water rich and this is these spatial and temporal variations in water quantity necessitated the storage of water to meet the water demands, and reservoirs are the resultant storage structures of surface waters. These man-made ecosystems serve as a basis for large-scale water management systems without parallel in nature. They are rarely and or never created for fishery purposes but are constructed for flood control, hydroelectric power generation, irrigation and navigation, however, especially in India, the secondary use of these impounded waters for fisheries is gaining much importance now-a-days in the wake of steadily declining trends in marine

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