Download or read book Les petites oies blanches de l est de l Arctique canadien written by Hugh Boyd and published by Service canadien de la faune. This book was released on 1982 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Un mod le pour la simulation de la population des Grandes Oies blanches written by J.. Gauvin and published by Ministre de l'Environnement, Service canadien de la faune. This book was released on 1987 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colonies and Numbers of Ross Geese and Lesser Snow Geese in the Queen Maud Gulf Migratory Bird Sanctuary written by R. H. Kerbes and published by . This book was released on 1994 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author used large-format aerial photography combined with ground-truth surveys to estimate the total numbers of Ross' Geese and Lesser Snow Geese nesting in June in the Queen Maud Gulf Migratory Bird Sanctuary in the central Canadian Arctic.
Download or read book Wintering Populations of Lesser Snow Geese and Ross Geese in the Northern Highlands of Mexico 1988 1990 written by Bruce Calvert Turner and published by Environment Canada, Canadian Wildlife Service. This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Northern Highlands of Mexico is an increasingly important wintering area for populations of Lesser Snow Geese and Ross" Geese that nest in the Western and Central Canadian Arctic. In Mexico, the growing importance of the Northern Highlands as a wintering area for Ross" Geese and the western Central Flyway population of Lesser Snow Geese underscored the need to conduct field observations in that area and prompted the development of a joint effort involving the Mexican Secretaria de Desarrolla Social, the U.S. Fish and Wildlife Service, and the Canadian Wildlife Service. Some of the objectives were: estimate the number of white geese on the principal wintering areas in the states of Durango and Chihuahua, determine the breeding ground origin of Lesser Snow Goose stocks overwinterin in Mexico, determint ehe incidence and number of Ross' Geese among flocks of white geese, assess the quality and security of white goose wintering habitat, and identify wetland habitats of critical importance to waterfowl.
Download or read book Colonies de Petites Oies blanches dans la r gion du lac Pelly Territoires du Nord Ouest written by Service canadien de la faune and published by . This book was released on 1988 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Declines in Canadian Amphibian Populations written by Christine Annette Bishop and published by . This book was released on 1992 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1991, a workshop was held to examine the data related to declines in Canadian amphibian populations and associated causes and, in particular, to develop a protocol to address the issue. Participants were invited to present reports on the current status of knowledge on amphibians in Canada, particularly species that appear to be threatened. Summaries of this information are presented in this report, along with the factors that may be contributing to fluctuations in amphibian populations. Methodologies and tribulations involved in accurately assessing amphibian population size and recruitment are given. A framework for environmental monitoring was presented and the data needed, both intensive and extensive, was discussed.
Download or read book Occasional Paper written by and published by . This book was released on 1982 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Occasional Paper Canadian Wildlife Service written by Canadian Wildlife Service and published by . This book was released on 1999 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction Indirecte Entre L oie Des Neiges Et Le B casseau Semipalm Sur Leurs Aires de Nidification Dans L arctique Canadien written by Sarah Jacques and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Les activités humaines affectent les écosystèmes naturels de multiples façons à une échelle planétaire. Un des impacts majeurs de telles activités anthropiques est le déclin généralisé de la biodiversité à une échelle globale. Il est critique de prendre en compte les interactions trophiques dans un contexte de conservation d'espèces menacées ou en déclin. En effet, les interactions indirectes négatives sont la forme d'interaction indirecte la plus commune en nature et elles pourraient mener à l'extinction de certaines espèces de proies. Cependant, les interactions indirectes sont rarement prises en compte dans les explications du déclin et de la perte d'espèces. Au cours des dernières années, les oiseaux de rivage ont montré des signes dramatiques de déclin de population à l'échelle mondiale et nord-américaine. Simultanément, les populations d'oies des neiges ont augmenté exponentiellement en raison de l'augmentation de la disponibilité des ressources alimentaires d'origine humaine provenant de terres agricoles en région tempéré. La présence croissante d'oies des neiges a été mise en évidence comme facteur pouvant contribuer au déclin des oiseaux de rivage nichant en Arctique. Les colonies d'oies des neiges peuvent provoquer un effet d'agrégation des renards arctiques dans les habitats où se reproduisent les oiseaux de rivage. Une plus grande abondance de prédateurs pourrait entraîner un risque de prédation plus élevé sur les nids d'oiseaux de rivage via la compétition apparente. L'évaluation de l'hypothèse de compétition apparente comme cause potentiel du déclin des oiseaux de rivage nichant en Arctique est actuellement limitée par le manque de données empiriques. Pour cette raison, nous avons utilisé des outils de modélisation pour répondre à cette hypothèse et pour déterminer la plausibilité de l'hypothèse de compétition apparente pour expliquer le déclin des oiseaux de rivage en se concentrant sur deux objectifs principaux. Mots clés : Proie alternative, compétition apparente, Arctique, conservation, oies, modèle mathématique, bécasseau semipalmé, oiseaux derivage." -- Extrait du résumé.
Download or read book Winter Distributions of Thick billed Murres from the Eastern Canadian Arctic and Western Greenland in Relation to Age and Time of Year written by Canada. Environment Canada and published by Minister of Public Works and Government Services. This book was released on 1957 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colonies de petites oies blanches dans la r gion du lac Pelly Territoires du Nord Ouest en 1988 written by Kevin J. McCormick and published by . This book was released on 1989 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution Survival and Numbers of Lesser Snow Geese of the Western Canadian Arctic and Wrangel Island Russia written by R. H. Kerbes and published by . This book was released on 1999 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Razorbill Alca torda is one of the rarest breeding auks in North America. A number of surveys have been conducted at breeding colonies in recent years to estimate population size and trends. Summarizing the available data, we estimate that approximately 38 000 pairs of Razorbills currently breed in eastern North America. The largest concentrations of Razorbills breed on the Quebec North Shore and in coastal southern Labrador; smaller numbers breed in the Quebec portion of the gulf and estuary of the St. Lawrence River, Maine, New Brunswick, Nova Scotia, Newfoundland, and St. Pierre and Miquelon. "--Abstract.
Download or read book Le Naturaliste canadien written by Léon Provancher and published by . This book was released on 1959 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relev s d oies de bernaches et de cygnes dans la r gion d sign e des Inuvialuit ouest de l Arctique canadien 1989 2001 ressource lectronique written by Hines, James Edward and published by Service canadien de la faune. This book was released on 2006 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colonies de petites oies blanches dans la r gion du lac Pelly Territoires du Nord Ouest written by Kevin J.. McCormick and published by . This book was released on 1988 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relev s d oies de bernaches et de cygnes dans la r gion d sign e des Inuvialuits ouest de l Arctique canadien 1989 2001 written by James Edward Hines and published by . This book was released on 2006-01-01 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Une série de relevés d'oies, de bernaches et de cygnes a été menée dans la région entre 1989 et 2001 dans le but d'établir des estimations appropriées des populations actuelles qui serviront de point de comparaison dans l'avenir et permettront de gérer des récoltes viables à long terme. Les relevés enrichissent considérablement nos connaissances sur la répartition, l'abondance et la productivité des oies, des bernaches et des cygnes dans l'ouest de l'Arctique canadien. Les résultats sont interprétés à la lumière de ce que nous savons sur la situation de ces populations, de même que sur les prises d'oiseaux et sur la diversité des pressions environnementales auxquelles ces populations sont soumises, tant dans la région désignée des Inuvialuits qu'ailleurs en Amérique du Nord.
