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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... Figure 1.2). In the latter part of the 19th century, salmon became the Figure 1.1 Native American salmon fishing by dipnetting from scaffolding at Celilo Falls, prior to its inundation by The Dalles Dam in 1957. Photo from U.S. Army ...
... Figure provided by Columbia Basin Fish and Wildlife Authority and StreamNet. Nevada, Utah, and Wyoming (Figure 1.3). The river has two major tributaries, the Snake River in southern Idaho and eastern Oregon, and the Willamette River in ...
... (Figure 1.5). The decline of salmon in the Columbia Basin has many causes that will be discussed in later chapters. Briefly however, salmon abundance declined initially as a result of fishing pressure (Figure 1.5; Chapter 9). At about ...
... an artificial migration. Figure 1.6 Map of the Columbia River Basin, showing major rivers, lakes, run-of-the-river dams and storage dams. Figure 1.7 Aerial view of Bonneville Dam, the lowermost of. 1. The Columbia River Salmon Problem 9.
... (Figure 1.7) is now the lowermost in a series of dams that stretches throughout the Columbia Basin. By the time the hydroelectric system was completed in 1975 with the construction of Lower Granite Dam on the Snake River (Figure 1.8), a ...
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Return to the River: Restoring Salmon to the Columbia River Richard Nicholas Williams Недоступно для просмотра - 2006 |