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Author : Anthony J. Erskine
Publisher : Unknown
Page : 61 pages
File Size : 45,6 Mb
Release : 1970
Category : Electronic
ISBN : OCLC:1131427697
Author : Anthony J. Erskine
Publisher : Fisheries and Environment Canada ; Ottawa : Available from, Printing and Publishing, Supply and Services Canada
Page : 72 pages
File Size : 50,5 Mb
Release : 1978
Category : Nature
ISBN : CORNELL:31924090312848
1966-75 activities of the Breeding Bird Survey to detect and measure year-to-year and long-term changes in population of birds, particularly the smaller land birds.
Author : Brian B. Wilks
Publisher : University of Toronto Press
Page : 664 pages
File Size : 55,6 Mb
Release : 2004-01-01
Category : Science
ISBN : 0802088112
Wilks provides a historical background, list of publications, and description of activities for most of the major science initiatives undertaken at the federal level. He surveys a wide range of government documents and monographic and serial science collections used by both faculty and students.
Author : Anonim
Publisher : Unknown
Page : 216 pages
File Size : 53,5 Mb
Release : 1986
Category : Animals
ISBN : IND:30000118417835
Author : John R. Sauer,Sam Droege
Publisher : Unknown
Page : 184 pages
File Size : 53,5 Mb
Release : 1990
Category : Bird populations
ISBN : PURD:32754060692278
Author : D.M. Power
Publisher : Springer Science & Business Media
Page : 291 pages
File Size : 55,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461518358
In Volume 12, eminent international ornithologists further elucidate endocrinological correlates of mating strategies and hormones and reproductive behavior; assess the value of the ''brood reduction hypothesis'' in explaining ''the paradox of hatching asynchrony''; and explore the validity and sensitivity of growth bands in feathers as an indication of nutritional condition and the use of feather banding in studying growth. Chapters are well supported with charts, maps, schematic diagrams, and photographs. Current Ornithology is the only English-language publication currently devoted exclusively to extensive reviews and synthesis of topics pertaining to all aspects of the biology of birds. Chapters fall under such diverse rubrics as ecology, evolution, behavior, phylogeny, behavioral ecology, anatomy and physiology, and conservation biology. All authors are leading authorities on their subjects, and each chapter is refereed by experts in the topics covered. Although all chapters focus primarily on birds, some topics, such as the social cognition of birds as compared to primates (Volume 13), have significant application to disciplines outside of ornithology. Current Ornithology aims to provide an accessible, up-to-date, accurate source of data and to contribute to conceptual generalization and unification across the biological sciences.
Author : J. Alexander Burnett
Publisher : UBC Press
Page : 345 pages
File Size : 53,6 Mb
Release : 2011-11-01
Category : Business & Economics
ISBN : 9780774842525
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.
Author : Anonim
Publisher : Unknown
Page : 506 pages
File Size : 48,9 Mb
Release : 1979
Category : Fishes
ISBN : OSU:32435021223789
Author : U.S. Fish and Wildlife Service
Publisher : Unknown
Page : 76 pages
File Size : 49,5 Mb
Release : 1982
Category : Fishes
ISBN : MINN:30000010644247
Author : Richard A. Dolbeer,Robert A. Stehn
Publisher : Unknown
Page : 108 pages
File Size : 48,9 Mb
Release : 1978
Category : Bird populations
ISBN : UOM:39015095044031
We used the North American Breeding Bird Survey to estimate trends of red-winged blackbirds (Agelaius phoeniceus), common grackles (Quiscalus quiscula), brown-headed cowbirds (Molothrus ater), and starlings (Sturnus vulgaris) for 1966-76 in the United States and Canada. Extended to a continental scale, the survey indicated significant increases in the mean number of redwings, cowbirds, and starlings observed per route. Starlings had the greatest increase, 4.96 birds per route or a 19.4% increase. The starlings' greatest regional increases occurred in the western United States. Populations of redwings increased most in the St. Lawrence Valley and parts of the Midwest and Lower Plains regions. Cowbirds increased the most in the plains from Iowa to Saskatchewan and decreased over parts of the eastern and midwestern United States. Grackle populations indicated no change on a continental scale but did show strong increases in the Midwest and Lower Plains regions and declines in Appalachia. This knowledge of blackbird and starling population trends in specific areas should improve our ability to understand increasing bird-man conflicts, to evaluate proposed bird-damage control strategies, and to develop more effective, long-term solutions than are available at present.
Author : Thomas J. Dwyer,Richard A. Coon,Paul H. Geissler
Publisher : Unknown
Page : 438 pages
File Size : 55,6 Mb
Release : 1979
Category : Scolopacidae
ISBN : UCSD:31822009785221
Author : Anonim
Publisher : Unknown
Page : 768 pages
File Size : 41,9 Mb
Release : 1990
Category : Electronic
ISBN : WISC:89037101656
Author : Canadian Wildlife Service
Publisher : Environment Canada, Canadian Wildlife Service
Page : 15 pages
File Size : 41,8 Mb
Release : 1990
Category : Electronic
ISBN : 0662175034
Author : Anonim
Publisher : Unknown
Page : 420 pages
File Size : 51,8 Mb
Release : 2007
Category : Electronic
ISBN : NWU:35556034519488
Author : Sharon A. Mikol
Publisher : Unknown
Page : 38 pages
File Size : 44,8 Mb
Release : 1980
Category : Bird populations
ISBN : UOM:39015086413138
