Download or read book The Effects of Dissolved Oxygen Temperature and Ammonia in the Aquatic Environment on Fishes written by Alberta. Department of the Environment. Planning Division and published by . This book was released on 1983 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of the Interaction of Environmental Factors hypoxia and Ammonia on Fish written by Timothy Michael Parker and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Hypoxia is a common phenomenon in aquatic environments which most frequently occurring during late summer or late winter. Hypoxic events are increasing in intensity as water temperatures increase, and it is important to understand how hypoxia affects aquatic ecosystems, particularly fish. Additionally, increases in ammonia concentrations have been shown to occur during periods of hypoxia. Ammonia is converted to nitrate in aquatic environments through nitrification, via the nitrogen cycle. However, this process is carried out by aerobic bacteria and is depressed by hypoxia. Ammonia has been shown to be more toxic to fish during hypoxia than during normoxia, indicating that it could have large implications on fish foraging activity in hypoxic waters. While fish have reduced growth in hypoxic water, the simultaneous accumulation of ammonia may result in death. Therefore, evaluation of how hypoxia affects fish simultaneously exposed to ammonia is essential to understand how fish are affected during natural hypoxic events, such as those that occur in the hypolimnion of Lake Erie. Juvenile yellow perch were reared under varied oxygen conditions to examine how hypoxia affects growth and survival of fish. Yellow perch are a physoclistous fish which can result in irreversible failure to inflate the swim bladder. Therefore, fish with both inflated and uninflated swim bladders were tested at different concentrations of oxygen for survival, growth, and oxygen consumption to gain a better understanding of how hypoxia affects yellow perch. Fish were stocked into 12 tanks with three levels of oxygen: 3, 4, and >7 mg O2/L (33, 45, & >78% saturation at 21 degrees Celsius). Fish were fed ad libitum with live brine shrimp nauplii over a 14-day period. Oxygen consumption was measured at the end of the experimental trial. Survival was not affected by lowered dissolved oxygen, but growth was reduced significantly in fish with both inflated (at 32% oxygen saturation) and uninflated swim bladders (at 33% and 48% oxygen saturation). This indicated that fish without swim bladders were less tolerant of hypoxia. Oxygen consumption was dependent on oxygen level, but did not differ between fish with inflated and uninflated swim bladders. The critical oxygen level causing a decrease in oxygen consumption of yellow perch was 3.5 mg/L O2. Results from this study indicated that larval/juvenile yellow perch are able to survive lowered dissolved oxygen levels, but are faced with 50% and 24% reduced growth in fish with uninflated and inflated swim bladders, respectively. Elevated ammonia is commonly associated with hypoxia in aquatic environments, and it is important to study the interactive effects of simultaneous exposure of hypoxia and ammonia on fish. Hypoxia has been shown to cause gill remodeling in some species of fish, which involves reduction of interlamellar cell mass to increase respiratory surface area. However, ammonia has been shown to cause severe damage to gills, limiting the respiratory, ionregulatory, and excretory efficiency of the gills. In this study, common carp (Cyprinus carpio) were exposed simultaneously to ammonia and a range of oxygen concentrations to assess how oxygen concentrations might affect ammonia toxicity. Histology of gill tissue was examined to observe how the gills of carp responded to hypoxia, hypoxia and ammonia simultaneously, and how gills recovered in normoxic conditions. Carp were exposed to three levels of oxygen 8.8 ± 1.1, 2.7 ± 0.5 and 1.6 ± 0.6 mg O2/L. The 24-h LC50 for the three respective levels of oxygen were 0.66 (0.55-0.81), 0.50 (0.38-0.66), and 0.45 (0.35-0.52) NH3-N/L. The histological results showed that gill remodeling was not present in carp. Gills however did undergo severe histopathological changes when exposed to ammonia and hypoxia simultaneously, emphasizing the importance of monitoring water quality when the effects of lowered dissolved oxygen on fish are examined. This work has serious ecological implications for distribution and growth of yellow perch in the Great Lakes due to changes in hypolimnion oxygen and ammonia levels under current conditions and simulations that forecast more frequent and severe hypoxic events.
Download or read book The Sources Chemistry Fate and Effects of Ammonia in Aquatic Environments written by and published by . This book was released on 1981 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physiology of Fish in Intensive Culture Systems written by Gary A. Wedemeyer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fish culture in hatcheries and other aquacultural facilities is becoming much more intensive all over the world. The success of all kinds of fish rearing depends on the quality of management and this depends, in turn, on understanding the biology of fishes and the aquatic environment in which they live. This book directly addresses the relationship between the aquatic environment and the fishes. An understanding of this by the reader will result in a reduction of disease outbreaks through improved management.
Download or read book Aqueous Ammonia Equilibrium written by Robert V. Thurston and published by . This book was released on 1979 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Pollutants on Aquatic Organisms written by A. P. M. Lockwood and published by CUP Archive. This book was released on 1976-09-02 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Dissolved Oxygen Criteria for Freshwater Fish written by Charles E. Warren and published by . This book was released on 1973 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Chemical Variations in Aquatic Environments written by Watson Harry Everhart and published by . This book was released on 1973 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Quality and Fish Health written by Zdeňka Svobodová and published by Food & Agriculture Org.. This book was released on 1993 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Physiology Toxicology and Water Quality Management written by Rosemarie C. Russo and published by . This book was released on 1993 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissolved Oxygen Temperature Survival of Young at Fish Spawning Sites written by John J. Peterka and published by . This book was released on 1976 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish and River Pollution written by J. R. Erichsen Jones and published by Elsevier. This book was released on 2013-10-22 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fish and River Pollution deals with experimental and field research connected with the effects of pollution in fish, and the useful data gathered from these studies. After reviewing some experiments made on the effects of pollution on fish, the author discusses pollution by oxygen-reducing effluents such as sewage, milk washing, and other solutions that can be broken down by microorganisms, a process that uses up dissolved oxygen in the water. The experiments conducted by Shelford and Allee, which the author cites, studies the reactions of fish to different concentrations of atmospheric gases, particularly as fish detect low concentrations of oxygen more sensitively than man. The paper also discusses the time-effect relationship of a toxic substance to fish as immersion time, time needed for advancement, minimum time of exposure, and immersion time to fatality. The effect of thermal pollution such as that generated in thermal plants to produce electricity, though chemically toxic-free, can significantly change the temperature of the water where fish live. Such temperature change can affect water viscosity, rate of water oxygen absorption, development of sewage fungus, and changes in natural invertebrate fauna. This book can be appreciated by environmentalists, aquatic researchers, zoologists, and marine biologists.
Download or read book Heated Effluents and Effects on Aquatic Life with Emphasis on Fishes written by Edward Cowden Raney and published by . This book was released on 1969 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Culture of Fish in Rice Fields written by Matthias Halwart and published by WorldFish. This book was released on 2004 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DUCKDATA written by Beth A. K. Coughlan and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management of Animal Care and Use Programs in Research Education and Testing written by Robert H. Weichbrod and published by CRC Press. This book was released on 2017-09-07 with total page 917 pages. Available in PDF, EPUB and Kindle. Book excerpt: AAP Prose Award Finalist 2018/19 Management of Animal Care and Use Programs in Research, Education, and Testing, Second Edition is the extensively expanded revision of the popular Management of Laboratory Animal Care and Use Programs book published earlier this century. Following in the footsteps of the first edition, this revision serves as a first line management resource, providing for strong advocacy for advancing quality animal welfare and science worldwide, and continues as a valuable seminal reference for those engaged in all types of programs involving animal care and use. The new edition has more than doubled the number of chapters in the original volume to present a more comprehensive overview of the current breadth and depth of the field with applicability to an international audience. Readers are provided with the latest information and resource and reference material from authors who are noted experts in their field. The book: - Emphasizes the importance of developing a collaborative culture of care within an animal care and use program and provides information about how behavioral management through animal training can play an integral role in a veterinary health program - Provides a new section on Environment and Housing, containing chapters that focus on management considerations of housing and enrichment delineated by species - Expands coverage of regulatory oversight and compliance, assessment, and assurance issues and processes, including a greater discussion of globalization and harmonizing cultural and regulatory issues - Includes more in-depth treatment throughout the book of critical topics in program management, physical plant, animal health, and husbandry. Biomedical research using animals requires administrators and managers who are knowledgeable and highly skilled. They must adapt to the complexity of rapidly-changing technologies, balance research goals with a thorough understanding of regulatory requirements and guidelines, and know how to work with a multi-generational, multi-cultural workforce. This book is the ideal resource for these professionals. It also serves as an indispensable resource text for certification exams and credentialing boards for a multitude of professional societies Co-publishers on the second edition are: ACLAM (American College of Laboratory Animal Medicine); ECLAM (European College of Laboratory Animal Medicine); IACLAM (International Colleges of Laboratory Animal Medicine); JCLAM (Japanese College of Laboratory Animal Medicine); KCLAM (Korean College of Laboratory Animal Medicine); CALAS (Canadian Association of Laboratory Animal Medicine); LAMA (Laboratory Animal Management Association); and IAT (Institute of Animal Technology).
Download or read book Effects of Dissolved Oxygen on Survival and Behavior of Selected Fishes of Western Lake Erie written by Gedeon D. Petit and published by . This book was released on 1973 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
