Download or read book 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 1963 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Forgotten Books. This book was released on 2018-02-27 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.
Download or read book Fall Chinook Salmon Returns to Hatcheries in the Bonneville Dam Pool Area 1945 60 written by Eugene M. Maltzeff and published by . This book was released on 1963 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migratory Behavior of Adult Spring Chinook Salmon in the Willamette River and Its Tributaries written by and published by . This book was released on 1994 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ninety Years of Salmon Culture at Little White Salmon National Fish Hatchery written by William Roland Nelson and published by . This book was released on 1990 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paper discribing the history of the Little White Salmon National Fish Hatchery (located on the Little White Salmon River, a tributary of the Columbia River in Oregon) built in 1896 to supplement the run of tule fall chinook salmon (Oncorhynchus tshawytscha) and now dedicated to rearing transplanted fall and spring chinook salmon stocks.
Download or read book Role of Coleman Hatchery in Maintaining a King Salmon Run written by Oliver B. Cope and published by . This book was released on 1957 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study revealed that king salmon released in the spring from the hatchery were heavier than those released in the fall, but fall released fish had entered the commercial fishery in greater numbers than spring-released fish.
Download or read book Winter run Chinook Salmon in the Sacramento River California with Notes on Water Temperature Requirements at Spawning written by Daniel W. Slater and published by . This book was released on 1963 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salmon specialists throughout the Pacific Coast indicate that the winter-run Chinook salmon is restricted to California's Sacramento River system. The characteristics and habits of the race are unique in the following respects: Fresh-water holding period, December to April; spawning period, April into July. The up-migration is concurrent with the late segments of the fall run, but the adults are distinguishable by the green condition of the gonads. The down-migration is concurrent with that of the spring-run fry, but the migrants are 2-inch or larger fingerlings. Evidence is lacking to determine whether there is an earlier down-migration of fry. The race appears to hold great promise as a stock to be introduced into areas where May-August temperatures are 42.5 degrees - 57.5 degrees F., for it supports superb angling during the fresh-water holding period. Water temperatures in May through August are seen as the factor limiting the natural extension of the range of the race.
Download or read book Willamette Spring Chinook Salmon written by and published by . This book was released on 1996 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ninety Years of Salmon Culture at Little White Salmon National Fish Hatchery written by William Roland Nelson and published by . This book was released on 1990 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paper discribing the history of the Little White Salmon National Fish Hatchery (located on the Little White Salmon River, a tributary of the Columbia River in Oregon) built in 1896 to supplement the run of tule fall chinook salmon (Oncorhynchus tshawytscha) and now dedicated to rearing transplanted fall and spring chinook salmon stocks.
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.
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:
Download or read book Fluctuations in Abundance of Columbia River Chinook Salmon 1928 54 written by Harold A. Gangmark and published by . This book was released on 1956 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Scientific Report written by and published by . This book was released on 1963 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation Into the Factors Influencing Escapement Estimation for Chinook Salmon Oncorhynchus Tshawytscha on the Lower Shuswap River British Columbia microform written by Nicole Dorothy Trouton and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The area-under-the-curve (AUC), method based on helicopter visual enumeration, is a commonly used technique to estimate escapement of chinook salmon (Oncorhynchus tshawytscha) for the Fraser River and its tributaries. Two key factors associated with this method are survey life and observer efficiency. The survey life currently assumed by Fisheries and Oceans Canada (DFO) for Thompson Basin streams is seven days and for most counting flights the assumed observer efficiency is 100%. Telemetry and tower observations were used to estimate annual (2000-2002) survey lives for male (telemetry) and female (telemetry and tower observation) chinook salmon in the Lower Shuswap River. Mark-recapture based survey lives were directly estimated by dividing the mark-recapture escapement estimate by the AUC estimate of total spawner days. Observer efficiency was estimated by comparing observer counts from helicopters to counts from photographs. Various combinations of total fish counts, observer efficiencies, and survey lives were used in AUC escapement estimates, and compared to mark-recapture and peak count estimates. Survey lives varied annually. Many of the estimated mean survey lives were significantly less than seven days; mark-recapture based survey lives were generally less than those estimated from telemetry and observations from towers; and mean survey lives for males were higher than for females. The mean observer efficiency of helicopter enumeration was 97% (95% CI is * 6%), this is not significantly different than the 100% assumed by DFO.
Download or read book Salmon Without Rivers written by James A. Lichatowich and published by Island Press. This book was released on 2001-03-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fundamentally, the salmon's decline has been the consequence of a vision based on flawed assumptions and unchallenged myths.... We assumed we could control the biological productivity of salmon and 'improve' upon natural processes that we didn't even try to understand. We assumed we could have salmon without rivers." --from the introduction From a mountain top where an eagle carries a salmon carcass to feed its young to the distant oceanic waters of the California current and the Alaskan Gyre, salmon have penetrated the Northwest to an extent unmatched by any other animal. Since the turn of the twentieth century, the natural productivity of salmon in Oregon, Washington, California, and Idaho has declined by eighty percent. The decline of Pacific salmon to the brink of extinction is a clear sign of serious problems in the region. In Salmon Without Rivers, fisheries biologist Jim Lichatowich offers an eye-opening look at the roots and evolution of the salmon crisis in the Pacific Northwest. He describes the multitude of factors over the past century and a half that have led to the salmon's decline, and examines in depth the abject failure of restoration efforts that have focused almost exclusively on hatcheries to return salmon stocks to healthy levels without addressing the underlying causes of the decline. The book: describes the evolutionary history of the salmon along with the geologic history of the Pacific Northwest over the past 40 million years considers the indigenous cultures of the region, and the emergence of salmon-based economies that survived for thousands of years examines the rapid transformation of the region following the arrival of Europeans presents the history of efforts to protect and restore the salmon offers a critical assessment of why restoration efforts have failed Throughout, Lichatowich argues that the dominant worldview of our society -- a worldview that denies connections between humans and the natural world -- has created the conflict and controversy that characterize the recent history of salmon; unless that worldview is challenged and changed, there is little hope for recovery. Salmon Without Rivers exposes the myths that have guided recent human-salmon interactions. It clearly explains the difficult choices facing the citizens of the region, and provides unique insight into one of the most tragic chapters in our nation's environmental history.
Download or read book Pacific Salmon their Ecosystems written by Deanna J. Stouder and published by Springer Science & Business Media. This book was released on 1997 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text examines the ecology of the Pacific salmon
Download or read book Computation and Interpretation of Biological Statistics of Fish Populations written by William Edwin Ricker and published by . This book was released on 2010-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computation and Interpretation of Biological Statistics of Fish Populations, first published in 1975, deals with the general field of biological statistics of fish populations. It is a compilation of the more important procedures used to estimate abundance, age composition, rate of growth, and mortality rates in fish populations, with working examples of all the computations. Computation and Interpretation of Biological Statistics of Fish Populations is one of the most highly cited scientific references in the field of fisheries.
