Download or read book Evaluation of Factors Affecting Migration Success of Adult Sockeye Salmon Oncorhynchus Nerka in the Yakima River Washington 2020 written by Tobias J. Kock and published by . This book was released on 2021 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Water Temperature Effects on Adult Sockeye Salmon Oncorhynchus Nerka Behavior in the Yakima River Washington 2019 written by Tobias J. Kock and published by . This book was released on 2020 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Factors Affecting Sockeye Salmon Oncorhynchus Nerka Production in Ozette Lake WA written by John Paul Blum and published by . This book was released on 1988 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Alternative Models of Adult Fraser River Sockeye Salmon Oncorhynchus Nerka Migration in Coastal Areas written by Miguel Pascual and published by . This book was released on 1989 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migration of Adult Sockeye Salmon in Puget Sound and Fraser River written by Henry O'Malley and published by . This book was released on 1919 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migration and Movement Patterns of Adult Sockeye Salmon Oncorhynchus Nerka in Lake Washington written by Jennifer Newell and published by . This book was released on 2005 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Regional and Climate driven Factors Affecting the Migrations of Sockeye Salmon Oncorhynchus Nerka Smolts in Alaska written by Christopher R. Dailey and published by . This book was released on 2020 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The downstream migration of salmon smolts is triggered by a combination of responses to multiple environmental indicators, imposed on internal circannual rhythms, that result in variation between populations in timing. Using long-term data on daily smolt counts and associated environmental variables from multiple sources across Alaska, I tested the hypothesis that variation in migration timing between different sockeye salmon populations could be explained by differences in local environmental conditions. I first analyzed the peak, width, and interannual variation of the smolt migration period for eight populations from southwestern and southcentral Alaska. I then modeled the median emigration date and width of the emigration period as a function of stream temperature, air temperature, and precipitation to assess how each population responds to combinations of seasonal environmental cues that serve as indicators for the onset of downstream migration or conditions in the recipient environment (sea surface temperature). Lastly, I used the results of my analysis to identify spatial variation in the response of distinct salmon populations to environmental factors and identify trends in the migration timing of those populations. Through my analysis, I found that sea surface temperature and freshwater temperature are the primary environmental factors that control median smolt emigration date, while the width of the smolt emigration window is influenced primarily by freshwater temperatures and precipitation, with significant site-by-site variation.
Download or read book Migration Of Adult Sockeye Salmon In Puget Sound And Fraser River written by Henry O'Malley and published by Sagwan Press. This book was released on 2015-08-27 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Etiology of Sockeye Salmon virus Disease written by Raymond W. Guenther and published by . This book was released on 1959 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of the Growth Production and Migration of Sockeye Salmon Oncorhynchus Nerka in Fern Lake After the Addition of Oyster Shell written by Jerry Fredrick Jatho and published by . This book was released on 1972 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age Composition Size Migration Timing and Estimation of Smolt to adult Survival of Natural origin Sockeye Salmon Oncorhynchus Nerka in the Wenatchee River WA Watershed 1997 to 2019 written by Braden Judson and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Lake Wenatchee is the dominant producer of Sockeye Salmon (Oncorhynchus nerka) within Washington State, and one of only two self-sustaining populations of Sockeye Salmon within the Columbia River watershed. The Lake Wenatchee Sockeye population is monitored by Chelan Public Utility District, and those data are used to estimate smolt-to-adult returns (SAR) for natural origin Sockeye as an index of marine survival"--Abstract.
Download or read book The Migratory Pattern of Adult Sockeye Salmon Oncorhynchus Nerka in Bristol Bay as Related to the Distribution of Their Home river Waters written by Richard R. Straty and published by . This book was released on 1969 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: The individual stocks of sockeye salmon that make up the annual spawning migration to the Bristol Bay region of Western Alaska are produced in the lakes and streams of ten major river systems, which discharge into the bay over a shoreline distance of 120 miles. The hypothesis adopted in this study was that the bay distribution of the waters from these river systems and controlling factors such as tide, wind and bottom topography determine the distribution of the individual stocks of sockeye salmon in Bristol Bay. This hypothesis was based on the premise that mature sockeye salmon return to their river system of origin to spawn and in doing so utilize recognizable characteristics of their home-river waters to guide them to its source. Hydrographic studies were carried out in upper Bristol Bay to determine the seaward course and distribution of the waters of major sockeye salmon-producing river systems draining into Bristol Bay. These studies included determination of the vertical and horizontal salinity distribution in the upper bay, tracking and plotting the distribution and course of individual river waters, which had been tagged with Rhodamine B dye, during flood and ebb tide and plotting the seaward course of plastic drift cards released at various strategic locations in upper Bristol Bay. From the results of these studies the course and distribution of the waters of each major sockeye salmon-producing river system was described for upper Bristol Bay. The distribution and migration routes of the individual stocks of Bristol Bay sockeye salmon were determined from analysis of the results of exploratory fishing operations carried out by research vessels of the United States and offshore and inshore adult sockeye salmon tagging studies conducted by the United States and Japan. The results of this analysis showed that the main migration route of all stocks of Bristol Bay sockeye is in the offshore waters of the southern half of the entrance to the bay and in the bay itself. All stocks remain in the offshore waters until within 20 to 50 miles of their home-river systems. They were, however, already beginning, to segregate according to, river of origin in the offshore waters when still as much as 150 miles from the mouths of their home-river systems. From this point to the head of Bristol Bay there was a progressive segregation of sockeye salmon stocks according to their river of origin. From these studies the general distribution and migration route of all major stocks of Bristol Bay sockeye salmon was described and illustrated on a chart of the area. Comparison of the distribution of the major river-system waters with that of their respective sockeye salmon stocks showed that the distribution of river water in outer Bristol Bay did not conform to the distribution of sockeye salmon whereas in the upper bay the individual sockeye stocks assumed a distribution which was very similar to that of their river-system waters. The conclusions reached were that the migration route, distribution and initial segregation of sockeye- stocks in the clear offshore waters of Bristol Bay are not influenced by the distribution of river water, but once in the turbid upper bay these features must somehow be related to the distribution of home-river waters and the recognizable properties they contain.
Download or read book Behavior and Survival of Radio tagged Sockeye Salmon During Adult Migration in the Snake and Salmon Rivers written by Matthew L. Keefer and published by . This book was released on 2008 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Conservation efforts for critically endangered Snake River sockeye salmon (Oncorhynchus nerka) have been partially hindered by high en route mortality of adult fish during their ~1,450 kilometer freshwater spawning migration. Through the 1990s, Snake River sockeye were poised on the brink of extinction, with annual returns averaging fewer than five fish. A moderate recovery began in 1999, when the first adult progeny from a captive broodstock program returned from the ocean. The largest run in several decades returned in 2000, with 299 fish counted at Lower Granite Dam on the Snake River. Taking advantage of this rare opportunity, we collected and radio-tagged 31 adults at the dam and then monitored their migration behavior and survival over ~750 kilometers. Tagged fish migrated rapidly through the Lower Granite reservoir and successively more slowly through each upstream reach. Successful and unsuccessful fish migrated at similar rates through the lower study reaches, after which unsuccessful fish migrated significantly more slowly than successful fish. Survival dramatically declined late in the run after mean water temperatures exceeded 21 °C and daily maximums reached 23-24 °C. Several fish displayed thermoregulatory behavior during the warmest period, using cooler water from tributaries including the Clearwater and Grande Ronde rivers. Fish with injuries at the time of tagging (e.g., head injuries, lesions, gill net marks) were less likely to survive than fish without notable injuries. Notably, fish with injuries were concentrated in the later portion of the run, suggesting possible condition-dependent delay during migration in the lower Columbia and Snake rivers. Overall, results strongly suggest indirect sublethal temperature effects, possibly mediated by poor initial fish condition. Migration in water temperatures near tolerance thresholds may exacerbate mortality risks, and these risks are most likely for fish with later migration timing. In fact, sockeye salmon counts at Ice Harbor indicate that there may have been recent selection against later-timed adult sockeye salmon. High en route mortality of Snake River sockeye will likely persist or increase given projections for continued warming of their migration corridor."--Abstract (page iv).
Download or read book A Virus Disease of Sockeye Salmon written by Stanley W. Watson and published by . This book was released on 1954 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migratory Routes of Adult Sockeye Salmon Oncorhynchus Nerka in the Eastern Bering Sea and Bristol Bay Classic Reprint written by Richard R. Straty and published by Forgotten Books. This book was released on 2017-03-29 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Migratory Routes of Adult Sockeye Salmon, Oncorhynchus Nerka, in the Eastern Bering Sea and Bristol Bay The establishment of fishing areas, the determination when fishing may be permitted, and the effect of exploiting simultaneously several stocks of sockeye salmon require knowledge of the migratory pattern of the individual stocks comprising the run to Bristol Bay during spaw ning migration. Various mark-and-recapture experiments and exploratory fishing in the eastern Bering Sea and Bristol Bay provide a picture of the migratory pattern of Bristol Bay sockeye salmon from approximately long. 17ow to the head of Bristol Bay. 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 Factors Affecting Sockeye Salmon Oncorhynchus Nerka Growth in Four Lakes of the Fraser River System written by J. C. Goodlad and published by . This book was released on 1974 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Migratory Pattern of Adult Sockeye Salmon Oncorhynchus Nerka in Bristol Bay as Related to the Distribution of Their Home river Waters written by Richard Robert Straty and published by . This book was released on 1969 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
