Download or read book Analysis of Rebuilding Options for Snake River Spring Chinook Salmon written by Willis E. McConnaha and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Snake River Salmon Recovery written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1995 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Approaches to Assessing Recovery Options for Snake River Chinook Salmon written by and published by . This book was released on 2001* with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proposed Recovery Plan for Snake River Salmon written by and published by . This book was released on 1995 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Delisting Criteria and Rebuilding Schedules for Snake River Spring written by and published by . This book was released on 1993 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: We develop a framework for distinguishing healthy and threatened populations, and we analyze specific criteria by which these terms can be measured for threatened populations of salmon in the Snake River. We review reports and analyze existing data on listed populations of salmon in the Snake River to establish a framework for two stages of the recovery process: (1) defining de-listing criteria, and (2) estimating the percentage increase in survival that will be necessary for recovery of the population within specified time frames, given the de-listing criteria that must be achieved. We develop and apply a simplified population model to estimate the percentage improvement in survival that will be necessary to achieve different rates of recovery. We considered five main concepts identifying de-listing criteria: (1) minimum population size, (2) rates of population change, (3) number of population subunits, (4) survival rates, and (5) driving variables. In considering minimum population size, we conclude that high variation in survival rates poses a substantially greater probability of causing extinction than does loss of genetic variation. Distinct population subunits exist and affect both the genetic variability of the population and the dynamics of population decline and growth. We distinguish between two types of population subunits, (1) genetic and (2) geographic, and we give examples of their effects on population recovery.
Download or read book Analytical Approaches to Assessing Recovery Options for Snake River Chinook Salmon written by Phaedra Budy and published by Createspace Independent Pub. This book was released on 2012-08-23 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The depressed status of Snake River stocks of chinook and steelhead and the recent listings of many salmon stocks in the Columbia Basin have led to several analytical evaluations and management advice aimed at recovery of these stocks. These different analytical reviews address the effectiveness of different hydrosystem options as well as the potential for recovery through improvements that increase survival at other life stages (e.g., habitat, harvest). Hydrosystem options evaluated included status quo, maximizing transportation, and the option of breaching the lower four dams on the Snake River (also called drawdown and natural river options), the main topic of the Lower Snake River Juvenile Salmon Migration Feasibility Report / Environmental Impact Statement (USACE). The first review was completed by PATH (Plan for Testing and Analyzing Hypotheses), an open forum composed of modelers, fishery biologists and statisticians from all three states (Oregon, Washington, and Idaho), the federal government (Army Corps of Engineers (USACE), US Fish and Wildlife Service (USFWS), National Marine Fishery Service (NMFS), Bonneville Power Administration (BPA), the treaty tribes of the Columbia Basin (represented by the Columbia River Inter-tribal Fish Commission -CRITFC), and the Northwest Power Planning Council (NPPC). The PATH approach was based on a decision analysis that showed which management actions are the most robust to remaining uncertainties (i.e. the least risky) and allows a decision to be made with full consideration of uncertainty and risk. PATH analyses were followed by the NMFS effort called CRI- the Cumulative Risk Initiative. CRI analyses explore the demographic effects of hypothetical reductions in mortality at different life stages based on current conditions. PATH and CRI analyses were followed by an analytical comparison of their approaches and results completed by a sub group of PATH composed of scientists from the states of Oregon, Idaho, Washington, CRITFC, and the USFWS. In addition, specific analyses have considered the potential for improvement at certain life stages (e.g., freshwater spawning and rearing; Petrosky et al., in press) and key uncertainties that affect the likely effectiveness of dam breach (e.g., delayed hydrosystem mortality; Budy et al., in review). This annex synthesizes analyses and results PATH, NMFS CRI, and comparative and follow-up analyses which have been completed since and are summarized here and described in greater detail elsewhere. Although the results vary somewhat among approaches, all available science appears to suggest that dam breach has the greatest biological potential for recovering Snake River salmon and steelhead.
Download or read book Proposed Recovery Plan for Snake River Salmon written by United States. National Marine Fisheries Service and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cost effectiveness Analysis for Endangered and Threatened Snake River Salmon Recovery Planning written by Brian E. Garber-Yonts and published by . This book was released on 1996 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis addresses the costs of implementation of the Endangered Species Act (ESA) in the particular case of Snake River chinook salmon. Unlike most previous listings under the act, restoration of Snake River salmon will have impacts on a very broad array of industries and user groups over a region that spans several states and crosses international boundaries. It is indeed projected that the potential economic effects of salmon recovery will outweigh those of every other species listing under the ESA put together. While the case of Snake River salmon may not be entirely representative of ESA listings in general, it is an important test case for economic analysis of species recovery. What is particularly notable about the ESA is the unequivocalness of its mandate: take no action that further threatens an identified species, and take all action necessary to restore the population to a level at which its survival is assured. Upon implementation, however, it becomes immediately obvious that absolute certainty is unattainable, at any cost, and that resources for restoration are indeed limited. Thus arises the question of how to balance cost against risk of extinction. While the explicit balancing of costs and benefits of species recovery is (at least presently) essentially forbidden under the Act, the increasing marginal cost of further increments of risk reduction makes the consideration of the economics of species recovery unavoidable. The approach taken in this thesis is to define a cost effectiveness frontier which identifies the least cost recovery alternatives for each incremental decrease in risk of extinction, i.e define cost as a function of probability of survival. Monte-carlo simulations using a set of salmon life-cycle models are employed to assess the probability of survival achievable under a broad range of recovery alternatives. Alternatives range from elimination of sport and commercial harvest of Snake River chinook, alternative operation of hydropower facilities in the Snake and Columbia Basins, including removal of one or more dams on the Snake River, increased barge transportation of outmigrating juvenile salmon, improvement in upstream passage and spawning habitat, and a number of others. The alternatives considered span a range of costs and degrees of political acceptability. Cost assessments are largely gathered from ongoing federal and state planning analyses and include both direct and indirect costs of implementation. In addition to the level of costs under each alternative, this analysis also addresses the distribution of economic impacts across different user groups in the Columbia and Snake River Basin.
Download or read book Proposed Amendments to the Columbia River Basin Fish and Wildlife Program main report written by and published by . This book was released on 1992 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Delisting Criteria and Rebuilding Schedules for Snake River Spring summer Chinook Fall Chinook and Sockeye Salmon written by Steven P. Cramer and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Snake River Salmon Recovery written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1995 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combined Effects Analysis for Snake River Spring summer Chinook Salmon and Snake River Fall Chinook Salmon During 1993 Section 7 Consultations written by United States. National Marine Fisheries Service. Northwest Region and published by . This book was released on 1993 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Columbia River System Operation Review SOR written by and published by . This book was released on 1996 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lower Snake River Juvenile Salmon Migration Feasibility Report written by and published by . This book was released on 2002 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of Lower Snake River Hydrosystem Alternatives on Survival and Recovery of Snake River Salmonids Appendix to the U S Army Corps of Engineers Lower Snake River Juvenile Salmonid Migration Feasibility Study written by Northwest Fisheries Science Center (U.S.) and published by DIANE Publishing. This book was released on 2001 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Return to the River written by Richard N. Williams and published by Elsevier. This book was released on 2005-11-21 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. - A 15 year collaboration by a diverse group of scientists working on the management and recovery of salmon, steelhead trout, and wildlife populations in the Pacific Northwest - Includes over 200 figures, with four-color throughout the book - Discusses complex issues such as habitat degradation, juvenile survival through the hydrosystem, the role of artificial production, and harvest reform
Download or read book Columbia and Snake Rivers 1992 Salmon Flow Measures ID OR WA Options Analysis Document written by and published by . This book was released on 1992 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
