Environmental Contaminants and Ecology of Bald Eagles in Southcentral Oregon
Author: Richard Wilmarth Frenzel
Publisher:
Published: 1985
Total Pages: 170
ISBN-13:
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Author: Richard Wilmarth Frenzel
Publisher:
Published: 1985
Total Pages: 170
ISBN-13:
DOWNLOAD EBOOKAuthor: Richard L. Knight
Publisher: Island Press
Published: 2013-04-22
Total Pages: 392
ISBN-13: 1610911202
DOWNLOAD EBOOKWildlife and Recreationists defines and clarifies the issues surrounding the conflict between outdoor recreation and the health and well-being of wildlife and ecosystems. Contributors to the volume consider both direct and indirect effects of widlife-recreationist interactions, including: wildlife responses to disturbance, and the origins of these responses how specific recreational activities affect diverse types of wildlife the human dimensions of managing recreationists the economic importance of outdoor recreation how wildlife and recreationists might be able to coexist The book is a useful synthesis of what is known concerning wildlife and recreation. More important, it addresses both research needs and management options to minimize conflicts.
Author: Leland H. Grim
Publisher:
Published: 1995
Total Pages: 36
ISBN-13:
DOWNLOAD EBOOKAnnual number of breeding pairs, fledged eaglets, and reproductive success increased during the study but below reproductive success of healthy bald eagle populations.
Author:
Publisher:
Published: 2001
Total Pages: 302
ISBN-13:
DOWNLOAD EBOOKAuthor: Allen Peterson
Publisher:
Published: 1986
Total Pages: 40
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 2000
Total Pages: 934
ISBN-13:
DOWNLOAD EBOOKAuthor: Michael Gilbertson
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 305
ISBN-13: 940115290X
DOWNLOAD EBOOK`Are the Great Lakes getting better or worse?' This is the question that the public, scientists and managers are asking the International Joint Commission after a quarter-century of cooperative action by the United States and Canadian governments to clean up the Great Lakes. This volume contains papers from the workshop on Environmental Results, hosted in Windsor, Ontario, by the Great Lakes Science Advisory Board of the International Joint Commission, on September 12 and 13, 1996. The Great Lakes have been through almost a century of severe pollution from the manufacture, use and disposal of chemicals. In the 1960s wildlife biologists started to investigate the outbreaks of reproductive failure in fish-eating birds and ranch mink and to link these to exposure to organochlorine compounds. Human health researchers in the 1980s and 1990s linked growth retardation, behavioral anomalies and deficits in cognitive development with maternal consumption of Great Lakes fish prior to pregnancy. The Great Lakes became the laboratory where the theory of endocrine disruptors was first formulated. Now a group of Great Lakes scientists, hosted by the International Joint Commission, has compiled the story of the trends in the concentrations and effects of persistent toxic substances on wildlife and humans. The technical papers review the suitability of various organisms as indicators, and present the results of long-term monitoring of the concentrations and of the incidence of effects. The evidence shows that there was an enormous improvement in the late 1970s, but that in the late 1990s there are still concentrations of some persistent toxic substances that have stubbornly remained at levels that continue to cause toxicological effects.
Author:
Publisher:
Published: 1998
Total Pages: 206
ISBN-13:
DOWNLOAD EBOOKAuthor: United States. Army. Corps of Engineers. Sacramento District
Publisher:
Published: 1992
Total Pages: 410
ISBN-13:
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