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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... smolts and adults; Goal C relies on improving fish bypass facilities at existing dam structures to incorporate fish behavior, thus making fish passage sufficiently normative to achieve passage and production goals. Specific ...
... 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 for spawning and ...
... smolts during periods of poor ocean conditions is an attempt to stabilize the size of the total run of returning adults. This approach often is unsuccessful, as the experience with Oregon coastal coho demonstrates, and has contributed ...
... smolts (greater than 10 cm) and small as adults (less than 45 cm and less than 2 kg), whereas Wenatchee sockeye tend to be smaller than Osoyoos sockeye as smolts and larger and older as adults. Differences between the attributes of ...
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Return to the River: Restoring Salmon to the Columbia River Richard Nicholas Williams Недоступно для просмотра - 2006 |