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Occurrence Of The Protozoan Parasite Ceratomyxa Shasta Among Salmonid Fishes In Oregon Waters
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Book Synopsis Occurrence of the Protozoan Parasite Ceratomyxa Shasta Among Salmonid Fishes in Oregon Waters by : James Edward Sanders
Download or read book Occurrence of the Protozoan Parasite Ceratomyxa Shasta Among Salmonid Fishes in Oregon Waters written by James Edward Sanders and published by . This book was released on 1967 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was initiated to determine the incidence, distribution and species of fish affected by Ceratomyxa shasta in Oregon waters. Returning adult Pacific salmon and steelhead trout were chosen for the survey because they were known to be susceptible to infection. The parasite was also believed to be an important cause of prespawning losses. All coho salmon samples obtained from the Columbia River basin contained individuals infected with Ceratomyxa shasta. The infection was greatest at the Bonneville and Sandy hatcheries, where approximately 75 percent of the fish examined were infected. The only coastal sample found to contain coho salmon infected with Ceratomyxa shasta was taken from the Nehalem River. Fish that reached the hatchery but died before the start of spawning operations were obtained from the Klaskanine and Sandy hatcheries. The incidence of Certaomyxa shasta infected fish in these samples was in both cases greater than in samples obtained during spawning. Spring chinook obtained from coastal river locations (Trask and Rock Creek hatcheries) were not infected with this parasite. Infected spring chinook were found in all Willamette River tributaries surveyed. The incidence was greatest (28 percent at Dexter Dam) in fish which had migrated the farthest distance up the river. Ceratomyxa shasta in dead fish obtained from the Dexter Dam holding pond was over twice that found in spawned fish from this location. The incidence and distribution of Ceratomyxa shasta in fall chinook salmon was different from that found in coho or spring chinook. The coastal sample obtained from the Trask Hatchery contained one infected individual. The Klaskanine River was the only tributary on the lower Columbia that contained infected fall chinook, eight percent of these fish were infected. The infection was much greater in fall chinook sampled at the Oxbow Hatchery (Snake River) than in fish obtained from sites on the lower Columbia River. Sixty-five percent (65%) of the fish from this hatchery were infected. The incidence of Ceratomyxa shasta in prespawning mortalities at the Oxbow Hatchery (Snake River) was identical to that found in adults killed at spawning. Samples of steelhead trout obtained from the Big Creek Hatchery and Pelton Dam contained fish infected with this disease. The number of spores per smear of infected steelhead tissue was low when compared to the number observed in smears from coho and spring chinook. No steelhead mortalities were obtained. The incidence of Ceratomyxa shasta in adult salmonids does not appear to be related to the sex of the animals. The disease incidence appears to be related to the distance and rate of migration. Infections in adult salmonids caused by Ceratomyxa shasta probably occur during the freshwater phase of their life cycle. Geographically, Ceratomyxa shasta is widely distributed throughout the survey area. The parasite was found in all areas of the Columbia River basin sampled. Coastal river systems found to contain infected fish were the Nehalem and possibly the Trask. The incidence of Ceratomyxa shasta in coastal rivers decreased progressively from the Columbia River southward.
Book Synopsis Occurrence of the Protozoan Fish Parasite Ceratomyxa Shasta in the Deschutes River Basin and the Ultrastructure of the Spore by : Rowan Wayne Gould
Download or read book Occurrence of the Protozoan Fish Parasite Ceratomyxa Shasta in the Deschutes River Basin and the Ultrastructure of the Spore written by Rowan Wayne Gould and published by . This book was released on 1970 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this paper was twofold, (1) to determine the distribution of the infective stage of Ceratomyxa shasta (Noble) in the Deschutes River basin, and (2) to study the ultrastructure of the spore stage of the protozoan parasite. Liveboxes containing juvenile rainbow trout were placed at specific test points in the Deschutes River system. After an exposure period, the fish were examined for the presence of the parasite. C. shasta was detected in this manner in each of the three main tributaries to the Deschutes River. In the Metolius River the source of infection was Suttle Lake. In the upper Deschutes River the source was Crescent Lake. Crooked River was thought to contain the infective stage of C. shasta in the lower reaches because of contamination with Deschutes River water entering by irrigation canals. Odell and Davis Lakes (not directly connected to the Deschutes River) contain the infective stage, but are thought to constitute a closed system. The ultrastructure of the spore of C. shasta was examined by electron microscopy. Penetration of embedding plastic into the spore was possible only when the specimens were placed in 10% formalin for an extended period of time. The valves of the spore form knobs at the suture line similar to those of other myxosporidians. A septate desmosome similar to that described in Hydra (Wood, 1959) was identified between the two valves. Within the sporoplasm are two vesicular nuclei with nucleoli, endoplasmic reticulum, electron dense circular bodies, mitochondria and ribosome. packets. The polar capsule and filament of C. shasta are morphologically similar to those of other myxosporidians.
Book Synopsis Influence of "Aging" on the Maturation, Examined by Scanning Electron Microscopy, and Transmission of Ceratomyxa Shasta (Myxosporea), a Protozoan Parasite of Salmonid Fishes by : James Leonard Fendrick
Download or read book Influence of "Aging" on the Maturation, Examined by Scanning Electron Microscopy, and Transmission of Ceratomyxa Shasta (Myxosporea), a Protozoan Parasite of Salmonid Fishes written by James Leonard Fendrick and published by . This book was released on 1980 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theses and Dissertations, 1966-1970, Oregon State University by : Margaret Basilia Guss
Download or read book Theses and Dissertations, 1966-1970, Oregon State University written by Margaret Basilia Guss and published by . This book was released on 1973 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Disease Leaflet written by and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fish Parasites by : Patrick T. K. Woo
Download or read book Fish Parasites written by Patrick T. K. Woo and published by CABI. This book was released on 2012 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on pathobiology and protective strategies against protozoan and metazoan parasites of fish, this book reviews the latest research on important parasites: those that cause financial hardships to the aquaculture industry, have been introduced to new geographical regions through transportation of infected fish, are pathogenic to groups of finfish and detrimental to production, are highly adaptable and not host-specific with worldwide distributions, and that may serve as disease models for studies on other pathogens. It also highlights gaps in the knowledge to help direct future research.
Book Synopsis Northwest Fish Culture Conference by :
Download or read book Northwest Fish Culture Conference written by and published by . This book was released on with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Symposium on Diseases of Fishes and Shellfishes by : Stanislas F. Snieszko
Download or read book A Symposium on Diseases of Fishes and Shellfishes written by Stanislas F. Snieszko and published by . This book was released on 1970 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Occurrence of Ceratomyxa Shasta, a Myxosporidian Parasite of Salmonid Fish, at the Rapid River Salmon Hatchery, Idaho by : Travis Carl Coley
Download or read book The Occurrence of Ceratomyxa Shasta, a Myxosporidian Parasite of Salmonid Fish, at the Rapid River Salmon Hatchery, Idaho written by Travis Carl Coley and published by . This book was released on 1979 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Catalog of Research in Aquatic Pest Control and Pesticide Residues in Aquatic Environments by : Smithsonian Science Information Exchange
Download or read book A Catalog of Research in Aquatic Pest Control and Pesticide Residues in Aquatic Environments written by Smithsonian Science Information Exchange and published by . This book was released on 1972 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Diagnosis of Salmonid Diseases by : Carey O. Cunningham
Download or read book Molecular Diagnosis of Salmonid Diseases written by Carey O. Cunningham and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews: Methods and Technology in Fish Biology and Fisheries published by Kluwer Academic Publishers is a book series dedicated to the publication of information on advanced, forward-looking methodologies, technologies, or perspectives in fish and fisheries. This series is especially dedicated to relevant topics addressing global, international concern in fish and fisheries. Humans continue to challenge our environments with new technologies and technological applications. The dynamic creativity of our own species often tends to place the greatest burden on our supporting ecosystems. This is especially true for aquatic networks of creeks, lakes, rivers and ocean environments. We also frequently use our conceptual powers to balance conflicting requirements and demands on nature and continue to develop new approaches and tools to provide sustainable resources as well as conserve what we hold most dear on local and global scales. This book series will provide a window into the developing dynamic among humans, aquatic ecosystems (both freshwater and marine), and the organisms that inhabit aquatic environments. There are many reasons to doubt the increasing social and economic value technology has gained over the last two centuries. Science and technology represent stages in human development. I agree with Ernst Mayer when he said in Toward a New Philosophy of Biology (1988) that "endeavors to solve all scientific problems by pure logic and refined measurements are unproductive, if not totally irrelevant.
Book Synopsis Host Susceptibility, Histopathologic, and Transmission Studies on Ceratomyxa Shasta, a Myxosporidan Parasite of Salmonid Fish by : Keith Alan Johnson
Download or read book Host Susceptibility, Histopathologic, and Transmission Studies on Ceratomyxa Shasta, a Myxosporidan Parasite of Salmonid Fish written by Keith Alan Johnson and published by . This book was released on 1975 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Myxozoan Evolution, Ecology and Development by : Beth Okamura
Download or read book Myxozoan Evolution, Ecology and Development written by Beth Okamura and published by Springer. This book was released on 2015-04-01 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date review of the biology of myxozoans, which represent a divergent clade of endoparasitic cnidarians. Myxozoans are of fundamental interest in understanding how early diverging metazoans have adopted parasitic lifestyles, and are also of considerable economic and ecological concern as endoparasites of fish. Synthesizing recent research, the chapters explore issues such as myxozoan origins; evolutionary trends and diversification; development and life cycles; interactions with hosts; immunology; disease ecology; the impacts of climate change on disease; risk assessment; emerging diseases; and disease mitigation. This comprehensive work will appeal to a wide readership, from invertebrate zoologists, evolutionary biologists and developmental biologists to ecologists and parasitologists. It will also be of great practical interest to fisheries and conservation biologists. The identification of key areas for future research will appeal to scientists at all levels.
Book Synopsis Canadian Journal of Fisheries and Aquatic Sciences by :
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1992 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parasitic Protozoa written by and published by Elsevier. This book was released on 2012-12-02 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Updated and much expanded, the Second Edition of Parasitic Protozoa is designed to be useful to physicians, veterinarians, and research scientists concerned with diseases caused by protozoa in man, and in domestic and wild animals including fish, mollusks and insects, as well as the more commonly considered vertebrate animals. Each section contains information on disease pathogens, treatment, diagnosis, and epidemiology of the diseases caused by the various protozoans. The book is not limited to these medically-oriented subjects, but treats taxonomy, morphology, and metabolism of the organisms in such a way as to be of interest to scientists and graduate students working in the field of protozoology. The entire edition, published in ten volumes, is arranged so that subjects of common interest occupy individual volumes.
Download or read book Diseases of Aquatic Organisms written by and published by . This book was released on 1991 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1988 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
