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| Registros recuperados: 10 | |
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| Yasindi, A. W.; Taylor, W. D.. |
| Planktonic ciliates were studied in 17 tropical East African lakes of different salinity and trophic status. Oligotrichs (e.g., Strombidium, Strobilidium and Halteria) and scuticociliates (e.g., Cyclidium, Pleuronema, Cristigera), dominated the ciliate communities. Conductivity and trophic status were the most important environmental variables influencing the distribution of ciliate species in East African lakes. Herbivorous oligotrichs were important in oligotrophic and mesotrophic lakes, as they are in temperate and subtropical lakes, but their importance decreased with increasing chlorophyll a concentration and conductivity. On the other hand, the importance of scuticociliates (primarily bacterivores) increased with increasing chlorophyll a and... |
| Tipo: Proceedings Paper |
Palavras-chave: Freshwater lakes; Abundance; Biomass; Pelagic environment; Salinity; Plankton; Community composition; Oligotrophic lakes; Aquatic communities; Regression analysis; Tropical lakes; Species diversity; Plankton; Freshwater. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/5311 |
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| Alexander, R.; Antenucci, J.P.; Attwater, G.. |
| Winam Gulf (Kenya) is a large (surface area ~ 1400 km2) and shallow (<20 m) bay of northeastern Lake Victoria with only one connection to the open lake through Rusinga Channel. To understand the exchange dynamics between Winam Gulf and the offshore waters of Lake Victoria and the hydrodynamics of the region, field studies were carried out from Apr. 22-May 4 and Aug. 5-16 of 2005. A meteorological station (shortwave, total radiation, air temperature, relative humidity, wind speed and direction), thermistor chain (0.75m vertical resolution) and ADCP (40 cm vertical resolution) were deployed in Rusinga Channel in a depth of 20m. Similarly, at an offshore station in northeastern Lake Victoria another thermistor chain was deployed in a water depth of 40 m... |
| Tipo: Proceedings Paper |
Palavras-chave: Hydrodynamics; Physical limnology; Lake dynamics; Current forces; Physical oceanography; Water circulation; Inland waters; Freshwater lakes; Coupled bodies. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1463 |
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| Madadi, O.V; Wandiga, S. O; Jumba, I. O.. |
| The use of most organochlorine pesticides has been banned or restricted in the republic of Kenya under the Rotterdam and Stockholm convention due to high levels of persistence in the environment and toxicity to nontarget organisms. Studies conducted in some parts of the country have revealed that residue levels of these compounds are still in the environment. However, the residues of these compounds have not been exhaustively studied in the Lake Victoria catchment area. This study was set to investigate the residues levels of p,p-DDT, o,p’- DDE, p,p-DDD, g-HCH, D-HCH, a-HCH, Aldrin, and Dieldrin, in water samples from Lake Victoria catchment. Samples were collected during the short rain, dry and wet seasons and analysed using gas chromatography equipped... |
| Tipo: Proceedings Paper |
Palavras-chave: Pollutants; Catchment area; Pesticides; Chemical pollutants; Toxicity; Freshwater lakes; Pollution effects; Environmental impact; Inland water environment; Pollutant persistence. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1475 |
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| Abila, R.O.; Othina, A.. |
| Wetlands in most parts of the world are under threat of over-exploitation partly because their socio-economic value is not well known. Yala Wetland, the largest freshwater wetland in Kenya, with a large part of it bordering Lake Victoria’s shoreline, faces even greater threats of extinction. This wetland measures about 17,500 ha and is host to a number of indigenous fish species, animals and plants which are exploited by the local communities for subsistence and commercial purposes.There has been pressure to reclaim portions of this wetland for agricultural activity. So far, 2,300 ha has, indeed, been drained for commercial agriculture. Furthermore, it is difficult to control effort in the exploitation of the remaining wetland resources since the... |
| Tipo: Proceedings Paper |
Palavras-chave: Wetlands; Inland waters; Overexploitation; Socioeconomic aspects; Fishery resources; Resource management; Water reservoirs; Monitoring systems; Land use; Resource conservation; Environment management; Protected resources; Freshwater lakes; Inland fisheries; Lake fisheries; Wetlands; Inland waters; Overexploitation; Http://aims.fao.org/aos/agrovoc/c_8371; Http://aims.fao.org/aos/agrovoc/c_3876; Http://aims.fao.org/aos/agrovoc/c_28014. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1493 |
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| Гуменюк, Г. Б.; Редчук, Н. В.; Грубiнко, В. В.. |
| Представлены результаты изучения аккумуляции и перераспределения тяжелых металлов (валового содержания и концентрации растворённых форм) - меди, кобальта, цинка, марганца (биогенных), а также свинца, кадмия и никеля (небиогенных) - в пресноводной экосистеме (воде, прибрежном иле) в озере Песочное Шацкого национального природного парка в зависимости от физических, гидрофизических и биологических факторов. |
| Tipo: Journal Contribution |
Palavras-chave: Heavy metals; Freshwater lakes; Heavy metals; Http://aims.fao.org/aos/agrovoc/c_2223. |
| Ano: 2007 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/607 |
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| Registros recuperados: 10 | |
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