Download or read book Adult Salmonid PIT TAG Returns to Columbia River s Lower Granite Dam written by and published by . This book was released on 1995 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of an analysis of the returns of PIT-tagged Snake River spring chinook and steelhead detected at Lower Granite Dam are summarized. Included is theoretical work on statistical power calculations for tests of return rates. The phrase return rate will be taken to mean return and detection rate. Knowledge that a fish has returned depends upon it being detected at Lower Granite Dam. Some returns are unaccounted for because they go through the navigation lock or manage to go through the adult bypass undetected. (1) Adult PIT tag recoveries to date are informative at least from a qualitative perspective. (2) The tagging levels by geographic region, rearing type, and, for chinook, life history stage have varied considerably since PIT tagging began on the Columbia River system. Early tagging studies were directed at Juvenile problems rather than adult return rates. As a result, comparisons in adult return rates between years, regions, etc., are more difficult. Global conclusions about the effect of potential treatments and/or natural factors, such as region of origin, on adult return rates are difficult to make until a more balanced. more consistent tagging study is implemented. (3) Along the same lines, tagging levels will need to be increased considerably if experiments are to be conducted to determine factors that affect return rates. E.g., approximately 46,000 fish in both the control and the treatment groups need to be PIT-tagged to detect a statistically significant difference with 80% probability. (4) Analysis of the available data suggests that life stage (parr or smolt), rearing type (hatchery or wild), and geographic location all affect the return rates for spring chinook. The data are limited, however. (5) Return rates for Snake River steelhead are roughly an order of magnitude greater than Snake River spring chinook return rates.
Download or read book Adult Salmonid Pit tag Returns to Columbia River s Lower Granite Dam written by Ken Newman and published by . This book was released on 1995 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Analysis of Salmonid Tagging Studies in the Columbia Basin Volume XV Appraisal of the Relationship Between Tag Detection Efficiency at Bonneville Dam and the Precision of In River Survival Estimates of Returning PIT Tagged Chinook Salmon 2000 Technical Report written by and published by . This book was released on 2000 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the advent of the installation of a PIT-tag interrogation system in the Cascades Island fish ladder at Bonneville Dam, this report provides guidance on the anticipated precision of in-river survival estimates for returning adult salmonids, between Bonneville and Lower Granite dams, for various levels of system-wide adult detection probability at Bonneville Dam. Precision was characterized by the standard error of the survival estimates and the coefficient of variation of the survival estimates. The anticipated precision of in-river survival estimates for returning adult salmonids was directly proportional to the number of PIT-tagged smolts released and to the system-wide adult detection efficiency at Bonneville Dam, as well as to the in-river juvenile survival above Lower Granite Dam. Moreover, for a given release size and system-wide adult detection efficiency at Bonneville Dam, higher estuarine and marine survival rates also produced more precise survival estimates. With a system-wide detection probability of P{sub BA} = 1 at Bonneville Dam, the anticipated CVs for in-river survival estimate ranged between 9.4 and 20% with release sizes of 10,000 smolts. Moreover, if the system-wide adult detection efficiency at Bonneville Dam is less than maximum (i.e., P{sub BA}
Download or read book Estuarine Recovery of PIT tagged Juvenile Salmonids from the Lower Granite Dam Transportation Study 1996 written by and published by . This book was released on 1997 with total page 118 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 Federal Register written by and published by . This book was released on 1999-03-23 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Return to the River written by and published by . This book was released on 1996 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish and Wildlife Implementation Plan written by and published by . This book was released on 2003 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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).
Download or read book Columbia River System Operation Review SOR written by and published by . This book was released on 1996 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Agricultural Conservation Practices on Fish and Wildlife written by and published by . This book was released on 2008 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The bibliography is a guide to recent scientific literature covering effects of agricultural conservation practices on fish and wildlife. The citations listed here provide information on how conservation programs and practices designed to improve fish and wildlife habitat, as well as those intended for other purposes (e.g., water quality improvement), affect various aquatic and terrestrial fauna"--Abstract.
Download or read book Status of Snake River Salmon written by and published by . This book was released on 1991 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Analysis of Salmonid Tagging Studies in the Columbia Basin Volume XIV Appraisal of the Relationship Between Tag Detection Efficiency at Bonneville Dam and the Precision in Estuarine and Marine Survival Estimates on Returning PIT Tagged Chinook Salmon 2000 Technical Report written by and published by . This book was released on 2000 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the advent of the installation of a PIT-tag interrogation system in the Cascades Island fish ladder at Bonneville Dam, this report provides guidance on the anticipated precision of salmonid estuarine and marine survival estimates, for various levels of system-wide adult detection probability at Bonneville Dam. Precision was characterized by the standard error of the survival estimates and the coefficient of variation of the survival estimates. The anticipated precision of salmonid estuarine and marine survival estimates was directly proportional to the number of PIT-tagged smolts released and to the system-wide adult detection efficiency at Bonneville Dam, as well as to the in-river juvenile survival above Lower Granite Dam. Moreover, for a given release size and system-wide adult detection efficiency, higher estuarine and marine survivals did also produce more precise survival estimates. With a system-wide detection probability of P{sub BA} = 1 at Bonneville Dam, the anticipated CVs for the estuarine and marine survival ranged between 41 and 88% with release sizes of 10,000 smolts. Only with the 55,000 smolts being released from sites close to Lower Granite Dam and under high estuarine and marine survival, could CVs of 20% be attained with system detection efficiencies of less than perfect detection (i.e., P{sub BA}
Download or read book The Design and Analysis of Salmonid Tagging Studies in the Columbia Basin Volume II Estimating Salmonid Survival with Combined PIT CWT Tagging written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Passive Integrated Transponder (PIT) tags and Coded Wire Tags (CWTs) in combination can provide information about salmonid survival that single tag releases may not. The release and recapture protocol affects which survival and recapture rates can be estimated and the precision of the estimates. For the particular case of Columbia river salmonids tagged with both PIT tags and CWTs, three different release and recapture protocols were evaluated. This report addresses the need to study the fate of salmon smolt in-river and their subsequent return as adults. Double-tagging procedures are investigated where PIT-tags would be used to provide in-river survival data during smolt outmigrations and coded-wire tags (CWT) used to provide adult return information. This report provides statistical models for the analysis of the joint data as well as recommendations on optimal tagging studies. Study costs and stress on smolt can be reduced by only PIT-tagging a subset of all the fish coded-wire-tagged, while retaining the information content and sampling precision.
Download or read book Endangered Species Act Section 7 Consultation written by United States. National Marine Fisheries Service and published by . This book was released on 2000 with total page 1030 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-05 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
