Download or read book Toxicity of Prudhoe Bay Crude Oil to Mallard Duck anas Platyrhynchos Embryos written by Wanjala Simiyu Lusimbo and published by . This book was released on 1999 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicity of Prudhoe Bay Crude Oil to Mallard Duck i anas Platyrhynchos i Embryos written by and published by . This book was released on 1901 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was undertaken to assess rates and timing of mortality and hatchability, to identify pathological changes and compare them to those observed in chicken embryos, and to determine whether mallard duck chorioallantoic membrane (CAM) is a target organ of toxicity of Prudhoe Bay crude oil (PBCO). Mortality and hatchability were determined in embryos exposed to 10[mu]l of PBCO on days 3, 6, 9 and 12 of incubation. Pathological changes in embryos and the CAM, hematological parameters and body and plasma calcium concentration were assessed in live embryos exposed to PBCO on day 12. Oil-exposed embryos had high mortality, low hatchability and high prevalence of pathological changes. Mortality was characterized by initial death that coincided with development and maturation of the CAM and a sublethal effect that resulted in live, mature embryos, which were unable to hatch. This mortality at hatching contributed greatly to total mortality. Lesions included hepatic and renal necrosis, liver enlargement, subcutaneous edema, reduced body weight and ratio of body weight to fresh egg weight, short crown-rump, third toe and metatarsal lengths, depletion of lymphocytes in the bursa of Fabricius, renal hematopoiesis, and diffuse changes in the CAM which included necrosis and hyperplasia, of chorionic epithelium, soft swelling of mesenchymal cells, hemorrhages and reduced vascular density. There also were high proportions of reticulocytes and polychromatophilic and primary erythrocytes. Prevalence of lesions in the CAM was greatest during the stage of acute toxicity, suggesting that injury to the CAM may have a role in acute oil. toxicity. The distribution of lesions in the CAM suggests a direct effect on the CAM cells of toxic components or their metabolites. Injury to the CAM did not affect its role in mobilization of calcium from the eggshell. Body and plasma calcium in oil-exposed and control embryos were not different. Embryos exposed to PBCO did not develop anemia nor.

Download or read book Seabird Oil Toxicity Study written by and published by . This book was released on 1987 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Characterization of the North Aleutian Shelf Nearshore Region written by and published by . This book was released on 1983 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Impact of Naturally Weathered North Slope Crude Oil on Reproduction and Survival in Mallards written by Gregg Allan Hancock and published by . This book was released on 1991 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Outer Continental Shelf Environmental Assessment Program written by and published by . This book was released on 1986 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1980 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Diseases of Poultry written by Aly M. Fadly and published by John Wiley & Sons. This book was released on 2009-04-13 with total page 1410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its Twelfth Edition, Diseases of Poultry continues its tradition of excellence as the definitive reference of poultry disease. Following the same user-friendly format, the book has been thoroughly updated to reflect the most current knowledge of avian pathology, including new coverage of genetic resistance to disease. Coverage is given to both common and uncommon diseases, and chapters are organized by disease type, including viral, bacterial, fungal, parasitic diseases as well as others, such as nutritional, developmental, metabolic, noninfectious diseases and toxins. Each disease section provides detailed coverage of history, etiology, pathobiology, diagnosis, and intervention strategies, as well as the economic and public health significance of each disease. With a host of international authors, Diseases of Poultry is a must-have resource for all veterinary pathologists, practitioners, agricultural managers and industry leaders involved in poultry health and production.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicology Abstracts written by and published by . This book was released on 1982 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes annual author and subject indexes.

Download or read book Department of the Interior and Related Agencies Appropriations for 1986 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1985 with total page 1358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diseases of Poultry written by J.R. Glisson and published by John Wiley & Sons. This book was released on 2013-07-16 with total page 2990 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diseases of Poultry is the most comprehensive reference for all aspects of poultry health and diseases, including pathogenesis, diagnostics, epidemiology, and control methods. Published in partnership with the American Association of Avian Pathologists, the Thirteenth Edition remains the international definitive reference, adding newer diagnostic methods and a new chapter on the emerging importance of zoonotic infections for poultry pathogens. Other updates include new high-quality photographs, additional discussion of conceptual operational biosecurity and disease control in organic production systems, and a greater emphasis throughout on the differences in disease incidence and treatments for the United States and other areas around the globe. Organized logically by disease type, the book offers detailed coverage of the history, etiology, pathobiology, diagnosis, and intervention strategies, as well as the economic and public health significance, for an exhaustive list of common and uncommon diseases. Diseases of Poultry, 13th Edition is an essential purchase for poultry veterinarians, veterinary diagnosticians, poultry scientists, students specializing in poultry health, and government officials who deal with poultry health in regulatory climate.

Download or read book Reviews in Environmental Toxicology written by and published by . This book was released on 1984 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Basic Environmental Toxicology written by Lorris G. Cockerham and published by Routledge. This book was released on 2019-07-05 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic Environmental Toxicology provides a thorough, systematic introduction to environmental toxicology and addresses many of the effects of pollutants on humans, animals, and the environment. Readers are introduced to the fundamentals of toxicology and ecotoxicology, the effects of different types of toxicants, and how toxicants affect different compartments of the environment. Fundamental aspects of environmental health, occupational health, detection of pollutants, and risk assessment are discussed. The book is excellent for anyone involved in risk assessment or risk management, toxicologists, state and local public health officials, environmental engineers, industrial managers, consultants, and students taking environmental toxicology courses.