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Book Fall Chinook Oncorhynchus Tshawytscha

Download or read book Fall Chinook Oncorhynchus Tshawytscha written by Jim Waldvogel and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Age analysis for 22 years (1980 excluded) showed that the overall percentages for female spawners was 53% (4-year olds), 38% (3-year olds), and 9% (5-year olds). The age composition of male spawners showed a high degree of variability throughout the study. Male chinook of age 2, 3 and 4 were dominant annually, but 5- and 6- year old fish were present in most spawning seasons. All chinook carcasses from which scales were collected were also measured for length (over 120 samples in 22 years). Decreases in mean length were documented for all age classes for each of the El Nino episodes that occurred during the study (1982-1984; 1992-1993; 1997-1998). The decreases in mean length appeared to carry forward for each cohort's age class. The total number of chinook redds was tabulated by counting "fresh" redds during weekly spawning surveys. The mean number of redds was 117 for the 23-year period with a mean of 0.9 redds per adult salmon or 1.8 redds per female.

Book Spawning and Abundance of Fall Chinook Salmon Oncorhynchus Tshawytscha in the Hanford Reach of the Columbia River 1948 1988

Download or read book Spawning and Abundance of Fall Chinook Salmon Oncorhynchus Tshawytscha in the Hanford Reach of the Columbia River 1948 1988 written by and published by . This book was released on 1990 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hanford Reach of the Columbia River provides the only major spawning habitat for the upriver bright (URB) race of fall chinook salmon in the mainstem Columbia River. Hanford Site biologists have conducted aerial surveys of spawning salmon in the Hanford Reach since 1948. This report summarizes data on fall chinook salmon spawning in the Hanford Reach and presents a discussion of factors that may affect population trends. Most data are limited to fisheries agency reports and other working documents. Fisheries management practices in the Columbia River system have changed rapidly over the last decade, particularly under requirements of the Pacific Northwest Power Planning and Conservation Act of 1980. New information has been generated and included in this report. 75 refs., 17 figs., 11 tabs.

Book Factors Influencing the Return of Fall Chinook Salmon Oncorhynchus Tshawytscha To Spring Creek Hatchery Classic Reprint

Download or read book Factors Influencing the Return of Fall Chinook Salmon Oncorhynchus Tshawytscha To Spring Creek Hatchery Classic Reprint written by Charles O. Junge Jr. and published by . This book was released on 2016-06-28 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Factors Influencing the Return of Fall Chinook Salmon (Oncorhynchus Tshawytscha) To Spring Creek Hatchery Normally the disease makes its first appear ance shortly after the fry have hatched. Johnson also reports an occasional occurrence just prior to hatching but has never noted it earlier in the egg stage. Yolk material has been found in the body cavities long after the fish have started feeding. A cause and a cure for the disease have not been discovered. Delayed mortality after the release of the fish has never been investigated. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Book Predation by Sculpins on Fall Chinook Salmon Oncorhynchus Tshawytscha Fry of Hatchery Origin Classic Reprint

Download or read book Predation by Sculpins on Fall Chinook Salmon Oncorhynchus Tshawytscha Fry of Hatchery Origin Classic Reprint written by Benjamin G. Patten and published by Forgotten Books. This book was released on 2018-02-22 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Predation by Sculpins on Fall Chinook Salmon, Oncorhynchus Tshawytscha, Fry of Hatchery Origin At the time of release, the 1961 brood aver aged 59 mm. Fork length (range, 40-80 mm.) and averaged 469 salmon per kilogram; the 1962 brood averaged mm. Fork length (range, 38-79 mm.) and averaged 447 salmon per kilogram. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Book Relation of Scale Characteristics to River of Origin in Four Stocks of Chinook Salmon oncorhynchus Tshawytscha in Alaska

Download or read book Relation of Scale Characteristics to River of Origin in Four Stocks of Chinook Salmon oncorhynchus Tshawytscha in Alaska written by Richard G. Rowland and published by . This book was released on 1969 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Study of Factors Influencing the Return of Fall Chinook Salmon Oncorhynchus Tshawytscha to Spring Creek Hatchery

Download or read book Study of Factors Influencing the Return of Fall Chinook Salmon Oncorhynchus Tshawytscha to Spring Creek Hatchery written by Charles O. Junge and published by . This book was released on 1960 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Comparison of the Rate of Growth of Fall Chinook Salmon Oncorhynchus Tshawytscha in Freshwater and Salt Water Under Similar Conditions of Light Water Temperature and Diet

Download or read book Comparison of the Rate of Growth of Fall Chinook Salmon Oncorhynchus Tshawytscha in Freshwater and Salt Water Under Similar Conditions of Light Water Temperature and Diet written by Abu Bakarr Kamara and published by . This book was released on 1973 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: