Titlebook: Limnology and Marine Biology in the Sudan; H. J. Dumont,A. I. Moghraby,L. A. Desougi Book 1984 Dr W. Junk Publishers, The Hague 1984 biolo

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The Nile: Description, hydrology, control and utilisationgaining control on the river are discussed. Presently, the Nile is used for irrigation, the generation of hydroelectric power, navigation, and, of particular importance to limnologists, fisheries. Future developments in the management of the Nile are summarized.

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Implications of sea mining for the Red Sea environmentg the coasts and reefs from transiting ships, harbours, industrial and human wastes with growing population and industrialization..The discovery, in the mid-sixties, of deposits of metalliferous muds, rich in heavy metals, and the probable mining and processing of these was expected to add to the ri

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Some algae from the Red Sea Hills in north-eastern Sudanof which the diatoms, representing 50% of the algal flora, are the most numerous. Other large groups are the blue-green algae (17%) and the green algae (24%) among which the desmids (6%) are rather unimportant.

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Observations on the effect of the weevils , Warner and , Hustache on the growth of water hyacinth are caused by this weed. The two weevils . and . were imported and released in an attempted biological control against the weed. The adults of these weevils attack the plant and feed by removing tissues from the leaf pseudolamina and petioles. The larvae tunnel inside the petioles and the crown. Th