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 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 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:
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 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 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 Mercury Contamination in the Columbia River Basin Health Risk Assessment of Tribal Exposure Through Subsistence Lifeways written by Angelique Arachy and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Northwest Pacific tribal areas of the Columbia River Basin, fish consumption is important to riverine tribal cultures, and represents deeply held beliefs that have roots in spiritual practices, subsistence lifestyles and community. Therefore, typical fish consumption may exceed levels usually reported for the general U.S. population. A principal exposure pathway of contaminants to riverine tribes is through fish consumption.
Download or read book Quantitative Assessment of Human Health Risk Associated with Mercury Contamination of Fish in Northern Minnesota written by and published by . This book was released on 1977 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Assessing Human Health Risks from Chemically Contaminated Fish in the Lower Columbia River written by Lower Columbia River Bi-State Water-Quality Program and published by . This book was released on 1995 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Health Risk Assessment Mercury in Fish Pine Coulee and Twin Valley Water Management Projects 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 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicological Effects of Methylmercury written by National Research Council and published by National Academies Press. This book was released on 2000-10-27 with total page 365 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 San Diego Bay Health Risk Study written by San Diego County (Calif.). Department of Health Services and published by . This book was released on 1990 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury Contamination in the Northeastern United States written by Hannah Abigail Shayler and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury contamination poses a known threat to human health, yet the degree of contamination and resulting human exposure remains unknown in many regions. Assessments of the relative risks of fish consumption are fundamentally limited by the availability of data characterizing fish consumption behaviors in a given region and the mercury concentrations in fish consumed by humans, as well as by a lack of scientific consensus about how a given level of mercury exposure is likely to affect a particular fish consumer. Existing mercury data and research findings are often not accessible to fish consumers or communicated clearly and consistently. This thesis integrates two related, yet distinct, perspectives regarding how the availability of scientific information affects decision making about the consumption of mercurycontaminated fish through a focused study of the fish consumption and mercury exposure of one community of Adirondack anglers, as well as through a broader consideration of how data collection efforts can best provide information to protect human health. This effort had two overall goals: (1) to characterize how the collection, interpretation, and communication of mercury data influence the availability and clarity of information for decision making about fish consumption; and (2) to recommend how data collection, risk assessment, and risk communication efforts can foster informed, science-based decision making about fish consumption. The first part of this research effort builds upon ongoing assessments of mercury contamination by integrating available local, regional, and national fish mercury datasets with participant consumption records to estimate the mercury exposure of fish consumers (N=17), particularly anglers and families consuming fish species sport-caught from privately owned fishing preserves in the Adirondack region. We compared exposure estimates to measured mercury concentrations in participant hair samples and to recommended health guidelines. The estimated mercury exposure of 35% of participants exceeded the USEPA reference dose for methylmercury; 35% of measured hair mercury concentrations exceeded recommended levels, and the estimated mercury exposure and measured hair mercury concentrations of 29% of participants exceeded both guidelines. Fifty years of angling catch records showed a noticeable decrease in the percentage of the total catch kept for consumption rather than caught and released; this change in angling behavior is estimated to have reduced the mean mercury exposure of our study community from preserve sport-caught fish (e.g., from the waters of private Adirondack fishing preserves alone) by 84%. In the second part of this thesis, we review recent efforts to collect and integrate fish mercury data in the northeastern United States, a region that is particularly influenced by atmospheric deposition of mercury, and provide suggestions to improve and focus future research and monitoring efforts to better address threats to human health. Resource and sampling limitations have hindered comprehensive understanding of mercury in the environment and relative levels of methylmercury exposure through fish consumption. Because of these limitations, data collection should maximize the benefits of information gained by monitoring programs. By selecting appropriate target species - those species and sizes of fish harvested for consumption and those with the highest and most variable mercury concentrations at a given location - health and fisheries professionals can more comprehensively advise fish consumers and inform the protection of human health. Overall, the findings from this study will inform our understanding of: (1) how the availability and clarity of mercury information influence decision making about fish consumption, and (2) how a more comprehensive approach to data collection can more clearly characterize the relative risks to anglers and their families and thereby foster informed, science-based decision making about fish consumption.
Download or read book Human Health Risk Assessment Mercury in Fish in Central Alberta Lac la Nonne and Lac Ste Anne March 2009 written by Alberta. Department of Health and Wellness. Surveillance and Environmental Health and published by . This book was released on 2009 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Health Risk Assessment of Consuming Arsenic containing Fish in San Diego Bay and the Pacific Ocean written by James Richard Smith and published by . This book was released on 1991 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
