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Repartition Des Grands Herons Nicheurs Et Tendances Demographiques Au Quebec 1977 2001
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Book Synopsis Répartition des Grands Hérons nicheurs et tendances démographiques au Québec, 1977-2001 by : Jean-Luc DesGranges
Download or read book Répartition des Grands Hérons nicheurs et tendances démographiques au Québec, 1977-2001 written by Jean-Luc DesGranges and published by . This book was released on 2006 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Breeding Distribution and Population Trends of the Great Blue Heron in Quebec, 1977-2001 by : Jean-Luc DesGranges
Download or read book Breeding Distribution and Population Trends of the Great Blue Heron in Quebec, 1977-2001 written by Jean-Luc DesGranges and published by . This book was released on 2006 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regular surveys of Great Blue Heron (Ardea herodias) colonies in Quebec, conducted between 1977 and 2001, resulted in the discovery of 705 colonies, mostly in the western part of the province. While single breeding pairs were occasionally found (9% of Quebec "heronries"), the colonies were generally composed of fewer than 16 breeding pairs, with sometimes over 50 (18 known colonies), as was the case on several islands in the St. Lawrence River. Close to one-third (1919 of the 6481 active nests) of the Quebec Great Blue Heron population was associated with heronries in the St. Lawrence system. Half of the St. Lawrence heronries that were active during two adjacent survey periods (1975-1983 and 1984-1990, or 1984-1990 and 1991-2001) increased in size between periods, while one-third of the colonies decreased in size. One-sixth of the colonies remained the same size during the study period. Great Blue Herons periodically abandon their colonies and settle elsewhere. Our data show that 50% of known Quebec colonies (n = 377 colonies visited more than once) were abandoned after being discovered as active colonies, and, on average, all nests in colonies that are abandoned disappear 7 years after discovery of the colony. On the basis of thorough inventories conducted on the St. Lawrence, we found that all nest platforms in 14 of the 70 colony sites had disappeared in less than 25 years. Since 1977, when regular surveys began, 50-90% of breeding attempts have been successful, yielding an average of over 2.2 chicks per pair. This productivity rate suggests that the Quebec population of Great Blue Herons may be increasing and may explain the recent expansion in its range. Following our 25 years of investigation on the Great Blue Heron in the province, we estimate the current late-summer Great Blue Heron population of Quebec at some 27 000 individuals (6500 pairs producing 2.2 young per pair per year).--Publisher's description.
Book Synopsis Occasional Paper - Canadian Wildlife Service by :
Download or read book Occasional Paper - Canadian Wildlife Service written by and published by . This book was released on 1957 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Atlas of Bird Banding written by and published by . This book was released on 2000 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wetland Modelling written by W.J. Mitsch and published by Elsevier. This book was released on 2012-12-02 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of wetlands is a relatively new field and the modelling of these systems is still in its formative stages. Nevertheless, the editors felt compelled to assemble this volume as a first statement of the state of the art of modelling approaches for the quantitative study of wetlands. A global approach has been adopted in this book, not only by including a wide geographic distribution of wetlands, but also by including papers on both freshwater and saltwater wetlands. Wetlands are defined as systems intermediate between aquatic and terrestrial ecosystems, and include ecosystems under a wide range of hydrologic and ecologic conditions. The wetland types discussed in this book reflect that heterogeneity, ranging from intermittently flooded wet meadows to permanently flooded shallow reservoirs and lakes. Also included are modelling examples from coastal salt marshes, shallow estuaries, mesotrophic bogs, reedswamps, forested swamps, and regional wetlands. In summary, the book presents ecological modelling as a tool for management of these sensitive ecosystems, and for studying their structure and function. Each chapter has extensive references related to the modelling approach and wetland type discussed. It will be useful for wetland scientists and managers, and could also serve as a supplemental text on courses in wetland ecology.
Book Synopsis Lake Erie and Lake St. Clair Handbook by : S. J. Bolsenga
Download or read book Lake Erie and Lake St. Clair Handbook written by S. J. Bolsenga and published by Wayne State University Press. This book was released on 1993 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn about the wonders of Lake Erie and Lake St. Clair in this fascinating and readable book. The most comprehensive reference source available about the lakes, Lake Erie and Lake St. Clair Handbook is an ideal guide for anglers, boaters, swimmers, beach walkers—anyone who uses and enjoys the lakes. The handbook explains, in simple terms, the reasons for the scenic beauty and the natural events that occur in the coastal and offshore waters of Lake Erie and Lake St. Clair, including the St. Clair, Detroit, and Niagara rivers extending from Sarnia, Ontario, to Niagara-on-the-Lake, New York. Individual chapters focus on the land, air, water, and life forms that comprise the natural history and environment of the region—the shoreline topography, wind and weather patterns, water temperature cycles and water level changes, the ecology, and indigenous animal life. Lake Erie and Lake St. Clair Handbook enhances our understanding and appreciation of the lakes and their surroundings by addressing fundamental questions about the Lake Erie region: • how Lake Erie was formed through glacial processes • why daily and seasonal weather patterns occur • causes of the water currents and waves • causes of temperature patterns in the lakes • the location of productive reef features • the species of fish and birds found in the area • the importance of the wetlands • the effect of current and past pollution on the aquatic life in the lakes
Book Synopsis Where Land Meets Water by : Canadian Wildlife Service
Download or read book Where Land Meets Water written by Canadian Wildlife Service and published by Environment Canada. This book was released on 2002 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication summarizes the current state of knowledge about Great Lakes coastal wetlands based on the information presented at the Millennium Wetland Event symposium. Information on wetland development and classification, summaries of wetland vegetation communities, and details of the fish and wildlife species that use Great Lakes coastal wetlands as habitat are all found within the following pages. Wetland conservation initiatives and some of the challenges of performing wetland science in such a large and diverse environnment are also highlighted.
Book Synopsis Effects of the Nestucca Oil Spill on Seabirds Along the Coast of Vancouver Island in 1989 by : Alan E. Burger
Download or read book Effects of the Nestucca Oil Spill on Seabirds Along the Coast of Vancouver Island in 1989 written by Alan E. Burger and published by Delta, B.C. : Canadian Wildlife Service. This book was released on 1993 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: On 23 December 1988, the oil barge Nestucca was damaged off Gray's Harbour, Washington and began leaking, spilling about 875,000 litres of Bunker C oil that drifted northwards, leading to widespread oiling of beaches along the coasts of Washington and Vancouver Island and the heavy mortality of seabirds. This report documents the impact of the Nestucca spill on seabirds based on the data collected from British Columbia. The report documented the numbers, types, degree of oiling, and state of decomposition of the birds recovered on Vancouver Island; compared the species composition of the oiled birds with that of offshore and inshore populations wintering off southwest Vancouver Island; estimated the total number of oiled birds to land on Vancouver Island, taking into account the large numbers of carcasses not tallied; estimated the total at-sea mortality represented by the birds recovered on Vancouver Island, taking into account the losses of carcasses at sea; compared the Nestucca victims with normal seabird mortality off Vancouver Island; and assessed the impact of the spill on predatory and scavenging birds on Vancouver Island.
Author :Ian Stirling Publisher :Fisheries and Environment Canada : [available from] Minister of Supply and Services ISBN 13 :9780662010388 Total Pages :64 pages Book Rating :4.0/5 (13 download)
Book Synopsis The Ecology of the Polar Bear (Ursus Maritimus) Along the Western Coast of Hudson Bay by : Ian Stirling
Download or read book The Ecology of the Polar Bear (Ursus Maritimus) Along the Western Coast of Hudson Bay written by Ian Stirling and published by Fisheries and Environment Canada : [available from] Minister of Supply and Services. This book was released on 1977 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
