Download or read book Summer Range Relationships of the Porcupine Caribou Herd 1985 written by Donald Edmund Russell and published by . This book was released on 1986 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study focuses on the summer range relations of the Porcupine caribou herd with particular attention to the behavioral responses of barren-ground caribou (Rangifer tarandus granti) as groups and individuals to blood-seeking and parasitic dipterans. Between mid-June and mid-August, caribou in the northern Yukon are periodically harassed by dipterans. The period of dipteran activity coincides with the critical time when caribou are restoring fat reserves depleted during winter, growing new hair and antlers, and lactating cows are producing milk for calves. Caribou experience physical irritation and blood loss to mosquitoes which emerge in late June and are active until early August. When mosquitoes are bothersome, caribou show signs of irritation by shaking their head, back, rump, or stomping their feet (Thompson, 1977). Adult warble flies (Hypoderma tarandu and nasal bot flies (Cephenamya trompe), collectively know as oestrids, do not inflict pain but their presence cause caribou to exhibit a number of "annoyance responses" (Espmark, 1967). The larvae of oestrids are obligate parasites of R. tarandus and have direct and indirect effects on their hosts. a. Direct costs: mosquitoes - loss of blood; Oestrids - increased load of endoparasites feeding on lymph, possible allergic response, suppression of immune response (Dietrich, 1981). b. Indirect costs: The indirect effect of avoiding dipterans may include reduced feeding, resting or rumination time, decrease efficiency of grazing ie. feeding less selectively or feeding in less most favorable habitat. The behavioral responses to dipterans, as well as selection of habitat with few dipterans, may have evolved in response to the direct and indirect energy cost associated with encountering blood-seeking and parasitic dipterans"--Leaf 1.
Download or read book Summer Range Relationships of the Porcupine Caribou Herd 1986 written by Donald Edmund Russell and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report briefly summarizes the results of the third summer field season, designed to provide baseline information for the potential development of Beaufort Sea oil and gas reserves. In the initial two field seasons, research focussed on documenting the distribution, movement patterns and habitat selection of the herd during insect season. As well, the role of insect harassment in influencing activity patterns and overt behaviour was documented in detail. In this third field season our objectives were to document the biophysical factors that influenced the patterns observed in the previous field seasons. Our objective was to construct a vegetation map for the study area using classification system that was particularly meaningful for caribou. In addition, we documented regional weather patterns, in an attempt to relate regional patterns to potential insect harassment levels. We also documented caribou movement and distribution in July and early August"--Leaf 2.
Download or read book Porcupine Caribou Herd 1985 86 written by Doug Urquhart and published by . This book was released on 1989 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Movement Patterns of the Porcupine Caribou Herd in Relation to Oil Development written by Kenneth R. Whitten and published by . This book was released on 1993 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study synthesizing existing knowledge on migration routes between seasonal ranges, selection of claving areas on the arctic coastal plain, selection of winter ranges, and long-term natality and mortality rates of radio-collared caribou (Rangifer tarandus) in the PCH (Porcupine caribou herd) in northern Alaska (Arctic National Wildlife Refuge), Yukon and the Northwest Territories.
Download or read book Summer Ecology of the Porcupine Caribou Herd written by Donald Edmund Russell and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Fourth International Reindeer Caribou Symposium written by and published by . This book was released on 1986 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Range Ecology of the Porcupine Caribou Herd in Canada written by Don E. Russell and published by . This book was released on 1993 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report of a study (1979-1987) on the range ecology of the Porcupine Caribou Herd of Grant's caribou (Rangifer tarandus-granti)that migrates annually from summer range on the arctic coastal plain of Alaska and Yukon to winter in the forested valleys and plains of north-central Yukon and western Alaska. The study was undertaken by the Yukon Dept. of Renewable Resources and the Canadian Wildlife Service because of concern about proposed developments within the range of the caribou.
Download or read book Movement Patterns of the Porcupine Caribou Herd in Relation to Oil Development W 23 1 written by Wayne Louis Regelin and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Movement Patterns of the Porcupine Caribou Herd in Relation to Oil Development Progress report Project W 22 5 written by Wayne Louis Regelin and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic National Wildlife Refuge written by United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries and Wildlife Conservation and the Environment and published by . This book was released on 1991 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2003 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remote Sensing of Biomass written by Lola Fatoyinbo and published by BoD – Books on Demand. This book was released on 2012-03-28 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: The accurate measurement of ecosystem biomass is of great importance in scientific, resource management and energy sectors. In particular, biomass is a direct measurement of carbon storage within an ecosystem and of great importance for carbon cycle science and carbon emission mitigation. Remote Sensing is the most accurate tool for global biomass measurements because of the ability to measure large areas. Current biomass estimates are derived primarily from ground-based samples, as compiled and reported in inventories and ecosystem samples. By using remote sensing technologies, we are able to scale up the sample values and supply wall to wall mapping of biomass. Three separate remote sensing technologies are available today to measure ecosystem biomass: passive optical, radar, and lidar. There are many measurement methodologies that range from the application driven to the most technologically cutting-edge. The goal of this book is to address the newest developments in biomass measurements, sensor development, field measurements and modeling. The chapters in this book are separated into five main sections.
Download or read book Arctic Research of the United States written by and published by . This book was released on 1987 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology Abstracts written by and published by . This book was released on 1993 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of 6th North American Caribou Workshop written by and published by . This book was released on 1996 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Productivity of the Central Arctic Caribou Herd in Relationship to Petroleum Development written by Raymond D. Cameron and published by . This book was released on 1989 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Science Report written by and published by . This book was released on 1995 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
