Download or read book Mercury in Fish from Rivers and Lakes in Southwestern Northwest Territories written by B. J. Grey and published by Indian and Northern Affairs Canada. This book was released on 1995 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents and interprets mercury data in dorsal muscle tissue from walleye, northern pike, and lake whitefish collected from the Slave River (near Fort Smith) 1988-1990 and from the mouth of the Hay River and Leland Lake (to the east of Fort Smith) 1989-1990.

Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2012 with total page 640 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 Contaminants in Environmental Samples written by David B. Donald and published by . This book was released on 1996 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury Levels in Fishes of Southwestern New Brunswick Lakes written by and published by . This book was released on 2000 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Water Quality Guidelines for the Protection of Aquatic Life written by Canada. Environment Canada and published by . This book was released on 2003 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed by the Government of Canada Depository Services Program.

Download or read book Canadian Tissue Residue Guidelines for the Protection of Consumers of Aquatic Life written by Canada. National Guidelines and Standards Office and published by Office. This book was released on 2002 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document reviews the background information and rationale for the derivation of the Canadian Tissue Residue Guideline (TRG) for methylmercury (MeHg) for the protection of wildlife consumers of aquatic biota. It outlines information on the physical and chemical properties of MeHg, the sources and uses of mercury, production of MeHg, environmental fate and behaviour, bioaccumulation in biota, levels of MeHg in Canadian biota and various environmental media, and describes the toxicological effects of MeHg in mammals and birds.

Download or read book Summary of Mercury Levels in Lakes on the Churchill Rat Burntwood and Nelson River Systems from 1970 to 1979 written by Canada. Department of Fisheries and Oceans. Western Region and published by Department of Fisheries and Oceans. This book was released on 1980 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The levels of mercury in commercially important fish appear to have increased along the Churchill-Rat-Burntwood River System from the early 1970's to 1978 and 1979. There is no clear indication if the mercury levels are still changing except for Rat Lake, in which they have decreased from 1978 to 1979, and for Southern Indian Lake where the mercury levels and changes in the fish vary according to area. In Southern Indian Lake the highest mercury levels are found in Area 1, the South Bay area, for Northern pike, walleye, and lake whitefish and the next highest mercury levels in the fish are in Area 5 at the extreme north end of the lake. In 1979 compared to 1978 the mercury levels have decreased in the walleye from Area 1 and in the whitefish from Area 4, but appear to have remained the same for the other areas and species tested.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impacts of Flow Regulation on the Aquatic Ecosystem of the Peace and Slave Rivers written by Terry Donald Prowse and published by . This book was released on 1996 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NTBS was designed to address the ecological concerns about pulp mill expansion, and to increase scientific knowledge about environmental conditions [ecology, ecosystem sustainability, water pollution and control, habitat, effect on fish and fishing, etc.] in the major river systems of the north. The study's objectives were to gather and interpret sound scientific information about the basins, develop appropriate recommendations for basin management, and communicate effectively with the public. The government response report confirms the governments' commitment to ecosystem sustainability and to pollution control in northern rivers. First Nations and Metis aboriginal [native] peoples contributed significantly to the NRBS.

Download or read book Mercury Exposure Analysis of Mercury Amongst the Dene and M tis Communities of Northwest Territories written by Leicester Fung and published by . This book was released on 2018 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Fish is an important food source for many Indigenous communities within the Dehcho and Sahtú regions of Northwest Territories (NWT). However, environmental toxicants, such as mercury (Hg), can bioaccumulate and biomagnify to reach detectable levels in fish, particularly among predatory fish species. From a public health perspective, Hg exposure and biomonitoring assessments are invaluable assets that can highlight potential risk factors and evaluate risks associated with Hg toxicity. With the current body of knowledge, exposure assessment models conservatively account for Hg bioaccessibility in fish to be 100% because of the limited information available. Past literature have also noted statistical differences in Hg bioaccessibility with respect to food source as well as food preparation methods. As such, there is a need for more Hg biomonitoring and Hg bioaccessibility assessments to elucidate the relationships between dietary and demographic determinants with respect to Hg exposure. Objectives: Hg biomonitoring component. 1) To determine internal Hg exposure levels (blood and hair) from six Indigenous communities in the Dehcho and Sahtú regions of NWT. 2) To conduct t-test analysis for internal Hg exposure levels with respect to sex. 3) To construct simple linear regression models between internal Hg exposure levels with the following factors: i) age ii) non-piscivorous fish consumption iii) piscivorous fish consumption. Hg bioaccessibility component. 1) To characterize Hg concentrations for uncooked and dried by smoking (dried/smoked) lake whitefish (Coregonus clupeaformis). 2) To determine Hg bioaccessibility in uncooked and dried/smoked lake whitefish. 3) To conduct t-test analysis to determine Hg concentration and Hg bioaccesibility differences between uncooked and dried/smoked whitefish. Methods: Hg biomonitoring component. 150 Dene and Métis participants, between the ages of 6-79, were recruited from Deline, Fort Providence, Hay River Reserve, Kakisa, West Point First Nation and Jean Marie River of NWT. Blood and hair samples were collected for internal Hg exposure assessments. Participants were also asked to provide demographic information and complete a food frequency questionnaire (FFQ) for describing potential determinants of Hg exposure. T-test analysis and log-linear simple regression models were used to identify individual relationships. Hg bioaccessibility component. Five whole lake whitefish (Coregonus clupeaformis) were used to investigate Hg bioaccessibility. Subsamples were subjected to two treatments: uncooked and dried/smoked. All dried/smoked and uncooked fish samples underwent a single phase (gastric only) IVBA model treatment. All Hg concentrations were expressed as wet weight and determined using an Ohio-Lumex portable mercury analyzer with pyrolyzer attachment. Results: Hg biomonitoring component. Hg levels in blood and hair were highly linearly-correlated with one another (r= 0.854, p0.05) and all of the participants had blood and hair Hg levels below 20[microgram]/L and 6[microgram]/g respectively. T-test analysis found no statistical differences (p0.05) when comparing blood Hg levels of male and female participants (2.711 ± 2.616 [microgram]/L and 2.667 ± 4.079 [microgram]/L respectively) Similarly, T- test analysis found no statistical differences (p>0.05) when comparing hair Hg levels of male and female participants (0.868 ± 0.925 [microgram]/L and 0.671 ± 0.866 [microgram]/g respectively). According to the simple regression model's findings, age was the only statistically significant factor and was positively associated with blood and hair Hg levels (B=0.020 and p0.01; B=0.011 and p0.01). Based on simple regression model's findings, piscivorous fish consumption was not significantly associated with either Hg levels found within blood and hair (B= 0.068 and p0.05; B= 0.023 and p0.05). Similarly, non-piscivorous fish consumption does not appear to be significantly associated with blood and hair Hg levels (B= 0.022 and p>0.05; B= 0.035 and p>0.05) Hg bioaccessibility component. After culinary treatment, dried/smoked whitefish samples retained, on average, 46% of their original mass (i.e., due to moisture loss). As a result of moisture loss, the initial Hg concentration in dried/smoked whitefish samples (0.194 mg/kg) was significantly greater (p=0.002) relative to uncooked whitefish samples (0.080 mg/kg). When comparing Hg bioaccessibility, dried/smoked whitefish (53%) was statistically lower (p

Download or read book Mercury in Edible Fish Tissue and Sediments from Selected Lakes and Rivers of Washington State written by Steve Fischnaller and published by . This book was released on 2003 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Perspectives on Canadian Marine Fisheries Management written by Canada. Department of Fisheries and Oceans and published by NRC Research Press. This book was released on 1993 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Co-published by: National Research Council of Canada.

Download or read book Pollution of Lakes and Rivers written by John P. Smol and published by John Wiley & Sons. This book was released on 2009-03-12 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its second edition, Pollution of Lakes and Rivers provides essential insights into present-day water quality problems from an international perspective. Explains simply and effectively how lake sediments can be used to reconstruct pollution history Includes over 200 additional references and a new chapter on recent climatic change and its effects on water quality and quantity Tackles present-day water quality problems from an international perspective Previously published by Hodder Arnold PowerPoint slides of the artwork from the book are available from: http://post.queensu.ca/~pearl/textbook.htm Reviews: "This is a very well-written and wide-ranging volume that is both instructive and topical. It is likely to prove useful as an introduction to the general area, a reference source and for teaching purposes." (The Holocene, November 2008) "If you thought that paleolimnology was just mud, pollen, and diatoms then you will likely be both struck by the complexity of this field of research and grateful that John Smol, FRSC, has described it so clearly and broadly. Simply put, the second edition is an excellent book." ( Journal of Phycology, 2008) “This is a useful text. It provides a good level of detail so that the beginner in this area can appreciate what palaeolimnology can (and cannot) achieve. It goes beyond the simple introduction to provide a detailed understanding of how techniques can be applied ... This is a different take on the usual pollution text and would be of great use to those wishing to understand more from sedimentary records.” Taken from the British Ecological Society’s Teaching Ecology website "John Smol has extensive experience in this field of paleoenvironmental research which he combines well with his excellent written communication skills to produce a text that is easy to read but also thought provoking." (Quaternary Science Reviews, 2009) “The breadth of coverage in this text is impressive.” (Lake and Reservoir Management, 2009) “If I could speak with fluidity and clarity in my lectures as consistently as John Smol writes my students would be very grateful.” (Journal of Paleolimnology, 2009)

Download or read book Field Stream written by and published by . This book was released on 1977-05 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: FIELD & STREAM, America’s largest outdoor sports magazine, celebrates the outdoor experience with great stories, compelling photography, and sound advice while honoring the traditions hunters and fishermen have passed down for generations.

Download or read book Metalliferous Mineral Deposits of the Cascade Range in Oregon written by Emma Mertins Thom and published by . This book was released on 1937 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin written by and published by . This book was released on 1937 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: