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  • Articles  (8)
  • Chemical analysis
  • Chemistry
  • Marine pollution
  • United States
  • Alexandria: National Institute of Oceanography and Fisheries  (5)
  • Instituto Oceanográfico de la Armada, Guayaquil, Ecuador  (3)
  • 2005-2009  (8)
  • 1
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    Efectos de la contaminación crónica por hidrocarburos en el Puerto de Mar del Plata (Argentina), sobre una colonia de lobo marino de un pelo, Otaria flavescens. (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: La ciudad de Mar de Plata en la provincia de Buenos Aires, es el Puerto pesquero más importante de la Argentina, desde el cual operan mas de 400 naves. Para entrar al puerto todas las naves pasan frente a una colonia de lobo marino de un pelo oataria flavescens establecida en uno de los márgenes de la escollera Sur dentro del puerto. Esta colonia está protegida del contacto con el público por un vallado de alambre tejido. Esta compuesta exclusivamente por machos, que descansan durante el invierno. Durante el período reproductor los animales se desplazan hacia las colonias reproductivas, retornando a la lobería a fin del verano. Un alto porcentaje de los animales mostró alteraciones de piel y mucosas al examen visual, con pérdida de pelo abarcando una superficie del 40-95 % del cuerpo. Esta condición demostró ser común en animales de mayor edad, los que cada año retornan a la lobería. Ha sido probado en mamíferos terrestres que las enfermedades de la piel se relacionan tanto con infecciones como con la exposición crónica a los hidrocarburos. En esta colonia los animales toman contacto con el petróleo en el agua o al trepar las rocas. Se realizaron necropsias de tres animales hallados muertos en el área. Uno de ellos presentaba peladuras en el 95% del cuerpo. La histología mostró una epidermis adelgazada con desprendimiento parcial, y atrofia de folículos y glándulas anexas. Los análisis de agua realizados dentro del puerto demostraron la presencia de compuestos saturados derivados del petróleo.
    Description: Mar del Plata City is the most important fishing harbor in Argentina, from where of 400 ships operate. For entering into the harbor, the ships must pass in front of the sea lions colony, which is protected by a fence from the people. The colony is composed only by males, during the breeding cycle they swin to the reproductive colonies and return at the end of the breeding period. A great percentage of the animals, showed skin and mucous diseases with loss of pelage in the 40-95% of the body surface this condition is common in the older animals that every year return to the colony. It has been proved in terrestrial mammals, that skin disease is related to infectious diseases as well as chronic exposure to toxic compounds as oil. Sea lions in this colony are in contact with oil while remaining in water or climbing the rocks. Necropsies of three animals found dead were done. One of them had been affected in the 95% of the body surface. It showed a thinner epidermis with partial tearing and few folicles with annexial glands atrophy. water samples at four diferrent points inside the harbor were taken for analizing. They showed several peaks, in the saturated hydrocarbons fraction.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Marine pollution ; Petroleum hydrocarbons ; Marine mammals ; Oil pollution ; Fishing harbours
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
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    Contaminación por residuo de hidrocarburo del petróleo en el Puerto Marítimo de Guayaquil y su área de influencia debido a actividades navieras, período 1984 al 2004 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Siendo Guayaquil el principal Puerto Marítimo y fluvial del Pacífico Ecuatoriano, y de gran importancia del comercio exterior que maneja el sistema portuario nacional, así como las diversas actividades como la exportación: carga refrigerada e importación de materias primas para la industria, se determinó un estudio de evaluación cualitativa y cuantitativa de los derrames eventuales de residuos de hidrocarburos del petróleo ocasionado por las diferentes embarcaciones apoderadas en los muelles de Autoridad Portuaria de Guayaquil.
    Description: The study featured a quantitative and qualitative evaluation of the contamination of hydrocarbons and petroleum from different cruises in the waters of Estero Salado and Estero El Muerto in the area surrounding the docks of the Guayaquil Port Authority, using contamination data collected during the period 1984 to 2004 by INOCAR. Qualitatively the studies show the presence of bilge waters in most of the study areas from the merchant ships that arrive daily at the port, with the majority occurring in the years 1999 and 2004. With chromatograph analysis were registered 40 positive samples and 15 negative samples, being the highest detection on 2004 year. It was found that the higher frequency of oil spill occurred in the influence area of the APG harbor was in the general loading area # 1 until harbor # 6. From the quantitative point of view, the concentration of solved and dispersed hydrocarbons (HDD) in all the study area, considering the tide state (high and low tide) is relatively low compared with the permissible limit of 10, considered as the maximum value for surface natural waters in the standard UNESCO 1976. By the other hand, it must be considered that this minimum concentration produce the existence of a permanent oil film, giving a character of chronicle with the consequence of producing negative effects to the ecosystem at a short or medium term.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Keywords: Harbours ; Petroleum hydrocarbons ; Merchant ships ; Boats ; Harbours ; Marine pollution ; Oil pollution
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
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    Contaminación marina por petróleo en aguas costeras ecuatorianas (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo realiza un enfoque general acerca de la problemática de la contaminación marina por petróleo, el comportamiento de este contaminante en el mar, así como las fuentes más probables de contaminación por petróleo. Además se presenta un enfoque específico de la concentración y distribución de hidrocarburos del petróleo, disueltos y dispersos en aguas del mar, frente a las principales poblaciones costeras de las provincias del Guayas y el Oro, tomando en consideración dos muestreos, Diciembre de 1985 y Abril de 1986. Se concluye que, aún cuando no se han detectado concentraciones masivas de hidrocarburos disueltos y dispersos en las aguas estudiadas, sin embargo, la presencia del contaminante, en todas ellas, en mayor o menor grado, indica que la contaminación existe, en forma crónica, con el consiguiente daño ecológico que se pudiera ocasionar al ecosistema costero.
    Description: Incluye ref.bibl., ilus., grafs.
    Description: Published
    Keywords: Marine pollution ; Oil pollution
    Repository Name: AquaDocs
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  • 4
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    Geochemical and environmental studies of recent marine sediments and some hard corals of Wadi El-Gemal area of the Red Sea, Egypt (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This Journal is published by National Institute of Oceanography and Fishereies, Alexandria, Egypt
    Description: The distribution of (Fe, Mn, Zn, Cu, Pb, Ni, Co and Cd) concentrations were determined in surface marine sediments and coral reefs at Wadi El-Gemal in the Red Sea area. There were significant differences in concentrations of heavy metals in the marine sediments relative to the coral reefs. Some heavy metal concentrations in sediments and coral reefs in the study area are high compared to that in the impact areas of the Egyptian Red Sea coast. The results indicate that the high concentrations of heavy metals in marine sediments and coral reefs are particularly affected by the high contribution of terrigenous materials through the stream of Wadi El-Gemal. Generally, heavy metals concentration in the sediments decreased with increasing distance from the shoreline with the exception of Pb, which increased with increasing distance from the shoreline. On the other hand, Pb concentration in coral reefs is high compared to that in some sediment samples at Wadi El- Gemal area. The grain size, carbonate, organic matter, phosphorus and heavy metals distribution reflect marked changes in lithology, biological activities in the sea and land geology of the study area. Carbonate content mainly of biogenic origin varies from 5.7 –69.5% of the sediments. Organic matter contents of the sediments (1.7 to 6.5%) and phosphorus content (110 to 5097ppm) usually reflect significant terrigenous influences. On the other hand, heavy metals show an increasing tendency in the mud fraction of Wadi El-Gemal area. The present work reflects how much the marine sediments and coral reefs are influenced by natural impacts from this wadi. The collected data will be useful in management and suitable development of the area, beside being helpful as database in the future.
    Description: NIOF
    Description: Published
    Keywords: Hard corals ; Wadi El-Gemal ; Natural impacts ; Heavy metals ; Environment ; Marine ecology ; Environments ; Marine ecology ; Marine pollution ; Sediments ; Coral reefs
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 5
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    Physico-chemical characteristics of abu za'baal ponds, Egypt (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: NIOF, Alexandria, Egypt
    Description: The present study deals with the physical and chemical characteristics of the water of Abu Za'baal Ponds. Determination of physical parameters (air and water temperatures, transparency, electrical conductivity, salinity, total solids, total dissolved solids and total suspended solids) and chemical parameters (pH, DO, BOD, COD, HCO3 -, CO3 --, Cl- , SO4 --,Ca2+, Mg2+, Na+, K+, NO2-, NO3-, NH3, PO4--, TP and SiO2-) were carried out to identify the nature and quality of the water of Abu Za'baal Ponds. The present results reveal that the values of most physical and chemical parameters were higher than those of freshwater, lower than those of saline water and in the same range of the brackishwater. Thus, the water of Abu Za'baal Ponds can be classified as brackishwater.
    Description: National Institute of Oceanography and Fisheries- Alexandria, Egypt
    Description: Published
    Keywords: Abu Za'baal Ponds ; Chemical composition ; Coastal waters ; Environmental conditions ; Chemical analysis ; Chemical composition ; Coastal waters ; Environmental conditions ; Environmental effects
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 6
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    Polycyclic aromatic hydrocarbons and aromatic plasticiser materials in the sea water of alexandria coastal area (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by NIOF, Alexandria, Egypt
    Description: Polycyclic aromatic hydrocarbons (PAHs), the real contaminants of petroleum, were detected in the surface seawater of Alexandria coastal area in winter and spring seasons of 1995. Their order of predominance, particularly for the individual components were principally due to the processes of input, transport and fluxes. Variation of PAHs was not following seasonal changes but it was slightly affected by partial dissolution of the lowerboiling aromatic hydrocarbons. The most abundant component of aromatic hydrocarbons was pyrene (PAH),112ngI-1 followed by naphthalene(56ngI-1) and its alkylated derivatives (dicyclic), then phenanthrene(14ngI-1) and its methylated derivatives (tricyclic). The potential fish carcinogenic PAH, dibenz [a & c] anthracene was found in extremely trace levels. Most aromatic hydrocarbons present in seawater were arised from combustion of various petroleum and non-petroleum products, while few aromatics were found as a result of petroleum pollution. PAHs were also detected in rain water(25ngI-1). Plasticiser mate rials (phthalates) were determined everywhere at considerable levels in the coastal area of Alexandria; which is the first district in Egypt for producing and recycling polyethylene, plastics and nylons.
    Description: NIOF
    Description: Published
    Description: Polycyclic aromatic hydrocarbons, Sources, Seasonal changes, Natural variation, Plasticizer materials, Rain water
    Keywords: Marine environment ; Environment ; Chemical analysis ; Environments ; Marine environment ; Marine pollution ; Oil pollution
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 7
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    Distribution and relationships of heavy metals in the giant clam (Tridacna maxima) and associated sediments from different sites in the Egyptian Red Sea Coast (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by National Institute of Oceanography and Fisheries, Alexandria, Egypt
    Description: The giant clam (Tridacna maxima) and sediments have been collected from clean and contaminated coastal sites of the Egyptian Red Sea. Selected samples of the giant clam shells and the associated surface sediments were analyzed for Fe, Mn, Zn, Cu, Pb, Ni and Cd. Significant spatial differences in metal concentrations in Tridacna maxima and sediments were identified. Copper and lead are greatly enriched in the giant clam shells, which is related to their physiological function. Cd content is higher in Tridacna maxima than in sediments, because of the easy substitution between Cd and Ca. The levels of most metals in the giant clam shells and sediments were higher in the anthropogenic sites than in the uncontaminated sites. Generally, metal variations reflect natural conditions and human activity. Moreover, there are no clear relationships between concentrations of heavy metals in the giant clam shells and those in sediments.
    Description: NIOF, Alexandria, Egypt
    Description: Published
    Keywords: Bioaccumulation ; Heavy metals ; Giant clam ; Tridacna ; Red Sea ; Absorption ; Accumulation ; Chemical analysis ; Clam culture
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 8
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    Ecological and fisheries development of Lake Manzalah (Egypt): hydrography and chemistry of Lake Manzalah (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by the NIOF, Egypt
    Description: 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 μmol SiO4 -2 l-1 and 1.81 to 17.7 μ_mol NO3-1 l-1 The concentrations of phosphorus and nitrogen compounds were found to be relatively higher at the southern regions of the Lake near to the outlets of the drains.
    Description: NIOF
    Description: Published
    Keywords: Hydrography ; Water ; Chemistry ; Chemical composition ; Water content ; Environment ; Chemical composition ; Environments ; Water content ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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