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Distribution Of Ceratomyxa Shasta Myxozoa And Habitat Preference Of The Polychaete Host Manayunkia Speciosa In The Klamath River
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Book Synopsis Distribution of Ceratomyxa Shasta (Myxozoa) and Habitat Preference of the Polychaete Host, Manayunkia Speciosa in the Klamath River by : Richard W. Stocking
Download or read book Distribution of Ceratomyxa Shasta (Myxozoa) and Habitat Preference of the Polychaete Host, Manayunkia Speciosa in the Klamath River written by Richard W. Stocking and published by . This book was released on 2006 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceratomyxa shasta is a myxozoan parasite of salmonids and requires the freshwater polychaete, Manayunkia speciosa to complete its life cycle. The parasite?s distribution is currently limited to the Pacific Northwest region of North America and has been reported to cause substantial losses of both wild and hatchery salmonids. The spatial and seasonal distribution of C. shasta can vary considerably both within and between river systems. This variation was thought to be a result of specific habitat requirements limiting polychaete distribution and abundance. Field studies were conducted in the Klamath River basin where C. shasta is suspected to have caused high losses in migrating juvenile salmonids. The purpose of this study was to document the host-parasite distribution of C. shasta in the river, assess its ability to cause disease, and study aspects of the polychaetes habitat ecology. This is the first study to report the broad-scale distribution of M. speciosa in a river and the various characteristics of those populations. The seasonal distribution of C. shasta in the Klamath River was investigated by exposing separate groups of C. shasta-susceptible rainbow trout (Oncorhynchus mykiss) at monthly intervals during the study. The spatial distribution was assessed by one basin-wide exposure. The ability of C. shasta to cause disease in native Klamath River salmonids was investigated by exposing fall Chinook salmon (Oncorhynchus tshawytscha; Iron Gate Hatchery strain), along with the known susceptible strains of rainbow trout. The distribution and habitat preferences of M. speciosa were investigated by collecting benthic habitat samples from a variety of habitat types. Where populations were identified, sampling was conducted at a finer scale to study aspects of those populations such as size, density, and age-structure. The distribution and prevalence of C. shasta infection in populations of M. speciosa were determined by using a pooled prevalence strategy on several polychaete populations throughout the Klamath River. Ceratomyxa shasta, with few exceptions, was only detected in exposure groups from the main-stem Klamath. The parasite could be detected from April until November when water temperatures reached 6ʻC. It is likely the parasite could be detected beyond the temporal limits of this study. Prevalence of infection was high with little mortality in rainbow trout exposures groups above Iron Gate dam (Upper Klamath River). Mortality was 100% for rainbow trout exposure groups below Iron Gate Dam (Lower Klamath River). Fall Chinook salmon demonstrated a high level of resistance to the parasite above Iron Gate Dam compared to the rainbow trout, but suffered nearly 50% mortality below the dam. This suggests that resistance of native stocks to the parasite can be overwhelmed in the Lower Klamath River and provides further evidence that infectious dose is high relative to the Upper Klamath River. The polychaete host, M. speciosa, was found to occur throughout the Klamath River and was often located in slow flowing depositional habitats such as pools and reservoirs. River populations were highly aggregated into small areas whereas reservoir populations were large, widespread and centered at the inflow area. Sand-organic matter substrates and mat-forming epilithic algae were primary microhabitats. Flow velocity, habitat stability and life traits such as dispersal ability appear to be primary factors limiting distribution and abundance of the polychaete. Populations of M. speciosa tested for the prevalence of C. shasta infection demonstrate a low mean prevalence of 0.27% with areas of elevated infection (4.8 and 8.3%) located just downstream of Iron Gate Dam. This suggests that this area may be the primary source of infectious actinospores contributing to the high juvenile salmonid mortality observed in the Lower Klamath River.
Book Synopsis Klamath Hydroelectric Project, FERC Project No. 2080-027, Oregon and California by :
Download or read book Klamath Hydroelectric Project, FERC Project No. 2080-027, Oregon and California written by and published by . This book was released on 2007 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Final Environmental Impact Statement for Hydropower License by :
Download or read book Final Environmental Impact Statement for Hydropower License written by and published by . This book was released on 2007 with total page 886 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 Salmonid Whirling Disease by : Ken Wolf
Download or read book Salmonid Whirling Disease written by Ken Wolf and published by . This book was released on 1985 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Colour Atlas of Salmonid Diseases by : David W. Bruno
Download or read book A Colour Atlas of Salmonid Diseases written by David W. Bruno and published by Springer Science & Business Media. This book was released on 2013-09-09 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salmonids have widespread economic and environmental importance. Correct identification and understanding of their diseases are therefore vital if valuable stocks are to be maintained. This volume provides a practical guide and an aid to disease recognition. This is an updated and extended version of the first publication in 1996 and contains around 400 high quality colour photomicrographs.
Book Synopsis Salmonid Whirling Disease by : Maria E. Markiw
Download or read book Salmonid Whirling Disease written by Maria E. Markiw and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Systematics and Diversity of Annelids by : Maria Capa
Download or read book Systematics and Diversity of Annelids written by Maria Capa and published by MDPI. This book was released on 2021-08-18 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this Special Issue, we address the state of the art of the systematics of the main annelid groups and the improvements in the diversity they hold, with special emphasis on the latest discoveries in well-studied areas, expeditions to unsurveyed areas or environments, or the use of novel techniques that allow for the improvement of biodiversity knowledge. We are hoping that this Special Issue will provide a platform facilitating a review of current knowledge on the subject, identifying current research problems, as well as indicating directions and research trends for the future.
Book Synopsis Diseases of Fish and Shellfish by : European Association of Fish Pathologists
Download or read book Diseases of Fish and Shellfish written by European Association of Fish Pathologists and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Parasitic and Infectious Diseases by : Marilyn E. Scott
Download or read book Parasitic and Infectious Diseases written by Marilyn E. Scott and published by . This book was released on 1994 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are at least two populations involved in any infectious disease process: the population of parasites that cause the disease and the population of hosts that are infected. Parasitic and Infectious Diseases: Epidemiology and Ecology focuses on the interface between these two populations. The various chapters demonstrate how combined field, experimental, and theoretical studies aid in our understanding of the dynamics of infectious disease processes and in formulating control strategies. Moving from the basics of mathematical modeling and epidemiological principles to case studies of human, livestock, and wild animal infections, the editors have assembled a book of tremendous value to researchers in ecology, parasitology, medical and veterinary sciences, infectious disease, epidemiology, and other related fields of study. Key Features * Introduction of mathematical modeling for the novice * Case studies covering a spectrum of infections in humans, livestock, and wild animals * Integration of field, laboratory, and theoretical approaches * Development and illustration of key concepts in interactions between infectious agents and their host populations * Written and edited by internationally recognized leaders in the field
Download or read book Pacific Salmon Management written by and published by . This book was released on 1991 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Klamath Project by : Eric A. Stene
Download or read book The Klamath Project written by Eric A. Stene and published by . This book was released on 1994 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fish Diseases by : Wilhelm Schäperclaus
Download or read book Fish Diseases written by Wilhelm Schäperclaus and published by . This book was released on 1991 with total page 1398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Oligochaeta written by G. Bonomi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the First International Symposium on Aquatic Oligochaete Biology in Sidney, B. C. , the suggestion was made to hold the second in Pallanza, on Lake Maggiore, at the C. N. R. -Istituto Italiano di Idrobiologia. At the same time it was decided that there should be a symposium every third year. The organization of the symposium was made considerably easier by the Senior Editor's having been in personal contact with several Russian colleagues (courtesy of a kind invitation from the U. S. S. R. Academy of Sciences), the 'Hamburg Group' and the Junior Editor. Correspondence with various students of Oligochaeta also furnished many useful suggestions. The Second International Symposium on Aquatic Oligochaete Biology was therefore held in Pallanza in late September 1982 and was attended by 53 scientists from 16 countries in Europe, North America, Asia and Australia. No review papers were formally invited as this had already been done at the first symposium: all the papers were accordingly allotted the same time for oral presentation. These proceedings contain all papers Hrabe and Slepukhina, which were given in absentia, as it presented at the symposium, including those by was impossible for the authors to join the group. The main topics were taxonomy and evolution of Oligo chaeta, life-cyle and population studies, the role of Oligo chaeta in assessing water pollution, physiolog ical studies, community and distribution studies. Special taxonomic workshops took place in the evenings.
Book Synopsis Aquatic Oligochaete Biology by : Ralph O. Brinkhurst
Download or read book Aquatic Oligochaete Biology written by Ralph O. Brinkhurst and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: After some conversations with Professor Dr. H. Caspers and other participants at the triennial congress of the International Association of Theoretical and Applied Limnology (S. I. L. ) held in Copenhagen, Denmark (1977), the senior editor approached the international delegates at the business meeting for approval of the concept of holding the First International Symposium on Aquatic Oligochaete Biology at Sidney (near Victoria) British Columbia on May 1-4, 1979. The S. I. L. agreed to sponsor such a meeting, and this sponsorship in turn led to the provision of space and technical facilities at the Institute of Ocean Sciences Patricia Bay, the Pacific Regional headquarters of the Ocean and Aquatic Sciences component of the federal Fisheri~s and Oceans Department. The National Research Council of Canada provided travel support for a number of non-Canadian participants. Invitations were sent to as many active workers in the field as the senior editor could name, and in addition two representatives of closely allied fields were invited - Dr. V. Standen who works with closely related but terrestrial species, and Dr. J. Grassle who works with polychaetes but especially with Capitella capitata which is much like an oligochaete in some aspects of its biolog- so much so that the senior editor in his salad days succumbed to some ill-founded advice and described Capitella as a new marine tubificid! The addition of these "outside" influences prevented the group from making a number of unfounded assumptions during discussions, and provided valuable cross-linkages.
Book Synopsis Tropical and Sub-Tropical Reservoir Limnology in China by : Bo-Ping Han
Download or read book Tropical and Sub-Tropical Reservoir Limnology in China written by Bo-Ping Han and published by Springer Science & Business Media. This book was released on 2011-09-18 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reservoirs are specific aquatic ecosystems and have complex behaviors of both natural lakes and rivers, regulated significantly by their functions such as flood controlling, hydropower generation, irrigation and fishery. This volume offers a general description of reservoir limnology in tropical and subtropical China. It functions as a window opening to all the aquatic scientists with a main focus on reservoirs in southern China and at the same time also covering several important, large reservoirs such as the Three Gorge Reservoir and Danjiangko Reservoir. Topics discussed are zooplankton, phytoplankton and zoobenthos communities, cyanobateria, nutrient budget, sediments, biogeochemical cycling of mercury, fishery and eutrophication.
Book Synopsis Advances in Earthworm Taxonomy V by : Tomáš Pavlíček
Download or read book Advances in Earthworm Taxonomy V written by Tomáš Pavlíček and published by . This book was released on 2012 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
