Some Aspects of the Ecology of the Porcupine Caribou Herd PDF Download
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Author: E. A. de Bock
Publisher:
ISBN:
Category : Caribou
Languages : en
Pages : 296
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Book Description
Author: E. A. de Bock
Publisher:
ISBN:
Category : Caribou
Languages : en
Pages : 296
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Book Description
Author: Donald Edmund Russell
Publisher:
ISBN:
Category : Barren ground caribou
Languages : en
Pages : 14
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Book Description
Author: Don E. Russell
Publisher:
ISBN:
Category : Caribou
Languages : en
Pages : 168
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Book Description
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.
Author: Donald Edmund Russell
Publisher:
ISBN:
Category : Caribou
Languages : en
Pages : 165
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"The primary objective of this study was to define and identify critical caribou habitat in northern Yukon (ie. north of treeline) in order to better predict impact of any human activity on caribou. A comprehensive ecological approach was used to first of all define "critical" habitat. Caribou movement and behavior was related to the "need to feed" and the "need to avoid insects". 1. Historical and recent movements and distribution of the herd pointed to the importance of the Richardson Mountains and the Muskeg Basin regions of the northern Yukon during summer insect season. Radio-tracking relocations pointed to the frequent fracturing and reformation of large aggregations during the insect season and the constant movement of these groups. 2. Our assessment of the regional distribution of vegetation communities has shown that the Blow River valley and the valleys of the Richardson Mountains support lush vegetation. ...3. Our study of mosquito activity ... showed that mosquito activity peaks the second week of July and declines thereafter, .... 4. Our documentation of regional weather in 1986 revealed the regional influence of warm, moist northeasterly flows from interior Alaska and the cool southwesterly flows from the Beaufort Sea. Our study appeared to lie within the area of conflict between these two systems, resulting in dynamic weather patterns that can and are exploited by the caribou. ... 5. Our study of caribou behaviour response to insect harassment revealed the importance of defense strategies such as forming large dense groups when insects are active, and the advantage gained by individuals in the core or windward side of a group. 6. Caribou activity budgets indicated that insect harassment had the most profound effect of reducing lying and feeding at the expense of standing. ... The study provides the baseline information on the use of the region by the Porcupine caribou herd during the summer period, and combined with our knowedge of caribou/human interactions from related studies, puts us in an excellent position to help guide industrial development. ... The study provides the baseline informaion on the use of the region by the Porcupine caribou herd during the summer period, and combined with our knowledge of caribou/human interactions from related studies, puts us in an excellent position to help guide industrial development"--ASTIS [online] database.
Author: United States. Bureau of Land Management
Publisher:
ISBN:
Category : Natural gas
Languages : en
Pages : 530
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Author: Renewable Resources Consulting Services
Publisher:
ISBN:
Category : Barren ground caribou
Languages : en
Pages : 128
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Book Description
Author: Don Russell
Publisher:
ISBN:
Category : Caribou
Languages : en
Pages : 546
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Author:
Publisher:
ISBN:
Category : Antlers
Languages : en
Pages : 0
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Author: Kenneth R. Whitten
Publisher:
ISBN:
Category : Caribou
Languages : en
Pages : 54
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Book Description
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.
Author: Lincoln Scott Parrett
Publisher:
ISBN:
Category : Grant's caribou
Languages : en
Pages : 298
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Book Description
"The summer range of the Teshekpuk Caribou (Rangifer tarandus granti) Herd is currently undergoing the initial stages of petroleum exploration and development. Pre-development baseline information is necessary to interpret post-development distribution and habitat selection of caribou and to develop mitigation measures. We estimated bi-weekly distributions, diet and habitat selection by caribou during the summers, 2002-2004, based on aerial relocations of 21-49 radio-collared females. Little or no habitat selection was detected when comparing used locations to habitat available within bi-weekly utilization distributions. Habitat selection was much stronger when comparing bi-weekly utilization distributions to the remaining area of summer use. At the latter scale of analysis, there were dynamic temporal patterns in resource selection by caribou. High air temperature was strongly avoided throughout July. Tussock tundra was avoided early in the summer, but selected during August. Wet sedge was selected in June and from late-August through September. Estimates of dietary nitrogen content indicated that high nitrogen concentrations are available only for a short period in early summer, and declined well before forage biomass. Predicted dietary nitrogen concentration appeared to be much lower for the Teshekpuk Caribou Herd than for the Porcupine Caribou Herd. Successful mitigation measures for petroleum development in NPR-A will need to be spatially and temporally tailored to observed dynamic patterns in caribou resource selection. Future work should estimate the performance of caribou (e.g., survival or weight gain) in relation to habitat quality and use in order to confirm the value of selected habitats and to enhance the robustness of mitigation measures"--Leaf iii.
