Characteristics of Anadromous Steelhead and Sea-run Cutthroat at Beaver Creek and Skamania Hatcheries PDF Download
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Author: James B. Byrne
Publisher:
ISBN:
Category : Coastal cutthroat trout
Languages : en
Pages : 58
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Author: James B. Byrne
Publisher:
ISBN:
Category : Coastal cutthroat trout
Languages : en
Pages : 58
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Author: Darwin E. Jones
Publisher:
ISBN:
Category : Coastal cutthroat trout
Languages : en
Pages : 44
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Author: Montgomery Watson
Publisher:
ISBN:
Category : Anadromous fishes
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 76
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 668
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Author: Library of Congress. Exchange and Gift Division
Publisher:
ISBN:
Category : State government publications
Languages : en
Pages : 496
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June and Dec. issues contain listings of periodicals.
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ISBN:
Category :
Languages : en
Pages : 52
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The Augmented Fish Health Monitoring Project was funded by the Bonneville Power Administration (BPA) with the mandate to collect fish health data on the anadromous fish stocks of the Columbia River Basin in a standardized manner. The Washington Department of Wildlife began the project in 1986. Cumulative data and a final summary for this project are presented in this document. Fish stocks were examined monthly for length, weight, and health status at all Washington Department of Wildlife Columbia River Basin hatcheries. Assays for specific fish pathogens were conducted on all stocks of broodfish and smolts in the study area. Pathogens of interest were replicating viral agents, erythrocytic inclusion body syndrome virus (EIBSV), and Renibacterium salmoninarum. Sea-run cutthroat (SCT) were also sampled midway through the rearing cycle for R. salmoninarum. Juvenile fish were examined for the presence of any pathogen. Assays for Myxobolus cerebralis were conducted on fish stocks in several locations along the Columbia River. An organosomatic index analysis was made on each stock of smolts at the Cowlitz and Wells hatcheries. Results of the organosomatic index analysis were consistent between the years at each facility. However, the fish reared at Cowlitz displayed tissue changes associated with ceratomyxosis while those reared at Wells had a more desirable color and quality. Cell culture assays for viral agents in broodfish were positive for infectious hematopoeitic necrosis virus (IHNV) in all stocks at the Cowlitz Hatchery four out of five years in the study. Other stations were less consistent over the years. Only the sea-run cutthroat stock spawned at Beaver Creek was negative for any virus. Infectious pancreatic necrosis virus (IPNV) was isolated from summer-run steelhead (SS) broodfish at Wells in 1989 and 1991 and at Yakima in 1991. Inclusions that are characteristic of EIBSV were found in red blood cells of brood fish from the Wells Hatchery in 1990 and 1991. Data collected on EIBSV during the first two years of the project cannot be compared with the later three years due to changes in laboratory protocol. Isolations of IHNV in smolts were made from Cowlitz and Skamania hatcheries and the Gobar Rearing Pond. Epizootics of IHN occurred at Lyons Ferry, Beaver Creek, Cowlitz and Skamania hatcheries during the project, EIBSV inclusions were identified in very low levels from smolts from Beaver Creek, Chelan, Cowlitz, Eastbank, and Ringold. Assays for R. salmoninarum on broodfish and smolts revealed very low levels of infection and the disease was not a problem. Enteric redmouth disease was not observed in the project area. Cytophaga psychrophila was a chronic problem in young fish at Vancouver, Beaver Creek and Cowlitz hatcheries. Ceratomyxa Shasta was the only reportable parasite observed in the fish within the study area and caused yearly outbreaks of ceratomyxosis at the Cowlitz Hatchery. Fish at the Beaver Creek Hatchery were treated for furunculosis three of the five years of the project. An ozone water treatment plant has been installed to minimize the disease. Flow and density indexes and feed conversion did not vary significantly at the hatcheries during this project. Egg mortality averaged 12.94% throughout the project with a range from 4.39% to 29.10%. The mean fry mortality during the project was 15.08% with a range of 2.01 to 37.43%. The overall mortality for early rearing was 20.43%. Prespawning broodstock mortality was recorded for SS and SCT and averaged 5.18% with a range from 0 to 38.8%. Fungal invasion was the primary cause of death in adult fish. Epizootics of furunculosis, ceratomyxosis, bacterial coldwater disease, and IHN occurred during the project. Fewer cases were reported in more recent years. The BPA augmented fish health project helped WDW identify problem areas in fish health while they were occurring. This knowledge allowed us to develop strategies for improved fish quality. Overall the project has been invaluable in assisting us in the improvement of the health of our fish.
Author: Ken Schultz
Publisher: For Dummies
ISBN: 9781620458464
Category : Nature
Languages : en
Pages : 0
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The definitive field guide to North American saltwater fish-from the absolute authority on sportfishing Before you head out to the open seas, listen up: Your tackle box is not complete without Ken Schultz's Field Guide to Saltwater Fish! Written by one of the foremost experts in sportfishing, this colorful reference provides anglers and fish enthusiasts of all levels an easy-to-use, indispensable guide to help you identify and learn about the most common species found off the North American coastlines-from albacore to yellowtail. Based on the award-winning reference book Ken Schultz's Fishing Encyclopedia, this handy field guide compresses the essence of its bestselling predecessor into a more manageable, compact size. Arranged alphabetically by species, each entry covers the identification, size/age, distribution, habitat, life history/behavior, and feeding habits of each fish. This fully illustrated, full-color guide makes it easy to identify what's at the end of your line. You'll learn how to distinguish an Atlantic mackerel from a Spanish mackerel, for instance; why you might mistake a cobia for a shark or a remora; how the red grouper's saddle spot will help you tell it apart from a Nassau grouper; and so much more. Written for the 16 million people who enjoy saltwater fishing, Ken Schultz's Field Guide to Saltwater Fish features: 227 of the most common saltwater fish Large, full-color illustrations to help you identify your catch Approachable organization in a compact, take-along size A comprehensive glossary that explains the terms used in the species profiles Overview and anatomy sections written in layman's terms Ken Schultz's Field Guide to Saltwater Fish is a must-have for any fan of America's favorite pastime: fishing!
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309176204
Category : Technology & Engineering
Languages : en
Pages : 472
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Book Description
The importance of salmon to the Pacific Northwestâ€"economic, recreational, symbolicâ€"is enormous. Generations ago, salmon were abundant from central California through Idaho, Oregon, and Washington to British Columbia and Alaska. Now they have disappeared from about 40 percent of their historical range. The decline in salmon numbers has been lamented for at least 100 years, but the issue has become more widespread and acute recently. The Endangered Species Act has been invoked, federal laws have been passed, and lawsuits have been filed. More than $1 billion has been spent to improve salmon runsâ€"and still the populations decline. In this new volume a committee with diverse expertise explores the complications and conflicts surrounding the salmon problemâ€"starting with available data on the status of salmon populations and an illustrative case study from Washington state's Willapa Bay. The book offers specific recommendations for salmon rehabilitation that take into account the key role played by genetic variability in salmon survival and the urgent need for habitat protection and management of fishing. The committee presents a comprehensive discussion of the salmon problem, with a wealth of informative graphs and charts and the right amount of historical perspective to clarify today's issues, including: Salmon biology and geographyâ€"their life's journey from fresh waters to the sea and back again to spawn, and their interaction with ecosystems along the way. The impacts of human activitiesâ€"grazing, damming, timber, agriculture, and population and economic growth. Included is a case study of Washington state's Elwha River dam removal project. Values, attitudes, and the conflicting desires for short-term economic gain and long-term environmental health. The committee traces the roots of the salmon problem to the extractive philosophy characterizing management of land and water in the West. The impact of hatcheries, which were introduced to build fish stocks but which have actually harmed the genetic variability that wild stocks need to survive. This book offers something for everyone with an interest in the salmon issueâ€"policymakers and regulators in the United States and Canada; environmental scientists; environmental advocates; natural resource managers; commercial, tribal, and recreational fishers; and concerned residents of the Pacific Northwest.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 340
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