COSEWIC Status Appraisal Summary on the Northern Bobwhite, Colinus Virginianus, in Canada PDF Download
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Author: Sue Chiblow
Publisher:
ISBN: 9781100224923
Category : Northern bobwhite
Languages : en
Pages : 13
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Book Description
Author: Sue Chiblow
Publisher:
ISBN: 9781100224923
Category : Northern bobwhite
Languages : en
Pages : 13
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Book Description
Author: Robert Newton O'Boyle
Publisher:
ISBN: 9781100221434
Category : Brosme brosme
Languages : en
Pages : 85
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Book Description
Author: John L. Roseberry
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 312
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Book Description
This book presents the results and conclusions of the longest continuous study ever undertaken for a local North American game bird population. Since 1950 abundance has been determined seasonally by direct count, nesting ecology by field searches and observation, and hunting pressure and harvest by field interviews. Land use and weather conditions also have been recorded. The period of the study saw considerable change in regional land use and included several of the most severe winters in recorded weather history. Continuing harvest of the study population did not have a progressively depressing effect on standing densities; rather it held breeding stock somewhat below K at a more productive point on the growth curve. Roseberry and Klimstra report that there was clear evidence of an 8 to 10-year cycle within the study population. They found after examining a number of cycle theories that a close temporal relationship existed between their bobwhite data and the nodal lunar cycle described by Archibald (1977). Sound field techniques, long-term data acquisition, and appropriate mathematical and statistical treatment of the data combine to provide a significant contribution to what is known of not only bobwhite but basic population ecology.
Author: Bonnie L. Henson
Publisher:
ISBN:
Category : Biodiversity conservation
Languages : en
Pages : 366
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Book Description
Author: Val William Lehmann
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 410
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Book Description
Author: Susan E. Goodman
Publisher: Millbrook Press
ISBN: 0822567482
Category : Juvenile Nonfiction
Languages : en
Pages : 52
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Book Description
Describes efforts by scientists to reestablish a whooping crane flock that would spend summers in Wisconsin and winters in Florida.
Author:
Publisher:
ISBN: 9780660068640
Category : Biological assay
Languages : en
Pages : 176
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Book Description
"The intent of this document is to provide guidance on preparing for and conducting single-species tests to measure and evaluate the pathogenicity and/or toxicity of new microbial substances to aquatic and terrestrial organisms. It focuses on the information requirements with respect to laboratory tests for measuring the potential ecological effects of new microbial substances on the following six categories of test (host) organisms, that might be required by Environment and Climate Change Canada as part of the New Substances Notification (NSN) Regulations under the Canadian Environmental Protection Act, 1999: (1) an aquatic plant; (2) an aquatic invertebrate; (3) an aquatic vertebrate; (4) a terrestrial plant; (5) a terrestrial invertebrate; and (6) a terrestrial vertebrate. The guidance herein is intended for notifiers, environmental consultants, study directors, and principal investigators. It will assist in the selection of an appropriate series of biological test methods for measuring the pathogenicity and/or toxicity of new microbial substances, as well as in the planning, execution, and reporting phases associated with each test. Changes introduced in this second edition of the guidance have primarily come from microbial substance testing experience in Environment and Climate Change Canada research laboratories and improvements in test methodologies over the past decade"--Abstract, p. ii.
Author:
Publisher: Nature Alberta
ISBN: 9780969613497
Category : Nature
Languages : en
Pages : 648
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Book Description
Author: Les Benedict
Publisher:
ISBN: 9781896392585
Category : Black ash
Languages : en
Pages : 78
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Book Description
Author: Mark B. Bain
Publisher:
ISBN:
Category : Aquatic habitats
Languages : en
Pages : 234
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Book Description
Abstract: Habitat is now the basis of most impact assessments and resource inventories, and it is the basis of many species management plans, mitigation planning, and environmental regulation. Habitats are relatively stable through time, easily defined in intuitive physical terms, and provide a tangible resource for negotiations and decision making. Numerous and varied methods of analyzing and reporting habitat conditions have been developed by federal, state, provincial, and private agencies. Habitat assessment approaches vary greatly among regions of the continent. The great variability in methods and an unusually wide range of practices have impeded the ability of agencies to share and synthesize information. A diversity of methods is desirable in the initial stages of a rapidly developing field, but enough time has passed to assess the state-of-knowledge and identify the best of the currently used methods and techniques. This manual is intended to provide fisheries biologists with a limited set of techniques for obtaining aquatic habitat data. The manual also describes the range of information collected and used in agency habitat analyses. Agencies planning habitat programs should review the synthesis of established and documented methods being used in North America (Appendix 1) and the planning recommendations in Chapter 2. Then, the remaining chapters should be reviewed to determine what types of habitat data should be included in the agency's program.
