Download or read book Development of a Risk Assessment Tool for Mercury in Fish written by Reena Pahal and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fish can accumulate high levels of mercury (Hg) and become a human health concern if consumed. The purpose of this study was to develop a risk assessment tool to determine which water bodies from certain areas in Northern British Columbia contain fish with high Hg concentrations. Raw and published data were collected from Health Canada and Ministry of Environment and amalgamated to form a large data set (3097 fish samples from 34 distinct areas between 1974 and 2000). Fish weight was standardized and a cut-off point was determined for each species for high Hg levels. This was used to develop a risk assessment tool unique to the study area to identify which species/water body combinations were high in Hg and how fish consumption strategies can be adapted to minimize exposure. Although high Hg levels were widespread, the majority of contaminated samples were form Pinchi Lake and the Williston Lake area."--Leaf ii.
Download or read book Human Health Risk Assessment of Mercury in Fish and Health Benefits of Fish Consumption written by and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: March 2007 and Health Benefits of Fish Consumption The Bureau of Chemical Safety would like to acknowledge the contribution of the following organizations in the development of this document: Bureau of Nutritional Sciences, Food Directorate, Health Products and Food Branch, Health Canada Office of Nutrition Policy and Promotion, Health Products and Food Branch, Health Canada Healthy Environments a [...] BACKGROUND 1.1 Purpose of this document 1.2 Sources of Human Exposure to Mercury 1.3 The Chemical Forms of Mercury in Fish 1.4 The Ratio of Methylmercury to Total Mercury in Retail Fish 2.0 HAZARD CHARACTERISATION: HEALTH HAZARDS OF METHYLMERCURY 3.0 HEALTH BENEFITS OF FISH CONSUMPTION 4.0. [...] The need for a management strategy to reduce the risk of unacceptable exposures to mercury from fish consumption was first identified by the Health Protection Branch (now the Health Products and Food Branch) of Health Canada in the late 1960s, when it established a standard1 for mercury in fish. [...] The An-3@ indicates that, starting from the end of the carbon-chain furthest from the acid portion of the molecule, the first double bond appears at the third carbon. [...] In the assessment of risk of methylmercury exposure through fish consumption, BCS did not consider, in a quantitative manner, the nutritional benefits of fish consumption against the risks of methylmercury exposure.
Download or read book Updating the Existing Risk Management Strategy for Mercury in Retail Fish written by and published by . This book was released on 2007 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the development of risk management options for mercury in fish based on the health risk assessment of mercury in fish.
Download or read book Toxicological Effects of Methylmercury written by National Research Council and published by National Academies Press. This book was released on 2000-09-27 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury is widespread in our environment. Methylmercury, one organic form of mercury, can accumulate up the aquatic food chain and lead to high concentrations in predatory fish. When consumed by humans, contaminated fish represent a public health risk. Combustion processes, especially coal-fired power plants, are major sources of mercury contamination in the environment. The U.S. Environmental Protection Agency (EPA) is considering regulating mercury emissions from those plants. Toxicological Effects of Methylmercury reviews the health effects of methylmercury and discusses the estimation of mercury exposure from measured biomarkers, how differences between individuals affect mercury toxicity, and appropriate statistical methods for analysis of the data and thoroughly compares the epidemiological studies available on methylmercury. Included are discussions of current mercury levels on public health and a delineation of the scientific aspects and policy decisions involved in the regulation of mercury. This report is a valuable resource for individuals interested in the public health effects and regulation of mercury. The report also provides an excellent example of the implications of decisions in the risk assessment process for a larger audience.
Download or read book A Human Health Risk Assessment of Mercury in Fish from the San Diego River written by and published by . This book was released on 2015 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methylmercury is the most toxic organic form of mercury in the environment and humans are exposed mainly from the consumption of contaminated fish and shellfish. Methylmercury poisoning can cause adverse health effects including muscle weakness, disrupted motor function, and memory loss, and prenatal exposure can lead to problems with mental and motor development once a child is born. The utilization of the San Diego River in San Diego, CA for recreational and subsistence fishing has created a need for updated information on the human health risk posed by consumption of fish from the river. This study quantified the levels of Methylmercury found in four fish species (Micropterus salmoides or largemouth bass, n=20; Lepomis macrochirus or bluegill, n=11; Lepomis cyanellus, or green sunfish, n=4; and Ameiurus nebulosus or brown bullhead, n=3) from three locations on San Diego River. Muscle tissue analysis was carried out with a DMA-80 Direct Mercury Analyzer. Mercury levels from existing data for largemouth bass from El Capitan Reservoir was also used. A human health risk assessment was completed with data from this study and the El Capitan data set to calculate hazard quotients for 11 different scenarios for recreational and subsistence fishers in the San Diego River. Adverse health effects are likely to occur for recreational fishers who catch and consume maximally contaminated largemouth bass from El Capitan Reservoir, or all study species from the river at the rate of 17.5 g/day. Adverse health effects are also likely to occur for subsistence fishers who catch and consume only large mouth bass, a combination of large mouth bass and bluegill, or all study species from the river at the rate of 142.4 g/day. Additionally, adverse health effects were shown likely to occur for subsistence fishers who catch and consume largemouth bass from El Capitan Reservoir, however these risks are rare due to the financial burden associated with fishing at the reservoir. Overall, consuming fish caught from the San Diego River can be considered safe for recreational fishers, however subsistence fishers should limit their consumption to four 8-ounce servings of any species per week, or target only bluegill.
Download or read book Assessment of Louisiana s Fish Tissue Mercury Levels Sportfish Consumption Methylmercury Intake and Potential Risk written by Adrienne Lee Katner and published by . This book was released on 2011 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Health Risk Assessment for Mercury in Fish from Mission Bay and San Diego Bay California written by Meredith F. Knobler and published by . This book was released on 1998 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury and Methylmercury Toxicology and Risk Assessment written by Laurie Hing Man Chan and published by MDPI. This book was released on 2019-06-24 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury is a global pollutant that affects the health of both humans and ecosystems. This Special Issue collects three review papers and six research articles that report on the latest findings on the mechanisms of mercury toxicology and its impacts on environmental health. This collection of papers provides useful, new information on the mechanisms of mercury toxicity and methods of improving the risk assessment of mercury exposure.
Download or read book Guidance for Assessing Chemical Contaminant Data for Use in Fish Advisories written by and published by . This book was released on 1996 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Health Risk Assessment written by Alberta. Department of Health and Wellness. Surveillance and Assessment and published by . This book was released on 2009 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Health Risk Assessment Mercury in Fish Rivers and Lakes Southern Alberta October 2009 written by Alberta. Department of Health and Wellness. Surveillance and Assessment and published by . This book was released on 2009 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Risk Assessment of Consumption of Mercury PCBS and Chlorinated Pesticides from Fish Caught Off the Imperial Beach Pier San Diego California written by Brittany Agnes Finnegan and published by . This book was released on 2010 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: A risk assessment was performed on intake of certain chemicals from the consumption of fish caught off the Imperial Beach Pier. Risk assessment is a necessary tool to understand possible adverse effects to human health caused by ingestion of fish in this region. Mercury, PCBs, and chlorinated pesticides are all persistent pollutants with the ability to bioaccumulate in aquatic organisms. Ten fish samples caught from fishermen on the Imperial Beach Pier were donated for laboratory analysis to assess the presence of these chemicals in fish tissue. In concert with that, 182 fishermen on the pier were surveyed about their fishing and consumption patterns. Values from the chemical analyses and surveys were used to estimate the risk posed by eating fish caught in the region. Surveys revealed fishermen who ingested catch were primarily Asian males over the age of 56. Each fish analyzed contained levels of mercury and 4,4'-DDE and three specimens showed detectable levels of PCBs. For mercury, the health hazard was insignificant for average consumption, yet posed a threat when high exposure values were used (hazard index = 6.8). DDE and PCBs levels revealed a less than de minimus cancer risk for average consumption, however the most exposed population modeled an excess risk of 14 persons out of a population of one million for DDE and 630 persons out of a population of one million for PCBs. High risk values are only applicable to a small high risk population of subsistence fishermen, and although only a marginal risk for human health exists, it may still be cause for concern for these few in the population.
Download or read book Predicting the Risk of Mercury Exposure Related to Freshwater Fish Consumption a Model for Qualitative Risk Assessment of Environmental Threats to Public Health written by Alissa Barron and published by . This book was released on 2001 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of the Necessity Feasibility and Potential Strategies for the Creation Implementation and Dissemination of Mercury related Fish Consumption Guidelines in British Columbia written by Rebecca Alexia Giampietro McMackin and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Departments of Veterans Affairs and Housing and Urban Development and Independent Agencies Appropriations for 1998 written by United States. Congress. House. Committee on Appropriations. Subcommittee on VA, HUD, and Independent Agencies and published by . This book was released on 1997 with total page 1492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Risk Assessment of Methylmercury in Fish written by Kierstin Petersson-Grawé and published by . This book was released on 2007 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Framework for Assessing Effects of the Food System written by National Research Council and published by National Academies Press. This book was released on 2015-06-17 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: How we produce and consume food has a bigger impact on Americans' well-being than any other human activity. The food industry is the largest sector of our economy; food touches everything from our health to the environment, climate change, economic inequality, and the federal budget. From the earliest developments of agriculture, a major goal has been to attain sufficient foods that provide the energy and the nutrients needed for a healthy, active life. Over time, food production, processing, marketing, and consumption have evolved and become highly complex. The challenges of improving the food system in the 21st century will require systemic approaches that take full account of social, economic, ecological, and evolutionary factors. Policy or business interventions involving a segment of the food system often have consequences beyond the original issue the intervention was meant to address. A Framework for Assessing Effects of the Food System develops an analytical framework for assessing effects associated with the ways in which food is grown, processed, distributed, marketed, retailed, and consumed in the United States. The framework will allow users to recognize effects across the full food system, consider all domains and dimensions of effects, account for systems dynamics and complexities, and choose appropriate methods for analysis. This report provides example applications of the framework based on complex questions that are currently under debate: consumption of a healthy and safe diet, food security, animal welfare, and preserving the environment and its resources. A Framework for Assessing Effects of the Food System describes the U.S. food system and provides a brief history of its evolution into the current system. This report identifies some of the real and potential implications of the current system in terms of its health, environmental, and socioeconomic effects along with a sense for the complexities of the system, potential metrics, and some of the data needs that are required to assess the effects. The overview of the food system and the framework described in this report will be an essential resource for decision makers, researchers, and others to examine the possible impacts of alternative policies or agricultural or food processing practices.
