Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 14
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Alteraciones físico-químicas de la columna de agua, generadas por el uso del Boliche (Método de Pesca Artesanal) en la Ciénaga Grande de Santa Marta, Caribe colombiano OceanDocs
Rueda, Mario E.; Mancera-Pineda, José E..
Con el propósito de evaluar los impactos generados por el uso de un método de pesca artesanal denominado "boliche" en la laguna costera tropical Ciénaga Grande de Santa Marta, se cuantificaron diferentes aspectos; uno de los cuales fue orientado a analizar algunas alteraciones físico-químicas de la columna de agua, producidas durante la maniobra de pesca. Se determinó la concentración de oxígeno disuelto, la transparencia del agua y la concentración y composición del seston, antes y después de 70 lances de boliche. Los resultados indican que la maniobra de pesca genera algunos cambios momentáneos de poca repercusión en el ecosistema, tales como resuspensión de partículas principalmente inorgánicas, aumento de la concentración de seston y en consecuencia...
Tipo: Journal Contribution Palavras-chave: Coastal lagoons; Estuaries; Chemical analysis; Environmental impact; Ecology; Estuarine fisheries; Dissolved oxygen; Seston; Fishing gear; Ecology; Estuaries; Environmental impact; Estuarine fisheries; Dissolved oxygen; Coastal lagoons; Seston; Fishing gear; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_2674; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_1697; Http://aims.fao.org/aos/agrovoc/c_6998; Http://aims.fao.org/aos/agrovoc/c_2946.
Ano: 1995 URL: http://hdl.handle.net/1834/3774
Imagem não selecionada

Imprime registro no formato completo
Approche de la capacité trophique dans un bassin ostréicole (Baie de Bourgneuf) ArchiMer
Haure, Joel.
Une étude spatio-temporelle a été menée de mars 1990 à mars 1991 sur deux stations ostréicoles (nord et sud), de la baie de Bourgneuf. Cette étude se divise en deux parties distinctes : - L'une, hydrobiologique a permis, par des prélèvements hebdomadaires à basse mer plus trois heures, de caractériser les masses d'eau qui baignent chaque point d'étude, - L'autre, a eu pour but d'observer, par un suivi mensuel, l'évolution de la croissance, de l'engraissement et de la mortalité d'un échantillon d'huîtres (Crassostrea gigas) élevé sur chacun des secteurs; L'examen des résultats obtenus amène aux constatations suivantes :  - Le secteur nord présente un milieu hétérogène d'une richesse nutritive importante mais est accompagnée d'une charge sestonique minérale...
Tipo: Text Palavras-chave: Baie de Bourgneuf; Crassostrea gigas; Seston; Météorologie; Hydrobiologie; Croissance; Mortalité; Capacité trophique.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00449/56095/57630.pdf
Imagem não selecionada

Imprime registro no formato completo
Croissance et qualité de l'huître Crassostrea gigas Thunberg en élevage dans le bassin de Marennes-Oléron ArchiMer
Deslous-paoli, Jean-marc.
In 1979-1980, the main growth o oysters Crassostrea gigas, in the basin of Marennes-Oleron occured in June and July. The available amount of food and the energetic requirements for the reproduction are important factors determining growth. Tissue weight decreased after spawning until the end of the winter, and this decrease might be related to the high quantities of inorganic particles, in the seston, at that period of the year.
Tipo: Text Palavras-chave: Marennes Oleron; Seston; Growth; Crassostrea gigas; Oysters; Marennes Oléron; Seston minéral; Croissance; Crassostrea gigas; Huîtres.
Ano: 1982 URL: http://archimer.ifremer.fr/doc/1982/publication-2947.pdf
Imagem não selecionada

Imprime registro no formato completo
Factors affecting biochemical composition of seston in an eutrophic reservoir (Pampulha Reservoir, Belo Horizonte, MG BJB
BOËCHAT,I. G.; GIANI,A..
Sestonic biochemical composition (lipids, proteins and carbohydrates) may change with varying environmental fluctuations. These changes and the effects in the nutritional status of algae consists of an actual increasing source of interest. The aims of this work were to establish the relationship between biochemical composition of seston and 1) a range of physical, chemical and climatological factors, and 2) the natural fluctuation in the species composition in phytoplankton assemblages of the Pampulha Reservoir, an urban eutrophic lake located in Belo Horizonte, MG. Seasonal changes in the biochemical composition were observed in this study. None of the considered abiotic factors alone seem to affect the biochemical composition. So the effects could only...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biochemical composition; Seston; Seasonality.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100009
Imagem não selecionada

Imprime registro no formato completo
In situ estimations of uptake and release of material by oysters in the Bay of Marennes-Oléron (France) ArchiMer
Zurburg, Wouter; Smaal, Aad; Heral, Maurice; Dankers, Norbert.
The uptake and release of material by oysters (Crassostrea gigas) in the intertidal zone were estimated in situ in the Bay of Marennes-Oléron (France) in spring and autumn. 10 m long plexiglass tunnels were placed over small tables with bags containing oysters or empty oyster shells (control). Although in the very turbid conditions of the water column sedimentation of suspended particulate material could be observed in control experiments, higher fluxes (uptake) of seston, POC and PON and especially chlorophyll occurred in the presence of live animals. Release of dissolved nutrients was not evident from the tunnel with oysters, which is in contrast with studies in other areas with bivalves. This is ascribed to limited mineralization of biodeposits as an...
Tipo: Text Palavras-chave: Chlorophyll; Seston; Oysters; Nutrient release; Material uptake.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-6842.PDF
Imagem não selecionada

Imprime registro no formato completo
In situ suspension feeding behaviour of the pearl oyster, Pinctada margaritifera: combined effects of body size and weather-related seston composition ArchiMer
Pouvreau, Stephane; Bodoy, Alain; Buestel, Dominique.
In situ clearance rate (CR) and biodeposition of the black pearl oyster, Pinctada margaritifera, were followed during several field experiments from 1996 to 1998 in the lagoon of Takapoto. Serial measurements of total particulate matter (TPM, mg l(-1)), particulate inorganic matter (PLM, mg l(-1)), and particulate organic matter (POM, mg l(-1)) were related to meteorological conditions, especially wind speed. As a general case, POM and PLM increased with wind speed. Nevertheless, PLM increased faster than POM so that the organic content (OC, %) of the TPM decreased progressively when wind speed increased. These TPM variations induced direct changes in feeding processes of P. margaritifera. CR (l h(-1)) averaged 22 l h(-1) for a pearl oyster of 1 g dry...
Tipo: Text Palavras-chave: Biodeposition; Clearance rate; Seston; Filter feedings behaviour; Tropical lagoon; Tropical bivalve.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-382.pdf
Imagem não selecionada

Imprime registro no formato completo
La biodéposition des moules, Mytilus edulis, dans le Pertuis Breton : influence du cycle de marée et impact spatial ArchiMer
Kerambrun, Elodie.
La biodéposition liée à l'exploitation des filières de moules est responsable de l' accumulation de particules fines dans l'environnement marin. Cette biodéposition consiste, à travers la formation de feces et de pseudo feces, en un transfert de particules sestoniques, de la tranche d'eau vers le sédiment. Au cours de ce travail nous avons étudié l'influence des cycles de marée et de l'intensité de celle-ci sur la biodéposition, à travers la mesure de flux verticaux de particules. De même, l'impact de cette biodéposition (aspects qualitatifs et quantitatifs) sur le seston a été abordé. Notre étude montre une variation de l'intensité des flux liée au cycle de marée. Les flux les plus importants sont mesurés lorsque les courants sont les plus intenses,...
Tipo: Text Palavras-chave: Mollusques; Feces; Pseudofeces; Matière organique; Seston; Biodéposition.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/00446/55740/57392.pdf
Imagem não selecionada

Imprime registro no formato completo
La matière organique particulaire dans les eaux du bassin de Marennes-Oléron et de ses marais adjacents (claires) : conséquences pour la nutrition de l'huître Crassostrea gigas ArchiMer
Heral, Maurice; Zanette, Yvan; Deslous-paoli, Jean-marc; Robert, Jean-michel; Razet, Daniel.
In 1979 and 1980, the characteristics of the particulate organic matter are defined fortnightly through seston analyses. It is very high in the basin and very low in the finishing ponds. The phytoplanktonic biomasses are maximal in May in the estuary, and in June-July in the finishing ponds, with chlorophyll contents 10 times higher than those monitored in the basin. Proteins are generally the main biochemical components found in both environments, with glucids accounting for 20 % and lipids for only 10 % of the biochemical components on average. The C/N ratios are almost constant in the finishing ponds with values around 5, typical of phytoplankton, whereas they are very high in the basin except in spring. In the same way, the protid/chlorophyll and the...
Tipo: Text Palavras-chave: Crassostrea gigas; Huîtres; Mollusques; Qualité eau; Seston; Matière organique; Claires ostréicoles; Bassin Marennes Oléron.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/acte-6213.PDF
Imagem não selecionada

Imprime registro no formato completo
Respuesta de la biomasa y la composición C:N:P del primer nivel trófico de un arroyo Pampeano a la mayor sequía de los últimos 20 años: Un estudio de caso Ecología austral
Leggieri,Leonardo R.; Ferreiro,Nicolás A..
El bentos, epifiton, seston, las algas filamentosas libres y las plantas acuáticas proporcionan recursos alimenticios y refugio al resto de los niveles tróficos del arroyo. Aquí estudiamos el efecto de una sequía sobre su biomasa y composición elemental en el arroyo Pampeano La Choza, comparando el año 2007, con ~1200 mm anual, y el año 2008, con ~600mm anual (40% menos que el histórico). Considerando que su abundancia dependería principalmente de la transferencia de masa en la capa límite a bajas velocidades y de la deriva aguas abajo, postulamos (H1) que un año seco genera condiciones desfavorables para las plantas acuáticas y el seston, y favorables para las algas filamentosas epifíticas, bentónicas y de matas libres en un arroyo Pampeano. Como son...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plantas acuáticas; Bentos; Epifiton; Seston; Año seco; Masa; Estequiometria ecológica; Arroyo de la llanura pampeana.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2015000300002
Imagem não selecionada

Imprime registro no formato completo
Seston, phytoplancton et microphytobenthos en rivière d'Auray. Leur role dans le cycle biologique des huitres (Oystrea edulis L.) ArchiMer
Paulmier, Gerard.
Tipo: Text Palavras-chave: Seston; Phytoplankton; Nutrition; Oyster culture.
Ano: 1972 URL: http://archimer.ifremer.fr/doc/1972/publication-2236.pdf
Imagem não selecionada

Imprime registro no formato completo
Suivi de quelques facteurs environnementaux dans les pertuis Charentais : de 1992 à 1994 ArchiMer
Arnaud, Christophe.
A study of the environmental factors in the "pertuis charentais" (charentais straits) has been carried out from 1993 tc 1994. The evolution of water temperature and salinity, as weil as the turbidity, are studied. ln the middle of Breton Strait, near to the long lines, the stratification has not been observed, and the salinity variations are much less sharp than in the stations which are located nearer the coast. The photosynthetic pigments concentrations can be very different in the same time at two close stations; in the Antioch Strait and at the long lines, the values of chlorophyll "a" are comparable; they are much higher in the Breton Strait. At the same time, a study has been made on the physical factors, the photosynthetic pigments concentrations,...
Tipo: Text Palavras-chave: Pertuis charentais; Facteurs physico-chimiques; Turbidité; Pigments chlorophylliens; Seston; "pertuis charentais"; Physical factors; Turbidity; Photosynthetic pigments; Seston..
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00082/19282/16877.pdf
Imagem não selecionada

Imprime registro no formato completo
Transfer of seston to zooplankton in marine ecosystems OMA
Tackx, M..
When considering zooplankton feeding as one of the pathways involved in the transfer of substances in marine ecosystems, it is important to study the composition and size distribution of the seston: firstly, the elements in which one is interested may be associated with different types and sizes of particles; secondly, particle size and composition are important factors in relation t o the feeding process of the zooplankton itself. High speed cinematographic studies have recently revealed that copepods use two different mechanisms for feeding. Small particles (< 12 pm) are collected by continuous low amplitude movements of the second maxillae and combing of the appendages. Larger particles are detected and collected individually by means of a specific...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecosystems; Seston; Zooplankton.
Ano: 1984 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3273
Imagem não selecionada

Imprime registro no formato completo
Variability in particle retention efficiency by the mussel Mytilus edulis ArchiMer
Strohmeier, Tore; Strand, Oivind; Alunno-bruscia, Marianne; Duinker, Arne; Cranford, Peter J..
Seasonal variation in blue mussel, Mytilus edulis, retention efficiency (RE) responses to natural seston concentrations were investigated in the Lysefjord, Norway. The smallest particles shown to be effectively retained (100%) were approximately 7 μm and this was observed on only one occasion. The most common response was for RE to progressively increase from small to large particles with maximum RE at 30 to 35 μm (8 of 12 experiments). Temporal changes in the seston size distribution towards a dominance of smaller particles coincided with a decrease in the RE maxima to particles between 7 and 15 μm diameter. The RE of 1 μm and 4 μm diameter particles ranged between 14–64% and 12–86%, respectively, showing that small particles occasionally serve as a...
Tipo: Text Palavras-chave: Bivalve feeding physiology; Retention efficiency; Clearance rate; Marine ecophysiology; Seston; Suspension feeding; Mytilus edulis.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00054/16509/14024.pdf
Imagem não selecionada

Imprime registro no formato completo
β-N-methylamino-l-alanine (BMAA) and isomers: Distribution in different food web compartments of Thau lagoon, French Mediterranean Sea ArchiMer
Reveillon, Damien; Abadie, Eric; Sechet, Veronique; Masseret, Estelle; Hess, Philipp; Amzil, Zouher.
The neurotoxin BMAA (β-N-methylamino-l-alanine) and its isomer DAB (2,4-diaminobutyric acid) have been detected in seafood worldwide, including in Thau lagoon (French Mediterranean Sea). A cluster of amyotrophic lateral sclerosis (ALS), a neurodegenerative disease associated with BMAA, has also been observed in this region. Mussels, periphyton (i.e. biofilms attached to mussels) and plankton were sampled between July 2013 and October 2014, and analyzed using HILIC-MS/MS. BMAA, DAB and AEG (N-(2-aminoethyl)glycine) were found in almost all the samples of the lagoon. BMAA and DAB were present at 0.58 and 0.83, 2.6 and 3.3, 4.0 and 7.2 μg g−1 dry weight in plankton collected with nets, periphyton and mussels, respectively. Synechococcus sp., Ostreococcus...
Tipo: Text Palavras-chave: BMAA; Diatoms; Chaetoceros sp.; Seston; Mytilus galloprovincialis; HILIC-MS/MS.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00275/38607/37192.pdf
Registros recuperados: 14
Primeira ... 1 ... 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