Instream Flow Needs to Protect Fishery Resourcesby James M. Loar, Oak Ridge Natl Lab, Oak Ridge, TN, USA,
Michael J. Sale, Oak Ridge Natl Lab, Oak Ridge, TN, USA,
Glenn F. Cada, Oak Ridge Natl Lab, Oak Ridge, TN, USA,
Abstract: Numerous methods have been developed over the past several decades to assess the effects of flow regulation on fishery resources and to provide a basis for the determination of suitable instream flow regimes to protect these resources. Such methods are inflexible, are difficult to defend from an ecological basis. Future research must emphasize the role of all factors that limit population size if we are to be successful in including hydrologic parameters in fish production models. No method is currently capable of adequately predicting responses of fish populations to flow modifications. Selection of an appropriate method for evaluating potential impacts of water development projects must consider limitations of the various methods, project design and operation, and status of the fishery resources and current management objectives.
Subject Headings: Fish management | Instream flow | Resource management | Regulated flow | Management methods | Water resources | Hydrologic models | Project management
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