Download or read book Investigations Into the Feeding Habits of Piscivorous Fishes in Coeur D Alene Lake Idaho written by Jennifer L. Scott and published by . This book was released on 2002 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Coeur d'Alene Tribe of lndians have proposed a westslope cutthroat trout, Oncorhynchus clarki lewisi, production facility to enhance adfluvial populations within the Coeur d'Alene Lake System. Westslope cutthroat trout are a species of special concern in Idaho. One of the limiting factors to be examined prior to implementing the trout hatchery was the potential for predatory fish to eat cutthroat trout after they migrated into Coeur d'Alene Lake. The annual feeding habits of the five major piscivorous fishes were examined from Coeur d'Alene Lake, the lateral lakes of the Coeur d'Alene River and lower sections ofthe St. Joe River, Idaho to determine the importance of the westslope cutthroat trout in their diets. Fish were collected by boat electrofishing, horizontal gillnets, vertical gillnets, and angling. Stomach contents were extracted from the stomach and preserved in 10% formalin. Fish remains in predator diets were keyed using diagnostic bones. Diagnostic bone length to total body length regressions were used to back calculate the original size of the prey fish. Of 493 stomachs examined, nine westslope cutthroat trout could be positively identified in the stomach contents. Six were in northern pike (Esox lucius) stomachs, two were from chinook salmon (O. tshawytscha), and one from a smallmouth bass (Micropterus dolomieui). Cutthroat trout were not found in any northern pikeminnow (Ptychocheilus oregonensis) or largemouth bass (M. salmoides) stomach samples. The average size of cutthroat trout consumed by these piscivores was 215 mm in total length, which correlates with the average size of a four year old in this system. The cutthroat trout consumed by predators in this study were likely first year spawners or making their first adfluvial migration into the lake from natal tributaries. In many chinook salmon and northern pikeminnow stomachs, salmonids were present, but could not be keyed to species due to extensive digestion and/or lack of diagnostic bones. Northern pike seemed to pose the biggest threat to migrating cutthroat trout. Northern pike are typically found in shallow water, as were cutthroat trout in this study. Westslope cutthroat trout were identified in 23% of northern pike stomachs analyzed (n=26). Chinook salmon and northern pikeminnow typically consume fish in pelagic waters; cutthroat trout were positively identified in 5% of chinook stomachs (n=43) examined and none were found in northern pikeminnow stomachs (n=227)"--Document.
Download or read book Spokane River and Post Falls Hydroelectric Projects States of Washington and Idaho written by and published by . This book was released on 2007 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics Food Habits Movement and Habitat Use of Northern Pike in the Coeur D Alene Lake System Idaho written by Bruce A. Rich and published by . This book was released on 1992 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the American Fisheries Society written by American Fisheries Society and published by . This book was released on 1959 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interactions Between Endangered Fishes and Introduced Gamefishes in the Yampa River Colorado 1987 1991 written by Thomas P. Nesler and published by . This book was released on 1995 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acid Mine Drainage Rock Drainage and Acid Sulfate Soils written by James A. Jacobs and published by John Wiley & Sons. This book was released on 2014-04-28 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the tools needed to analyze and solve acid drainage problems Featuring contributions from leading experts in science and engineering, this book explores the complex biogeochemistry of acid mine drainage, rock drainage, and acid sulfate soils. It describes how to predict, prevent, and remediate the environmental impact of acid drainage and the oxidation of sulfides, offering the latest sampling and analytical methods. Moreover, readers will discover new approaches for recovering valuable resources from acid mine drainage, including bioleaching. Acid Mine Drainage, Rock Drainage, and Acid Sulfate Soils reviews the most current findings in the field, offering new insights into the underlying causes as well as new tools to minimize the harm of acid drainage: Part I: Causes of Acid Mine Drainage, Rock Drainage and Sulfate Soils focuses on the biogeochemistry of acid drainage in different environments. Part II: Assessment of Acid Mine Drainage, Rock Drainage and Sulfate Soils covers stream characterization, aquatic and biological sampling, evaluation of aquatic resources, and some unusual aspects of sulfide oxidation. Part III: Prediction and Prevention of Acid Drainage discusses acid-base accounting, kinetic testing, block modeling, petrology, and mineralogy studies. It also explains relevant policy and regulations. Part IV: Remediation of Acid Drainage, Rock Drainage and Sulfate Soils examines both passive and active cleanup methods to remediate acid drainage. Case studies from a variety of geologic settings highlight various approaches to analyzing and solving acid drainage problems. Replete with helpful appendices and an extensive list of web resources, Acid Mine Drainage, Rock Drainage, and Acid Sulfate Soils is recommended for mining engineers and scientists, regulatory officials, environmental scientists, land developers, and students.
Download or read book Applied Ecology Abstracts written by and published by . This book was released on 1978 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Restoration of Aquatic Ecosystems written by National Research Council and published by National Academies Press. This book was released on 1992-01-01 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
Download or read book Freshwater Fishes of North America written by Melvin L. Warren, Jr. and published by Johns Hopkins University Press. This book was released on 2020-07-14 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt: H. Wilson
Download or read book Bioavailability of Contaminants in Soils and Sediments written by National Research Council and published by National Academies Press. This book was released on 2003-05-03 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.
Download or read book Sport Fish Restoration written by United States. Bureau of Sport Fisheries and Wildlife and published by . This book was released on 1957 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Native Trout of Western North America written by Robert J. Behnke and published by . This book was released on 1992 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury in Fish Bed Sediment and Water from Streams Across the United States 1998 2005 written by Barbara C. Scudder and published by DIANE Publishing. This book was released on 2010-08 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on how mercury (Hg) was examined in top-predator fish, bed sediment, and water from streams that spanned regional and national gradients of Hg source strength and other factors thought to influence methylmercury bioaccum. Sampled settings include stream basins that were agr¿l, urbanized, undeveloped, and mined. Predator fish were targeted for collection, and composited samples of fish were analyzed for total Hg (THg), as most of the Hg found in fish tissue is MeHg. Samples of bed sediment and stream water were analyzed for THg, MeHg, and characteristics thought to affect Hg methylation, such as loss-on-ignition and acid-volatile sulfide in bed sediment, and pH, dissolved organic carbon, and dissolved sulfate in water. Illus.
Download or read book The Fishes of Alberta written by Joseph S. Nelson and published by University of Alberta. This book was released on 1992 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information on the 59 species of fish found in Alberta, information on identification, distribution, biology, taxonomic history, and angling.
Download or read book Wildlife Ecotoxicology written by John E. Elliott and published by Springer Science & Business Media. This book was released on 2011-08-27 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many books have now been published in the broad field of environmental toxicology. However, to date, none of have presented the often fascinating stories of the wildlife science, and the steps along the way from discovery of problems caused by environmental pollutants to the regulatory and non-regulatory efforts to address the problems. This book provides case by case examinations of how toxic chemical effects on wildlife have brought about policy and regulatory decisions, and positive changes in environmental conditions. Wild animal stories, whether they are about the disappearance of charismatic top predators, or of grossly deformed embryos or frogs, provide powerful symbols that can and have captured the public's imagination and have resulted in increased awareness by decision makers. It is the intent of this book to present factual and balanced overviews and summaries of the science and the subsequent regulatory processes that followed to effect change (or not). We cover a variety of chemicals and topics beginning with an update of the classic California coastal DDT story of eggshell thinning and avian reproduction to more recent cases, such as the veterinarian pharmaceutical that has brought three species of Asian vultures to the brink of extinction. Researchers, regulators, educators, NGOs and the general public will find valuable insights into the processes and mechanisms involved both in environmental scientific investigation and in efforts to effect positive change.
Download or read book Threatened Freshwater Fishes of Europe written by Anton Lelek and published by . This book was released on 1980 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Ecotoxicology written by David J. Hoffman and published by CRC Press. This book was released on 2002-11-13 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised and updated with 18 new chapters, this second edition includes contributions from over 75 international experts. Also, a Technical Review Board reviewed all manuscripts for accuracy and currency. Focusing on toxic substance and how they affect the ecosystems worldwide, the book presents methods for quantifying and measuring ecotoxicological effects in the field and in the lab, as well as methods for estimating, predicting, and modeling in ecotoxicology studies. This is the definitive reference for students, researchers, consultants, and other professionals in the environmental sciences, toxicology, chemistry, biology, and ecology - in academia, industry, and government.
