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Analysis of historical nutrient data for Lake Mead indicates that the fertility of the reservoir has decreased which may be the cause for a corresponding decline in the largemouth bass population. However, it appears that fertility can be manipulated by altering the operation of the dam. The depletion of nutrients in the euphotic zone by phytoplankton and subsequent accumulation in the hypolimnion during summer and fall provide a natural nutrient gradient from which water of varying fertility can be drawn for discharge. This combined with alterations in the depth or seasonal pattern of discharge can possibly be used to enhance fertility and bass production in Lake Mead.


Environmental monitoring; Freshwater fishes; Hoover Dam (Ariz.-Nev); Hydrodynamics; Lake Mead (Ariz. and Nev.); Limnology; Phytoplankton; Water analysis; Water quality


Aquaculture and Fisheries | Biochemistry | Biology | Environmental Health and Protection | Environmental Indicators and Impact Assessment | Environmental Monitoring | Environmental Sciences | Fresh Water Studies | Natural Resources Management and Policy | Sustainability




"Paper presented at The Mitigation Symposium, Colorado State University, Fort Collins, Colorado, July 16-20, 1979."--P. 296