Assessment Of The Essential Element And Toxic Heavy Metals In Hatchery Reared Oncorhynchus Mykiss Report
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Microhematocrit As A Tool In Fishery Research And Management
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Author : Stanislas F. Snieszko
language : en
Publisher:
Release Date : 1960
Microhematocrit As A Tool In Fishery Research And Management written by Stanislas F. Snieszko and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Fisheries categories.
Abstract: The micro method of hematocrit is rapidly replacing red cell counts in clinical hematology. Observations were made on the value of this method in routine hematological examination of trouts. Under the conditions of data collection, the normal hematocrit values for brook trout were 45 to 50, for brown trout 39 to 44, and for rainbow trout 45 to 53. There was a close correlation between the hematocrits, red cell counts and hemoglobin. The commercial heparinized capillaries, while excellent for human blood, tend to give somewhat higher readings (7 to 18 percent) with trout, due to incomplete prevention of blood coagulation. The procedure as applied to trout is described in detail.
Arsenic Exposure And Health Effects Iv
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Author : W.R. Chappell
language : en
Publisher: Elsevier
Release Date : 2001-11-27
Arsenic Exposure And Health Effects Iv written by W.R. Chappell and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-11-27 with Technology & Engineering categories.
This collected volume of authoritative articles represents the state-of-the-art in arsenic research. Arsenic experts from around the world, participants in the Fourth International Conference on Arsenic Exposure and Health Effects organized by the Society of Environmental Geochemistry and Health in 2000, present their critical findings. A vital contribution to arsenic study and policy making, this volume examines the global impact of the toxin and discusses arsenic in the environment, mechanisms of arsenic metabolism and carcinogenesis, water treatment technology, and medical care. Arsenic Exposure and Health Effects offers informed, challenging insights into a highly important and controversial topic.
The State Of The World S Aquatic Genetic Resources For Food And Agriculture
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Author : Food and Agriculture Organization of the United Nations
language : en
Publisher: Food & Agriculture Org.
Release Date : 2019-07-24
The State Of The World S Aquatic Genetic Resources For Food And Agriculture written by Food and Agriculture Organization of the United Nations and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-07-24 with Technology & Engineering categories.
The conservation, sustainable use and development of aquatic genetic resources (AqGR) is critical to the future supply of fish. The State of the World’s Aquatic Genetic Resources for Food and Agriculture is the first ever global assessment of these resources, with the scope of this first Report being limited to cultured AqGR and their wild relatives, within national jurisdiction. The Report draws on 92 reports from FAO member countries and five specially commissioned thematic background studies. The reporting countries are responsible for 96 percent of global aquaculture production. The Report sets the context with a review of the state of world’s aquaculture and fisheries and includes overviews of the uses and exchanges of AqGR, the drivers and trends impacting AqGR and the extent of ex situ and in situ conservation efforts. The Report also investigates the roles of stakeholders in AqGR and the levels of activity in research, education, training and extension, and reviews national policies and the levels of regional and international cooperation on AqGR. Finally, needs and challenges are assessed in the context of the findings from the data collected from the countries. The Report represents a snapshot of the present status of AqGR and forms a valuable technical reference document, particularly where it presents standardized key terminology and concepts.
Herbivorous Fishes
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Author : Karol Opuszynski, D.Sc
language : en
Publisher: CRC Press
Release Date : 2019-06-13
Herbivorous Fishes written by Karol Opuszynski, D.Sc and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-06-13 with Technology & Engineering categories.
Published in 1995: This book is not designed as a culture manual for herbivorous fishes, but the reader is directed to other sources. This book should meet the needs that exist for a comprehensive publication on herbivorous fishes.
Fish Physiology Homeostasis And Toxicology Of Essential Metals
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Author :
language : en
Publisher: Academic Press
Release Date : 2011-08-11
Fish Physiology Homeostasis And Toxicology Of Essential Metals written by and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-08-11 with Technology & Engineering categories.
Homeostasis and Toxicology of Essential Metals synthesizes the explosion of new information on the molecular, cellular, and organismal handling of metals in fish in the past 15 years. These elements are no longer viewed by fish physiologists as "heavy metals" that kill fish by suffocation, but rather as interesting moieties that enter and leave fish by specific pathways, which are subject to physiological regulation. The metals featured in this volume are those about which there has been most public and scientific concern, and therefore are those most widely studied by fish researchers. Metals such as Cu, Zn, Fe, Ni, Co, Se, Mo and Cr are either proven to be or are strongly suspected to be essential in trace amounts, yet are toxic in higher doses. The companion volume, Homeostasis and Toxicology of Non-Essential Metals, Volume 31B, covers metals that have no known nutritive function in fish at present, but which are toxic at fairly low levels, such as Ag, Al, Cd, Pb, Hg, As, Sr, and U. In addition, three chapters in Volumes 31A and 31B on Basic Principles (Chapter 1, 31A), Field Studies and Ecological Integration (Chapter 9, 31A) and Modeling the Physiology and Toxicology of Metals (Chapter 9, 31B) act as integrative summaries and make these two volumes a vital set for readers. All major essential metals of interest are covered in metal-specific chapters Each metal-specific chapter is written by fish physiologists/toxicologists who are recognized authorities for that metal A common format is featured throughout this two volume edition
Introduction To Environmental Toxicology
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Author : Wayne G. Landis
language : en
Publisher:
Release Date : 2018
Introduction To Environmental Toxicology written by Wayne G. Landis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Biotic communities categories.
Introduction to environmental toxicology -- Frameworks and paradigms for environmental toxicology -- Overview of toxicity testing methods -- The analysis of exposure-response -- The fate and transport of contaminants -- Uptake and modes of action -- Modification in toxic responses, mixtures and climate change -- Inorganic gaseous pollutants -- Fluoride as a contaminant of developing economies -- Metals -- Biotransformation, detoxification, and biodegradation -- Ecological effects from biomarkers to populations -- Ecological effects: community to landscape scales of toxicological impacts -- Ecological risk assessment -- Index.
Sustainable Land Use And Rural Development In Southeast Asia Innovations And Policies For Mountainous Areas
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Author : Holger L. Fröhlich
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-03
Sustainable Land Use And Rural Development In Southeast Asia Innovations And Policies For Mountainous Areas written by Holger L. Fröhlich and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-03 with Science categories.
This book is based on the findings of a long-term (2000-2014) interdisciplinary research project of the University of Hohenheim in collaboration with several universities in Thailand and Vietnam. Titled Sustainable Land Use and Rural Development in Mountainous Areas in Southeast Asia, or the Uplands Program, the project aims to contribute through agricultural research to the conservation of natural resources and the improvement of living conditions of the rural population in the mountainous regions of Southeast Asia. Having three objectives the book first aims to give an interdisciplinary account of the drivers, consequences and challenges of ongoing changes in mountainous areas of Southeast Asia. Second, the book describes how innovation processes can contribute to addressing these challenges and third, how knowledge creation to support change in policies and institutions can assist in sustainably develop mountain areas and people’s livelihoods.
Small Scale Aquaponic Food Production
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Author : Christopher Somerville
language : en
Publisher: Fao
Release Date : 2015
Small Scale Aquaponic Food Production written by Christopher Somerville and has been published by Fao this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Aquaponics categories.
This technical paper begins by introducing the concept of aquaponics, including a brief history of its development and its place within the larger category of soil-less culture and modern agriculture. It discusses the main theoretical concepts of aquaponics, including the nitrogen cycle and the nitrification process, the role of bacteria, and the concept of balancing an aquaponic unit. It then moves on to cover important considerations of water quality parameters, water testing, and water sourcing for aquaponics, as well as methods and theories of unit design, including the three main methods of aquaponic systems: media beds, nutrient film technique, and deep water culture. The publication discusses in detail the three groups of living organisms (bacteria, plants and fish) that make up the aquaponic ecosystem. It also presents management strategies and troubleshooting practices, as well as related topics, specifically highlighting local and sustainable sources of aquaponic inputs. The publication also includes nine appendixes that present other key topics: ideal conditions for common plants grown in aquaponics; chemical and biological controls of common pests and diseases including a compatible planting guide; common fish diseases and related symptoms, causes and remedies; tools to calculate the ammonia produced and biofiltration media required for a certain fish stocking density and amount of fish feed added; production of homemade fish feed; guidelines and considerations for establishing aquaponic units; a cost-benefit analysis of a small-scale, media bed aquaponic unit; a comprehensive guide to building small-scale versions of each of the three aquaponic methods; and a brief summary of this publication designed as a supplemental handout for outreach, extension and education.
Heavy Metals In The Marine Environment
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Author : Robert W. Furness
language : en
Publisher: CRC Press
Release Date : 2018-01-18
Heavy Metals In The Marine Environment written by Robert W. Furness and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-18 with Science categories.
The aim of this volume is to draw together state-of-the-art reviews of knowledge onlevels of heavy metals in marine environments (particularly in marine animals), the dynamicprocesses in these systems, toxic effects, and threats presented by heavy metals in foods ofmarine origin.All heavy metals, whether biologically essential or not, have the potential to be toxicto organisms at a threshold bioavailability. Such threshold concentrations vary betweenmetals, between species and with the physicochemical characteristics of the medium, somelike copper being particularly toxic even though essential in trace amounts. Responses ofanimals to metals in their medium or food depend to a large extent on the ability of speciesto regulate levels attained in their tissues. Higher animals have the capacity to regulate levelsof many metals, while marine invertebrates can regulate some within certain limits. Whereanimals cannot regulate physiological levels of metals, an alternative strategy is to detoxifyand store metals in relatively harmless forms. Knowledge of the manner in which animals deal with potentially toxic concentrations of heavy metals is of fundamental importance in the assessment of metal pollution by analysis of metal levels in biological samples. The interaction of heavy metals with biological materials is a key theme running through this volume. Toxic effects may be reflected at the individual, population, or ecosystem level, affecting species composition and production levels, or may be of direct dietary significance to man. The global cycling of metals through the marine environment is crucially affected by biological processes.
Feed Ingredients And Fertilizers For Farmed Aquatic Animals
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Author : Albert G. J. Tacon
language : en
Publisher: Food & Agriculture Organization of the UN (FAO)
Release Date : 2009
Feed Ingredients And Fertilizers For Farmed Aquatic Animals written by Albert G. J. Tacon and has been published by Food & Agriculture Organization of the UN (FAO) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Aquacultural engineering categories.
The main body of the document deals with the nutritional composition and usage of major feed ingredient sources in compound aquafeeds, as well as the use of fertilizers and manures in aquaculture operations.