificis volcànics de que forma part l’arxipèlag consta de molt més que les set illes principals, doncs també l’integren un nombre molt alt de monts i turons submarins, el conjunt dels quals forma la província de monts submarins de les illes Canàries, un terme força més adequat per a referir-se a l’entorn geològic en que s’inscriu aquesta tesi. Les noves dades batimètriques d’alta resolució recollides en aquest treball, juntament amb altres dades complementàries, el seu anàlisi i la discussió del seu significat, representen una contribució original per a una millor comprensió del trencaclosques geològic de la província de monts submarins de les illes Canàries. Es tracta, però, d’una contribució que creiem que inclou elements clau. Per un costat, hem pogut documentar l’erupció submarina més recent ocorreguda en aigües de l’arxipèlag, enfora de la seva illa més jove, El Hierro, cosa que ha permès conèixer millor la contribuci6 d'aquests tipus d'esdeveniments a la formaci6 dels edificis volcànics insulars. Per un altre costat, hem fet palesa l’evolució tardana d’una antiga illa d’extensió més que notable, l’actual banc de Concepción, ara sota l’aigua. L’aplicació de tècniques de l’àlgebra de mapes i de la geomorfometria, aixi com la verificaci6 d'interpretacions mitjan;ant l'observaci6 in situ i el mostratge, donen objectivitat i solidesa científica als resultat assolits. Un dels resultats més rellevants del present treball és la constatació de la subtil frontera que se- para el que és vell del que és jove a la província de monts submarins de les illes Canàries, com ho il•lustra la formaci6 del volcà mes jove, l'any 2011 als fons del sud de El Hierro, al costat d'un edifici volcànic de 132 milions d'anys d'edat: el rift o dorsal sud d'El Hierro. També ens sembla particularment rellevant el paper de processos geològics i estructures antigues com a substrat modern d’hàbitats d’especial interès, com ara esculls de coralls d’aigües fredes i comunitats qui- miosintètiques d'aigües profundes, tal i com il•lustra el cas del banc de Concepción.
Beyond identifying and describing landforms, geomorphology aims at unveiling their causative processes and mechanisms. This, which applies to geomorphology in the broadest sense, is also valid for submarine geomorphology. Most of the geological processes that occur below, at and close to the seafloor leave an observable, measurable and interpretable imprint on it. However, it is also true that processes other than geological do shape the seabed as well. These include a ran- ge of physical, chemical, biological and anthropogenic processes. Moreover, the submarine lands- cape influences those processes in an action/reaction loop. This is illustrated by the interactions between contour currents and the bottom, or between the substratum and benthic communities. The multibeam echo sounder is the most valuable tool to investigate the geomorphology of the marine environment and, therefore, has been the main tool for this thesis. The Digital Elevation Models (DEMs) resulting from multibeam data are the first step for the comprehensive study of a region or site geomorphology, and the main reference for the planning of sampling activities. In this thesis, the precise location and interpretation of landforms, has allowed to pinpoint the ‘hot spots’ deserving detailed inspection, to guide sampling and to groundtruth the observations and interpretations made across the seafloor of the Canary Islands. The Canary archipelago is located on the passive continental margin of Northwest Africa. But far from responding to a simple and easy to interpret structural model, the geological setting of the archipelago is quite complex and its origin still debated. Furthermore, the cluster of volcanic edifices to which the archipelago belongs is much more than the main seven islands, as it also consists of a large number of seamounts and submarine knolls, altogether forming the Canary Is- lands Seamount Province, a more appropriate term to refer to the geological setting of this thesis. The new high-resolution bathymetric datasets gathered in this work, and other complementary data, together with the analysis and discussion of their meaning, represent a novel contribution for an improved understanding of the Canary Island Seamount Province geological puzzle. We think this contribution includes key elements. On one hand, we have been able to document the most recent submarine eruption around the archipelago, offshore its youngest island, El Hierro, which has resulted in a better knowledge of the contribution of this kind of events to the outbuil- ding of the volcanic edifices forming the islands. On the other hand, we have evidenced the late evolution of a rather large old island, Concepcion bank, now under water. The application of map algebra and geomorphometry techniques, jointly with the groundtruthing of interpretations by means of in situ observations and sampling provide scientific objectivity and robustness to the results achieved. One of the most noticeable outcomes of the present work is the finding of the narrow separation between the old and the young in the Canary Island Seamount Province, as illustrated by the eruption of the youngest submarine volcano in 2011 south of El Hierro besides to a 132 Ma old volcanic edifice off the south rift of El Hierro. The role of ancient geological processes and struc- tures as substratum for modern habitats of special interest also looks highly relevant, as illustrated by the cold-water coral reefs and deep-water chemosynthetic communities found in Concepcion Bank.
Martín, Pérez Francisco Javier. "Análisis estratégico del sector naviero de las Islas Canarias en el periodo 1718-1778: factores determinantes en la evolución de su rendimiento." Doctoral thesis, Universidad de Alicante, 2015. http://hdl.handle.net/10045/55370.
Full textChébaux, Julie. "Discrimination de parentèle et interactions sociales chez le canari domestique, Serinus canaria." Thesis, Paris 10, 2009. http://www.theses.fr/2009PA100174/document.
Full textMany studies showed that individuals are able to discriminate their kin. kin discrimination influences male and female mate choice and male territory defence. Early social experience (familiarity) influences also social interactions of individuals. The aim of this thesis is to study the capacity of domestic canaries to discriminate individuals of different relatedness degrees (brother, cousin and non-kin) and of different length of early social experience. Results indicate that males copulate with less familiar female and they show sexual preferences for cousin partner. Then, females show sexual choice and preferences for males and male songs with which they had a short early social experience. However, their sexual choice and preferences were not dependent to male relatedness degrees. Finally, males discriminate males of different relatedness degrees during direct encounters or by listening their songs. This influences their social interactions. To finish, our results indicate that contact calls of female and male are acoustically different. Thus, this thesis show that male and female domesticated canaries are able to discriminate directly or via male songs individuals of different degree of relatedness and with which they share a different length of early social experience
Lerch, Alexandre. "Causes de la variabilité du choix de partenaire chez les femelles de canaris domestiques Serinus canaria." Thesis, Paris 10, 2010. http://www.theses.fr/2010PA100106/document.
Full textThe guiding principle of this thesis is the variability of partner choice in females of domestic canaries Serinus canaria. It is developed in three chapters. The first two chapters present studies in which the females are exposed to two types of male songs: a highly attractive A16 song and a weakly attractive A8 song. The number of Copulation Solicitation Displays (CSDs) adopted by the females enables one to determine their sexual motivation (the total number of CSDs), their preference for one of both types of song, and also their choosiness (the proportion of CSDs for A16 compared to the total number of CSDs). In the experiments of the first chapter, two types of treatments enable us to modify the condition of the females. In the first experiment, the wing feathers of some females were shortened. In the second, both groups of females were fed different diets. The results indicate that domestic canaries females can evaluate their own condition and can produce adapted responses to male song. Individuals with better condition were found to be more choosy. The second chapter identified different contexts in which females modify their behavioural responses to male song. The timing of the playbacks stimuli is a factor explaining the pattern of the produced CSDs. The time of day has an impact on female choosiness, the day of the laying cycle modifies sexual motivation, choice and choosiness, and, finally, the order of the laying cycle has an effect on the sexual motivation and on female choice. However, no impact effect of social rank was identified in our study. The last chapter deals with sperm choice by the domestic canary female. Before copulating, females must sometimes choose non optimal males. The experiments of this chapter demonstrate that females can reject the sperm of their previous partner in their defecations and that this rejection is more common when they hear good quality male songs. These results indicate that females of domestic canaries adapt their sexual responses as a function of the condition and of the context in which their choices are made. Sexual selection does not stop at the time of the partner choice since the mechanisms of directional cryptic choice (i.e. that goes in the same direction as pre-copulatory choice) are described in the last chapter of this manuscript
Bouillet, Ophélie. "Plasticité individuelle : influence du statut social et de l’ontogenèse chez le canari domestique, serinus canaria." Thesis, Paris 10, 2013. http://www.theses.fr/2013PA100212/document.
Full textThis study demonstrated the social status influence on different individual caracteristics as song, personality or cognition in common domesticated canaries, Serinus canaria. Social rank associated with familiarity have an important influence on forraging strategies. This one is considered as personnality trait. Behavioral syndromes and photoperiods influence on repeatable personnality trait were suggested. Individual ontogeny as development acoustic condition has an impact on behavioral syndromes. These ones seem to be linked to the vocal production as song, and to the cognition as food research task learning. The social status influence the cognition in canaries. Nevertheless, no relation between different individual caracteristics and the heart rate has to be démonstrated
Gomez, Kobayashi Tamara. "Från massmord till turistattraktion : En analys av hur den kanariska ursprungsbefolkningens mänskliga kvarlevor har behandlats." Thesis, Uppsala universitet, Institutionen för arkeologi och antik historia, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413518.
Full textLas Islas Canarias son un destino turístico popular. Pero, detrás del buen clima y las hermosas playas hay una historia traumática. Guanches, indígenas de la isla, murieron como resultado de la colonización española. Hoy solo quedan algunos aspectos de la vida de los Guanche - sus restos humanos y su cultura material. La intención de este estudio es ver cómo se tratan los restos humanos de Guanche y, en consecuencia, como ha afectado las exhibiciones en los museos. Para poder hacer conclusiones, se ha evaluado la exposición osteológica de El Museo Canario. La exposición apenas se ha cambiado desde 1880 y claramente ha sido influenciada por factores como el colonialismo, el nacionalismo, el turismo y la etnicidad. La ética detrás de esta exposición también ha sido discutida. La conclusión de esta discusión fue que El Museo Canario se ha adherido a consideraciones éticas. Sin embargo, hay aspectos de la exposición que podrían mejorarse. Además, se han examinado artículos de la publicación de El Museo Canario de 1880–1900 y 2007–2011 para ver cómo los motivos de investigación se han cambiado con el tiempo. Los resultados de este análisis muestran que existen claras diferencias entre los motivos de investigación según el año de publicación. Este cambio de mentalidad no se refleja en la exposición osteológica de El Museo Canario.
Sainz-Maza, Aparicio Sergio. "Caracterización gravimétrica de zonas de rift en islas volcánicas oceánicas : aplicación a las islas de Tenerife y el Hierro." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/461592.
Full textRift systems in oceanic volcanic areas are related to the growth of large volcanic buildings and are defined as areas of the crust subjected to extensive stresses that generate fractures in the form of fissures through which lava is emitted. The groups of cracks delineate rift systems. Traditionally, they have been considered deep structures acting as conduits that connect the areas of magma generation in the mantle with the earth's surface, controlling the magma rise in a way direct. Some recent studies based on geological, geophysical and paleomagnetic data question this deep rooting, considering instead a shallower origin. This origin would be associated with both regional tectonics and local processes related to variations in the gravitational load during the development process of volcanic buildings. In order to increase the knowledge of these systems we have studied the rift systems of Tenerife and El Hierro, both located in the Canarian Archipelago. Both, offer the opportunity to carry out a study of this type in view of its surface characteristics. Morphologically, these islands present three potential zones of rift, also denominated "dorsales". In surface, both islands show a similar arrangement of their basaltic volcanism along these “dorsales”, having traditionally been proposed a triple rift configuration in each island. We built an internal image of the Tenerife and El Hierro rift systems based in 3D models of subsoil density contrasts. These models were obtained by the application of an inversion genetic algorithm based on gravity data which uses as input parameters gravimetric anomalies. These models are the basis on which we will develop the subsequent discussions. The model obtained for the El Hierro Island, the rift systems are poorly rooted structures. They would have a shallower origin. Moreover, the three-dimensional model obtained for the north- western ridge of the island of Tenerife suggests a structure similar to the previous one, a superficial origin of these rift systems. In contrast, the comparison between the models corresponding to the structure under the “dorsal” and the subsurface structure corresponding to the southern part of the island, shows clear differences between the two. This indicates that the origin of both is different and, therefore, the volcanic model of the southern part of the island would be more in correspondence with a monogenetic volcanic field than with a typical configuration of rift, as already had been suggested in previous works.
Moreno, Caballud Ana. "Registro del aporte de polvo de origen sahariano y de la productividad oceánica en la Cuenca Norte de Canarias y en el mar de Alborán." Doctoral thesis, Universitat de Barcelona, 2002. http://hdl.handle.net/10803/1915.
Full textEsta Tesis Doctoral se centra en la reconstrucción de la variabilidad climática en una sección latitudinal que abarca desde la Cuenca del Norte de Canarias, en el noroeste de África, hasta el Mar de Alborán, en el Mediterráneo Occidental. La información paleoclimática ha sido extraída fundamentalmente a partir del análisis granulométrico y geoquímico, para elementos mayores y traza, de los sedimentos. La aplicación de técnicas de análisis espectral sobre las series de datos ha servido para determinar las ciclicidades de los registros paleoclimáticos.
Las variaciones en los aportes de polvo de origen sahariano-saheliano a las cuencas estudiadas se correlacionan con los cambios climáticos en las áreas fuente. El flujo de polvo eólico a la Cuenca del Norte de Canarias alcanza sus máximos en los períodos más húmedos, en relación con los mínimos en el índice de precesión. El aumento de la meteorización ligado a estos periodos más húmedos incrementaría, probablemente, la disponibilidad de partículas en el área fuente susceptibles de ser transportadas por el viento. Por otra parte, tanto los indicadores de transporte eólico como de productividad marina superficial revelan que, en la Cuenca del Norte de Canarias, los alisios se intensificaron en las terminaciones glaciales, en paralelo con la fusión del manto de hielo de Groenlandia. Por tanto, nuestros resultados apuntan a una rápida respuesta del sistema de vientos alisios a los cambios en temperatura y salinidad de las latitudes altas.
El aporte de polvo del norte de África al Mar de Alborán, durante el Estadio Isotópico 3, se acentúa al inicio de los periodos fríos de los ciclos de Dansgaard/Oeschger registrados en los testigos de hielo de Groenlandia. Consideramos que las variaciones de alta frecuencia de los gradientes de presión atmosférica en el Atlántico Norte, de un modo similar a la actuación de la Oscilación del Atlántico Norte actual, operarían a la escala de los ciclos de Dansgaard/Oeschger. Por tanto, se impulsaría el establecimiento de un escenario meteorológico que favorece la llegada de intrusiones saharianas al Mediterráneo a la vez que promueve una mayor aridez en la región mediterránea y norteafricana. La paleoproductividad superficial en el Mar de Alborán también fluctúa ligada a los ciclos de Dansgaard/Oeschger. Los picos de productividad coinciden con los del registro polínico que muestran periodos más húmedos. De esta manera, la productividad pudo haber aumentado con relación a la mayor descarga fluvial con la consiguiente entrada de nutrientes en la cuenca. Esta hipótesis puede tener importantes implicaciones en la investigación de los cambios climáticos a escala submilenaria.
Calero, Cordobés María José. "CATALOGACIÓN Y ESTUDIO DEL PATRIMONIO RETABLÍSTICO PERTENECIENTE A LAS IGLESIAS Y ERMITAS NO PRIVADAS DE LA ISLA DE LA GOMERA." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/94042.
Full textIn the Canary Islands, there are many retablísticas works of relief importance within the island art, among which the baroque altarpiece stands out, works many of them cataloged in the work of Alfonso Trujillo Rodríguez. On the island of La Gomera, in addition to the Neo-Gothic altarpiece, Neo-Renaissance and Neo-Baroque, there is an important representation of the Baroque altarpiece in the island's most important churches, San Salvador Church, Santo Domingo de Guzmán Church and Ntra. Mrs. of the Assumption. For its study, catalogs of each of the works have been made, placing a special interest in the baroque retablística of the island. They study and compare their characteristics with those of the "Baroque Retablo Propio or Island" showing that both are virtually identical so they should be named in the same way as the baroque altarpiece of the rest of the islands and therefore be included in the cataloging Of the Baroque Canarian altarpiece.
En Canaries existix un gran numero d'obres RETABLÍSTICAS de rellevada importancia dins de l'art illenc entre les que destaca el retaule barroc, obres moltes d'ella catalogades en l'obra d'Alfons TRUJILLO RODRÍGUEZ. En l'illa de La Gomera, ademes del retaule NEOGÓTICO, NEORRENACENTISTA i el NEOBARROCO, existix una important representacio del retaule barroc en les esglesies mes significatives de l'illa, Esglesia de Sant Salvador, Esglesia de Sant Dumenge de GUZMÁN i l'Esglesia de NTRA. Sra. de l'Assuncio. Per a el seu estudi s'han realisat fiches catalec de cada una de les obres posant un especial INTERÉS en la RETABLÍSTICA barroca de l'illa. S'estudien i comparen les seues caracteristiques en les del "Retaule Barroc Propi o Illenc" demostrant que abdos son practicament identiques per lo que estos deurien denominar-se d'igual modo que el retaule barroc del restant de les illes i, per lo tant, ser incloses en la catalogacio del retaule barroc canari.
Calero Cordobés, MJ. (2017). CATALOGACIÓN Y ESTUDIO DEL PATRIMONIO RETABLÍSTICO PERTENECIENTE A LAS IGLESIAS Y ERMITAS NO PRIVADAS DE LA ISLA DE LA GOMERA [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/94042
TESIS
Salvin, Pauline. "Les signaux des femelles dans la communication intersexuelle ; études chez le canari domestique, Serinus canaria." Thesis, Paris 10, 2018. http://www.theses.fr/2018PA100137/document.
Full textMuch studies on reproduction and animal communication have considered the female as the passive sex; the role of the female during male-female interactions have often been overlooked. However, there is growing evidence that female behaviours can affect those of the males and that males can adjust their courtships to female behaviours. The aim of this thesis is to understand the signals produced by females during interactions with a male in a reproductive context in the domestic canary. Overall, my results show that females not only use their visual and acoustic signals, the copulation solicitation display and the female-specific trills, as an invitation to copulate but also to incite male to sing as an aid to sample potential mates. Then, these two signals could not have the same efficacy in different contexts of transmission. Moreover, the visual components of the communication seem to be more important than previously thought during intersexual interactions in this species. Finally, this thesis provides new elements about the female preferences for male songs and shows that methods used to test female preferences in laboratory are reliable and congruent. This thesis contributes to the growing number of researches showing that females play an active role in intersexual interactions
Hellström, Jennie. "ACTITUDES HACIA LA VARIEDAD CANARIA : Un estudio sociolingüístico de estudiantes universitarios en Las Palmas de Gran Canaria." Thesis, Högskolan Dalarna, Spanska, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:du-22534.
Full textThe purpose of this study is to analyze the language attitudes of twenty university students in Las Palmas de Gran Canaria towards the Canarian variety of Spanish compared to standard Spanish. The investigator uses a modified matched-guise technique to test the subjects´ responses to speech samples from four speakers reading the same text: two Canarian speaking voices and two voices speaking the standard Spanish variety. The subjects listen to the recording and thereafter answer a questionnaire that evaluates their language attitudes. The results show that prestige and solidarity are evaluated variously. In the dimension of prestige the respondents held more positive attitudes towards the standard variety of Spanish while the Canarian variety received less positive virtues and the respondents evaluated their own variety in an unfavorable way. In the dimension of solidarity the attitudes towards the Canarian variety are contradictory, indicating a possible division between the judgement of an educated variety and a vulgar variety.
Domínguez, Araújo Lara. "La evaluación para el aprendizaje de la interpretación de conferencias. Concepciones y prácticas de docentes y discentes en tres cursos de posgrado de Cataluña, Portugal y Canarias." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/317965.
Full textThis dissertation focuses on trainers and trainees’ practices and views on assessment for learning in conference interpreter training. It uses a qualitative approach based on data collected in three postgraduate courses in Catalonia, Portugal and the Canary islands during the academic year 2010-2011. It reviews literature on educational assessment and assessment in interpreter education, including the evolution of educational assessment over time and prevailing paradigms on learning —behaviourism, cognitivism and sociocultural or constructivist theories, learning as mediation and interaction and other key concepts (meaningful learning, Zone of Proximal Development, dialogic view on learning and self-regulation)—, as well as types of assessment and definition of assessment for learning; interpreter education over time, conference interpreting assessment construct, formative assessment and assessment for learning , key concepts such as metacognition and deliberate practice, interpreting assessment tools, feedback, and students’ involvement in conference interpreting assessment. Primary sources consist of individual interviews with trainers and focus groups with trainees, as well as questionnaires for both groups; qualitative content analysis of this information is presented with quotes by query tool. Secondary sources consist in class observation, and include transcripts of meaningful pieces of classroom assessment, analysed in terms of content, purpose and development, feedback reception, students’ involvement and process-vs.-product-oriented approach on criteria selection. Findings account separately for trainees’ and trainers’ view on assessment, as a result from the triangulation of information analysis on trainers’ interviews and questionnaires on the one hand, and trainees’ focus groups and questionnaires on the other. Furthermore, they include results from the statistical contrasting of quantitative data on criteria obtained through questionnaires by trainees and trainers, as well the as researcher’s view on assessment practices in the classroom —resulting from class observation, class recordings reviewing and focused analysis of assessment transcripts. Conclusions discuss trainees’, trainers’ and researcher’s views by answering research questions. They show that assessment plays a very important role in the conference interpreting classroom, due to its usefulness for benchmarking, fostering metacognition, self-regulation and autonomy, both during the course and as a basis for the student’s career. For assessment to be useful for learning, both trainers and trainees agree on the fact that such assessment must be clear, accurate and demanding on the one hand, so that false expectations are not raised, but at the same time it must be able to convey the confidence on the trainee's ability to overcome obstacles.. They refuse assessment as mere validation or mistake list, without considering its relevance in the performance or for the particular trainee, or feedback focused only on the form of a performance, interpretation as a product or destructive feedback, since this prevents feedback to be integrated and hinders learning progress. Furthermore, the difficulty of assessment is highlighted and more clarification and consistency on assessment construct is missed. Last, the constant presence of assessment may distract students from real practice of interpreting and the role of communication in such process.
Béguin, Nathalie. "Activites reproductrices chez la femelle canari domestique (serinus canaria) : importance du partenaire sexuel et influences hormonales." Paris 13, 1998. http://www.theses.fr/1998PA132042.
Full textGasparini, Anne. "Hydrochimie et géochimie isotopique de circulations souterraines en milieu volcanique sous climat semi-aride (Grande Canarie, îles Canaries)." Paris 11, 1989. http://www.theses.fr/1989PA112392.
Full textPasteau, Magali. "Ontogenèse des préférences du canari domestique commun (Serinus canaria) pour différents paramètres acoustiques du chant des mâles." Paris 10, 2007. http://www.theses.fr/2007PA100030.
Full textDuring this thesis, we tried to determine the acoustic preferences of female canaries (Serinus canaria) in order to better understand their roles in partner choice and to better apprehend the processes which could guide the development and the evolution of male song. First, we realized a series of experiments to study predispositions and preferences of females for different structural characteristics of male “sexy phrases” as frequency level, intensity, amplitude modulation or duration of these phrases. Then, we evaluated when males and females discriminated between homospecific and heterospecific songs and when they expressed these capacities to discriminate. Our results seem to indicate, for tested acoustic parameters, that learning could maintain and/or reinforce present predispositions which are expressed at ten days old
García, Pérez Olaya. "The explosive volcanism of Teide-Pico Viejo volcanic complex, Canary Island." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/130923.
Full textEl complejo volcánico Teide Pico Viejo (TPV) es un stratovolcano situado en la isla de Tenerife, Islas Canarias, y ha sido considerado por la UNESCO el sistema volcánico activo más peligroso en Europa. Los eventos explosivos en el complejo TPV se han limitado tradicionalmente a la erupción subplinian de Montaña Blanca, que ocurrió hace unos 2000 años. Una reciente revisión de la estratigrafía muestra que la actividad explosiva fonolítica asociada a TPV ha sido significativa durante el Holoceno, presentado distintos episodios relacionados con erupciones que varían en tamaño de estromboliano a sub-pliniano. A través de las correlaciones estratigráficas obtenidas mediante observaciones de campo y datos de mineralógicos y geoquímicos, se han identificado 11 erupciones explosivas fonolítica relacionados con los domos satélite presentes en todo complejo TPV. Una de las erupciones más representativa es El Boquerón (5660 YBP), un domo que generó un evento explosivo de VEI 3 con un volumen mínimo de 4-6x107 m3 y produjo una columna con una altura de hasta 9 kilometros sobre el nivel del mar ( MER 6.9-8.2x105 kg / s, durante 9-15 h). La ocurrencia de estos eventos explosivos en el reciente registro eruptivo del complejo TPV es de gran importancia para evaluar el riesgo impuesto por el complejo volcánico en Tenerife. Estas erupciones han generado una amplia gama de amenazas directas, como los depósitos de caida, emplazamiento de las corrientes piroclásticas densidad, flujo de derrubios, lahares y avalanchas de roca, lo que podría ocurrir de nuevo en caso de renovación de la actividad volcánica. Los resultados obtenidos en nuestro estudio son relevantes para definir escenarios eruptivos realista y precisos para el complejo TPV y para evaluar su riesgo asociado, un paso necesario en la evaluación y mitigación del riesgo volcánico en Tenerife
Le, Brun Nathalie. "Un aspect de la conquête des Îles Canaries par les Européens : les pactes avec les Canariens : (XIVème et XVème siècles)." Poitiers, 2003. http://www.theses.fr/2003POIT5017.
Full textIn 1402, begins the process of annexion of the archipelago of the Canaries to the kingdom of Castille. This one will be completed officially only by 1496. Before taking the weapons, Frenchmen and Castillans endeavour, during this period, to seal agreements with Canarians and thus exert a first form of domination, founded on the introduction of kinds of protectorates, in the islands. The pacts concluded in the XV century marked the passage of a stage of the conquest to another. In spite of the agreements, the incompatibility between certain European objectives and the forms of Canarian organisation threatened the agreement, compromised the materialisation of the political and religious objectvives of Europeans in the islands and announced the use of the force by the latter. The pacts carried out the destruction of the Canarian societies, but this one was carried out only in the prolongation of the upheavals which have occured within these same societies since the XIV century
Belguermi, Ahmed. "Comment profiter au mieux de l’information ? Étude chez le canari domestique, Serinus canaria et le pigeon biset Columba livia." Thesis, Paris 10, 2011. http://www.theses.fr/2011PA100030/document.
Full textSocial information, foraging behaviour, urban area, Serinus canaria, Columba liviaGetting information is very important for animals. Indeed, the behavior will be better suited if based on accurate assessment of environmental parameters. Our study focuses on the use of social information in two species of birds. Two experiments were conducted on the domesticated canary (Serinus canaria) in laboratory conditions, at the LECC of the University Paris Ouest Nanterre La Défense (France). And four others were conducted on the rock dove (Columba livia) in urban area “Jardin des Plantes” in Paris.In canaries, we demonstrated the use of social information, this by using visual and acoustic cues in foraging activities. The songs noises were more used by the canaries that calls. The birds were still susceptible to ambiguous information. In pigeons, we observed a capacity of discrimination and recognition of heterospecific individuals (human feeders). Two behavioral profiles were identified (regular vs. occasional), these profiles linked to the morpho-physiological characteristics of pigeons. The pigeons were also able to use acoustic cues such as predator calls (crows, gulls, and kestrels), flight noise of conspecifics and even heterospecific alarm calls (Blackbirds) to detect the presence of danger. Finally we found that the quantity of food available played a role on foraging behavior of pigeons.In conclusion, domestic canaries and feral pigeons are able to use different types of social cues when foraging and extract information from these cues for an efficient exploitation of the feeding sources
Opatova, Vera. "Diversity and evolutionary history of mygalomorph spiders in the Western Mediterranean and the Canary Islands = La diversidad e historia evolutiva de las arañas migalomorfas en el Mediterráneo Occidental y las Islas Canarias." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/146288.
Full textEl infraorden Mygalomorphae es uno de los tres linajes evolutivos principales reconocidos dentro de las arañas, pero su diversidad en el Mediterráneo ha sido en general poco estudiada. Los factores que contribuyen al escaso conocimiento taxonómico del grupo tienen que ver con sus hábitos crípticos y su uniformidad fenotípica. Dicha uniformidad, convierte al grupo en un sistema para testar métodos de delimitación de especies. Por otro lado, el grupo se caracteriza por un baja capacidad de dispersión y elevado sedentarismo, constituyendo un modelo excelente para estudios de biogeografía, ya que sus distribuciones pueden reflejar procesos geológicos tales como la deriva continental. En esta tesis se ha utilizado una metodología integrativa que combina secuencias de DNA de múltiples genes, genotipado mediante AFLPs y modelación de distribución de especies, para abordar una serie de cuestiones relacionadas con la diversidad de este grupo. Mediante el uso de los métodos de análisis filogenéticos, inferencia del marco temporal de la diversificación del grupo y la aplicación de los métodos bayesianos coalescentes para la delimitación de especies se identifican los principales factores que promovieron la diversificación de los migalomorfos en la cuenca mediterránea, se contrastan diferentes escenarios biogeográficos sobre su origen y se investiga su estatus taxonómico. Los resultados de esta tesis mejoran notablemente el conocimiento actual sobre la diversidad críptica, la biogeografía y la filogenia de las familias Ctenizidae, Hexathelidae e Idiopidae que habitan el Mediterráneo e Islas Canarias. En todos los grupos estudiados se han detectado linajes evolutivos independientes que pueden corresponder a especies nuevas. Nuestros resultados ponen en evidencia que los eventos geológicos pasados tales como la desintegración de Gondwana, Laurasia y el Cinturón Herciniano modelaron la distribución actual de los migalomorfos Mediterráneos y que las Islas Canarias fueron colonizadas desde el continente una sola vez. Los resultados de esta tesis también confirman la polifilia de las familias Ctenizidae y Hexathelidae y ponen de manifiesto la necesidad de reevaluar los caracteres morfológicos utilizados en la taxonomía actual.
Parisot, Maelle. "Le statut social et le choix du partenaire chez le canari domestique commun (Serinus canaria): indices comportementaux, hormonaux et vocaux." Paris 13, 2004. http://www.theses.fr/2004PA132018.
Full textDEPRAZ, VIOLAINE. "Influence de l'experience acoustique precoce et recente sur l'expression des comportements reproducteurs chez la femelle de canari domestique (serinus canaria)." Paris 13, 1999. http://www.theses.fr/1999PA132050.
Full textRosa, Hormiga Milagros de la. "Eficacia de un programa comunitario de prevención de trastornos psicosociales y psiquiátricos a nivel municipal: municipios de Santa Úrsula y Candelaria de la provincia de Santa Cruz de Tenerife, Comunidad Autónoma de Canarias." Doctoral thesis, Universidad de Alicante, 2012. http://hdl.handle.net/10045/24962.
Full textLópez, Moreno Carmen. "Geophysical evidence of the preparedness for a volcanic eruption: El Hierro 2011-2012." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/461580.
Full textEl análisis de datos geofísicos y geodésicos en un amplia área que comprende al oeste la Dorsal Oceánica Atlántica, al norte la falla Azores-Gibraltar y el Sur de Iberia y al sur el NW de Marruecos y las Islas Canarias, nos ha permitido realizar un estudio entre la posible relación entre magmatismo y actividad tectónica. En concreto el estudiar su posible influencia en el desencadenamiento de la última erupción ocurrida en la isla de El Hierro en 2011. La ausencia de datos instrumentales previos que describen tal proceso en Canarias, nos dio la oportunidad de analizar por primera vez las señales geofísicas registradas antes, durante y después de un evento eruptivo, permitiendo el estudio de la actividad al emplazamiento y migración del magma a través de la litosfera. El objetivo de esta tesis doctoral es hacer una revisión integral de la física de este proceso eruptivo y sus causas, a través del análisis y procesamiento de datos geofísicos que se han registrado desde la época del primer registro instrumental existente en el área, el presente. Se consideran tres aspectos principales, centrados en el fenómeno eruptivo de El Hierro en diferentes escalas temporales y espaciales, pasando de lo general a lo específico. El primer aspecto es el estudio de la posible relación entre la geodinámica regional y el evento eruptivo de El Hierro 2011-2012. Se analizan los datos sísmicos y geodésicos adquiridos de 1996 a 2014, que abarcan desde el Atlántico Norte hasta el Oeste, hasta la frontera Azores-Gibraltar al Norte (incluido el margen NW-África) y Canarias. Un análisis conjunto permitió identificar signos tempranos de actividad tectónica anómala a partir de 2003, cuya intensidad aumentó en 2007, acelerándose tres meses antes del inicio de la erupción volcánica en El Hierro en octubre de 2011. El segundo aspecto es el estudio del periodo de unrest (10 Julio-10 Octubre). Los resultados muestran en El Hierro evidencias de: inyección de magma bajo la corteza, sobrepresurización, fracturación hidráulica (inicialmente de fluídos ricos en gas), migración hacia el Sur, superación del Moho desencadenando sismicidad inducida en fallas preexistentes y migración hacia la superficie, probablemente en condiciones de irreversibilidad. El tercer aspecto estudiado los las condiciones finales de ascenso de magma a la superficie y de establecimiento de la erupción (6 Octubre-15 Octubre), mostrando cambios en la geometría asociados al establecimiento del edificio volcánico, así como cambios en la composición del magma en los primeros días de la erupción.
Lenouvel, Philippe. "Variations interindividuelles de caractéristiques acoustiques et visuelles, influence du contexte social : études chez le canari domestique (Serinus canaria) un oiseau chanteur." Paris 10, 2007. http://www.theses.fr/2007PA100048.
Full textThe aim of this study was to investigate interindividual variability of acoustic and visual communication in male domestic common canaries (Serinus canaria). First, our results show: 1) that during intersexual interactions males emit song containing a series composed of two very contrasted phrases (one in question is a ‘sexy phrase’ which is strongly attractive for females), and 2) that at the beginning of the breeding season, these males show two different singing behaviours: males that sing only in the presence of females, and males that sing essentially when alone. Then, we observe that males that spend the most time singing groom less, and males that sing the least groom the most, essentially their beak. To further investigate this result, we measured visual properties of the males’ beak and feathers. Our results show that beak grooming behaviour has no influence on the visual properties of the beak. However, we observe that the more males groom their feathers, the brighter their throat is compared to the visual background. These studies which deal with acoustic and visual properties are discussed in accordance with hypothesis on redundancy and complementarity of multiple signals used in sexual selection theories
Amy, Mathieu. "Utiliser les informations fournies par les interactions entre les congénères pour ajuster son comportement : études chez le canari domestique commun (Serinus canaria)." Paris 10, 2007. http://www.theses.fr/2007PA100133.
Full textGrowing studies have focused on the social environment in which communication occurs. This social context has been for a long time ignored in the study of animal behaviour. These studies show that individuals gather information from the interactions of their conspecifics. This information allows individuals to choose the best alternative to enhance their survival or fitness. To date, the different contexts in which individuals gather and use this information are poorly understood. The aim of my thesis is to explore some of these contexts in the domestic canary. Overall my results show that mates and females eavesdrop on visual and acoustic mate-mate interactions and use the gathered information to adjust their behaviour. Females use information gathered from a visual interaction and information gathered from a vocal interaction differently; the kind of signals used in male-male interactions may account for this discrepancy. Females do not seem to use information to adjust their behaviour when gathered information is conflicting. Furthermore they do not copy the mate choice of other females. Mates are inhibited by a 'winner' of a visual or acoustic interaction. This thesis suggests that multiple social interactions can be at the origin of different types of information