Download or read book Mercury Concentrations in Yellow Perch Perca Flavescens written by Parks Canada. Atlantic Region and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury Concentrations in Yellow Perch Perca Flavescens from 24 Lakes at Kejimkujik National Park Nova Scotia written by Jennifer A. Carter and published by [Halifax, N.S.] : Parks Canada. This book was released on 2001 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a wider study on the bioaccumulation & ecological effects of mercury in freshwater fish & wildlife in Canada, this study measured total mercury in yellow perch from 24 lakes in Nova Scotia. The objectives of the study were to assess mercury concentrations in prey of common loons, which themselves have high mercury levels, and to determine which environmental factors were associated with differences in fish mercury concentrations from lake to lake. Results presented include mean perch mercury concentration & concentration range, correlations of fish characteristics with whole-fish mercury concentrations, and correlations of water chemistry parameters with fish mercury concentrations.
Download or read book Mercury Deposition and Cycling in Northern Wisconsin Lakes and the Effect of a Decrease in Mercury Deposition on Yellow Perch Perca Flavescens Mercury Concentrations written by John Paul Schwalbe and published by . This book was released on 2004 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Influencing Mercury Accumulation in Yellow Perch Perca Flavescens and Aufwuchs in Selected North Central Wisconsin Lakes written by William Gregory Cope and published by . This book was released on 1988 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: I studied mercury (Hg) accumulation in yellow perch (Perca flavescens) and aufwuchs in 11 lakes with a broad range of pH (5.1 to 7.8) and alkalinity ( -12 to 769 ueq/L) in north-central Wisconsin. Mercury uptake was greatest in perch in lakes with alkalinity less than or equal to 40 ueq/L. Multiple regression models, which included combinations of pH, alkalinity, and total Hg concentration and organic content in surficial profundal sediments as independent variables, accounted for 80 to 90% of the variation of Hg burden and concentration in whole yellow perch. Furthermore, preliminary data suggest that Hg concentrations in whole calendar age 2 yellow perch reflect concentrations of the metal in axial muscle tissue of walleyes in north-central Wisconsin lakes. Aufwuchs from artificial substrates accumulated measurable amounts of Hg during 28-d incubation periods; Hg concentrations varied seasonally and were greatest in fall, lowest in spring, and intermediate in summer. Multiple regression models with combinations of five independent variables (pH, alkalinity, total Hg concentration and organic content in surficial profundal sediment, and total watershed area:lake surface area) accounted for 80 to 90% of the variability in Hg concentration and burden (areal) in aufwuchs. When interpretative problems and costs in the use of procedurally defined aufwuchs are considered, the use of a forage fish such as yellow perch seems to be a more efficient approach to monitoring Hg bioavailability. Furthermore, determination of Hg in small yellow perch is a more direct method of assessing potential Hg contamination of gamefish--a topic with human health implications.
Download or read book Mercury Accumulation in Yellow Perch Perca Flavescens Correlated with Age and Growth written by Thomas Leon Jarmon and published by . This book was released on 1973 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury in Yellow Perch perca Falvescens from Lake St Francis and Nearby Tributaries of the St Lawrence River written by Émilie C. Larivière and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury accumulation in fish is a substantial problem in northern temperate regions. Highly variable levels of mercury have been measured in fish from the St. Lawrence River. Here, I used stable isotopes of carbon (delta13C) as tracers of energy source to distinguish food webs of Lake St. Francis (a section of the St. Lawrence River near Cornwall, Ontario) from those of surrounding tributaries and coastal wetlands. I investigated the role of stable isotopes of nitrogen (delta15N) as estimates of trophic position, and I compared mercury accumulation in yellow perch ( Perca flavescens) from Lake St. Francis and the tributaries and coastal wetlands nearby. Since wetlands and tributaries were thought to be the major sites of methylmercury production, I predicted that fish feeding in tributaries would be more contaminated with mercury than fish of the same size or trophic level that are deriving energy from Lake St. Francis. Several components of the food webs of Lake St. Francis and its tributaries and coastal wetlands were sampled for mercury and/or stable isotope analyses (dissolved inorganic carbon (DIC), particulate organic matter (POM), zooplankton, benthic invertebrates, and yellow perch). (Abstract shortened by UMI.).
Download or read book Mercury Analyses of Muscle of Yellow Perch perca Flavescens from Lower Charette Lake Wagon Mound New Mexico written by Elias E. Garcia and published by . This book was released on 1973 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How Habit Type Affects Mercury Concentrations in Yellow Perch and Round Gobies of the Upper St Lawrence River written by Autumn Osgood and published by . This book was released on 2021 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Limnology and Aquatic Birds written by Alan R. Hanson and published by Springer Science & Business Media. This book was released on 2009-03-20 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-term population monitoring is an important tool in our investigations of the role waterbirds play in their environment. This book is international in scope and presents information on species as diverse as the Common Loon, Harlequin Duck, and Semi-Palmated Sandpiper, and habitat in locations ranging from Iceland to Japan. Papers presented in this volume further our understanding of the important role that limnology plays in determining habitat suitability for waterbirds.
Download or read book Environmental Chemistry and Toxicology of Mercury written by Guangliang Liu and published by John Wiley & Sons. This book was released on 2011-11-07 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the fundamentals, recent developments, and future research needs for critical mercury transformation and transport processes, as well as the experimental methods that have been employed in recent studies. The coverage discusses the environmental behavior and toxicological effects of mercury on organisms, including humans, and provides case studies at the end of each chapter. Bringing together information normally spread across several books, this text is unique in covering the entire mercury cycle and providing a baseline for what is known and what uncertainties remain in respect to mercury cycling.
Download or read book Evaluation of a Statistical Model based Prediction of Mercury Concentrations in Ontario Sport Fish written by Eric James DeLong and published by . This book was released on 2012 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the mid-1970s, the Ontario (Canada) Ministry of Environment (OMOE) has been collecting data on fish tissue mercury (Hg) contamination in provincial waterbodies. By 2004, approximately 160,000 fish from 86 species at over 1,600 sites were tested for Hg. This large database is primarily used to issue advisories for safe human fish consumption via publication of the biennial Guide to Eating Ontario Sport Fish. Analysis to uncover spatio-temporal trends while maximising the use of data points is complicated by the application of a non-random heterogeneous sampling design. The National Descriptive Model for Mercury in Fish (NDMMF) developed by the United States Geological Survey (USGS) is a statistical model of Hg concentrations that can potentially mitigate these challenges by separating the spatiotemporal variability of fish-[Hg] sampling while considering the effects of species, size, and fish sample portion type. However, the NDMMF has not been fully exploited, likely due to lack of rigorous evaluation. We conduct the first detailed investigation on the ability of the NDMMF to reproduce the observed fish-[Hg] in coolwater walleye (Sander vitreous) and warm-water yellow perch (Perca flavescens). Approximately two-thirds of both walleye and yellow perch [Hg]-length relationships could be accurately predicted using the NDMMF. For these cases, a majority (>85%) of the estimates are within the same consumption advisory categories as the interpolated [Hg] value based on the observed data, using an average-length fish. For the remaining incidences with significantly different NDMMF fish [Hg]-length relationships compared to those from the observed data, the NDMMF notably yields similar results, with a majority (>75%) of [Hg] estimates still falling within the same consumption advisory categories. For the small fraction of incidences with inaccurate advisory categorization, the instances of conservative over-prediction (
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings and Summary Report written by and published by . This book was released on 2002 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury Concentrations in Fish in Lake Oahe South Dakota April 16 to September 27 1972 written by and published by . This book was released on 1973 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury in Water written by and published by . This book was released on 1977 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mercury in the Environment written by Michael S. Bank and published by Univ of California Press. This book was released on 2012-05-31 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury pollution and contamination are widespread, well documented, and continue to pose a public health concern in both developed and developing countries. In response to a growing need for understanding the cycling of this ubiquitous pollutant, the science of mercury has grown rapidly to include the fields of biogeochemistry, economics, sociology, public health, decision sciences, physics, global change, and mathematics. Only recently have scientists begun to establish a holistic approach to studying mercury pollution that integrates chemistry, biology, and human health sciences. Mercury in the Environment follows the process of mercury cycling through the atmosphere, through terrestrial and aquatic food webs, and through human populations to develop a comprehensive perspective on this important environmental problem. This timely reference also provides recommendations on mercury remediation, risk communication, education, and monitoring.
Download or read book The Osprey written by Tim Mackrill and published by Bloomsbury Publishing. This book was released on 2024-02-29 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: A highly readable Poyser monograph on one of the most widespread raptors. The Osprey is a large, fish-eating bird of prey. Distinctively marked in deep brown and white, with a piercing yellow eye and powerful hooked bill, the Osprey snatches its prey in spectacular swoops above lakes and wetlands around the world it is one of the most widespread of all birds. Persecuted mercilessly in Britain, it became extinct in the 1890s before returning to the famous Loch Garten in Scotland in the 1950s. The return of the bird has been slow, but reintroduction programmes elsewhere notably at Rutland Water have been successful, and this remarkable raptor is an increasingly common sight in our skies. This Poyser monograph is dedicated to this fine species and includes more than 150 colour photographs. The Osprey looks at the distribution, foraging ecology, migration, breeding behaviour and population dynamics of this spectacular bird, with emphasis placed on conservation efforts both in Britain and in the species' African haunts, which have been discovered only very recently thanks to advances in satellite tagging technology.
