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| Registros recuperados: 364 | |
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| Abdalazeez, Ahmed. |
| The aim of this study is to estimate the wave runup on selected beaches around the northern Indian Ocean. The runup has been estimated using ERA-Interim, which is the latest global atmospheric re-analysis produced by the European Center for Medium-Range Weather Forecasts (ECMWF). ECMWF uses the global Wave Model (WAM) model to calculate two dimensional wave spectra. The distances between the model grid points and the beaches have been calculated by a great circle calculator. The beach slopes have been calculated by Google Earth for all locations, except Maldives beach, which was assumed as an imaginary beach because the method of calculating the slope could not be used there. The significant wave height as well as the peak wave period at the grid points... |
| Tipo: Theses and Dissertations |
Palavras-chave: Wave runup. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4557 |
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| Abdennadher, M.. |
| Cette thèse a pour objectif principal la caractérisation taxonomique, physiologique et écologique d’espèces de dinoflagellés associées à des alertes de toxicité dans le golfe de Gabès à savoir : Alexandrium minutum, Prorocentrum lima, Coolia monotis et Ostreopsis ovata. L’optimisation des conditions de culture des espèces de dinoflagellés et la mise en place d’une phytothèque composée d’une collection de cultures de microalgues toxiques étaient notre priorité dans cette investigation. Une analyse de la base des données REPHY a été effectuée dans le cadre de cette thèse. L’étude taxonomique moyennant la microscopie électronique en transmission et à balayage nous a permis de déceler les importantes caractéristiques morphologiques de distinction pour chaque... |
| Tipo: Theses and Dissertations |
Palavras-chave: Physiology; Taxonomy; Ecology; Phytoplankton culture. |
| Ano: 2014 |
URL: http://hdl.handle.net/1834/5924 |
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| Adam, Adel Mohamed Saleh. |
| The present study deals with the fisheries of two Sparid fish species in Abu Qir Bay. Family Sparidae represents about 17 % of the landed catch from the Bay. Among the family; genus Diplodus is generally caught by trammel nets, beach and purse seines but mostly by longlines. Two species of this genus were considered here for study. They are namely D. sargus and D. vulgaris where they represent by about 4.2% of the landed catch during the year 2008 in the Bay (GAFRD, 2008). The length weight relationship of both species under study showed a value of exponent “b” of very slight negative allometry. Analysis of the catch length structure of the two species revealed that the catch of D. sargus is composed of 21 length groups, the least length was 7.5 cm and the... |
| Tipo: Theses and Dissertations |
Palavras-chave: Stock assessment. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/5091 |
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| Adjoussi, P.. |
| RESUME L'introduction dans tout système climatique, d'un changement au niveau des éléments de base régissant le grand complexe climatique induit d'énormes modifications dans les traits d'ensemble du climat. Partant de cette hypothèse et des techniques utilisées en statistique descriptive, des moyennes régionales ont été calculées afin de définir les comportements normaux des paramètres, avant l'analyse ou l'évaluation de leur comportement évolutif. Le découpage climatique laisse ressortir six régions, obtenues à partir des températures moyennes annuelles et des hauteurs d'eau annuelles diversement enregistrées sur le territoire, avec chacune une certaine particularité que régissent, dans l'ensemble, les centres d'action de la circulation atmosphérique... |
| Tipo: Theses and Dissertations |
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| Ano: 2000 |
URL: http://hdl.handle.net/1834/2754 |
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| Adjoussi, P.. |
| RESUME L'introduction dans tout système climatique, d'un changement au niveau des éléments de base régissant le grand complexe climatique induit d'énormes modifications dans les traits d'ensemble du climat. Partant de cette hypothèse et des techniques utilisées en statistique descriptive, des moyennes régionales ont été calculées afin de définir les comportements normaux des paramètres, avant l'analyse ou l'évaluation de leur comportement évolutif. Le découpage climatique laisse ressortir six régions, obtenues à partir des températures moyennes annuelles et des hauteurs d'eau annuelles diversement enregistrées sur le territoire, avec chacune une certaine particularité que régissent, dans l'ensemble, les centres d'action de la circulation atmosphérique... |
| Tipo: Theses and Dissertations |
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| Ano: 2000 |
URL: http://hdl.handle.net/1834/2754 |
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| Ahmed, Mohammed Elamin Bashir Hassan. |
| Although the understanding of the oceanography of the Red Sea has been developed over the last few decades, but we still have a little knowledge about the influences of the physical factors on the phytoplankton activity. The purpose of the present study was initially to quantify and investigate the seasonal variation of surface chlorophyll concentration (CHL-a) at three zones in the Red Sea (north, middle and south). The second goal is to identify the controlling factors which seem to have an effect on the phytoplankton bloom during the same period of the study. To reach our goals, we use remote sensing data (surface chlorophyll, sea surface temperature and photosynthetically available radiation), oceanographic data (wind speed), and modeling data (mixed... |
| Tipo: Theses and Dissertations |
Palavras-chave: Chlorophylls. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5083 |
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| Ali, Aasim. |
| Red Sea water samples were collected from four stations in the Sudanese coast at depth of 10 m during July 2011 and analyzed for major ions and trace metals in order to determine their insitu concentration, their distribution patterns, and level of heavy metals contamination in the Sudanese coastal water. The data of the analysis was used in the preparation of the Red Sea artificial water which was used to study how salinity affects the photooxidation of 1,8-dimethylnaphthalene (1,8-DMN) and the water-soluble fraction (WSF) from Norwegian crude oil. The results show a small range of spatial variation for Na+, Mg2+, Ca2+, Cl−, K+, and SO2−4 . Also, the concentration of Na+, Mg2+, Ca2+, Cl−, and SO2−4 in the Sudanese coastal water is high compared to all... |
| Tipo: Theses and Dissertations |
Palavras-chave: Trace metals; Salinity effects. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4624 |
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| Ali, Aasim. |
| Red Sea water samples were collected from the Sudanese coast at depths of 10 meter during June 2011 and analyzed for major and trace metals in addition to some inorganic anions. Sodium Na, potassium K, strontium Sr, magnesium Mg, calcium Ca, sulfur S, iron Fe, zinc Zn, manganese Mn, nickel Ni, copper Cu, cadmium Cd, cobalt Co, lead Pb, arsenic As, barium Ba, chromium Cr, europium Eu, lanthanum La, silicon Si, and titanium Ti were analyzed using inductively coupled plasma optical emission spectroscopy (ICP-OES) to determine their existing concentration, their distribution patterns, study the level of contamination in the Red Sea Sudanese coastal water, and the data of the analysis was used in the preparation of the Red Sea arti cial water which was used in... |
| Tipo: Theses and Dissertations |
Palavras-chave: Trace metals. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4555 |
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| Ali, Elsheikh Bashir. |
| The inorganic carbon cycle in the Red Sea has been examined based on various datasets from six different years during the period 1977 and 2007. The study has been performed parameter wise, and the processes biological production/remineralization (soft tissue and hard parts), calcium carbonate sedimentation, air-sea gas exchange, and evaporation/precipitation have been considered. The surface water was relatively warm in the central part of the Red Sea due to wind convergence, and colder towards the south and north due to influence of relative cold Gulf of Aden water and net evaporation, respectively. The surface salinity increased all the way from the south towards the north, due to evaporation, and this explained the major part of the northwards... |
| Tipo: Theses and Dissertations |
Palavras-chave: Inorganic carbon. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5076 |
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| Alonso, R.. |
| El presente estudio se llevó a cabo con el propósito de conocer algunas de las condiciones hidrológicas y ambientales presentes durante la formación, el desarrollo y la terminación de eventos de “marea roja” en la temporada invierno-primavera en la bahía de Mazatlán, ello con el interés de explicar su origen. Los cambios de temperatura y salinidad a mediados de marzo del 2000, provocaron el aumento de la densidad del agua (-t) de manera significativa, coincidiendo con el inicio de la temporada de “mareas rojas” en el período de estudio. Las condiciones hidrológicas, durante el desarrollo de estos eventos, estuvieron enmarcadas por condiciones de alta estratificación de la columna de agua, lo cual fue corroborado por la aplicación de varios índices que... |
| Tipo: Theses and Dissertations |
Palavras-chave: 972; Red tides; Environmental conditions; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_32980. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/3446 |
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| Alvarez Alemán, A. |
| Se estudió la población del manatí antillano (Trichechus manatus) presente en la Ensenada de la Siguanea. Se colectó información acerca de los avistamientos de la especie, tamaño de los grupos, conductas, composición de la dieta y amenazas potenciales. Además se realizó la caracterización de sushábitats principales. Se utilizaron diversas metodologías que incluyeron muestreos en botes, a partir de recorridos y desde estaciones fijas, colecta e identificación de especies vegetales, colecta y análisis de material fecal y entrevistas a pescadores. Se determinó que la zona de estudio presenta un conjunto de características adecuadas para la supervivencia de la especie, como disponibilidad de alimento, temperatura del agua apropiada, fuentes de agua dulce,... |
| Tipo: Theses and Dissertations |
Palavras-chave: Habitat selection; Conservation; Aquaculture. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/5697 |
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| Álvarez Capote, J.S.. |
| Considering the need to help the Cuban shrimp culture industry remain profitable, and the impact that feeding has on production costs, a research series was designed to evaluate new formulations that improve white shrimp Litopenaeus schmitti growth and reduce feeding costs. Five completely randomized experiments with 3 replicates per treatment were conducted. Juveniles (0.2-0.5 g) from the experimental farm were used. Trials were conducted at the Centro de Obtención y Cría de Larvas de Santa Cruz del Sur, Camaguey, and the Complejo Camaronero de Tunas de Zaza, Sancti Spiritus. In the first trial, 40-l plastic experimental units with 10 shrimp/unit were used to test the response of L. schmitti to the partial and total substitution (46, 59, 75, 88 y 100%) of... |
| Tipo: Theses and Dissertations |
Palavras-chave: Feeding; Nutrition; Fish meal; Feeding; Nutrition; Fish meal; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_49892; Http://aims.fao.org/aos/agrovoc/c_2925. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1548 |
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| Registros recuperados: 364 | |
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