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Author : Robin M. Schrock
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (448 download)
Download or read book Assessment and Analysis of Smolt Condition in the Columbia River Basin written by Robin M. Schrock and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (684 download)
Download or read book Assessment and Analysis of Smolt Condition in the Columbia River Basin, 1999 Technical Report written by and published by . This book was released on 1999 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the study was to increase the number of summer steelhead (Oncorhynchus mykiss) from Dworshak National Fish Hatchery that outmigrate by promoting smoltification in a larger proportion of the production release. To achieve this goal, growth was reduced during the winter to produce a smaller size range of fish to eliminate the production of large fish that residualize. A period of accelerated growth prior to release was designed to promote smoltification in all fish, regardless of size. Decreased winter growth was achieved with a combination of reduced ration and short, intermittent feeding periods. Growth rates were not reduced to the expected level in the modified feeding schedule treatment group, control group, or general production fish reared in the same system. Although significant differences in length, weight and condition factor developed between treatment and control groups during December and January, compensatory growth of the treatment fish after return to full rations resulted in fish of the same size from both groups for release. Migration rates of the treatment group were higher than that of the control group, although the difference was not significant. Growth and survival during extended seawater rearing did not differ between the two groups. Smoltification, as measured by gill Na, K-ATPase and seawater survival, were unaffected by a reduction in feed during winter months.
Author : Sally T. Sauter
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (124 download)
Download or read book Assessment of Smolt Condition written by Sally T. Sauter and published by . This book was released on 2004 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Bonneville Power Administration (BPA) has funded the Assessment of Smolt Condition project since 1987. During that time the project changed frequently to meet the information needs of fish managers by conducting studies throughout the Columbia River basin. Past research has examined the influence of smolt physiological development and health on migration rate; differences in development and migration rates of smolts of hatchery or wild origins; and the impacts of hatchery practices on smolt development. The Smolt Assessment Project will not continue beyond 2004, and here we report on the final study of the project in which we used bioenergetics modeling to investigate predation on juvenile salmonids by northern pikeminnow, smallmouth bass, and walleye in the lower Columbia River reservoirs."--From executive summary (page 1).
Author :
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (727 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis, 1990 Annual Report written by and published by . This book was released on 1991 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a part of the Northwest Power Planning Council's Fish and Wildlife Program, the Fish Passage Center collects information on the migrational characteristics of juvenile salmon and steelhead (Oncorhynchus sp.) in the Columbia River basin. This information is collected through the Smolt Monitoring Program, and is used as a tool in the management and evaluation of the Water Budget. The Water Budget is a volume of water used to enhance environmental conditions (flows) to aid in the seaward migration of juvenile salmon and steelhead. Implicit in the Water Budget concept is that by augmenting flows, travel time of juvenile salmonids will be decreased, thereby increasing survival via reductions in delayed migration and exposure to predators. This study was initiated to (1) provide physiological information about the juvenile salmonids used for these travel time estimates, (2) to analyze the physiological data, and (3) to determine if an ''index'' of smolt condition could be developed to aid in management of the Water Budget.
Author :
Publisher :
ISBN 13 :
Total Pages : 115 pages
Book Rating : 4.:/5 (727 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis, 1988 Annual Report written by and published by . This book was released on 1989 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of migration rates and travel times of juvenile salmonids within index reaches of the Columbia River basin are collected through the Smolt Monitoring Program for use by the Fish Passage Center. With increased reliance upon travel time estimates in 1988 by the Fish Passage Center, this study was implemented to monitor the biological attributes of juvenile chinook salmon Oncorhynchus tshawytscha and steelhead trout O. mykiss used for the travel time estimates. The physiological ability of fish to respond to stress was assessed by measuring levels of plasma cortisol, glucose, and chloride before and after a stress-challenge test. The development of smoltification was evaluated by measuring gill NaK-ATPase, plasma thyroxine, purines, and body morphology. Most groups were similar at the hatcheries but differed as the migration to McNary Dam proceeded. The prevalence of bacterial kidney disease (BKD) in spring chinook salmon was evaluated using the enzyme linked immunosorbent assay (ELISA) and fluorescent antibody technique (FAT). Prevalence of BKD in groups tested using the ELISA method was as high as 99% at some downstream locations. A review of indices is presented as a guide to the development of an index of smolt condition and preliminary data are presented. An index could be used as a tool to synthesize information on fish condition to assist with management and evaluation of the Water Budget.
Author : United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development
Publisher :
ISBN 13 :
Total Pages : 568 pages
Book Rating : 4.:/5 (51 download)
Download or read book Columbia River Basin Salmon Recovery Efforts written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1993 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.:/5 (685 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis, 1991-1992 Annual Report written by and published by . This book was released on 1994 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regression techniques were used to determine the effects of several biotic and abiotic variables on the migration rates of juvenile spring chinook salmon and steelhead in the Columbia and Snake rivers. Comparisons of the effects of river flow and smoltification, assessed using gill Na-K ATPase activity, were of primary interest. Day of the year, water temperature, change in flow, condition factor, and fork length were also considered as independent variables. Groups of fish were sampled to assess smoltification 2-3 times per week during the spring outmigrations during 1989-1992. These groups were assumed to be representative of other fish which were PIT-tagged and released as a part of the Smolt Monitoring Program in the Columbia Basin. River flow, gill ATPase activity, condition factor, water temperature, and change in flow were significant variables in regressions predicting the time for juvenile spring chinook salmon to travel between specific points (travel time), whereas river flow was the only significant contributor to models describing travel times of steelhead. Predicted travel times of wild steelhead were shorter than those of hatchery steelhead. River flow was the only variable common to all regression equations. Based on the characteristic, changes in river flow would be the most logical means to decrease travel times of both juvenile spring chinook salmon and steelhead in the Columbia and Snake rivers.
Author :
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.3/5 (121 download)
Download or read book Status of the Interior Columbia Basin written by and published by . This book was released on 1996 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Status of the Interior Columbia Basin is a summary of the scientific findings from the Interior Columbia Basin Ecosystem Management Project. The Interior Columbia Basin includes some 145 million acres within the northwestern United States. Over 75 million acres of this area are managed by the USDA Forest Service or the USDI Bureau of Land Management. A framework for ecosystem management is described that assumes the broad purpose is to maintain the integrity of ecosystems over time and space. An integrated scientific assessment links landscape, aquatic, terrestrial, social, and economic characterizations to describe the biophysical and social systems. Ecosystem conditions within the Basin have changed substantially within the last 100 years. The status of ecosystems is described in terms of current conditions and trends under three broadly defined management options. The scientific information brought forward will be used in decision-making, and may potentially amend Forest Service and Bureau of Land Management plans within the Basin. The information highlighted here represents an integrated view of biophysical and socioeconomic elements at a scale never before attempted. The risks and opportunities are characterized in the broad context of the Basin for managers and the public to use as a foundation for discussion about future management.
Author : National Research Council (U.S.). Committee on Water Resources Management, Instream Flows, and Salmon Survival in the Columbia River Basin
Publisher : National Academy Press
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.3/5 (91 download)
Download or read book Managing the Columbia River written by National Research Council (U.S.). Committee on Water Resources Management, Instream Flows, and Salmon Survival in the Columbia River Basin and published by National Academy Press. This book was released on 2004 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Book News, Inc., Portland, OR (booknews.com).
Author :
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.3/5 (555 download)
Download or read book Columbia River System Operation Review (SOR) written by and published by . This book was released on 1996 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 782 pages
Book Rating : 4.3/5 (129 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert E. Bilby
Publisher : DIANE Publishing
ISBN 13 : 1437912982
Total Pages : 56 pages
Book Rating : 4.4/5 (379 download)
Download or read book Review of Strategies for Recovering Tributary Habitat written by Robert E. Bilby and published by DIANE Publishing. This book was released on 2009-11 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whether tributary habitat improvements have achieved, or are likely to achieve, the goal of recovering conditions favoring the production of salmonids in the Columbia River Basin is unclear. This report reviews the approaches, assessment procedures, and implementation strategies for habit improvement. It examines topics central to the recovery of tributary habitat: (1) the biological objectives related to habitat recovery; (2) the strategies for implementing restoration; (3) the incentives for implementing restoration; (4) the scientific foundation for habitat recovery; and (5) monitoring and evaluation. This review answers the question: What concepts and strategies should be incorporated in habitat recovery actions to improve their chances for success? Illus.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309166268
Total Pages : 260 pages
Book Rating : 4.3/5 (91 download)
Download or read book Managing the Columbia River written by National Research Council and published by National Academies Press. This book was released on 2004-07-27 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flows of the Columbia River, although modified substantially during the twentieth century, still vary considerably between seasons and between years. Lowest flows tend to occur during summer months when demand for irrigation water is at its highest and when water temperatures are greatest. These periods of low flows, high demand, and high temperature are critical periods for juvenile salmon migrating downstream through the Columbia River hydropower system. Although impacts on salmon of any individual water withdrawal may be small, the cumulative effects of numerous withdrawals will affect Columbia River flows and would pose increased risks to salmon survival. The body of scientific knowledge explaining salmon migratory behavior and physiology is substantial, but imperfect, and decision makers should acknowledge this and be willing to take action in the face of uncertainties. In order to provide a more comprehensive water permitting process, the State of Washington, Canada, other basin states, and tribal groups should establish a basin-wide forum to consider future water withdrawal application permits. If the State of Washington issues additional permits for water withdrawals from the Columbia River, those permits should contain provisions that allow withdrawals to be curtailed during critical high-demand periods.
Author :
Publisher :
ISBN 13 :
Total Pages : 115 pages
Book Rating : 4.:/5 (727 download)
Download or read book Smolt Quality Assessment of Spring Chinook Salmon written by and published by . This book was released on 1991 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physiological development and physiological condition of spring chinook salmon are being studied at several hatcheries in the Columbia River Basin. The purpose of the study is to determine whether any or several smolt indices can be related to adult recovery and be used to improve hatchery effectiveness. The tests conducted in 1989 on juvenile chinook salmon at Dworshak, Leavenworth, and Warm Springs National Fish Hatcheries, and the Oregon State Willamette Hatchery assessed saltwater tolerance, gill ATPase, cortisol, insulin, thyroid hormones, secondary stress, fish morphology, metabolic energy stores, immune response, blood cell numbers, and plasma ion concentrations. The study showed that smolt development may have occurred before the fish were released from the Willamette Hatchery, but not from the Dworshak, Leavenworth, or Warm Springs Hatcheries. These results will be compared to adult recovery data when they become available, to determine which smolt quality indices may be used to predict adult recovery. The relative rankings of smolt quality at the different hatcheries do not necessarily reflect the competency of the hatchery managers and staff, who have shown a high degree of professionalism and expertise in fish rearing. We believe that the differences in smolt quality are due to the interaction of genetic and environmental factors. One aim of this research is to identify factors that influence smolt development and that may be controlled through fish husbandry to regulate smolt development. 35 refs., 27 figs., 5 tabs.
Author :
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ISBN 13 :
Total Pages : 390 pages
Book Rating : 4.:/5 (359 download)
Download or read book Report of Sixteenth Interagency Research Coordination Conference written by and published by . This book was released on 1989 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Bonneville Power Administration
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (319 download)
Download or read book Fish & Wildlife Annual Project Summary written by United States. Bonneville Power Administration and published by . This book was released on 1984 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Army. Corps of Engineers. North Pacific Division
Publisher :
ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.:/5 (319 download)
Download or read book Annual Fish Passage Report written by United States. Army. Corps of Engineers. North Pacific Division and published by . This book was released on 1995 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
