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Author : John W. Beeman
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (476 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis written by John W. Beeman and published by . This book was released on 1990 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robin M. Schrock
Publisher :
ISBN 13 :
Total Pages : 83 pages
Book Rating : 4.:/5 (422 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis written by Robin M. Schrock and published by . This book was released on 1997 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 : John W. Beeman
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (284 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis written by John W. Beeman and published by . This book was released on 1991 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dennis W. Rondorf
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (293 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis written by Dennis W. Rondorf and published by . This book was released on 1989 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 101 pages
Book Rating : 4.:/5 (683 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis Project, 1987-1997 Project Review written by and published by . This book was released on 1997 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assessment of Smolt Condition for Travel Time Analysis Project (Bonneville Power Administration Project 87-401) monitored attributes of salmonid smolt physiology in the Columbia and Snake River basins from 1987 to 1997, under the Northwest Power Planning Council Fish and Wildlife Program, in cooperation with the Smolt Monitoring Program of the Fish Passage Center. The primary goal of the project was to investigate the physiological development of juvenile salmonids related to migration rates. The assumption was made that the level of smolt development, interacting with environmental factos such as flow, would be reflected in travel times. The Fish Passage Center applied the physiological measurements of smolt condition to Water Budget management, to regulate flows so as to decrease travel time and increase survival.
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 : Richard J. Scully
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (319 download)
Download or read book Smolt Condition and Timing of Arrival at Lower Granite Reservoir written by Richard J. Scully and published by . This book was released on 1986 with total page 102 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 :
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 : Robin M. Schrock
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (518 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis written by Robin M. Schrock and published by . This book was released on 2000 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
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 : 146 pages
Book Rating : 4.:/5 (683 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis, 1993-1994 Annual Report written by and published by . This book was released on 1999 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assessment of smolt condition for travel time analysis (ASCTTA) project provided information on the level of smoltification in Columbia River hatchery and wild salmonid stocks to the Fish Passage Center (FPC), for the primary purpose of in-river management of flows.
Author : Alec G. Maule
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (372 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis written by Alec G. Maule and published by . This book was released on 1994 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Øystein Aas
Publisher : John Wiley & Sons
ISBN 13 : 1444348191
Total Pages : 492 pages
Book Rating : 4.4/5 (443 download)
Download or read book Atlantic Salmon Ecology written by Øystein Aas and published by John Wiley & Sons. This book was released on 2011-07-05 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atlantic salmon is one of the most prized and exploited species worldwide, being at the centre of a massive sports fishing industry and increasingly as the major farmed species in many countries worldwide. Atlantic Salmon Ecology is a landmark publication, both scientifically important and visually attractive. Comprehensively covering all major aspects of the relationship of the Atlantic salmon with its environment, chapters include details of migration and dispersal, reproduction, habitat requirements, feeding, growth rates, competition, predation, parasitsm, population dynamics, effects of landscape use, hydro power development, climate change, and exploitation. The book closes with a summary and look at possible future research directions. Backed by the Norwegian Research Council and with editors and contributors widely known and respected, Atlantic Salmon Ecology is an essential purchase for all those working with this species, including fisheries scientists and managers, fish biologists, ecologists, physiologists, environmental biologists and aquatic scientists, fish and wildlife department personnel and regulatory bodies. Libraries in all universities and research establishments where these subjects are studied and taught should have copies of this important publication. Comprehensive and up-to-date coverage of Atlantic Salmon Atlantic Salmon is one of the world's most commercially important species Backed by the Norwegian Research Council Experienced editor and internationally respected contributors
Author : Alec G. Maule
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (326 download)
Download or read book Assessment of Smolt Condition for Travel Time Analysis written by Alec G. Maule and published by . This book was released on 1994 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
