Cool Pathogen Free Refuge Lowers Pathogen Associated Prespawn Mortality Of Willamette River Chinook Salmon Oncorhynchus Tshawytscha

Download Cool Pathogen Free Refuge Lowers Pathogen Associated Prespawn Mortality Of Willamette River Chinook Salmon Oncorhynchus Tshawytscha full books in PDF, epub, and Kindle. Read online Cool Pathogen Free Refuge Lowers Pathogen Associated Prespawn Mortality Of Willamette River Chinook Salmon Oncorhynchus Tshawytscha ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Cool, Pathogen Free Refuge Lowers Pathogen Associated Prespawn Mortality of Willamette River Chinook Salmon (Oncorhynchus Tshawytscha)

Author : Susan Eileen Benda
Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (883 download)

DOWNLOAD NOW!

Book Synopsis Cool, Pathogen Free Refuge Lowers Pathogen Associated Prespawn Mortality of Willamette River Chinook Salmon (Oncorhynchus Tshawytscha) by : Susan Eileen Benda

Download or read book Cool, Pathogen Free Refuge Lowers Pathogen Associated Prespawn Mortality of Willamette River Chinook Salmon (Oncorhynchus Tshawytscha) written by Susan Eileen Benda and published by . This book was released on 2014 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spring Chinook salmon, Oncorhynchus tshawytscha, are transported above dams in the Willamette River to provide access to blocked spawning habitat. However, 30-95% of these transplants may die before spawning in some years. To varying degrees, salmon in other tributaries--both blocked and unblocked--have similar prespawn mortality (PSM). Our study determined if holding in constant temperature, pathogen free conditions prior to spawning increased survival to spawn. In addition, we evaluated pathogens as a potential cause of PSM. Adult Chinook were captured early and late in the season from the lower Willamette River and from upper river tributaries and held in constant, cool temperature (13 °C), pathogen-free water at Oregon State University. Additional fish were sampled at time of transport from each of the collection sites. Finally, recent mortalities were collected from river surveys on holding and spawning reaches above traps. Necropsies were performed on all fish, and samples were processed for histology. Held fish were spawned to determine if progeny were viable. Held fish were less likely to be a PSM than fish that were outplanted to the river. However, bacterial infections were more prevalent in held fish than outplanted fish. Consistent with these observations, PSM in held fish was more likely to have higher burdens of pathogens than spawned fish. Held spawned fish were more likely to have Myxobolus sp. brain infections and less likely to be infected with the kidney myxozoan Parvicapusla minibicornis than spawned outplanted fish. The equal likelihood of other pathogens for held and outplanted spawned fish suggests interactive effects determine survival and that holding at 13 °C prevented expression of lethal pathogenesis. Progeny of held fish from all locations and collection dates were viable. Overall, holding could be a viable method to reduce PSM, but issues of transport stress, proliferative disease such as those caused by bacteria, and antibiotics remain.

Large-scale dam removal and ecosystem restoration

Author : Rebecca McCaffery
Publisher : Frontiers Media SA
ISBN 13 : 2832553605
Total Pages : 405 pages
Book Rating : 4.8/5 (325 download)

DOWNLOAD NOW!

Book Synopsis Large-scale dam removal and ecosystem restoration by : Rebecca McCaffery

Download or read book Large-scale dam removal and ecosystem restoration written by Rebecca McCaffery and published by Frontiers Media SA. This book was released on 2024-09-20 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers are vital ecosystems that support aquatic and terrestrial biodiversity and several ecosystem services, including food, water, culture, and recreation. After centuries of building dams on rivers across the world, dam removal projects are now on the rise due to obsolescence, reservoir sedimentation, insufficient return on investment, or river restoration and conservation priorities. Most dam removal projects have focused on smaller structures (< 10 m in structural height), but larger structures have also started to be removed in increasing numbers as practitioners, river managers, conservationists, and the public have gained more experience with the practice. Recent estimates suggest that only a small fraction of dam removals have been scientifically studied, and include mostly small dams and short time scales. Documenting the long-term ecological outcomes of large dam removal (i.e. >10 m tall) represents a new frontier in dam removal research: projects are more recent and provide an opportunity to understand the complex ecological changes that occur with these transformative restoration projects. Here, we aim to collate a diverse array of papers on long-term dam removal research projects involving larger dams (>10 m) to synthesize the issues, outcomes, tools, and experimental designs used to study large dam removal projects from physical, biological, and ecological perspectives. With this collection, we aim to showcase diverse global projects on ecosystem responses to large dam removal; collect perspectives from different disciplines, fields, and geographies; and synthesize the current state of knowledge in this area. We expect that this Research Topic will be informative to ongoing, long-term ecological restoration and monitoring projects related to dam removal as well as to upcoming large dam removal projects. We welcome contributions from all disciplines addressing the physical, ecological, and ecosystem responses to large-scale dam removal. Contributions could include original research in a specific discipline or area, case studies, or synthesis papers that address one or more of these topics in a transdisciplinary approach. Contributors could address any of the following major topics as related to outcomes of large dam removal, alone or in combination: Freshwater, estuarine, and marine aquatic biota; River and reservoir geomorphology; Terrestrial and riparian vegetation; Wildlife; Sedimentation; and Modelling. We would like contributors to highlight key results in their area of study, cross-disciplinary insights, and lessons learned that could inform ongoing monitoring and research efforts in current projects as well as upcoming large dam removals.

Lower Willamette River Cold-water Refuge Narrative Criterion Interpretation Study

Author :
Publisher :
ISBN 13 :
Total Pages : 187 pages
Book Rating : 4.:/5 (12 download)

DOWNLOAD NOW!

Book Synopsis Lower Willamette River Cold-water Refuge Narrative Criterion Interpretation Study by :

Download or read book Lower Willamette River Cold-water Refuge Narrative Criterion Interpretation Study written by and published by . This book was released on 2020 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Lower Willamette River cold-water refuge study addresses a jeopardy decision of the 2015 National Marine Fisheries Service (NMFS) Endangered Species Act Biological Opinion on the Environmental Protection Agency's Proposed Approval of Certain Oregon Water Quality Standards Including Temperature and Intergravel Dissolved Oxygen. In the 2015 Biological Opinion, NMFS found jeopardy on the U.S. EPA’s approval of Oregon’s 2003 water temperature criterion for migration corridors. NMFS questioned the protectiveness of the 20°C criterion relative to the Salmon and Trout Rearing and Migration criterion of 18°C, because DEQ had not demonstrated how to interpret the CWR narrative provision. The CWR narrative provision supplements the numeric criterion of 20°C to protect migrating populations of salmon and steelhead, including threatened and endangered Upper Willamette and Lower Columbia River Chinook salmon (Oncorhynchus tshawytscha), and Upper Willamette and Lower Columbia River steelhead trout (Oncorhynchus mykiss) that pass through the designated migration corridor to reach their spawning streams. This study satisfies the reasonable and prudent alternative identified in the Biological Opinion as a means to interpret the cold-water refuge (CWR) narrative provision in Oregon’s temperature standard in order to allow for implementation of the criterion through DEQ’s Clean Water Act authorities. The Oregon DEQ agreed to develop a cold-water refuge study for the lower 50 miles of the Willamette River in order to interpret the narrative criterion and evaluate whether there is sufficient cold-water refuge (CWR) and identify what regulatory or voluntary actions could be taken, should DEQ find that the narrative is not being met."--From executive summary (page 15).

Pre-spawn Mortality of Upper Willamette River Spring Chinook Salmon

Author : Adrienne Grace Roumasset
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (832 download)

DOWNLOAD NOW!

Book Synopsis Pre-spawn Mortality of Upper Willamette River Spring Chinook Salmon by : Adrienne Grace Roumasset

Download or read book Pre-spawn Mortality of Upper Willamette River Spring Chinook Salmon written by Adrienne Grace Roumasset and published by . This book was released on 2012 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Assessing Disease Impacts of Hatcheries on Downstream Salmonids in the Willamette River Basin, Oregon

Author : Michelle Jakaitis
Publisher :
ISBN 13 :
Total Pages : 107 pages
Book Rating : 4.:/5 (897 download)

DOWNLOAD NOW!

Book Synopsis Assessing Disease Impacts of Hatcheries on Downstream Salmonids in the Willamette River Basin, Oregon by : Michelle Jakaitis

Download or read book Assessing Disease Impacts of Hatcheries on Downstream Salmonids in the Willamette River Basin, Oregon written by Michelle Jakaitis and published by . This book was released on 2014 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hatcheries are often perceived as a source of pathogen amplification, potentially increasing disease risk to free-ranging populations; at the same time, free-ranging fishes may introduce pathogens into hatcheries through untreated water sources. Many pathogens exist naturally within the environment (with the exception of introduced pathogens) and the presence of a pathogen does not guarantee infection or disease (Naish, Taylor III, Levin, Quinn, Winton, Huppert & Hilborn 2007). Infections can be acute, chronic, or asymptomatic, fish may die, recover, or become carriers (Naish et al. 2007), and pathogens may be shed from any of these stages (Scottish Executive 2002). Most salmon and trout hatcheries along the Willamette River Basin, Oregon, USA, utilize an untreated river water supply for their rearing ponds and release this water, untreated, back into the river. This creates a potential for waterborne pathogens present in free-ranging hosts to be transmitted through the water supply to hatchery populations. Moreover, any hatchery epizootic can amplify pathogens and release these into the water, which could have a direct impact on free-ranging populations exposed to those pathogens in hatchery effluent. The goal of this thesis was to assess transmission of the pathogens Flavobacterium columnare, F. psychrophilum, Aeromonas salmonicida, Renibacterium salmonicida, and Infectious Hematopoietic Necrosis Virus (IHNV), at selected hatcheries in the Willamette River Basin. To accomplish this, I considered historical data and hatchery-specific and pathogen-specific factors involved in transmission and disease. Additionally, I conducted sentinel fishes exposures (Oncorhynchus mykiss and O. tshawytscha) at hatcheries during both epizootics and non-epizootic periods. Naïve sentinel fish were placed in hatchery influents and effluents to determine transmission direction and pathogen prevalence associated with hatcheries. I found that sentinel fishes developed infections downstream of hatcheries that were undergoing specific bacterial epizootics, or had low levels of pathogen prevalence within the hatchery, but not at any other time. Infections and mortality were due to the same pathogens responsible for hatchery epizootics, indicating the hatchery as a potential source. This may be a limited effect dependent on distance, dilution, and pathogen. The presence of large numbers of returning, congregating adult fishes may also contribute pathogens to the river in hatchery areas. Sentinel fishes held in hatchery influents did not, at any point, become infected with target pathogens, even during hatchery epizootics. Although I was unable to identify the pathogen entry point leading to hatchery epizootics, I determined that pathogen transmission appeared to be dependent on the pathogen, species, and location where sentinel fish were held. This thesis identifies routes and risks of pathogen transmission at selected Oregon hatcheries, with applications to inform state-wide fish health management.

Climate Change and Indigenous Peoples in the United States

Author : Julie Koppel Maldonado
Publisher : Springer
ISBN 13 : 3319052667
Total Pages : 178 pages
Book Rating : 4.3/5 (19 download)

DOWNLOAD NOW!

Book Synopsis Climate Change and Indigenous Peoples in the United States by : Julie Koppel Maldonado

Download or read book Climate Change and Indigenous Peoples in the United States written by Julie Koppel Maldonado and published by Springer. This book was released on 2014-04-05 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a long history and deep connection to the Earth’s resources, indigenous peoples have an intimate understanding and ability to observe the impacts linked to climate change. Traditional ecological knowledge and tribal experience play a key role in developing future scientific solutions for adaptation to the impacts. The book explores climate-related issues for indigenous communities in the United States, including loss of traditional knowledge, forests and ecosystems, food security and traditional foods, as well as water, Arctic sea ice loss, permafrost thaw and relocation. The book also highlights how tribal communities and programs are responding to the changing environments. Fifty authors from tribal communities, academia, government agencies and NGOs contributed to the book. Previously published in Climatic Change, Volume 120, Issue 3, 2013.

Mortality Threshold for Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) in an Epidemiological Model of Ceratomyxa Shasta

Author : R. Adam Ray
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (565 download)

DOWNLOAD NOW!

Book Synopsis Mortality Threshold for Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) in an Epidemiological Model of Ceratomyxa Shasta by : R. Adam Ray

Download or read book Mortality Threshold for Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) in an Epidemiological Model of Ceratomyxa Shasta written by R. Adam Ray and published by . This book was released on 2010 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The myxozoan parasite, Ceratomyxa shasta, is the most significant pathogen of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Klamath River, CA, USA. This parasite requires two hosts - a freshwater polychaete (Manayunkia speciosa) and a salmonid - to complete its life cycle. The complex life cycle and large geographic area where infection occurs make monitoring and managing the disease, ceratomyxosis, difficult. Epidemiological models are helpful tools to examine complex disease systems as they serve to identify parameters and rank their relative importance. A system of equations is used to derive the basic reproductive number (R0) of the parasite. In this paper we present a model for ceratomyxosis induced mortality in Chinook salmon. The field experiments described herein quantify the mortality threshold (a critical parameter in the model), by exposing native Chinook salmon to C. shasta in the Klamath River. The average percent mortality that resulted from this challenge ranged from 2.5% to 98.5% over an exposure dose of 4.4 - 612 x 106 parasites. This study identified a non-linear mortality threshold for Iron Gate Hatchery (IGH) Chinook salmon that ranged from 5.6 - 9.9 x 104 total parasites. Below this threshold no mortality occurs, yet above it mortality dramatically increases. This threshold provides a target to reduce parasitism in emigrating juvenile Chinook salmon.

Migratory Behavior of Adult Spring Chinook Salmon in the Willamette River and Its Tributaries

Author :
Publisher :
ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (683 download)

DOWNLOAD NOW!

Book Synopsis Migratory Behavior of Adult Spring Chinook Salmon in the Willamette River and Its Tributaries by :

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 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Migration patterns of adult spring chinook salmon above Willamette Falls differed depending on when the fish passed the Falls, with considerable among-fish variability. Early-run fish often terminated their migration for extended periods of time, in association with increased flows and decreased temperatures. Mid-run fish tended to migrate steadily upstream at a rate of 30-40 km/day. Late-run fish frequently ceased migrating or fell back downstream after migrating 10-200 km up the Willamette River or its tributaries; this appeared to be associated with warming water during summer and resulted in considerable mortality. Up to 40% of the adult salmon entering the Willamette River System above Willamette Falls (i.e. counted at the ladder) may die before reaching upriver spawning areas. Up to 10% of the fish passing up over Willamette Falls may fall-back below the Falls; some migrate to the Columbia River or lower Willamette River tributaries. If rearing conditions at hatcheries affect timing of adult returns because of different juvenile development rates and improper timing of smolt releases, then differential mortality in the freshwater segment of the adult migrations may confound interpretation of studies evaluating rearing practices.

Pacific Salmon

Author :
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.3/5 (121 download)

DOWNLOAD NOW!

Book Synopsis Pacific Salmon by :

Download or read book Pacific Salmon written by and published by . This book was released on 1995 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Physiological Ecology of Pacific Salmon

Author : Cornelis Groot
Publisher : UBC Press
ISBN 13 : 9780774859868
Total Pages : 534 pages
Book Rating : 4.8/5 (598 download)

DOWNLOAD NOW!

Book Synopsis Physiological Ecology of Pacific Salmon by : Cornelis Groot

Download or read book Physiological Ecology of Pacific Salmon written by Cornelis Groot and published by UBC Press. This book was released on 2010-10-01 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every year, countless juvenile Pacific salmon leave streams and rivers on their migration to feeding grounds in the North Pacific Ocean and the Bering Sea. After periods ranging from a few months to several years, adult salmon enter rivers along the coasts of Asia and North America to spawn and complete their life cycle. Within this general outline, various life history patterns, both among and within species, involve diverse ways of exploiting freshwater, estuarine, and marine habitats. There are seven species of Pacific salmon. Five (coho, chinook chum, pink, and sockeye) occur in both North America and Asia. Their complex life histories and spectacular migrations have long fascinated biologists and amateurs alike. Physiological Ecology of Pacific Salmon provides comprehensive reviews by leading researchers of the physiological adaptations that allow Pacific Salmon to sustain themselves in the diverse environments in which they live. It begins with an analysis of energy expenditure and continues with reviews of locomotion, growth, feeding, and nutrition. Subsequent chapters deal with osmotic adjustments enabling the passage between fresh and salt water, nitrogen excretion and regulation of acid-base balance, circulation and gas transfer, and finally, responses to stress. This thorough and authoritative volume will be a valuable reference for students and researchers of biology and fisheries science as they seek to understand the environmental requirements for the perpetuation of these unique and valuable species.

Biological Opinion [that Address the Potential Effects on Sacramento River Winter-run Chinook Salmon from the Bureau of Reclamation's Proposed Los Vaqueros Project]

Download Biological Opinion [that Address the Potential Effects on Sacramento River Winter-run Chinook Salmon from the Bureau of Reclamation's Proposed Los Vaqueros Project] PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (121 download)

DOWNLOAD NOW!

Book Synopsis Biological Opinion [that Address the Potential Effects on Sacramento River Winter-run Chinook Salmon from the Bureau of Reclamation's Proposed Los Vaqueros Project] by :

Download or read book Biological Opinion [that Address the Potential Effects on Sacramento River Winter-run Chinook Salmon from the Bureau of Reclamation's Proposed Los Vaqueros Project] written by and published by . This book was released on 1993 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Molecular Approaches to the Study of the Ocean

Author : K.E. Cooksey
Publisher : Springer Science & Business Media
ISBN 13 : 9401149283
Total Pages : 562 pages
Book Rating : 4.4/5 (11 download)

DOWNLOAD NOW!

Book Synopsis Molecular Approaches to the Study of the Ocean by : K.E. Cooksey

Download or read book Molecular Approaches to the Study of the Ocean written by K.E. Cooksey and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine biological science is now studied at the molecular level and although research scientists depend on information gained using molecular techniques, there is no book explaining the philosophy of this approach. Molecular Approaches to the Study of the Ocean introduces the reasons why molecular technology is such a powerful tool in the study of the oceans, describing the types of techniques that can be used, why they are useful and gives examples of their application. Molecular biological techniques allow phylogenetic relationships to be explored in a manner that no macroscopic method can; although the book deals with organisms near the base of the marine food web, the ideas can be used in studies of macroorganisms as well as those in freshwater environments.

Ambient Water Quality Criteria for Cadmium

Author : United States Environmental Protection Agency (EPA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781726089128
Total Pages : 190 pages
Book Rating : 4.0/5 (891 download)

DOWNLOAD NOW!

Book Synopsis Ambient Water Quality Criteria for Cadmium by : United States Environmental Protection Agency (EPA)

Download or read book Ambient Water Quality Criteria for Cadmium written by United States Environmental Protection Agency (EPA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-24 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ambient Water Quality Criteria for Cadmium

The Behavior and Ecology of Pacific Salmon and Trout

Author : Thomas P. Quinn
Publisher : UBC Press
ISBN 13 : 0774842431
Total Pages : 392 pages
Book Rating : 4.7/5 (748 download)

DOWNLOAD NOW!

Book Synopsis The Behavior and Ecology of Pacific Salmon and Trout by : Thomas P. Quinn

Download or read book The Behavior and Ecology of Pacific Salmon and Trout written by Thomas P. Quinn and published by UBC Press. This book was released on 2011-11-01 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Behavior and Ecology of Pacific Salmon and Trout explains the patterns of mate choice, the competition for nest sites, and the fate of the salmon after their death. It describes the lives of offspring during the months they spend incubating in gravel, growing in fresh water, and migrating out to sea to mature. This thorough, up-to-date survey should be on the shelf of everyone with a professional or personal interest in Pacific salmon and trout. Written in a technically accurate but engaging style, it will appeal to a wide range of readers, including students, anglers, biologists, conservationists, legislators, and armchair naturalists.

A Symposium on Diseases of Fishes and Shellfishes

Author : Stanislas F. Snieszko
Publisher :
ISBN 13 :
Total Pages : 544 pages
Book Rating : 4.:/5 (318 download)

DOWNLOAD NOW!

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:

San Joaquin River Restoration Program

Author : United States. Bureau of Reclamation
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.3/5 (121 download)

DOWNLOAD NOW!

Book Synopsis San Joaquin River Restoration Program by : United States. Bureau of Reclamation

Download or read book San Joaquin River Restoration Program written by United States. Bureau of Reclamation and published by . This book was released on 2011 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Lampreys: Biology, Conservation and Control

Author : Margaret F. Docker
Publisher : Springer
ISBN 13 : 9401793069
Total Pages : 451 pages
Book Rating : 4.4/5 (17 download)

DOWNLOAD NOW!

Book Synopsis Lampreys: Biology, Conservation and Control by : Margaret F. Docker

Download or read book Lampreys: Biology, Conservation and Control written by Margaret F. Docker and published by Springer. This book was released on 2014-11-24 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides the most comprehensive review of lamprey biology since Hardisty and Potter’s five-volume “The Biology of Lampreys” published more than 30 years ago. Published in two volumes, it includes contributions from international lamprey experts, reviewing and providing new insights into the evolution, general biology, and management of lampreys worldwide. This first volume offers up-to-date chapters on the systematics, general biology, conservation status, and conservation needs of lampreys. It will serve as an important reference for researchers working on any aspect of lamprey biology and fishery managers whose mandate is to control or conserve lamprey populations.