Download or read book Habitat Selection by Calving Caribou of the Central Arctic Herd 1980 95 written by Scott Adrian Wolfe and published by . This book was released on 2000 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Habitat selection by calving caribou (Rangifer tarandus granti) of the Central Arctic Herd, Alaska, was assessed in relation to distance from roads, vegetation type, relative plant biomass (NDVI; Normalized Difference Vegetation Index), accumulation of plant biomass during early lactation (NDVIrate), snow cover, and terrain ruggedness. From 183 calving sites of 96 radio collared- females, 1980-95, calving distribution was estimated in reference (no development) and treatment (oilfields present) zones east and west of the Sagavanirktok River, respectively. In the reference zone, caribou regularly selected wet-graminoid vegetation, above-median NDVIrate, and non-rugged terrain; concentrated calving remained in habitats with zonal average NDVI on 21 June (NDVI621). In the treatment zone, selection patterns were inconsistent; concentrated calving shifted inland to rugged terrainwith low NDVI621 and away from development. Repeated use of lower-quality habitats in the treatment zone could compromise nutrient intake by calving females, thereby depressing reproductive success of the western-segment of the herd"--Leaf iv.

Download or read book Calving Ground Habitat Selection written by Rebecca A. Kelleyhouse and published by . This book was released on 2001 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Barren-ground caribou (Rangifer tarandus granti) exhibit relative fidelity to calving grounds each spring. The Western Arctic Herd (WAH) and Teshekpuk Lake Herd (TLH) calve separately on Alaska's north slope, each selective of the dominant vegetation type. The WAH consumed mostly sedges, though the TLH diet varied. Despite differing snow conditions between the calving grounds, both herds were selective of the lowest snow cover class. Rugged terrain was avoided by both herds. While the TLH selected a high rate of increase in biomass, the WAH selected high biomass at calving and at peak lactation. Climate trends (1985-2001) were variable. There was a warming trend on the WAH calving ground, though no significant trends were present on the TLH calving ground, as expressed by median NDVI on 21 June. These herds have similar winter ranges and population trends, yet they differ in respect to habitat composition, selection and climate patterns during calving"--Leave iv.

Download or read book Arctic National Wildlife Refuge written by Mary Lynne Corn and published by Nova Publishers. This book was released on 2003 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rich biological resources and wilderness values of north-eastern Alaska have been widely known for about 50 years, and the rich energy resource potential for much of that time. The future of these resources has been debated in Congress for over 40 years. The issue for now is whether to open a portion of what is now the Arctic National Wildlife Refuge (ANWR) to allow the development of potentially the richest on-shore source of oil remaining in the United States, and if so under what restrictions. The coastal northern plain of the Refuge is the focus of the debate. This remote and largely untouched area is an example of an arctic ecosystem that, by virtue of being essentially intact, is increasingly rare. It has been called 'America's Serengeti', for vast herds of caribou, for the many nesting and feeding migratory birds, and for its predators such as grizzly bears, polar bears, wolves and golden eagles. The area also has immensely promising oil prospects, which some feel could be as productive as Prudhoe Bay. It is heralded as a place which could help reduce national dependence on foreign oil and keep the Alaskan oil pipeline in use for decades. Advocates for development foresee benefits to the oil industry, the people of Alaska, and the national economy. This book provides basic material for analysing possibilities and implications of the major issues that have been the focus of the debate over its fate.

Download or read book Home Range Use Social Structure and Habitat Selection of the Western Arctic Caribou Herd written by James L. Davis and published by . This book was released on 1982 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Northwest National Petroleum Reserve Alaska written by and published by . This book was released on 2003 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cumulative Environmental Effects of Oil and Gas Activities on Alaska s North Slope written by National Research Council and published by National Academies Press. This book was released on 2003-10-04 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book identifies accumulated environmental, social and economic effects of oil and gas leasing, exploration, and production on Alaska's North Slope. Economic benefits to the region have been accompanied by effects of the roads, infrastructure and activies of oil and gas production on the terrain, plants, animals and peoples of the North Slope. While attempts by the oil industry and regulatory agencies have reduced many of the environmental effects, they have not been eliminated. The book makes recommendations for further environmental research related to environmental effects.

Download or read book Kobuk Seward Peninsula Resource Management Plan and Environmental Impact Statement written by and published by . This book was released on 2006 with total page 408 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:

Download or read book Kobuk Seward Peninsula Resource Management Plan written by and published by . This book was released on 2006 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Daily Heterogeneity in Habitat Selection by the Porcupine Caribou Herd During Calving written by Rachel Rands Jones and published by . This book was released on 2005 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Caribou exhibit scale-dependent habitat selection, but variance in daily habitat selection by the Porcupine Caribou Herd (PCH) has not been examined. Investigating temporal variance in habitat selection may clarify the time period when managers may accurately estimate calving-related habitat selection. Annually, 1992-1994, approximately 70 calves were radio-collared within 2 days of birth and relocated daily until departing the calving grounds. We used daily 99% fixed kernel utilization distributions (UD's) to estimate caribou distributions, then estimated daily habitat selection using logistic regression. Habitat variables included relative vegetation greenness, greening rate, landcover class, and elevation. Spatial scales of investigation included concentrated vs. peripheral use within daily UD's, daily use within the merged extent of all daily UD's, and daily use within the historical extent of calving, 1983-2001. We used linear regression of logistic regression parameter estimates on sequential sampling days to estimate temporal habitat selection trends during the 3 weeks following capture. Overall, caribou exhibited habitat selection at multiple scales, without temporal trends, suggesting that the 21-day period following capture constituted a single domain and that managers may accurately estimate calving-related habitat selection at any point during this period"--Leaf iii.

Download or read book Northeast National Petroleum Reserve Amended Integrated Activity Plan written by and published by . This book was released on 2005 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Outer Continental Shelf Oil Gas Leasing Program 2007 2012 written by and published by . This book was released on 2006 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution and Productivity of the Central Arctic Caribou Herd in Relation to Petroleum Development written by Raymond D. Cameron and published by . This book was released on 1994 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wild Mammals of North America written by George A. Feldhamer and published by JHU Press. This book was released on 2003-11-19 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents

Download or read book Differential Habitat Use and Sexual Segregation in the Central Arctic Caribou Herd written by R. D. Jakimchuk and published by . This book was released on 1987 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Caribou Distribution on the Calving Grounds of the Central Arctic Herd 1987 written by Brian Edwards Lawhead and published by . This book was released on 1988 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings 1990 National Symposium on Mining written by Donald Hubert Graves and published by O E S Publications. This book was released on 1990 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: