Download or read book First Western Hemisphere Waterfowl and Waterbird Symposium written by Canadian Wildlife Service and published by The Service. This book was released on 1983 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the International Waterfowl Research Bureau Symposium held in Edmonton, 25-28 May 1982. Includes papers on waterfowl in northern Canada.
Download or read book Wildlife Review written by and published by . This book was released on 1985 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Assessment written by and published by . This book was released on 2000 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Waterfowl in Winter written by Milton Webster Weller and published by U of Minnesota Press. This book was released on 1988 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waterfowl in Winter was first published in 1988. Minnesota Archive Editions uses digital technology to make long-unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. The emphasis in research on waterfowl has traditionally focused on breeding as opposed to migrant or wintering birds. Scientists have long been interested in courtship, nest sites, laying, and brood-rearing, and they have also been concerned about losses of eggs, young, nesting hens, and breeding habitats, especially as they have affected the goal of increasing populations. But lately there has been an upsurge of interest and research on the migratory and wintering phases, and this volume offers ample evidence of the knowledge gained. The authors—105 waterfowl biologists—have contributed 47 chapters that range geographically from Alaska to northern South America, and from the Pacific Northwest to Nova Scotia and Florida. Their subjects include: distributional changes due to human influence; population trends and concerns over less common species; pairing and other behavior that occurs in the wintering areas and is vital to the success of the species; feeding ecology and body condition during winter; new habitats created by such activities as aquaculture and park development; losses of habitat due to development and drainage for alternate uses; lead poisoning and pollutants that are detrimental to waterfowl; habitat management for maintenance of successful populations now and in the future. Also presented are reports of workshop discussions outlining current issues and future research needs. Preparation of this volume was assisted by an editorial board comprising Bruce J. J. Batt, Robert H. Chabreck, Leigh H. Fredrickson, and Dennis G. Raveling.
Download or read book A Passion for Wildlife written by J. Alexander Burnett and published by UBC Press. This book was released on 2011-11-01 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Passion for Wildlife chronicles the history of the Canadian Wildlife Service and the evolution of Canadian wildlife policy over its first half century. It presents the exploits and accomplishments of a group of men and women whose dedication to the ideals of science, conservation, and a shared vision of Canada as a country that treasures its natural heritage has earned them the respect of their profession around the world.
Download or read book The Ecology and Management of Breeding Waterfowl written by and published by U of Minnesota Press. This book was released on 1992 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Populations and Breeding Schedules of Waders Charadrii in High Arctic Greenland written by Hans Meltofte and published by Museum Tusculanum Press. This book was released on 1985 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coastal Wetlands written by Gerardo M.E. Perillo and published by Elsevier. This book was released on 2009-01-18 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal wetlands are under a great deal of pressure from the dual forces of rising sea level and the intervention of human populations both along the estuary and in the river catchment. Direct impacts include the destruction or degradation of wetlands from land reclamation and infrastructures. Indirect impacts derive from the discharge of pollutants, changes in river flows and sediment supplies, land clearing, and dam operations. As sea level rises, coastal wetlands in most areas of the world migrate landward to occupy former uplands. The competition of these lands from human development is intensifying, making the landward migration impossible in many cases. This book provides an understanding of the functioning of coastal ecosystems and the ecological services that they provide, and suggestions for their management. In this book a CD is included containing color figures of wetlands and estuaries in different parts of the world. - Includes a CD containing color figures of wetlands and estuaries in different parts of the world.
Download or read book The Breeding Biology of the Greenland White fronted Goose Anser Albifrons Flavirostris written by and published by Museum Tusculanum Press. This book was released on with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Results of the IWRB International Waterfowl Census 1967 1983 written by A. Rüger and published by . This book was released on 1986 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Freshwaters of Alaska written by Alexander M. Milner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alaska's great size is mirrored by the large number and diversity of its freshwater ecosystems. This volume reviews and synthesizes research on a variety of Alaskan freshwaters including lakes, rivers and wetlands. The vast range of Alaskan habitats ensures that the chapters in this book will provide valuable information for readers interested in freshwaters, particularly nutrient dynamics, biotic adaptations, recovery mechanisms of aquatic biota, stream succession and the management of human-induced changes in aquatic habitats.
Download or read book The Value of Birds written by Antony William Diamond and published by Birdlife International. This book was released on 1987 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wildlife tourism is an increasingly important source of foreign exchange for developing countries, while in the industrial world revenues from birdwatching run into hundreds of millions. Birds are hunted for recreation and subsistence, their eggs harvested, their feathers used in traditional ceremonies. Birds are also recognised as one of the most important indicators of the state of the environment. This book provides many examples of the value of birds as socio-economic resources and bio-indicators, while never losing sight of their intrinsic value. Crammed with bracing counter-arguments to those who see conservation as indifferent or hostile to human interests.
Download or read book Aquatic Birds in the Trophic Web of Lakes written by Joseph J. Kerekes and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Birds are an integral part of most freshwater ecosystems (lakes, rivers, wetlands) but their role in the trophic dynamics of these water bodies has often been overlooked. As a conspicuous part of the biota of water bodies, aquatic birds are indicators of their trophic state both in terms of species composition (quality) as well as occupancy and breeding (quantity). Birds may also influence the trophic state of a water body by importing nutrients (.e.g. resident or migrating birds feeding on adjacent watersheds or the sea). Because of anthropogenic activities, predation or their mobility, birds may not utilize otherwise suitable aquatic habitat. These factors complicate the relationship between aquatic bird production and the trophic status of habitats. As a consequence, the role of aquatic birds in freshwater ecosystems has usually been ignored. This volume contains a wide range of papers selected from those presented at the symposium and reviewed.
Download or read book Canadian Inland Seas written by I.P. Martini and published by Elsevier. This book was released on 2011-09-22 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: The various chapters of this book have been written by researchers who are still working in the Canadian Inland Seas region. The chapters synthesize what is known about these seas, yet much still is to be learnt. It is hoped that this collection of information will serve as a springboard for future, much needed, studies in this fascinating, diverse region, and will stimulate comparative analyses with other subarctic and arctic basins of the world. The Canadian Inland Seas are the only remnants, albeit cold, of the ancient cratonic marine basins which occupied central North America throughout the Paleozoic and part of the Mesozoic. Precambrian rocks and gently dipping Paleozoic sedimentary rocks underlie the seas. The area is also close to the centers of Pleistocene glaciations. The coastal areas represent an emerged landscape of the post-glacial Tyrrell sea, as the region has been isostatically uplifted to about 350 meters since glacial times. A total of 56 fish species inhabit Hudson Bay and James Bay. Seals, whales and one of the largest and southernmost populations of polar bears inhabit the seas as well. The coastal areas are important habitats for migratory bird populations, some of which migrate from as far away as Southern Argentina.The ostic environment has preserved these regions relatively unchanged by man, with only a major harbour at Churchill, Manitoba, which is active for part of the year, and a second large, rail-terminal settlement in the south at Moosonee, Ontario. A few, small, native Indian and Inuit villages dot the coasts. The seas are being affected indirectly by the damming of rivers for the generation of hydroelectric power, and by drainage diversions towards the man-made reservoirs. A major project is being completed in Quebec east of James Bay, but other rivers in Ontario and Manitoba have been dammed as well. Undoubtedly freshwater is one of the more important resources of the area, however its exploitation needs careful thought because of the possible long-range effects on the environment, particularly the coastal marshes, which sustain much of the eastern American intercontinental migratory avifauna. Other resources occur in the regions, primarily minerals and perhaps petroleum. For the most part however, such resources remain to be discovered.
Download or read book Transactions of the North American Wildlife and Natural Resources Conference written by and published by . This book was released on 1986 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes another issue of 1936 ed. without ill.
Download or read book Priority Migratory Bird Habitats of Canada s Prairie Provinces written by Bert Poston and published by North American Waterfowl Management Plan. This book was released on 1990 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report identifies the more important known migratory bird habitat areas and sites within the provinces of Alberta, Manitoba and Saskatchewan. Important habitats for the breeding, moulting and staging of migratory birds are defined. Each area or site is ranked, on the basis of the most current and verifiable biological data, into categories of national, regional, or local importance. Areas and sites are further organized by ecological land units -- ècoregions' and h̀abitat subregions' within a framework of broad geographic ècozones'.
Download or read book Atlas of Nearctic Shorebirds and Other Waterbirds on the Coast of Panama written by R. I. G. Morrison and published by . This book was released on 1998 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents results of aerial surveys undertaken to determine the principal areas used by nearctic shorebirds and other species of water birds on wintering grounds on the coast of Panama. Additional information is presented on numbers and distributions of these groups of birds on the coast of the Gulf of Panama during migration periods. Surveys of wintering populations were carried out in January 1993, while surveys of populations present during southward and northward migration periods were conducted in October 1991 and February 1988 respectively. Information is also included on aerial survey methodology; the geography, physical oceanography, and climate of Panama; and coastal habitats and their distribution in Panama.
