984 resultados para Laguna, Invertebrati macrobentonici, Vegetazione


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El Archivo del Patrimonio Fotográfico y Fílmico del Valle del Cauca es responsabilidad de la Biblioteca Departamental del Valle Jorge Garcés Borrero, por convenio de cooperación suscrito con la Secretaria del Cultura Departamental, con el fin de aunar esfuerzos para su conservación, preservación y divulgación del Archivo entre la comunidad Vallecaucana, especialmente entre los estudiantes e investigadores que visitan la Biblioteca, propiciando el su uso y consulta permanente. La universidad Icesi es un colaborador en el proceso de difusión, facilitando la tecnología que permite la consulta de las imágenes.

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Las personas jóvenes, desarrollan su actividad en un contexto mediatizado por la presencia constante de las TIC. En este estudio nos centramos, concretamente, en la percepción que una muestra del alumnado, matriculado en la Universidad de La Laguna, tiene acerca de la importancia y la frecuencia del uso de Internet. Los datos se han obtenido a través de un cuestionario online que ha sido distribuido a través de las redes sociales. El perfil de los informantes de esta muestra destaca por tener, en su gran mayoría, acceso a Internet ilimitado, conectarse a través de línea ADSL y del dispositivo móvil. Perciben que su conexión a la red oscila entre las dos las cinco horas. En cuanto a las redes, usan mayoritariamente Facebook y Whatsapp. Y por lo que respecta a la importancia que dan a los usos de Internet conceden una puntuación más alta a la formación y consideran que también es el uso que realizan con más frecuencia

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Tese de dout. em Ciências do Mar, Instituto de Investigação das Pescas e do Mar, Univ. do Algarve, 1996

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"Memoria premiata dal R. Istituto veneto di scienze, lettere ed arti col premio di fondazione 'Querini-Stampalia'."

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Guaraíras lagoon, located in Tibau do Sul in the eastern littoral of Rio Grande do Norte (Brazil), presents a permanent connection to the sea, which guarantees the occurrence of a rich biodiversity, which includes the autochthonous shrimp species Litopenaeus schmitti, Farfantepenaeus subtilis and Farfantepenaeus brasiliensis. In spite of being subject to a strong human intervention in the last decade, mainly related to the installation of shrimp (Litopenaeus vannamei) farms, the lagoon is still scarcely studied. The present study aims at characterizing the populations of the three autochthonous penaeid shrimp species inhabiting Guaraíras, taking into consideration their abundance and seasonal distribution in the inflow channel of Primar System of Organic Aquaculture (Tibau do Sul, Rio Grande do Norte, Brazil). Twelve monthly samples were carried out from May 2005 to April 2006 with the aid of a circular cast net in the inflow channel, which is daily supplied with water from Guaraíras. Sampling months were grouped in trimesters according to the total pluviosity, thus comprising four trimesters. Water salinity was monitored twice a week and temperature values registered on a daily basis at noon, during the study period. The daily pluviosity data from the municipality of Tibau do Sul were supplied by Empresa de Pesquisa Agropecuária do Rio Grande do Norte (EMPARN). Collected shrimp were identified, weighted, measured and sexed. L. schmitti specimens (0.2 g to 17.8 g) were distributed in 1.3 g weight classes intervals. From the eighth sampling month (December 2005) onwards, males were classified into three categories, in accordance with the development of their petasm: (a) rudimentary petasm, (b) partially formed petasm, and (c) completely formed petasm. Among the ecological variables, rainfall showed the greatest dispersion (s.d.=187.74Rainfall and abundance of L. schmitti were negatively correlated (r = -0.85) whereas its abundance and water salinity were positively correlated (r = 0.63). Among 1,144 collected individuals, 1,127 were L. schmitti, 13 were F. subtilis and 4 were F. brasiliensis, which corresponded to 98.51%, 1.14% and 0.35% of the total of collected individuals. L. schmitti occurred in 100 % of all samples. Differently, the presence of F. subtilis and F. brasiliensis was restricted to 33% and 17% of the collected samples, respectively. The present study confirmed the occurrence of L. schmitti, F. brasiliensis and F. subtilis in Guaraíras. However, this lagoon seems to be primarily inhabited by juvenile Litopenaeus schmitti. The population of L. schmitti analysed showed a seasonal pattern of distribution. In general, in the months of high salinity and absence of rain, the number of individuals was higher than in the wet months. Further studies on the reproductive biology and ecology of L. schmitti, F. brasiliensis and F. subtilis may elucidate questions referring to the abundance, period, and phase of occurrence of these shrimp genera in Guaraíras. Finally, the risks associated to the establishment of L. vannamei in the lagoon provide a novel outlet for studies in this biotope

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

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La presente tesina de licenciatura se propuso caracterizar y analizar las prácticas educativas realizadas con niños y niñas en un taller infantil vinculado a un movimiento social. Específicamente se trató de la experiencia de los talleres realizados en la Biblioteca Popular Juanito Laguna, en el barrio de Villa Argüello, Berisso, durante los años 2005 - 2008. Se trató de un estudio de corte cualitativo, para el que se tomaron nociones de la sistematización de experiencias educativas. En la reconstrucción de la experiencia se utilizaron entrevistas a educadores/as y la revisión de documentos. Se puso especial atención en los fundamentos político-pedagógicos de las prácticas, así como en las concepciones de educador/a y educando/a intentando indagar la relación que tenían con los fundamentos de la educación popular y/o con las prácticas alternativas en educación

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La presente tesina de licenciatura se propuso caracterizar y analizar las prácticas educativas realizadas con niños y niñas en un taller infantil vinculado a un movimiento social. Específicamente se trató de la experiencia de los talleres realizados en la Biblioteca Popular Juanito Laguna, en el barrio de Villa Argüello, Berisso, durante los años 2005 - 2008. Se trató de un estudio de corte cualitativo, para el que se tomaron nociones de la sistematización de experiencias educativas. En la reconstrucción de la experiencia se utilizaron entrevistas a educadores/as y la revisión de documentos. Se puso especial atención en los fundamentos político-pedagógicos de las prácticas, así como en las concepciones de educador/a y educando/a intentando indagar la relación que tenían con los fundamentos de la educación popular y/o con las prácticas alternativas en educación

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Esta tesis de grado se intereza por observar y análizar las red migratoria de los Kichwas de Sesquilé, especificamente en los procesos que permitieron la construcción y consolidación de las redes migratorias, las cuales se encienden o se apagan, a partir de las configuraciones políticas, religiosas, culturales y económicas que la comunidad ha experimentado.

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El principal atractivo turístico de Costa Rica lo constituyen sus recursos naturales; de ahí que en los últimos años se ha presentado el acelerado desarrollo de una serie de proyectos llamados “ecoturísticos”, ejecutados por grandes consorcios, en la mayoría de los casos con el aporte de capital extranjero. El proyecto que se describe en el presente artículo lo ejecutan las comunidades de Cariblanco, Ujarrás y Los Angeles, ubicadas en las zonas aledañas al Refugio Nacional de Vida Silvestre Bosque Alegre. Esta experiencia representa un modelo de desarrollo turístico, que se puede llevar a cabo en otras poblaciones rurales, que cuenten COfl los componentes necesarios para la protección y la conservación de sus recursos naturales, asimismo posibilita la utilización de estos desde una perspectiva de sostenibilidad. El trabajo comunitario se realizó con niños de edad escolar, jóvenes, docentes, líderes comunales y amas de casa. Estos grupos mcta constituyen los verdaderos núcleos de apoyo por medio de los cuales se realizan los diversos subproyectos que se ejecutan en el ámbito del turismo ecológico en el Refugio Nacional de Vida Silvestre Bosque Alegre. Abstract:The main touristic altractive of Costa Rica is its natural resources. For this reason, during the last years there are an accelerate development of ecotouristic project by transnational. The project thai is described in ihis article is carrying out by the Cariblanco, Ujarras and Los Angeles Communities located next to the Wildlife National Refugee of Bosque Alegre. This experiene is a model of tourism development thai can be carrying out in others rural communities thai has the difference component of conservation and preservation of the natural resources. For other hand, it gives the opportunity Lo use and management the natural resources basing in the sustainable approach. The community work was realized with school children, young people, teachers, community leader and housekeepers. Those target groups are (he real people thai support the different activities of the projects that are carry out in to the Wildlife National Refugee of Bosque Alegre.

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Rice grassy stunt virus is a member of the genus Tenuivirus, is persistently transmitted by a brown planthopper, and has occurred in rice plants in South, Southeast, and East Asia (similar to North and South America). We determined the complete nucleotide (nt) sequences of RNAs 1 (9760 nt), 2 (4069 nt), 3 (3127 nt), 4 (2909 nt), 5 (2704 nt), and 6 (2590 nt) of a southern Philippine isolate from South Cotabato and compared them with those of a northern Philippine isolate from Laguna (Toriyama et al., 1997, 1998). The numbers of nucleotides in the terminal untranslated regions and open reading frames were identical between the two isolates except for the 5′ untranslated region of the complementary strand of RNA 4. Overall nucleotide differences between the two isolates were only 0.08% in RNA 1, 0.58% in RNA 4, and 0.26% in RNA 5, whereas they were 2.19% in RNA 2, 8.38% in RNA 3, and 3.63% in RNA 6. In the intergenic regions, the two isolates differed by 9.12% in RNA 2, 11.6% in RNA 3, and 6.86% in RNA 6 with multiple consecutive nucleotide deletion/insertions, whereas they differed by only 0.78% in RNA 4 and 0.34% in RNA 5. The nucleotide variation in the intergenic region of RNA 6 within the South Cotabato isolate was only 0.33%. These differences in accumulation of mutations among individual RNA segments indicate that there was genetic reassortment in the two geographical isolates; RNAs 1, 4, and 5 of the two isolates came from a common ancestor, whereas RNAs 2, 3, and 6 were from two different ancestors.

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We study the problem of allocating stocks to dark pools. We propose and analyze an optimal approach for allocations, if continuous-valued allocations are allowed. We also propose a modification for the case when only integer-valued allocations are possible. We extend the previous work on this problem to adversarial scenarios, while also improving on their results in the iid setup. The resulting algorithms are efficient, and perform well in simulations under stochastic and adversarial inputs.

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Photocopy of family history (70p), includes photocopies of original documents.