Return to the River: Restoring Salmon Back to the Columbia RiverRichard N. Williams Elsevier, 21 нояб. 2005 г. - Всего страниц: 720 Return to the River will describe a new ecosystem-based approach to the restoration of salmon and steelhead populations in the Columbia River, once one of the most productive river basins for anadromous salmonids on the west coast of North America. The approach of this work has broad applicability to all recovery efforts throughout the northern hemisphere and general applicability to fisheries and aquatic restoration efforts throughout the world. The Pacific Northwest is now embroiled in a major public policy debate over the management and restoration of Pacific salmon. The outcome of the debate has the potential to affect major segments of the region's economy - river transportation, hydroelectric production, irrigated agriculture, urban growth, commercial and sport fisheries, etc. This debate, centered as it is on the salmon in all the rivers, has created a huge demand for information. The book will be a powerful addition to that debate.
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... downstream movement of juvenile salmon and most salmon in the Columbia River continue to return to hatcheries. A more conservative political sentiment has constrained change, while a period of good ocean conditions has led to increased ...
... downstream transportation. In the Snake River, the majority of downstream juvenile salmon migrants are collected at the dams and transported to below Bonneville Dam in barges or trucks. The use of hatcheries to replace spawning habitat ...
... downstream from Hells Canyon Dam, the most upstream point currently accessible to anadromous fish), the middle and lower reaches of the mainstem Columbia River (i.e., downstream from Chief Joseph Dam, the upstream point of current ...
... downstream reservoirs. 2s. Devices to collect juvenile fish before they pass into the turbines and 3 deposit them downstream of the dam provide a benign means of passing the project. 3s. Spill provides the route of hydroelectric project ...
... downstream-migrating smolts because of reduced susceptibility to freshwater predators. The picture that emerges from Hilborn et al.'s (2003) work for Bristol Bay is that it is a system with spatially diverse habitats, whose favorability ...
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Return to the River: Restoring Salmon to the Columbia River Richard Nicholas Williams Недоступно для просмотра - 2006 |