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Registros recuperados: 31
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Análisis espacio-temporal del estado nutricional de larvas de anchoíta Engraulis anchoita. Relación con las características hidrográficas y la disponibilidad de alimento OceanDocs
Díaz, M.V..
Nutritional condition studies allow the assessment of physiological state of each larva and thus, the establishment of favourable nursery areas which provide better survival and growth. In the present work, morphometrical, histological and biochemical techniques were employed to assess nutritional condition of anchovy, Engraulis anchoita, larvae captured in the Argentine Sea. Its results were complemented with oceanographic data and information about zooplankton abundances, both prey and predators of anchovy larvae. Anchovy larvae abundance and distribution would be mainly determined by physico-chemical variables. Even though no significant differences were found in larval nutritional condition among the studied areas, larval condition was slightly better...
Tipo: Theses and Dissertations Palavras-chave: Fish larvae; Nutritional requirements; Morphometry; Histology; Hydrography; Nursery grounds; Fish larvae; Nutritional requirements; Hydrography; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5277; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2010 URL: http://hdl.handle.net/1834/3548
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Bibliografia de recursos naturais da Amazônia brasileira. Infoteca-e
LOPES, A. de S. A.; PEREIRA, I. C. V..
Tipo: Livros Palavras-chave: Natural resource; Ecosystem; Hydrography; Fishery; Energetic resource; Navigation; Climatologia; Ecossistema; Hidrografia; Hidrologia; Limnologia; Navegação; Meteorologia; Pesca; Recurso Natural; Recurso Energético; Solo; Climatology; Amazonia; Hydrology; Meteorology; Soil.
Ano: 1984 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/373224
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Bottom water throughflows at the Rio de Janeiro and Rio Grande Fracture Zones ArchiMer
Mercier, Herle; Weatherly, Georges; Arhan, Michel.
Bottom water throughflows at the Rio de Janeiro Fracture Zone (22 degrees S) and Rio Grande Fracture Zone (26 degrees S) of the Mid-Atlantic Ridge are identified from hydrographic anomalies observed along 9 degrees W in the Angola Basin. The throughflow water is supplied by a meridional band of cold and fresh water lying against the western flank of the Ridge.
Tipo: Text Palavras-chave: Fractures and faults; Structural geology; Hydrography; General circulation; Physical oceanography.
Ano: 2000 URL: https://archimer.ifremer.fr/doc/2000/publication-491.pdf
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Caracterização geo-ambiental do município de Carica (SE). Infoteca-e
RICHE, G. R.; MANTOVANI, L. E..
Trata sobre o municipio de Carica (SE): localizacao, extensao, populacao, clima, geologia, vegetacao, relevo, hidrografia, as unidades geo-ambientais, as grandes unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe.
Tipo: Folhetos Palavras-chave: Localizacao; Extensao; Sergipe; Carira; Relievo; Hydrography; Localization; Extension; Solo; Clima; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Climate; Ecology; Geology; Brazil; Population; Soil; Vegetation.
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133056
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Caracterização geo-ambiental do município de Poço Redondo - SE. Infoteca-e
RICHE, G. R.; MANTOVANI, L. E..
Trata sobre o municipio de Poco Redondo (SE): localizacao, extensao, populacao, clima, geologia, vegetacao, relevo, hidrografia, as unidades geo-ambientais, as grande unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe.
Tipo: Folhetos Palavras-chave: Localizacao; Extensao; Sergipe; Poco Redondo; Relievo; Hydrography; Localization; Extension; Solo; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Soil; Ecology; Geology; Brazil; Population; Vegetation.
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133055
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Caracterizacao geo-ambiental do município de Ribeirópolis (SE). Infoteca-e
RICHE, G. R.; MANTOVANI, L. E..
Trata sobre o Municipio de Ribeiropolis (SE). Traz a localizacao, extensao, populacao, clima, geologia, vegetacao, relevo , hidrografia, as unidades geo-ambientais, as grandes unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe.
Tipo: Folhetos Palavras-chave: Extensao; Localizacao; Sergipe; Ribeiropolis; Extension; Localization; Relievo; Hydrography; Solo; Clima; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Soil; Climate; Ecology; Geology; Brazil; Population; Vegetation.
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133057
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Deep lenses of circumpolar water in the Argentine Basin - art. no. 3007 ArchiMer
Arhan, Michel; Carton, Xavier; Piola, A; Zenk, W.
[1] Three deep anticyclonic eddies of a species only reported once before [Gordon and Greengrove, 1986] were intersected by hydrographic lines of the World Ocean Circulation Experiment (WOCE) and South Atlantic Ventilation Experiment (SAVE) programs in the Argentine Basin. The vortices are centered near 3500 m depth at the interface between North Atlantic Deep Water and Bottom Water. They have similar to1500-m-thick cores containing Lower Circumpolar Deep Water and a dynamical influence that may span up to two thirds of the water column. As one eddy was observed just downstream of the western termination of the Falkland Escarpment, a destabilization of the deep boundary current by the sudden slope relaxation is suggested as a potential cause of eddy...
Tipo: Text Palavras-chave: Eddies and mesoscale processes; Western boundary currents; Hydrography.
Ano: 2002 URL: https://archimer.ifremer.fr/doc/00000/10057/7797.pdf
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Ecological and fisheries development of Lake Manzalah (Egypt): hydrography and chemistry of Lake Manzalah OceanDocs
Shakweer, L..
Lake Manzalah; the largest delta Lake in Egypt represents a dynamic system that has been undergoing continuous and pronounced changes since long times. In the last year’s this Lake faced drastic problems that retarded its environmental and fisheries development; the most serious one is the discharge of waste water. It is attempted in the present study to investigate the chemical characters of Lake Manzalah water during 2001-2002. Water temperature ranged from an average of 12.35oC in January and 29.14oC in July. Dissolved Oxygen, pH and total dissolved solids were found in ranges optimum for the living of marine and freshwater fish species. The average concentrations of nutrients lied in the following ranges: 1.24 to 4.89 μmol PO4 -3 l-1 , 5.08 to 28.73...
Tipo: Journal Contribution Palavras-chave: Hydrography; Water; Chemistry Chemical composition Environments Water content Fisheries Chemical composition Water content Environment http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_15852 http://aims.fao.org/aos/agrovoc/c_2593.
Ano: 2005 URL: http://hdl.handle.net/1834/1250
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El rol del frente de mareas de Península Valdés en el control de la comunidad zooplanctónica OceanDocs
Derisio, C..
The Península Valdés tidal front was studied in its rol in the control of the spatial distribution, abundance, assemblages, diversity and life histories of the zooplankton community using samples from two oceanographic surveys. Although the front showed in general high zooplankton abundances, highest values, mainly due to the presence of immature stages of copepods, were recorded in the transitional and stratified zones coinciding with highest values of chlorophyll a. The zooplankton groups showed a distinctive spatial distribution across the front. The results showed that this front did not exert any control on zooplankton composition and diversity, but did on the abundance. In the homogeneous zone the harpacticoid copepods were more abundant, followed by...
Tipo: Theses and Dissertations Palavras-chave: Zooplankton; Ecological associations; Oceanic fronts; Abundance; Species diversity; Hydrography; Vertical migrations; Copepoda; Cladocera; Marine environment.
Ano: 2012 URL: http://hdl.handle.net/1834/4777
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Estimates of the Southern Ocean general circulation improved by animal-borne instruments ArchiMer
Roquet, Fabien; Wunsch, Carl; Forget, Gael; Heimbach, Patrick; Guinet, Christophe; Reverdin, Gilles; Charrassin, Jean-benoit; Bailleul, Frederic; Costa, Daniel P.; Huckstadt, Luis A.; Goetz, Kimberly T.; Kovacs, Kit M.; Lydersen, Christian; Biuw, Martin; Nost, Ole A.; Bornemann, Horst; Ploetz, Joachim; Bester, Marthan N.; Mcintyre, Trevor; Muelbert, Monica C.; Hindell, Mark A.; Mcmahon, Clive R.; Williams, Guy; Harcourt, Robert; Field, Iain C.; Chafik, Leon; Nicholls, Keith W.; Boehme, Lars; Fedak, Mike A..
Over the last decade, several hundred seals have been equipped with conductivity-temperature-depth sensors in the Southern Ocean for both biological and physical oceanographic studies. A calibrated collection of seal-derived hydrographic data is now available, consisting of more than 165,000 profiles. The value of these hydrographic data within the existing Southern Ocean observing system is demonstrated herein by conducting two state estimation experiments, differing only in the use or not of seal data to constrain the system. Including seal-derived data substantially modifies the estimated surface mixed-layer properties and circulation patterns within and south of the Antarctic Circumpolar Current. Agreement with independent satellite observations of sea...
Tipo: Text Palavras-chave: Animal-borne sampling; Southern Ocean; State estimation; Hydrography.
Ano: 2013 URL: https://archimer.ifremer.fr/doc/00241/35252/33765.pdf
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Estrategias de vida de los copépodos Drepanopus forcipatus y Calanus australis en relación con los recursos tróficos en la plataforma patagónica austral (Argentina, 47°- 55°S) OceanDocs
Antacli, J.C..
This Thesis contributes to elucidate the life cycle strategies of two copepod species, the medium-size clausocalanid Drepanopus forcipatus Giesbrecht, 1888 and the large calanid Calanus australis Brodsky, 1959, in relation to the environmental conditions in the southern Patagonian shelf (47°-55°S). This research was mainly carried out with samples collected in late summer/early autumn (March/April, 2004) onboard RV "Dr. E. L. Holmberg" (INIDEP, Mar del Plata). An additional sampling performed during early spring (October, 2005) with RV "Puerto Deseado" (CONICET) was also utilized. The present study was based on the following research questions: 1) Which is the available food for copepod populations by late summer? 2) Which is the relative contribution of...
Tipo: Theses and Dissertations Palavras-chave: Zooplankton; Trophic levels; Population structure; Hydrography; Community composition.
Ano: 2011 URL: http://hdl.handle.net/1834/4205
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¿Existen variaciones interanuales en el crecimiento larval de anchoíta bonaerense (Engraulis anchoita)? OceanDocs
Barretto, A.C.; Chandler, D.E.; Gómez, M.I..
Se determinaron las tasas de crecimiento de larvas de la anchoíta argentina (Engraulis anchoíta) provenientes de la plataforma bonaerense, contando y midiendo incrementos diarios en sus otolitos sagitta. Las larvas se capturaron en diferentes años y durante diferentes épocas (otoño de 1999; invierno de 2000 y primavera de 2002, 2003 y 2004)a los fines de analizar diferencias interanuales en el crecimiento. Se observó que tanto el crecimiento de las larvas como el del otolito estaban acoplados. Las tasas de crecimiento se calcularon en forma individual (para cada larva) o a partir de modelos largo-edad. Dichos valores no resultaron significativamente distintos entre las primaveras y promediaron 0.44 mm/día. Tampoco hubo diferencias entre las temperaturas...
Tipo: Theses and Dissertations Palavras-chave: Age; Growth; Hydrography; Annual variations; Fish larvae; Growth; Age; Hydrography; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005 URL: http://hdl.handle.net/1834/2605
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Freshwater influx, hydrographic reorganization and the dispersal of ice-rafted detritus in the sub-polar North Atlantic Ocean during the last deglaciation ArchiMer
Small, David; Austin, William; Rinterknecht, Vincent.
A sediment core from the north-east North Atlantic contains high-resolution co-registered foraminiferal O-18 and ice-rafted detritus (IRD) records for the last deglaciation. These reveal a distinct ice-rafting event that occurred at the time of Greenland Interstade 1d (GI-1d), a feature also seen in other high-resolution cores from the North Atlantic. The occurrence of a geographically widespread peak in IRD at ice distal sites at a time when increased freshwater flux to the surface ocean is inferred to have caused rapid cooling suggests a mechanistic link between the processes, analogous to the Younger Dryas (GS-1) cooling episode. The general absence of IRD at southern locations at other times during GI-1 when the flux of icebergs from surviving ice...
Tipo: Text Palavras-chave: Deglaciation; Hydrography; Ice-rafted detritus; North Atlantic; Sea surface temperature.
Ano: 2013 URL: https://archimer.ifremer.fr/doc/00291/40180/39238.pdf
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Hydrographical variability on the French continental shelf in the Bay of Biscay, during the 1990s ArchiMer
Puillat, Ingrid; Lazure, Pascal; Jegou, Anne-marie; Lampert, Luis; Miller, P.
A synthesis of 9 years of hydrographic measurements, acquired during approximately 25 cruises (1992-2000) on the French continental shelf of the Bay of Biscay, is presented. The main focus is upon salinity distribution, as it is little known in this area. The whole of the data set covers I I months of the year, with some sampling fields repeated several times a year, for multiple years. This time-series allows temperature and salinity distributions to be studied together with their seasonal, inter-annual and mesoscale variability. The seasonal trend in temperature can be described in three stages, which are in agreement with past studies. Thermal stratification occurs between May and mid-September in a layer similar to 50 m in thickness, whereas the...
Tipo: Text Palavras-chave: Upwelling; Cold pool; River plumes; Seasonal variability; Salinity; Hydrography.
Ano: 2004 URL: https://archimer.ifremer.fr/doc/2004/publication-779.pdf
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Hydrography and circulation of the Bay of Bengal during withdrawal phase of the southwest monsoon ArchiMer
Sarma, Yvb; Rao, Epr; Saji, Pk; Sarma, Vvss.
Hydrographic data were collected from 3 to 10 September 1996 along two transects; one at 18 degrees N and the other at 90 degrees E. The data were used to examine the thermohaline, circulation and chemical properties of the Bay of Bengal during the withdrawal phase of the southwest monsoon. The surface salinity exhibited wide spatial variability with values as low as 25.78 at 18 degrees N / 87 degrees E and as high as 34.79 at 8 degrees N / 90 degrees E. Two high salinity cells (S > 35.2) were noticed around 100 m depth along the 90 degrees E transect. The wide scatter in T-S values between 100 and 200 m depth was attributed to the presence of the Arabian Sea High Salinity (ASHS) water mass. Though the warm and low salinity conditions at the sea surface...
Tipo: Text Palavras-chave: Hydrologie; Masse d'eau; Circulation; Mousson; Golfe du Bengale; Hydrography; Watermass; Circulation; Monsoon; Bay of Bengal.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43596/43927.pdf
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Hydrography and circulation south of Cyprus in late summer 1995 and in spring 1996 ArchiMer
Zodiatis, G; Theodorou, A; Demetropoulos, A.
The hydrodynamical characteristics of the area south of Cyprus in the Levantine Sea were examined in late summer 1995 and in spring 1996. Analysis of the CTD data collected, provided a new dynamic picture of the Cyprus Basin and revealed the existence of the Cyprus Basin cyclonic eddy. The latter circulated to the south of Cyprus and exhibited marked seasonality. Production of Levantine Intermediate Water in the area of the latter eddy occurred. Occasionally, between the Cyprus Basin cyclonic eddy and the southern coast of Cyprus a warm current, the Cyprus coastal current appears to intrude from the east. In late summer 1995, the spatial fluctuations of the mid-Mediterranean jet, the main current of the Eastern Mediterranean Sea, caused the splitting of...
Tipo: Text Palavras-chave: Circulation; Bassin de Chypre; Méditerranée orientale; Hydrologie; Bassin Levantin; Circulation; Cyprus Basin; Eastern Mediterranean; Hydrography; Levantine Basin.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43667/43203.pdf
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Late Winter Distribution of the American Plaice (Hippoglossoides platessoides) in St. Pierre Bank, 1978–90 ArchiMer
Moguedet, Philippe; Mahe, Jean-claude.
The late winter distributions of the American plaice (Hippoglossoides platessoides) in St. Pierre Bank (NAFO Subdiv. 3Ps) during the period 1978–90 were analyzed using catchesper- 30-min-tow data obtained during the French groundfish surveys which have been conducted annually in February–March. Water temperatures from surface to bottom recorded at the end of each trawling operation were used along with temperature recordings from a standard hydrographic transect. Largest temperature fluctuations occurred in the two upper depth ranges (0–99 and 100–199 m) and were assessed to be due to the great influence of the Labrador Current. Generally, American plaice was well represented in the Halibut Channel. During cold winters (1982, 1985–87, 1989 and 1990),...
Tipo: Text Palavras-chave: American plaice; Hippoglossoides patessoides; Hydrography; Late winter distribution; St. Pierre Bank.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00435/54615/55998.pdf
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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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Oceanografía física del estuario del Río de la Plata y el sistema costero de El Rincón. Noviembre, 1994 OceanDocs
Guerrero, R.A..
Using the CTD data obtained on the R/V Dr.E.L.Holmberg fishery research cruise H-13/94 (November 1994), oceanographic conditions of the coastal area of the Argentine-Uruguayan Common Fishing Zone (AUCFZ) and El Rincón (Buenos Aires Prov., Argentina) are described. Two physical environments were differentiated: the Río de la Plata estuarine systems and El Rincón coastal regime. In both systems thermal and haline fronts that affect the distribution of reproductive concentrations, nursery and spawning areas of coastal species, are identified. Salinity fields of the AUCFZ, as a function of statistical winds, are synoptically analyzed. In El Rincón, the temporal stability observed on temperature and salinity allowed to describe the mean physical conditions for...
Tipo: Journal Contribution Palavras-chave: Estuarine front; Coastal waters; CTD observations; Hydrography; Salinity profiles; Temperature profiles; Coastal oceanography; Coastal waters; Hydrography.
Ano: 1998 URL: http://hdl.handle.net/1834/2469
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Oceanographic and faunistic structures across an Angola Current intrusion into northern Namibia waters. OceanDocs
John, H.C.H.; Mohrholz, V.; Lutjeharms, J.R.E..
It is thought that the penetration of Angolan waters through the Angola–Benguela Frontal Zone (ABFZ) into the much cooler Benguela regime may come about by a poleward slope undercurrent as well as by cross-frontal filaments. To test this hypothesis, two zonal transects off the northern Namibian coast were surveyed by CTD casts, current measurements and ichthyoplankton samples during April 1999. Simultaneous sea-surface temperature (SST), chlorophyll-a concentration, and wind data were obtained from satellite. The multidisciplinary results are described.An intense intrusion of the Angola Current into northern Namibian waters occurred with distinct signals of high temperatures and salinities, low chlorophyll-a concentration, and Angolan fish larvae of both...
Tipo: Journal Contribution Palavras-chave: Oceanographic data; Fauna; Frontal features; Chlorophylls; Temperature; Mesoscale features; Larvae; Surveys; Fish larvae; Hydrography.
Ano: 2004 URL: http://hdl.handle.net/1834/4937
Registros recuperados: 31
Primeira ... 12 ... Última
 

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