Download or read book Effects of Weather on Caribou Forage Productivity and Nutrition Within the Range of the Chisana Herd written by Elizabeth A. Lenart and published by . This book was released on 1997 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Weather on Caribou Forages Productivity and Nutrition Within the Range of the Chisana Herd Grant W 24 3 W 24 4 written by Elizabeth A. Lenart and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Weather on Caribou Forages Productivity and Nutrition Within the Range of the Chisana Herd written by Elizabeth A. Lenart and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Weather on Caribou Forages Productivity and Nutrition Within the Range of the Chisana Herd written by Elizabeth A. Lenart and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Weather on Caribou Forages Productivity and Nutrition Within the Range of the Chisana Herd Research final report Grants W 24 3 W 24 4 W 24 5 written by Elizabeth A. Lenart and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Regulating and Limiting Factors in the Delta Caribou Herd written by and published by . This book was released on 1999 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Climate and Caribou written by Elizabeth A. Lenart and published by . This book was released on 1997 with total page 152 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 2002 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Remotely sensed Changes in the Primary Productivity of Migratory Caribou Calving Grounds and Summer Pasture written by Allen Campeau and published by . This book was released on 2016 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis used remote sensing to examine how changes in caribou abundance can impact forage availability, and how these changes might in turn affect the population dynamics and space use patterns of migratory caribou. We investigated these relationships for the Rivière-George caribou herd (RGH) and its calving grounds and summer range in Northern Quebec and Labrador (Canada) from 1991-2011. We modelled the relationships between primary productivity and various climatic variables, allowing us to isolate the effects of non-climatic factors, such as caribou herbivory, on primary productivity. We found a negative relationship between caribou density and primary productivity at the range-scale, suggesting that caribou herbivory can reduce forage abundance and contribute to habitat degradation. However, a strong warming trend over the study period, coupled with a decline in RGH population size, meant that we observed a trend towards higher primary productivity. This greening trend may represent vegetation recovery following the reduction in caribou herbivory and/or an effect of climate warming.

Download or read book Fish and Wildlife Reference Service Newsletter written by and published by . This book was released on 1997 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Zoological Record written by and published by . This book was released on with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Reduction of Wolves in the Yukon written by Robert D. Hayes and published by . This book was released on 2003 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: "We conducted a large-scale, controlled experiment to study the responses of declining woodland caribou (Rangifer tarandus), moose (Alces alces), and Dall sheep (Ovis dalli) to a 5-year reduction in wolf (Canis lupus) numbers in the Aishihik area in the southwestern Yukon"--Page 1

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 Migratory Caribou US and Canada Conservation written by and published by . This book was released on 1980 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Return of Caribou to Ungava written by A. T. Bergerud and published by McGill-Queen's Press - MQUP. This book was released on 2007-12-19 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: The George River caribou herd increased from 15,000 animals in 1958 to 700,000 in 1988 - the largest herd in the world at the time. The authors trace the fluctuations in this caribou population back to the 1700s, detail how the herd escaped extinction in the 1950s, and consider current environmental threats to its survival. In an examination of the life history and population biology of the herd, The Return of Caribou to Ungava offers a synthesis of the basic biological traits of the caribou, a new hypothesis about why they migrate, and a comparison to herd populations in North America, Scandinavia, and Russia. The authors conclude that the old maxim, "Nobody knows the way of the caribou," is no longer valid. Based on a study in which the caribou were tracked by satellite across Ungava, they find that caribou are able to navigate, even in unfamiliar habitats, and to return to their calving ground, movement that is central to the caribou's cyclical migration. The Return of Caribou to Ungava also examines whether the herd can adapt to global warming and other changing environmental realities.

Download or read book Distribution Abundance and Quality of Forage Within the Summer Range of the Central Arctic Caribou Herd written by Michael D. Smith and published by . This book was released on 1996 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potential Effects of Global Warming on Calving Caribou written by Warren G. Eastland and published by . This book was released on 1992 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calving grounds of barren-ground caribou (Rangifer tarandus) are often in the portion of their range that remains covered by snow late into spring. We propose that global warming would alter the duration of snow cover on the calving grounds and the rate of snowmelt, and thus affect caribou population dynamics. The rationale for this hypothesis is based upon the following arguments. For females of the Porcupine Herd, one of the few forages available before and during early calving are the inflorescences of cotton grass (Eriophorum vaginatum), which are very digestible, high in nitrogen and phosphorus, and low in phenols and acid-detergent fiber. The nutritional levels of the inflorescences are highest in the early stages of phenology and decline rapidly until they are lowest at seed set, about 2 weeks after being exposed from snow cover. The high nutritional level of cotton grass inflorescences is important to post-paturient caribou attempting to meet nutritional requirements of lactation while minimizing associated weight loss. The pattern of weight regain in summer is important to herd productivity as female body weight at mating influences conception in late summer and calving success in spring. Therefore, temporal changes in snowmelt may have major effects on nutritional regimes of the female.