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Dependence of Tropical River Fisheries on Flow  

Dependence of Tropical River Fisheries on Flow

Much work has been done on the flow requirements for maintenance of fish populations and fisheries in temperate rivers but few equivalent studies are available upon which to base criteria for the management of water regimes for fishes and fisheries in large river systems, particularly in the tropics. Fish in such rivers are heavily influenced by flood regimes that fluctuate naturally from year to year. Recently increasing pressure on water for a wide range of uses other than fisheries has led to damming, river training, water abstractions and water transfers that have substantially altered flood regimes of rivers throughout the world. Such alterations usually have resulted in the loss of fish production and biodiversity. The current emphasis on sustainable development and biodiversity conservation is leading to efforts to mitigate negative impacts of these changes through planning for altered river flows and the release of artificial floods from dams or polder sluices. The typical flood regime contains several characteristics that may influence the recruitment, growth and survival and growth of the individual fish species. Understanding of these characteristics will help determine flow criteria for the maintenance of floodplain fish faunas and design appropriate flood curves that maximize benefits from the water available. . The review is part of the Proceedings of the Second International Symposium on the Management of Large Rivers for Fisheries: Sustaining Livelihoods and Biodiversity in the New Millenium [citation: In: Proceedings of the Second International Symposium on the Management of Large Rivers for Fisheries Volume II. Welcomme R. and T. Petr, Eds., FAO Regional Office for Asia and the Pacific. Bangkok, Thailand. RAP Publication 2004/17]

Published by: Food and Agriculture Organization of the United Nations (FAO), Regional Office for Asia and the Pacific -
Uploaded on: Apr 2005
File size: 319 KB - Language: English
Keyword(s): Assessment , Fisheries
Category: Biota

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