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| Registros recuperados: 5.774 | |
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| Abatzopoulos, Th. J.; Amat, F.; Baxevanis, A. D.; Belmonte, G.; Hontoria, F.; Maniatsi, S.; Moscatello, S.; Mura, G.; Shadrin, N. V.. |
| Artemia urmiana (a species previously considered endemic of Lake Urmia, NW Iran) has been found in Lake Koyashskoe, a hypersaline lake on the Black Sea coast of the Crimean peninsula (Ukraine). Therefore, this is the first record of A. urmiana in Europe which updates its distribution. The species identification was based on an integrated and interdisciplinary approach using discriminant analysis of the morphometric characters, scanning electron microscopy, and molecular profile analysis. The data derived from the above mentioned approaches converge to significant similarity of the population under investigation with A. urmiana. The updated geographic distribution of the species, deriving from the present report, asks for additional contribution of other... |
| Tipo: Journal Contribution |
Palavras-chave: Salt lakes; Scanning electron microscopy; Discriminant analysis; Molecular analysis; Biogeography. |
| Ano: 2009 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/1069 |
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| Abdel Wahab, O.. |
| The present investigation deals with the utilization of marine green algae (GA), Ulva lactuca, and an activated carbon prepared from green algae (CGA) as adsorbents for the removal of copper from wastewater. A series of experiments were conducted in a batch system to evaluate the effect of system variables. The effect of pH, initial copper concentration, dose of adsorbents were considered. The optimal pH value of copper (II) adsorption onto GA and CGA was found to be pH 5.0. The maximum uptake capacities were 24.5 and 32.3 mg copper (II) per gram of GA and CGA, respectively. The efficiency of removal was slightly changed by replacing an aqueous solution by saline water or wastewater containing the same copper concentration. Adsorption kinetic data were... |
| Tipo: Journal Contribution |
Palavras-chave: Laboratory Study; Adsorption; Kinetics; Isotherms; Waste water; Adsorption; Http://aims.fao.org/aos/agrovoc/c_137. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1910 |
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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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| Abdel-Aziz, N.E.. |
| Diel vertical migration of different zooplankton groups in Dekhaila Harbor was studied monthly from May 2003 to April 2004. Generally, more groups were found in the surface layer (0-10 m.) than the deeper one (10-20 m.). Some zooplankton groups undergo significant vertical migration at certain time of the year, others showed no clear differences in distribution patterns and exhibited no directed movement patterns. Some species stayed a part of the day within certain layer of the water column, others were randomly dispersed in the whole water column during different hours. Responses appear to depend also on the life stages of each zooplankton group, as well as other ecological conditions such as temperature, light and amount of food. Population budget... |
| Tipo: Journal Contribution |
Palavras-chave: Hydrobiology Studies; Zooplankton; Vertical migrations; Ecology; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_15490. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1455 |
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| Abdel-Halim, A.M.; Aboel-Khair, E.M.; Fahmy, M.A.; Shridah, M.A.. |
| Environmental Information and Monitoring Programme (EIMP) for the Egyptian coastal waters of Aqaba Gulf was established to initial monitoring and data base system by applying quality control assessments in order to evaluate, protect and sustainable use of coastal regions. Within the framework of this programme six bimonthly field campaigns were carried out annually during 1998 – 2004. A total of 11 coastal stations were selected to cover different locations of the Gulf. The surface distribution patterns of hydrographical parameters (water temperature, salinity, dissolved oxygen and pH) as well as chlorophyll-a, total suspended matter, transparency, nitrogen and phosphorus forms and reactive silicate were investigated. The obtained data of seven years work... |
| Tipo: Journal Contribution |
Palavras-chave: Environmental Field Study; Coastal waters; Hydrographic data; Environmental assessment; Coastal waters. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1911 |
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| Abdel-Halim, A.M.; Gharib, S.M.. |
| Species composition, abundance, and phytoplankton biomass in Lake Nasser were studied during the highest flood season in autumn 1999, and were supported by some physico-chemical environmental parameters. The nutrient salts levels were low to medium, with ranges of 0.96-9.92 g/L for nitrite, 20.14-72.14 g/L for ammonia, complete depletion -27.69 g/L for phosphate, and 5.83-9.00 g/L for silicate. A total of 71 taxa were identified, of which 46% were chlorophytes, 26% bacillariophytes and 22% cyanophytes. Phytoplankton abundance and biomass values were higher in the northern stations than in the southern, but were lower than previously reported, indicating approaching from oligomesotrophic status, with,respectively, means of 108.9 x 104 unit/L and 1.18... |
| Tipo: Journal Contribution |
Palavras-chave: Environmental Studies; Phytoplankton; Phytoplankton; Http://aims.fao.org/aos/agrovoc/c_13344. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1454 |
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| Abdelzaher, H.M.A.; Ramdani, M.; Flower, R.; Kraiem, M.M.; Fathi, A.A.. |
| This survey first presents an inventory of fish species in the three studied sites. Altogether 17 fish species were found in Merja Zerga (Morocco), 25 species in Garâat Ichkeul and 16 species in Edku lagoon. Three fish groups live in these brackish lakes : sedentary fish, marine fish and freshwater fish. The second part of the study deals with the production of the different species. This production mainly rests upon Mugilidae and Anguilla in Merja Zerga and Ichkeul, while, in Edku, Tilapia is its principal component. In all these sites fish production seems to be decreasing these last years, because of over-fishing and essentially of the deterioration of the environmental factors, especially the hydrologic ones. |
| Tipo: Journal Contribution |
Palavras-chave: North Africa; Afrique du nord; Lagune Biodiversité Lagoon Biodiversity Lakes Fish Lakes Biodiversity Production http://aims.fao.org/aos/agrovoc/c_4160 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_6200. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/1071 |
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| Abdulhadi, H.A.. |
| The present work was carried out on ten mature Tilapia (Tilapia spilurus) and ten mature Bream fish (Mylio cuvieri) and the specimens were processed for histological studies. The oesophagus of Bream fish is characterized by the presence of numerous mucous cells which react positively to P.A.S. and alcian blue. While oesophagus of Tilapia is completely filled with mucous cells that react positively to P.A.S. only. The stomach of Bream consists of one part while that of Tilapia consists of two parts (cardiac and pyloric). The mucosa of stomach of both types of fish reacted positively to P.A.S. the pyloric caeci of Bream fish showed numerous mucous cells that react positively to Alsain blue. The small intestine of bream has thicker tunica muscularis than that... |
| Tipo: Journal Contribution |
Palavras-chave: Fishery biology; Fishery biology; Http://aims.fao.org/aos/agrovoc/c_2937. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1085 |
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| Abé, Jacques; Bakayoko, S.; Bamba, S.B.; Koffi, K. P.. |
| Cette étude présente la morphologie récente de l'embouchure du fleuve Bandama à Grand-Lahou. A l'interface eau/sédiment apparaissent des chenaux et des hauts fonds tapissés respectivement par des sables fins à très fins et des sables moyens. Les levés périodiques des contours de la passe effectués jusqu'en 1993 indiquent une migration significative de l'embouchure vers l'ouest avec une vitesse de déplacement de l'ordre de 1,1m/mois. Trois chenaux bien individualisés caractérisent la zone . Ce sont au sud-ouest le chenal lagunaire, à l'Est le chenal fluvial dont la profondeur atteint 8 mètres et au Nord le chenal de Lahou Kpanda. L'analyse hydrologique montre l'importance du flot à l'embouchure Ouest tandis que les masses d'eau du jusant empruntent... |
| Tipo: Journal Contribution |
Palavras-chave: Coastal landforms; Coastal inlets; River outflow. |
| Ano: 1993 |
URL: http://hdl.handle.net/1834/5700 |
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| Abreu, J.; González, J.; Rodríguez, Y.. |
| Las cepas de levadura originales usadas en las cervecerías cubanas: Saccharomyces uvarum U-57, Saccharomyces uvarum Budvar y Saccharomyces cerevisiae F-26, se probaron en columnas EBC a 10 ºC durante 7 días, atendiendo a sus propiedades tecnológicas fundamentales: crecimiento, floculación, sedimentación, atenuación, producción de alcohol y eficiencia fermentativa. La floculación de las cepas se estudió a través de aislamientos celulares y valoración morfológica. Los cultivos de levaduras originales y aislados se evaluaron comparativamente en la fermentación, con relación a la capacidad de floculación, concentración de células en suspensión y demás propiedades. Las cepas de levaduras cerveceras originales y aisladas, S. uvarum U-57 y S. uvarum Budvar y... |
| Tipo: Journal Contribution |
Palavras-chave: Production (industrial); Appropriate technology; Flocculation. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4891 |
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| Acero P., A.. |
| Hasta el momento se han identificado catorce especies de peces de la familia Pomacentridae en el Caribe colombiano. Siete de ellas en el género Eupomacentrus, incluyendo E. dorsopunicans, E. planifrons, E. partitus, E. leucostictus, E. meliis, E. variabilis y la estuarina E. otophorus. Las dos especies de Abudefduf del Caribe son conocidas en Colombia, A. saxatilis y A. taurus. Microspathodon chrysurus es uno de los pomacentridus más abundantes en los arrecifes coralinos colombianos, destacándose los juveniles de esta especie, pues desarrollan un comportamiento especial, que se expresa picando los costados de los peces que solicitan limpieza, disturbándolos. Chronih posee cuatro especies conocidas en el área, C. cyanea y C. muliilftieafa, que habitan en... |
| Tipo: Journal Contribution |
Palavras-chave: Marine fish; Taxonomy; Taxonomy; Http://aims.fao.org/aos/agrovoc/c_7631. |
| Ano: 1978 |
URL: http://hdl.handle.net/1834/3935 |
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| Acero P., A.. |
| Se incluye un listado de las 26 especies de clinidos conocidas del Caribe colombiano, de las cuales Labrisomus sp., albigenys, L. bucciferus, Starksia atlántica, Acanthemblemaria rivasi, Coralliozetus sp., Ekemblemaria nigra, Emblemariopsis sp. y Enneanectes sp. son reportadas por primera vez de la costa norte de sudamerica. Malacoctenus macropus y Stathmonotus stahli (subespecie tekla) son nuevas para el Caribe colombiano. Se demuestra la riqueza de especies de esta familia en el sur del Caribe, pues existen 49, 14 de las cuales son exclusivas de esta zona. Esta distribución zoogeográfica restringida se manifiesta claramente en los chaenopsidos, pues la cuarta parte de sus especies caribeñas son conocidas solo del sur. Los géneros Ekemblemaria,... |
| Tipo: Journal Contribution |
Palavras-chave: Marine fisheries; Taxonomy; New records; Marine fisheries; Taxonomy; Http://aims.fao.org/aos/agrovoc/c_4611; Http://aims.fao.org/aos/agrovoc/c_7631. |
| Ano: 1979 |
URL: http://hdl.handle.net/1834/3945 |
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| Acero-P., A.. |
| The chaenopsine blennies are an homogeneous group which may be considered a subfamily of the Clinidae, since the existing evidence is not enough to give them familial status. The subfamily includes eight genera: Mccoskerichthys, Coralliozetus, Acanthemblemaria, Ekemblemaria, Emblemaria, Hemiemblemaria, Lucayablennius, and Chaenopsis. The nominal genera Protemblemaria and Emblemariopsis are herewith considered synonyms of Coralliozetus, since they share two derived characters: small size and sexual dimorphism in the color of the head, and are rather similar in several other characteristics. The división of the West Indian Zoogeographical Province made by Briggs (1974) is unnatural, since the fish fauna of Belize, Florida and the Bahamas is very similar. I... |
| Tipo: Journal Contribution |
Palavras-chave: Fish; Ichthyology; Endemic species; Fish; Endemic species; Ichthyology; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_26882; Http://aims.fao.org/aos/agrovoc/c_3788. |
| Ano: 1984 |
URL: http://hdl.handle.net/1834/4031 |
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| Registros recuperados: 5.774 | |
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