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Registros recuperados: 25
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Briozoos cheilostomados del Caribe colombiano OceanDocs
Florez-Romero, P.; Montoya-Cadavid, E.; Reyes-Forero, J.; Santodomingo, N..
El orden Cheilostomatida es el grupo de briozoos marinos vivientes más diverso de la actualidad, siendo común encontrar sus especies en todos los ecosistemas marinos del mundo. Sin embargo, la información del grupo en Colombia es escasa y se restringe a pocas localidades. Con la iniciativa de explorar la biodiversidad de los fondos blandos y complementar los inventarios de fauna marina en Colombia, se llevó a cabo la campaña INVEMAR-Macrofauna II, realizada en marzo de 2001, en la cual se recolectaron muestras a lo largo del Caribe colombiano sobre la plataforma continental y el talud superior entre 20 y 500 m de profundidad. Durante la expedición se encontraron 62 especies de cheilostomados pertenecientes a 39 familias, de las cuales 36 fueron primeros...
Tipo: Journal Contribution Palavras-chave: Biodiversity; Continental shelves; Biodiversity; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_33949; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 2007 URL: http://hdl.handle.net/1834/3478
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Cartographie du Middelkerke Bank: dynamique sédimentaire, structure géologique, facies sédimentaires OMA
Lanckneus, J.; De Moor, G.; Berné, S.; Chamley, H.; De Batist, M.; Henriet, J.-P.; Terwindt, J.; Trentesaux, A..
The paper analyses the first results obtained in the framework of the RESECUSED project (MAST) whose objectives are the detailed analysis of the behaviour of sediments and bedforms of and on the Middelkerke Bank (Belgian Continental Shelf) and the study of the interaction between water movement, sediment transport and bedform mobility. The results include a preliminary analysis of the residual bottom load transport paths deduced from side scan sonar registrations, a map of the sandwaves on the bank, the first grain-size results of the superficial sediment and a study on the internal structure of the bank.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bed forms; Continental shelves; Grain size; Granulometry; Sand waves; Sediment dynamics; Sediment transport; Shelf facies; Side scan sonar.
Ano: 1991 URL: http://www.vliz.be/imisdocs/publications/262327.pdf
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Ciclo anual y variabilidad de baja frecuencia de la temperatura superficial del Mar en el Océano Atlántico Sudoccidental OceanDocs
Martínez Avellaneda, N..
Se estudia el ciclo estacional y la variabilidad de baja frecuencia en el Oceano Atlantico SO, analizando 15 anos (ene.1985-dic. 1999)de observaciones satelitales de temperatura superficial del mar (TSM). Los campos de la TSM tienen una resolucion temporal de 2 dias y espacial de 18km y fueron derivados de observaciones del sensor Advanced Very High Resolution Radiometer de la National Oceanic and Atmospheric Administration (NOAA, EEUU). Se realizo un ajuste con una regresion de cuadrados minimos para los armonicos anual y semianual. Los ajustes para todos los puntos de grilla del area de estudio contabilizaron entre el 70. Y el 95 de la variabilidad de la TSM, dependiendo de la region. La amplitud estimada del ciclo estacional varia entre 5 degree C y...
Tipo: Theses and Dissertations Palavras-chave: Annual variations; Continental shelves; Seasonal variations; Surface temperature; Satellite sensing; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 2005 URL: http://hdl.handle.net/1834/2828
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Climatología de los frentes de marea en la Plataforma Continental y su rol en los flujos mar-atmósfera de CO2 OceanDocs
Bianucci, L..
En este trabajo se caracterizaron los frentes de marea en la Plataforma Continental Argentina al sur de 40°S y los flujos de CO2 entre el mar y la atmósfera en la región, analizándose su relación con dichos frentes. Los frentes de marea separan aguas costeras cuasi-homogéneas de aguas estratificadas de la plataforma media. La zona costera se homogeneiza por la mezcla vertical producida por fricción de las energéticas corrientes de marea que se dan en la región. La plataforma media se encuentra estratificada en verano debido al calentamiento superficial del mar, presentando una termoclina estacional bien desarrollada. La mezcla vertical a cada lado de los frentes y los movimientos verticales en la zona frontal afectan a la producción primaria y a los flujos...
Tipo: Theses and Dissertations Palavras-chave: Fronts; Atmospheric fronts; Continental shelves; Air-sea interaction; Climatology; Tidal flow; Seasonal distribution; Climatology; Continental shelves.
Ano: 2004 URL: http://hdl.handle.net/1834/3856
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Coral bank obstructions to trawling in the middle to outer continental shelf east and west of Lagos. OceanDocs
Awosika, L.F..
The continental shelf east and west of Lagos [long.2o.04.00E to long.4o 00’.00”E] is narrow shelf ranging in width between 25 to 30 kilometers. Echograms from several NIOMR’s cruises reveal the presence of some isolated and in some cases continuous bands of dead Holocene coral banks, within the middle to outer continental shelf [40-120m depth]. The most prominent of these structures are ones occurring between 75-100m of water and running almost parallel to the coastline. The dead coral structures are non-reef forms. They are found either as continuous Bands of rough bottom with width ranging between, 100 to 3,500m or in isolated pinnacled shapes. The pinnacled forms reach heights of over 7 meters in some cases. These coral structures pose obstructions to...
Tipo: Report Palavras-chave: Coral reefs; Continental shelves; Coral reefs; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1990 URL: http://hdl.handle.net/1834/2381
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Corrientes en la plataforma continental OceanDocs
Piola, A.R.; Rivas, A..
In this chapter the main features of the currents on the Argentine continental shelf are described. Due to the scarcity of direct current observations, adequate to resolve the mean flow, the circulation of the continental shelf is studied based on property distributions and models. These analyses indicate that the mean flowover the continental shelf varies between 1 and 2 Sverdrups (1Sverdrup = 1x106 m3 s-1)towards the NNE. A synthesis of results of studies of higher frequency motions is also presented. The most relevant results derived from long term direct current observations on the continental shelf near 43°S are discussed. The mean current velocities in the inner and mid-shelf regions vary between 0,05 and 0,10 m/s towards the NNE, in agreement with...
Tipo: Book Section Palavras-chave: Continental shelves; Ocean currents; Ocean circulation; Physical oceanography; Ocean currents; Physical oceanography; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_12883; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1997 URL: http://hdl.handle.net/1834/1704
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Descripción morfológica de la plataforma continental del Ecuador y análisis comparativo con la plataforma jurídica mediante la aplicación de Sistemas de Información Geográfica OceanDocs
Martillo, C.; Pazmiño, A.; Chunga, K.; Resl, R..
El presente estudio realiza un análisis morfoestructural de las plataformas que están en el territorio marìtimo ecuatoriano:(1)La Plataforma de las Islas Galápagos que es producto de la interacción entre el Punto Caliente de Galápagos y el Centro de Divergencia de Galápagos, y (2) La Plataforma Continental del Ecuador continental localizada en un margen activo convergente entre la placa oceánica de Nazca y los segmentos continental de la placa Sudamericana y del Bloque Norandino. Mediante el uso de Sistemas de Información Geográfica (SIG) y Modelos Digitales de Terreno (MDT), se caracterizó morfológicamente la proyección de la plataforma continental hacia el segmento marino, para luego realizar una confrontación entre el área que incluye la plataforma...
Tipo: Journal Contribution Palavras-chave: Marine geology; Coastal morphology; Continental shelves; GIS; Law of the sea.
Ano: 2010 URL: http://hdl.handle.net/1834/4218
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Distribución de esponjas sobre la plataforma continental de la Guajira, Caribe colombiano. OceanDocs
Díaz, M.; Zea, S..
Durante la exploración de los fondos blandos calcáreos de la plataforma continental del departamento de La Guajira se identificaron 47 especies de esponjas de las clases Demospongiae y Calcarea. A partir de arrastres de fondo a lo largo de la plataforma continental sobre las franjas batimétricas de 10 y 50 m, se encontró que el número de especies es mayor a 50 m de profundidad, principalmente en áreas al norte y sur del departamento donde resaltan sedimentos tipo arena-lodo. Sin embargo, estos esquemas no son consistentes en todos los casos de acuerdo con las bajas similitudes basadas en la presencia-ausencia de esponjas, indicando una composición faunística muy heterogénea. Los fondos blandos permiten el crecimiento de esponjas sésiles y no sésiles,...
Tipo: Journal Contribution Palavras-chave: Sponges; Continental shelves; Distribution; Distribution; Sponges; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_7321; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 2008 URL: http://hdl.handle.net/1834/3488
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Distribución del fitoplancton frente a la costa del Ecuador durante noviembre 1995 OceanDocs
Coello, D..
During the oceanographic cruises (T95/10/04 DO, B/I Tohalli) which were carried out during the period between the 2nd-6nd of november 1995, along the from the coast at 81~'20'W and between 01~'10' to 03~'20'S, 17 differents phytoplankton station, were surveyed for each station vertical drags were done in a water colum of 50 m depth by using of 47,5 cm diameter, 130 cm long and 55~km of light ned. The cualitative and quantitative plankton analysis shown that the studied area correspond to biological fertility region with Rhizosolenia styliformis, Coscinodiscus marginatus an Ceratium tripos as the dominant spacies. An area of phytoplankton activity is identifie as of having an outcrop origine (station 7, 8 and 9). The station that presented the major...
Tipo: Journal Contribution Palavras-chave: Phytoplankton; Geographical distribution; Continental shelves; Phytoplankton; Geographical distribution; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1996 URL: http://hdl.handle.net/1834/2968
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Distribución y abundancia de los recursos demersales en la plataforma continental del Ecuador durante octubre de 1995 OceanDocs
Revelo, W..
The demersal phase (from 18th to November 01th, 1995) of cruise T95/10/04 DO, covered an area of 15632,6 km2 between 00º36'0”N-80º34'3”O and 03º22'8”S-80º49'5”O, of the Ecuadorian Continental Plataform, the depth range from 14 to 115 meters. 120 species were recorded, divided into 85 osseous fish species, three sharks, 11 ray, 18 crustaceans, two molluscan and one holothurid (sea cucumber). Total biomass was estimated as 95297,5 t; with 97,3% of this biomass distributed between 01º00'0”S and 03º23'S. The most abundant species were: barriga juma (Larimus spp) (11153 t), corvina (Cynoscion spp) (4523 t), gallineta (Prionotus spp) (55651 t), perela (Palabrax callaensis) (3774 t) and ravi junco (Centrithmus signifer) (2407 t).
Tipo: Journal Contribution Palavras-chave: Fishery resources; Demersal fisheries; Continental shelves; Abundance; Geographical distribution; Demersal fisheries; Geographical distribution; Fishery resources; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1996 URL: http://hdl.handle.net/1834/2970
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Diversidad de macroinvertebrados en la plataforma continental de Ecuador OceanDocs
Mora, E.; Jurado, V.; Mendívez, W..
Se analizaron los datos de pesca obtenidos en cuatro cruceros de investigación realizados por el B/I ”Tohalli” del Instituto Nacional de Pesca, durante los años 2003, 2005, 2006 y 2007 frente a la costa ecuatoriana, entre las latitudes 03~' 20'S y 00~' 45' N. Se estudió la riqueza y diversidad de especies de la fauna de macroinverterbrados bentónicos, su distribución por subáreas (A, B, C, D)y por estratos de profundidad. 10-30 m, 31-80 m y 81-200 m. Se identificaron 150 especies: 120 crustáceos, 15 moluscos, 13 equinodermos y dos cnidarios. La diversidad media estimada (H') del número de especies fue de moderada a baja (2,58; 1,86; 2,50 y 1,26) para los cuatro cruceros, respectivamente. La mayor riqueza de especies e índices de diversidad con valores más...
Tipo: Journal Contribution Palavras-chave: Benthos; Species diversity; Continental shelves.
Ano: 2010 URL: http://hdl.handle.net/1834/5389
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El ecosistema de la plataforma patagónica austral, marzo-abril 2000. Composición, abundancia y distribución del zooplancton. OceanDocs
Sabatini, M..
The abundance, distribution and structure of the zooplankton community in southern Patagonia (SW Atlantic Ocean) were studied during late summer (March-April 2000) from samples obtained with Nackthai (390 ~km) and Multinet (150 ~km) samplers. Total concentrations of zooplankton biomass, integrated in the water column, ranged between 1.0 and 14.5 g m-2 (dry weight) and reached the highest values in the mid and outer shelf off Bahía Grande (Santa Cruz Prov., Argentina) (51~'S). The < 5 mm size fraction, composed mainly of copepods represented, on average, 45% of the total; amphipods and euphausiids accounted for 20% and 31%, respectively. Amphipods were, almost exclusively, Themisto gaudichaudii and euphausiids most abundant species Euphausia lucens and...
Tipo: Journal Contribution Palavras-chave: Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 2008 URL: http://hdl.handle.net/1834/3142
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El Ecuador y la Convención de las Naciones Unidas sobre el Derecho del Mar OceanDocs
De la Torre, G..
La Convención de las Naciones Unidas sobre el Derecho del Mar (CONVEMAR) ha sido catalogada como uno de los logros más significativo en materia de derecho internacional, constituyéndose en la actualidad en una verdadera "constitución para los océanos" que norma con carácter positivo todos los aspectos relacionados con el mar. La CONVEMAR establece y define por primera vez espacios marítimos perfectamente delimitados como: Aguas Interiores, el Mar Territorial, la Zona Contigua, la Zona Económica Exclusiva (ZEE), y la Alta Mar, normando los aspectos relacionados con su jurisdicción y soberanía, así como la exploración y explotación de sus recursos naturales. De igual manera, esta Convención abarca aspectos trascendentales relacionados con la protección y...
Tipo: Journal Contribution Palavras-chave: Law of the sea; Territorial waters; Ocean space; Exclusive economic zone; Continental shelves; Territorial waters; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_7677; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 2006 URL: http://hdl.handle.net/1834/2332
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El fondo marino OceanDocs
Parker, G.; Paterlini, M.C.; Violante, R..
A synthesis is given of the present knowledge of the topographic and sediment characters of the sea floor of the Argentine Sea. After considering some general characters of passive continental margins the Argentine characteristics are described. Various 'physiographic provinces' are differentiated. The corresponding to the continental shelf is the most extensive on its several 'terraces' associated with Plio-Pleistocene sea level changes. Soft sediments are dominant,mainly being composed of sand with minor but varied quantities of shells and mud. Harder bottoms, composed of loose gravel and rocky outcrops are also present. The information presented here is not sufficient for evaluating the natural resources of the Argentine Sea or for solving sovereignty...
Tipo: Book Section Palavras-chave: Continental shelves; Bottom topography; Sediment distribution; Topographic maps; Ocean floor; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1997 URL: http://hdl.handle.net/1834/1720
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Estimaciones satelitales de clorofila y los frentes oceánicos del Atlántico Sudoccidental OceanDocs
Romero, S.I..
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales (Argentina)
Tipo: Theses and Dissertations Palavras-chave: Chlorophylls; Continental shelves; Shelf fronts; Estuarine front; Shelf edge fronts; Variability; Phytoplankton; Photosynthesis; Satellite sensing; Phytoplankton; Chlorophylls; Continental shelves; Photosynthesis; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_32413; Http://aims.fao.org/aos/agrovoc/c_5812.
Ano: 2008 URL: http://hdl.handle.net/1834/2827
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Evaluación acústica de recursos pesqueros pelágicos frente a la costa sur ecuatoriana durante septiembre de 1995 OceanDocs
Chalen, X.; Vicuña, H..
Nineteen lightday rectangular transects were made 16 in the area of the Gulf of Guayaquil (Ecuador), and 3 in an oceanic area at the west of the Gulf of Guayaquil, this was the second part of research cruise, oriented to the evaluation of the small pelagic fish stocks, it was made between september 14th and 27th, 1995. The SIMRAD EK-500 acoustic system was used, installed on board of the National Research Institute (INP) R/V Tohallí. At the same time, people from the INP's Fisheries Observer Program were on four private enterprises vessels, while they were fishing in the same Gulf's area. They also made the biological sample of the commercial catch, for future relation with the results from the acoustic evaluation. The V/R Tohallí principal catch was jack...
Tipo: Journal Contribution Palavras-chave: Geographical distribution; Abundance; Demersal fisheries; Fishery resources; Continental shelves; Echo surveys; Geographical distribution; Demersal fisheries; Fishery resources; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1996 URL: http://hdl.handle.net/1834/2962
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Évolution récente et sédimentation des plates-formes continentales de la Corse ArchiMer
Pluquet, Fabrice.
This work aimed at displaying and studying morphological and sedimentological features of Corsican seafloor from the coast to depths of -100m. It also aimed at a better knowledge of sediment dynamics under hydrodynamic conditions, and at a reconstitution of the late Quaternary shorelines evolution. Careful analysis of the bathymetry has revealed a very contrasted morphology between the different areas of Corsican shelves, as it has been displayed on an synthetic geomorphological map. In addition, an homogeneous and overall map of surficial sediments of the Corsican shelves seabed was established and two areas, the Balagne and Agriates' platforms to the North of Corsica, and the Bonifacio Straits to the South, were mapped into details. The various...
Tipo: Text Palavras-chave: Fossil shoreline; Late Quaternary; Habitats mapping; Sidescan sonar; Hydrodynamism; Sédimentology; Morphology; Bathymetry; Continental shelves; Corsica; Geosciences; Paléo rivage; Quaternaire récent; Cartographie d'habitats; Sonar latéral; Hydrodynamisme; Sédimentologie; Morphologie; Bathymétrie; Plates formes continentales; Corse; Géosciences.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-3363.pdf
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Los recursos demersales de la Plataforma Continental del Ecuador. Parte dos. Producción potencial y recomendaciones para la utilización del recurso de pesca blanca en el Ecuador OceanDocs
Herdson, D.; Rodríguez, W.; Martínez, J..
The stock estimates obtained during the demersal fish resources survey in 1980-1985 were used to estimate the potential yields of demersal stocks of the Ecuadorian Continental Shelf. The difficulties of predicting yields for multispecies fisheries are discussed and modified version of the Gulland model was adopted. The potential realizable yields for multispecies fisheries are discussed and a modified version of the Gulland model was adopted. The potential realizable yield was calculated to be between 15,000 t and 20,000 t per year, of which 2,000 t is good quality fish, 5,000 t per year of small and medium fish and 8,000 t of gurnards. The majority of these resources are at present being fished at around their optimum levels and any further developments...
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Continental shelves; Yield predictions; Exploitation; Demersal fisheries; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1985 URL: http://hdl.handle.net/1834/3227
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Masas de agua en la plataforma continental OceanDocs
Guerrero, R.A.; Piola, A.R..
The current knowledge on the argentine continental shelf water masses is summarized in this paper. These water masses are characterized as a function of water types fed by the boundary currents and the modifications due to continental runoff, and water energy exchange with the atmosphere. Based on sea surface salinity distributions and the temperature-salinity characteristics, three masses are described: coastal waters, mid-shelf waters and slope waters. The main freshwater sources found along the coast are identified, as well as high salinity formation areas. The vertical stratification, mainly controlled by temperature, is analyzed along the annual cycle. The stratification cycle is mainly driven by the heat exchange between the atmosphere and the ocean....
Tipo: Book Section Palavras-chave: Continental shelves; Water masses; Hydrography; Water circulation; Oceanic fronts; Stratification; Water circulation; Stratification; Hydrography; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_8314; Http://aims.fao.org/aos/agrovoc/c_7438; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1997 URL: http://hdl.handle.net/1834/1703
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Modeles mathematiques de courants residuels sur le plateau continental nord europeen ArchiMer
Djenidi, S; Nihoul, J; Ronday, F; Garnier, Antonin.
To study residual currents the authors use mathematical models. The introduction deals with parameters having an influence on this process in the North sea and adjacent seas (shallow environments): tidal residual circulation, limit conditions and winds. Several maps give a representation of results.
Tipo: Text Palavras-chave: Tidal currents; Wind driven circulation; Boundary conditions; Mathematical models; Continental shelves; Residual flow.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1270.pdf
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