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 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 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 Water resources Investigations Report written by and published by . This book was released on 1990 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pesticides Monitoring Journal written by and published by . This book was released on 1978 with total page 474 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 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 Reconnaissance Investigation of Water Quality Bottom Sediment and Biota Associated with Irrigation Drainage in the American Falls Reservoir Area Idaho 1988 89 written by Walton H. Low and published by . This book was released on 1990 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Life History of the Yellow Perch Perca Flavescens Mitchill in Big Bay de Noc Lake Michigan written by Robert Joseph Toth and published by . This book was released on 1959 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Review written by and published by . This book was released on 1992 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Effects on Young Yellow Perch Perca Flavescens Mitchill written by J. Howard McCormick and published by . This book was released on 1976 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age and Growth of the Yellow Perch Perca Flavescens Mitchill in Clear Lake Iowa 1963 74 written by Roger Allen Bergstedt and published by . This book was released on 1977 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age and Growth of the Yellow Perch Perca Flavescens Mitchill in the Wisconsin Waters of Green Bay and Northern Lake Michigan written by Ralph Hile and published by . This book was released on 1942 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Yellow Perch Perca Flavescens Abundance in Inner Saginaw Bay Lake Huron 1971 2001 written by Sarah Ann Thayer and published by . This book was released on 2002 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Effects of Parental Size and Age on Larval Growth and Development written by Michael Alan Oetker and published by . This book was released on 1998 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
