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| Registros recuperados: 374 | |
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| Betanzos Vega, A.; Siam Lahera, C.; Arencibia Carballo, G.. |
| A partir de información antecedente y de muestreos realizados en el año 2006 y 2008, se determinan incrementos de la salinidad en aguas al norte de la provincia de Villa Clara, Cuba; realizándose comparaciones entre esta variable y la talla de ostiones (Crassostrea rhizophorae, Guilding 1828) en la Bahía Sagua la Grande. Se encontró diferencia significativa entre la salinidad por estaciones, y entre la talla media de ostiones por sitios de muestreo (ANOVA, p < 0,05). Se presentan relaciones inversas estadísticamente significativas entre la salinidad y la talla media de los ostiones: en febrero de 2006, R2 = 0,91; α < 0,05 y en enero de 2008, R2 = 0,94; α < 0,05. La distribución horizontal de la salinidad, incide en la estructura de tallas... |
| Tipo: Journal Contribution |
Palavras-chave: Mangrove swamps; Salinity; Mangrove swamps; Salinity; Http://aims.fao.org/aos/agrovoc/c_4577; Http://aims.fao.org/aos/agrovoc/c_6751. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4091 |
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| Sghaier, Y. R.; Zakhama-Sraieb, R.; Charfi-Cheikhrouha, F.. |
| Two sampling stations were selected in order to assess the response of the seagrass to lagoon conditions. Leaf growth was estimated using Zieman method and rhizome production was evaluated by marking rhizome terminals. The vegetative development of C. nodosa inside the lagoon at the limit of its distribution is different from that observed close to the communication channel with the sea. The growth of C. nodosa show a clear unimodal cycle in the two stations reaching maximum leaf development in summer. Shoot density decreased from 915 to 500 shoot m-2 from the communication channel toward the lagoon. The average total biomass varied between 241.6 ± 34 g DW m-2 and 413.8 ± 46 g DW m-2. Leaf plastochrone interval varied seasonally with an annual average of... |
| Tipo: Journal Contribution |
Palavras-chave: Salinity; Biomass; Seagrass; Lagoons; Water temperature; Lagoons; Salinity; Biomass. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5305 |
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| Ortega, J.; Jara, V.; Alvarez, M.; Rentería, W.. |
| El presente estudio consiste en un análisis descriptivo de los parámetros físicos (temperatura-salinidad) y corrientes superficiales y sub-superficiales, obtenidos en los sitios de visita turística de la Reserva Marina de Galápagos (RMG), los cuales describen las condiciones oceanográficas de dichos lugares. Estos datos han sido procesados con el propósito de establecer una caracterización de la temperatura superficial del mar en estos sitios, y sus variaciones a lo largo del 2011. Esta caracterización será soportada con el uso de los datos del Análisis Operacional de Temperatura Superficial del Mar y de Hielo Marino (UKMO-L4HRfnd-GLOB-OSTIA) a fin de conseguir una continuidad en la serie de tiempo anual. |
| Tipo: Journal Contribution |
Palavras-chave: Temperature; Salinity; Surface temperature; Sea ice; Marine parks; Surface currents currents. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4658 |
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| André, E.. |
| Foi observado um evento de afloramento de algas nocivas e morte maciça de peixes e interrupção temporária das actividades turísticas na lagoa de Bilene, Moçambique em 2007. O presente estudo pretende fazer uma caracterização da hidrodinâmica e do estado trófico desta lagoa e compreender processos que resultam em afloramentos de algas tóxicas. Entre Julho de 2010 e Agosto de 2011, foram realizados oito campanhas de colheitas de dados de CTD incluindo a concentração de oxigénio em água,cobrindo um ciclo anual. Os resultados revelaram que a Lagoa de Bilene contem duas sub-bacias, uma a sul, maior em extensão geográfica mas menos profunda, e uma bacia a norte, com menor extensão geográfica mas mais profunda. As massas de água tem uma caracterização típica com... |
| Tipo: Journal Contribution |
Palavras-chave: Eutrophication; Fertilization (biological); Salinity; Oxygen; Temperature; Oxygen deficiency; Temperature. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5143 |
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| Lyimo, T.J.; Hamisi, M.I.; Muruke, M.H.S.. |
| We report on the occurrence and diversity of cyanobacteria in intertidal seagrass meadows at Ocean Road and Mjimwema, Dar es Salaam, Tanzania. Nutrients, temperature and salinity were measured as comparative environmental factors. A total of 19 different cyanobacteria taxa were encountered, out of which eight were found exclusively in Mjimwema, four exclusively in Ocean Road and seven were common to both sites. Oscillatoria, Lyngbya and Spirulina were the dominant cyanobacterial genera. Cyanobacterial coverage was higher in Mjimwema (31–100%) than in Ocean Road (0–60%). The levels of nutrients in tidal pool waters at Ocean Road ranged from 0.45–1.03 ìmol NO3 -N/l, 0.19–0.27 ìmol NO2 -N/l and 0.03–0.09 ìmol PO4 -P/l. At Mjimwema the nutrient concentration... |
| Tipo: Journal Contribution |
Palavras-chave: Sea grass; Salinity; Temperature; Bacteria; Nutrients; Salinity; Temperature; Http://aims.fao.org/aos/agrovoc/c_5274; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_7657. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1137 |
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| Mensi, F.; Ksouri, J.; Seale, E. G.; Romdhane, M.S.. |
| L'exploitation des algues rouges appartenant au genre Gracilaria pour l'extraction de l'agar a considérablement augmenté au cours des dernières décennies. En Tunisie Gracilaria verrucosa (Hudson) Papenfuss 1950 (Rhodophyta), est candidate pour la culture dans la lagune de Bizerte (Nord de la Tunisie) où ne pousse que sur une courte période de l’année. Ainsi, le but de cette étude est de recueillir des informations de base sur sa croissance dans cette région. Les effets de la salinité des sources d’azote et du phosphore ainsi que leurs concentrations sur la croissance de cette algue ont été étudiés à l'échelle de laboratoire en utilisant la méthodologie de surface des réponses. Afin de déterminer les interactions entre les variables et les niveaux optimaux... |
| Tipo: Journal Contribution |
Palavras-chave: Algae; Ammonium; Red algae; Salinity; Growth; Nitrates. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4734 |
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| Elageed, Salma. |
| Based on data obtained during the Geochemical Ocean Section Study (GEOSECS)1977, Mer Rouge (MEROU) 1982, and US Joint Global Ocean Flux (JGOFS)1995 studies we have analyzed the processes controlling the total alkalinity (TA) of the whole water column in the Arabian Sea and the Red Sea. The main processes important for the TA variability in area of study are salinity variations, soft tissue production, calcium carbonate formation and dissolution, and sedimentation. For the subsurface waters different processes dominate in the different basins. Regarding spatial variations in surface TA, maximum values occur in the Red Sea and minimum in the upwelling region along the Omani coast in the Arabian Sea. These variations are mainly associated with physical... |
| Tipo: Theses and Dissertations |
Palavras-chave: Alkalinity; Salinity; Sedimentation. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4549 |
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| Abdel-Aziz, N.E.. |
| The variations of zooplankton structure and abundance were studied at short time intervals in the northern part of the West Naubaria Canal, near the sea side, based on weekly sampling from May 2002 to May 2003 .The community represented high species richness (120 species), and relatively low population density ( annual average 31340 organisms/m.3). Freshwater forms were the major representatives (68 species) of the community, including the sea side station. However, several marine species were reported inside the canal at a long distance from the sea. The community structure showed wide weekly variations (4-29 species), while between stations the differences were small. Relative to salinity in the canal, diversity index sustained the highest value (annual... |
| Tipo: Journal Contribution |
Palavras-chave: Naubaria Canal; Salinity; Zooplankton; Zooplankton; Salinity; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1300 |
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| Valencia T., M.; Rodríguez de Moran, A.; Vega, M.. |
| Se presentan las características hidroquímicas de las aguas de las Bahías Chile, Almirantazgo y Fildes, en las Islas del Archipiélago Shetland del Sur, en base a la distribución horizontal y vertical de los parámetros: Oxígeno disuelto, salinidad y micronutrientes inorgánicos (fosfato, nitrito, nitrato y silicato). En forma general, se observa aguas bién oxigenadas, con salinidad relativamente baja, especialmente en la capa superficial, parámetro influenciado por el aporte de aguas de deshielo de los glaciares cercanos. Igualmente alta concentración relativa de micronutrientes inorgánicos, con escasa estratificación de los mismos. |
| Tipo: Journal Contribution |
Palavras-chave: Water analysis; Vertical distribution; Horizontal distribution; Dissolved oxygen; Salinity; Nutrients (mineral); Dissolved oxygen; Water analysis; Salinity; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_6751. |
| Ano: 1993 |
URL: http://hdl.handle.net/1834/3768 |
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| Sánchez, G.E.; Morales, E.; Guillot, G.; Vidal, L.A.. |
| Microalgae are important for the restoration of coastal lagoon ecosystems affected by human activities because they are useful indicators of variations of salinity and levels of nutrients such as silicate and phosphate in the water column. With the centric diatom Actinocyclus normanii from Ciénaga Grande de Santa Marta (Colombian Caribbean) we conducted several experiments to evaluate the responses of this species at three levels of salinity (0, 15 and 25) and two initial densities (100 and 800 cells·ml-1) to nine treatments combining several concentrations of phosphate (0, 1,5 and 3,0 µmol·l-1) and silicate (10, 150 and 300 µmol·l-1). All treatments were maintained with light intensity of 57,9 mE-2·seg-1, photoperiod of 12:12 hrs, temperature between 22... |
| Tipo: Journal Contribution |
Palavras-chave: Phosphates; Salinity; Silicates; Phosphates; Salinity; Silicates; Http://aims.fao.org/aos/agrovoc/c_35986; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_28560. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/3124 |
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| Mwaluma, J.; Nogueira Mendes, R.; Raedig, C.; Emmerson, W.; Paula, J.. |
| The larval stages of the mangrove crab Parasesarma catenata were reared in the laboratory from eggs of females collected in the Mgazana estuary, South Africa. Survival and duration of larval stages were tested for the combined effects of temperature and salinity in a factorial design experiment, using three females each with two replicates of 15 larvae per combination. Combinations were made from five temperature (15, 20, 25, 30 and 35 ºC) and four salinity values (15, 25, 35 and 45 ‰). Results were tested by ANOVA and multiple regression was applied to generate contour models by polynomial equation. It was found that P. catenata larvae develop optimally in near to seawater salinity at a temperature of around 25 ºC. These results support the assumption... |
| Tipo: Journal Contribution |
Palavras-chave: Mangroves; Crab culture; Salinity; Temperature. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/956 |
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| Registros recuperados: 374 | |
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