Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 87
Primeira ... 12345 ... Última
Imagem não selecionada

Imprime registro no formato completo
Seasonal variations in the heterologous binding of viscacha spermatozoa: A scanning electron microscope study Biocell
Aguilera Merlo,Claudia; Muñoz,Estela; Dominguez,Susana; Fóscolo,Mabel; Scardapane,Luis; de Rosas,Juan Carlos.
Seasonal changes in the reproductive activity of the adult male viscacha (Lagostomus maximus maximus) were investigated during the annual reproductive cycle. Assays of heterologous in vitro binding between compatible gametes were used to evaluate the ability of viscacha spermatozoa to achieve primary binding during its annual reproductive cycle. Sperm were collected by mincing cauda epididymis in HECM-3 medium and the sperm concentration and motility were evaluated. Cumulus-free and zona-free oocytes obtained from superovulated hamsters were inseminated in vitro with capacitated sperm suspensions, incubated at 37ºC, 5% CO2 for 3 h, and then processed for studies by scanning electronic microscopy. Statistical analysis was used to compare the quantitative...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Viscacha (Lagostomus maximus maximus); Spermatozoa; Heterologous binding; Seasonal variations.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452005000300001
Imagem não selecionada

Imprime registro no formato completo
Estudios ecológicos en el Golfo San Jorge y adyacencias (Atlántico sudoccidental). Distribución, abundancia y variación estacional del fitoplancton en relación a factores físico-químicos y la dinámica hidrológica. OceanDocs
Akselman, R..
This study was based on four seasonal cruises during 1984 and 1985. It revealed a thermo-haline frontal system formed by the advection of the Coastal Water mass flowing in two branches, one running towards the coast and the other mid-shelf directed. The thermocline developed between late spring and autumn results in a low inorganic nutrient concentration in the upper layer. Nonetheless in winter, a vertical homogeneity and high nutrient concentration were observed. Phytoplankton development presented a typical temperate-seas annual cycle. In winter, reduced populations were dominated by diatoms. The highest biomass concentration in the cycle coincided with the spring blooming, to which Thalassio sira anguste-lineata,Alexandrium tamarense, Heterocapsa...
Tipo: Theses and Dissertations Palavras-chave: Phytoplankton; Abundance; Trophic relationships; Cysts; Seasonal variations; Seasonal thermocline; Plankton surveys; Environmental effects; Phytoplankton; Cysts; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_34811.
Ano: 1996 URL: http://hdl.handle.net/1834/1464
Imagem não selecionada

Imprime registro no formato completo
Les elements nutritifs en baie de Seine ArchiMer
Aminot, Alain; Kerouel, Roger; Mauvais, J.
Seasonal variations of dissolved nutrient concentrations are reported in this paper. Impacts of freshwater are investigated by the study of dilution, nutrient quantity, and relation with phytoplanktonic growth.
Tipo: Text Palavras-chave: Silicon; Phosphorus; Nitrogen; Seasonal variations; Dilution; Primary production; Eutrophic waters; Phytoplankton; River discharge; Coastal zone; Nutrients (mineral).
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1295.pdf
Imagem não selecionada

Imprime registro no formato completo
Cambios de la densidad de los cladóceros P. avirrostris y E. tergentina durante las épocas cálidas y frías (Dic. 2004 y nov. 2005) en la Bahía de Santa Elena (La Libertad - Ecuador) OceanDocs
Andrade, C..
El objetivo del presente estudio es determinar los cambios poblacionales durante las estaciones cálida y fría de este grupo taxonómico y del zooplancton acompañante más abundante en aguas de la Bahía de Santa Elena vs. las variables ambientales temperatura y salinidad.
Tipo: Journal Contribution Palavras-chave: Zooplankton; Seasonal variations; Coastal waters; Community composition; Population number; Zooplankton; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 2007 URL: http://hdl.handle.net/1834/2345
Imagem não selecionada

Imprime registro no formato completo
Variación mensual y mareal del zooplancton en una estación fija del estero del Muerto, Golfo de Guayaquil OceanDocs
Arcos, F.; Martínez, L..
Durante los meses de Marzo de 1983 a Febrero de 1984, se llevaron a cabo muestreos de 24 horas consecutivas en las fases llenas lunares en una estación fija en la región interior del Golfo de Guayaquil. Con esta información se han determinado variaciones mensuales y mareales del zooplancton, así como de otros parámetros ambientales, encontrándose una estrecha relación entre la abundancia de organismos y los valores de salinidad. La mayor biomasa planctónica estuvo asociada con los meses secos de alta salinidad. Analizando la variación mareal, se ha determinado que durante las mareas, existe aporte de material nutritivo desde el interior del estuario hacia la región exterior.
Tipo: Journal Contribution Palavras-chave: Seasonal variations; Zooplankton; Biomass; Zooplankton; Biomass; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1986 URL: http://hdl.handle.net/1834/2142
Imagem não selecionada

Imprime registro no formato completo
Variación y frecuencia de algunas especies de Rotíferos provenientes de la Ciénaga Grande de Santa Marta (Colombia) OceanDocs
Avila Parga, Guerly.
Se describen las variaciones de seis especies de Rotíferos, en un lapso determinado, con respecto a los fuertes cambios de salinidad que presenta la Ciénaga Grande. Cuatro de las especies pertenecen a la familia Brachionidae siendo tres especies del género Brachionus y una del género Platyias; una especie pertenece al género Lecane (familia Lecanidae) y una al género Filinia de la familia Testudinelidae. También se comunica la existencia, para esa región colombiana, de otros géneros de Rotíferos.
Tipo: Journal Contribution Palavras-chave: Zooplankton; Plankton; Microorganisms; Seasonal variations; Coastal lagoons; Estuaries; Zooplankton; Plankton; Estuaries; Microorganisms; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_4807; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 1973 URL: http://hdl.handle.net/1834/3316
Imagem não selecionada

Imprime registro no formato completo
Evaluation des apports fluviatiles dans l''estuaire de la Seine ArchiMer
Avoine, J.
Economic activities and urbanization along the Seine watershed, are the main factors of increased river discharge with natural deposits. A long term supervision of this river has allowed the assessment of the liquid flow rate, the solid load, and the metallic pollution.
Tipo: Text Palavras-chave: Seasonal variations; Trace metals; Sediment transport; Fluid flow; Brackishwater pollution; Estuarine sedimentation; River discharge.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1274.pdf
Imagem não selecionada

Imprime registro no formato completo
Influence des apports fluviatiles en Baie de Seine ArchiMer
Avoine, J; Crevel, L.
Hydrological study of Seine Bay displays two areas differentiated by salinity distribution. One has marine characteristics and the other is under fluvial influence. In this paper the authors give the main results of exchanges between the environments, obtained by the study of water dilution, solid particles dispersion, and their contribution to sedimentation.
Tipo: Text Palavras-chave: Estuarine front; River plumes; Trace metals; Salinity; Residual flow; Seasonal variations; Environmental effects; Sediment dynamics; Estuarine sedimentation; River discharge.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1275.pdf
Imagem não selecionada

Imprime registro no formato completo
Towards the development of environmental indices for the Namibian shelf, with particular reference to fisheries management. OceanDocs
Bartholomae, Ch.; Van der Plas, A..
The Namibian Ministry of Fisheries and Marine Resources has the task of collecting and providing relevant oceanographic information for management of their fisheries. However, quality information is difficult to provide because of the complexity of the processes involved in the Namibian marine ecosystem. Nonetheless, there are oceanographic data available that can contribute to fisheries management by improving the general understanding of important oceanographic processes related to fisheries. The focus of this paper is on the development of simple environmental indices that can serve as a measurement or proxy of the state or intensity of certain important oceanographic processes or variables for temporal comparison. These indices relate to oceanographic...
Tipo: Journal Contribution Palavras-chave: Fisheries management; Marine resources; Oceanographic data; Chlorophylls; Upwelling; Spatial variations; Sardine fisheries; Water temperature; El Nino phenomena; Ecosystems; Fish stocks; Surface temperature; Oxygen; Phytoplankton; Biomass; Seasonal variations; Fronts; Perturbations; Commercial fisheries; Catchability; Remote sensing; Chlorophylls; Dissolved oxygen; Environmental impact.
Ano: 2007 URL: http://hdl.handle.net/1834/4971
Imagem não selecionada

Imprime registro no formato completo
Efecto de la salinidad y la temperatura sobre el ciclo de vida de cangrejos estuariales (Decapoda, Grapsidae). OceanDocs
Bas, C..
El ciclo de vida de los cangrejos verdaderos (Crustacea, Brachyura) incluye en la mayoria de los casos cuatro etapas. Una etapa embrionaria, en la cual los huevos en desarrollo protegidos por una membrana de varias capas, se mantienen adheridos a los ple6podas de la hembra, expuestos a las mismas condiciones ambientales que el adulto . Posteriormente una etapa larval planct6nica y finalmente una fase juvenil y una adulta, ambas bent6nicas en igual o diferente ambiente . Muy frecuentemente [as historias de vida de los organismos son referidas como rigidamente definidas para cada especie, sin embargo existen numerosos ejemplos en invertebrados donde las caracteristicas del desarrollo y la reproducci6n de una especie son ampliamente influenciadas y...
Tipo: Theses and Dissertations Palavras-chave: Salinity effects; Temperature effects; Life cycle; Comparative studies; Larval development; Embryonic development; Feeding; Reproduction; Seasonal variations; Feeding; Embryonic development; Life cycle; Reproduction; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2545; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 2001 URL: http://hdl.handle.net/1834/2972
Imagem não selecionada

Imprime registro no formato completo
Seasonal variation of antibacterial activity of the brown alga padina pavonica (l) thivy collected from northern coast of tunisia OceanDocs
Ben Ali, A. I.; Ktari, L.; Boudabbous, A.; El Bour, M..
L’algue brune Padina pavonica a été récoltée durant une période d’une année (Juillet 2006 à Juin 2007), dans la côte nord de la Tunisie (Cap Zebib) en vue d'évaluer l'activité antibactérienne d’extraits bruts de l’algue et leur variabilité saisonnière. Les extraits d’algue ont été préparés en utilisant le Dichlorométhane et le Dichlorométhane/Méthanol et testés périodiquement (tous les mois) sur une gamme de bactéries pathogènes et des bactéries associées isolées de l’algue. Une variation significative de l'activité antibactérienne liée au solvant d’extraction utilisé a été notée. Ainsi, les extraits au Dichloromethane/Méthanol sont plus actifs. Aussi nous avons noté la présence d’une variabilité saisonnière de l'activité antibactérienne. Ce sont les...
Tipo: Journal Contribution Palavras-chave: Bacteria; Pathogenic bacteria; Seasonal variations; Antibacterials; Algae.
Ano: 2010 URL: http://hdl.handle.net/1834/4699
Imagem não selecionada

Imprime registro no formato completo
Etude des variations saisonnières de différents biomarqueurs, chez la moule Mytilus galloprovincialis. Relation avec certains paramètres physiques, chimiques et physiologiques ArchiMer
Bodin, Nathalie.
The aim of this study was to evaluate the seasonal variations of six biomarkers on Mytilus galloprovincialis, using comparison with physiological index and chemical contamination levels on two sites of  Mediterranean sea. The seasonal variations of acetylcholinesterase (AChE), DNA adducts, benzo(a)pyrene hydroxylase (BPH), heat-shock proteins (HSP), metallothioneins (MT) and multixeniobiotic proteins (MXR) were estimated over a two-year period, on mussels which were sampled in Carteau (original site) and La Fourcade (transplanted organisms). Carteau, an industrial site, presents higher contamination levels (HAP, PCB, heavy metals) than La Fourcade, an urban area. The PAH profiles underline a strong spatio-temporal variability of levels and sources of...
Tipo: Text Palavras-chave: Biomonitoring; Mytilus galloprovincialis; Biomarqueurs; Variations saisonnières; Biomonitoring; Mytilus galloprovincialis; Biomarkers; Seasonal variations.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00443/55499/57042.pdf
Imagem não selecionada

Imprime registro no formato completo
Influence of oyster culture practices and environmental conditions on the ecological status of intertidal mudflats in the Pertuis Charentais (SW France): A multi-index approach ArchiMer
Bouchet, Vincent; Sauriau, Pierre-guy.
The ecological quality status (EcoQ) of intertidal mudflats constrained by Pacific oyster farming was assessed by single (H', AMBI, BENTIX and BOPA) and multimetric (M-AMBI and average score) index approaches in the Pertuis Charentais (SW France). Fifteen sampling stations were monitored seasonally for sedimentological features and macrozoobenthos in 2004. Sediments affected by oyster biodeposits showed organic matter enrichment, and sediments from off-bottom culture sites had higher organic matter contents and lower redox potentials than sediments from on-bottom culture sites. Biotic indices consistently registered responses of macrozoobenthos to organic enrichment but there was only partial agreement between single index-derived EcoQs. The average score...
Tipo: Text Palavras-chave: Exposed/sheltered; Seasonal variations; Benthic macrofauna; Biotic index; Intertidal mudflats; Oyster farming practices.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4650.pdf
Imagem não selecionada

Imprime registro no formato completo
Monitoreo de las condiciones bio-oceanográficas en la I y II Regiones, año 2002 OceanDocs
Braun, M.; Reyes, H.; Valenzuela, V.; Castillo, J.; Osses, J.; Catasti, V..
El presente documento corresponde al pre-informe final del Proyecto FIP 2002-01 Monitoreo de las condiciones bio-oceanográficas fisico-químicas; la distribución geográfica y abundancia de huevos y larvas de los recursos anchoveta, sardina, jurel y caballa y su variabilidad estacional; y la distribución de los recursos detectados por medio de técnicas hidroacústicas en la I y II Regiones, registradas durante los cruceros estacionales de monitoreo MOBIO 0205, MOBIO 0209, MOBIO 0212 y MOBIO 301, realizados en otoño, invierno y primavera de 2002 y verano de 2003 respectivamente. Entrega además la serie de tiempo mensual generada producto de la ocupación de las estaciones costeras de vigilancia localizadas frente a los puertos de Mejillones, Iquique y Arica...
Tipo: Report Palavras-chave: Physical oceanography; Water temperature; Salinity; Dissolved oxygen; Marine ecology; Seasonal variations; Echo surveys; Geographical distribution; Zooplankton; Physical oceanography; Water temperature; Dissolved oxygen; Geographical distribution; Zooplankton; Salinity; Marine ecology; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_16063; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_4609.
Ano: 2004 URL: http://hdl.handle.net/1834/1728
Imagem não selecionada

Imprime registro no formato completo
Monitoreo de las condiciones bio-oceanográficas entre la I y IV Regiones, año 2005 OceanDocs
Braun, M.; Valenzuela, V.; Reyes, H.; Castillo, J.; Pizarro, M.; Catasti, V.; Saavedra, J..
En el presente informe se entregan los resultados de las condiciones oceanográficas físico-químicas, la distribución geográfica, abundancia y variabilidad estacional e interanual de huevos y larvas de anchoveta, sardina, jurel y caballa y la distribución espacial e índices de densidad y cobertura geográfica de los recursos detectados por medio de técnicas hidroacústicas entre la I y IV Regiones, obtenidos durante los cruceros estacionales realizados en invierno y primavera de 2005 y verano de 2006.
Tipo: Report Palavras-chave: Abundance; Geographical distribution; Fish eggs; Echo surveys; Seasonal variations; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2006 URL: http://hdl.handle.net/1834/1847
Imagem não selecionada

Imprime registro no formato completo
Monitoreo de las condiciones bio-oceanográficas entre la I y IV Regiones, año 2005. Informe Final corregido. 2da. Versión OceanDocs
Braun, M.; Valenzuela, V.; Reyes, H.; Castillo, J.; Pizarro, M.; Catasti, V.; Saavedra, J.; Letelier, J..
En el presente informe se entregan los resultados de las condiciones oceanográficas fisico-químicas, la distribución geográfica, abundancia y variabilidad estacional e interanual de huevos y larvas de anchoveta, sardina, jurel y caballa y la distribución espacial e índices de densidad y cobertura geográfica de los recursos detectados por medio de técnicas hidroacústicas entre la I y IV Regiones, obtenidos durante los cruceros estacionales realizados en invierno y primavera de 2005 y verano de 2006.
Tipo: Report Palavras-chave: Echo surveys; Geographical distribution; Abundance; Seasonal variations; Fish eggs; Fish larvae; Physical oceanography; Chemical oceanography; Geographical distribution; Physical oceanography; Fish larvae; Chemical oceanography; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_1516.
Ano: 2007 URL: http://hdl.handle.net/1834/1850
Imagem não selecionada

Imprime registro no formato completo
Variación estacional de las características químicas de las aguas ecuatoriales subsuperficiales al oeste de las Islas Galápagos en el área de ocurrencia de la corriente de Cromwell (1988-2002) OceanDocs
Burgos, L.; Palacios, C..
Este estudio se lo realizó al oeste de las Islas Galápagos de los diferentes cruceros oceanográficos realizados desde 1988 hasta el 2002, con el propósitoo de conocer las características hidroquímicas de las Aguas Ecuatoriales Subsuperficiales (AESS), las cuales se estima mantienen relación con el flujo y aporte de la Corriente de Cromwell que tiene su mayor incidencia en esta área y su comportamiento estacional frente a los cambios climáticos en época húmeda (Marzo-Mayo) y seca (Agosto-Septiembre).
Tipo: Journal Contribution Palavras-chave: Seasonal variations; Chemical oceanography; Nutrients (mineral); Thermohaline circulation; Dissolved oxygen; Multiship expeditions; Dissolved oxygen; Chemical oceanography; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_1516.
Ano: 2002 URL: http://hdl.handle.net/1834/2234
Imagem não selecionada

Imprime registro no formato completo
Determination of seasonal phytoplankton communities, based on quantitative data using a mathematical analysis OMA
Caljon, A..
The definition of algal communities has always been a very discussed subject. We applied a principal component analysis on quantitative phytoplankton data. This ordination technique made it possible to distinguish the algal groups present. This technique is very often applied in the phytosociology of higher plants but less frequently in the phytosociology of algae. Till now this ordination has been used in phycology, merely for marine- and freshwater benthic algae, e.g. the benthic diatoms of rivers (Descy 1976a, b).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Community composition; Mathematical analysis; Phytoplankton; Seasonal variations.
Ano: 1978 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3581
Imagem não selecionada

Imprime registro no formato completo
Role des bacteries phototrophes anoxygeniques dans une partie stratifiee d'une lagune tropicale (Lagune Ebrie, Cote d'Ivoire) ArchiMer
Caumette, P.
In the deepest parts of the estuarine region of Ebrie Lagoon (Abidjan Africa, (5 degree N, 4 degree W) stratified conditions have been observed during the rainy season (May to Nov.), owing to salinity differences between oxic and anoxic layers. At the interface, 3-4 m depth, phototrophic bacteria (Chromatium, Chlorobium and Pelodictyon ) developed, forming a brown layer due to their different pigments. Their production has been estimated at 41% of the total photosynthetic production during high stratification (Sep. 1981) and their biomass was used by the copepod population for 40 to 60% of its diet. During the dry season, the water column became homogeneous and oxygen was detected to 6m depth. The brown layer of phototrophic bacteria disappeared, as well...
Tipo: Text Palavras-chave: Chlorobium; Chromatium; Primary production; Photosynthesis; Estuaries; Seasonal variations; Plankton; Stratification; Vertical distribution; Bacteria; Coastal lagoons; Trophic relationships; Biomass.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-957.pdf
Imagem não selecionada

Imprime registro no formato completo
Description de l'activité des flottilles pélagiques industrielles en 1987 dans la ZEE mauritanienne. OceanDocs
Chavance, P..
En 1987, 59 chalutiers pélagiques (62-102 m, 2000 – 3880 cv) ont opéré dans la ZEE mauritanienne. Trois pays sont représentés : l’URSS, la Roumanie et l’Allemagne de l’Est. Les captures totales atteignent 441473 tonnes dont 66,5% est pêchée par les soviétiques, 26,3% par les roumains et 7,2% par les allemands de l’Est. Les chinchards (<Trachirus sp et Decapterus rhonchus>) prédominent dans les captures avec 50,8%, les sardinelles en représentent 14,9% et la sardine 7,7%. L’activité des flottilles est apparue, comme en 1986, très marquée par les saisons hydrologiques.
Tipo: Journal Contribution Palavras-chave: Chalutiers pélagiques; Flottilles industrielles; Captures; Saisons hydrologiques; Commercial fishing; Environmental impact; Fishing effort; Fishing fleet; Pelagic fisheries; Seasonal distribution; Seasonal variations; Temperature effects; Temporal variations; Trawling; Upwelling; Environmental impact; Trawling; Fishing effort; Pelagic fisheries.
Ano: 1988 URL: http://hdl.handle.net/1834/1147
Registros recuperados: 87
Primeira ... 12345 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional