Download or read book Relationships between estimates of ringed seal Phoca hispida and polar bear Ursus maritimus populations in the Canadian Arctic written by I. STIRLING 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 Examining Threats and Protections for the Polar Bear written by United States. Congress. Senate. Committee on Environment and Public Works and published by . This book was released on 2014 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polar Bears written by Andrew E. Derocher and published by JHU Press. This book was released on 2012-03-08 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents an introduction to the polar bear, discussing its evolution, physical characteristics, life cycle, predatory behavior, habitat, and the threats to its existence from global warming.
Download or read book Ecology of Arctic Environments written by Sarah J. Woodin and published by Cambridge University Press. This book was released on 1997-08 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Once thought of as a pristine environment, it is now all too apparent that the Arctic is a sink for pollutants transported northwards over long distances in the atmosphere and oceans, and is also likely to be subject to major climate change as a result of global warming. Many ecologists are currently seeking to further our understanding of how arctic ecosystems function, and to detect and predict anthropogenic changes which may occur within them. This book, resulting from a British Ecological Society Special Symposium, addresses these issues.
Download or read book Ethology and Behavioral Ecology of Sea Otters and Polar Bears written by Randall W. Davis and published by Springer Nature. This book was released on 2021-07-03 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea otters and polar bears are carnivorous marine mammals that still resemble their terrestrial ancestors. Compared with Cetacea (whales and dolphins), Sirenia (dugongs and manatees), and Pinnipedia (seals, sea lions, and walrus), they are less adapted for an aquatic life and the most recently evolved among marine mammals. Sea otters are amphibious but seldom come ashore, and polar bears primarily occur on sea ice or along the shore. When at sea, both species spend most of their time swimming at the surface or making short, shallow dives when foraging or pursuing prey. Indeed, polar bears rarely pursue seals in water. Nevertheless, polar bears are powerful swimmers and will stalk seals from the water. As with many other large carnivores, they are solitary hunters. Although sea otters are gregarious and form aggregations at sea called rafts, they are primarily asocial. Except during mating, the principal interaction among sea otters occurs between a female and offspring during the six-month dependency period. In large carnivores (e.g., wolves and lions) that feed on ungulates, sociality and cooperation are favored because of the need to capture large prey and defend carcasses. Polar bears, which are the largest terrestrial carnivore, are solitary hunters of seals and are neither gregarious nor social. Males and females briefly associate during courtship and mating. During this time, males aggressively compete for females. At other times, males generally avoid each other except for aggregations of males that form while summering on land, and females with cubs avoid males, which are known for infanticide. As with sea otters, the interaction of polar bears outside of mating occurs between a female and her offspring during the 2-3 year dependency period. This interaction is critically important when altricial cubs are born in the winter den. This book provides new insight into the ethology and behavioral ecology of sea otters and polar bears. Each chapter reviews the discoveries of previous studies and integrates recent research using new techniques and technology. The authors also address historic and current anthropogenic challenges for their survival as climate change alters entire marine ecosystems.
Download or read book Marine Mammal Ecology and Conservation written by Ian L. Boyd and published by Oxford University Press. This book was released on 2010-08-12 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of our knowledge about marine mammals is derived from a long-term and dedicated research effort that is evolving rapidly due to the introduction and invention of new methods.This book reflects the inventiveness of marine researchers as they try to find ways around the problems presented to them by these unusual and challenging animals.
Download or read book Bears of the North written by Wayne Lynch and published by JHU Press. This book was released on 2021-10-05 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: An unprecedented visual and scientific journey into the secret world of bears. In Bears of the North, renowned wildlife photographer, naturalist, and bestselling author Wayne Lynch offers us a work of scintillating science and stunning beauty. Following polar bears, brown bears, and American and Asiatic black bears through the seasons, this journey is an insider's view of hibernation's mysteries and the birth of cubs in winter; the mating rituals and voracious appetites of spring; hunting, fishing, and encounters with neighbors during summer; and the feeding frenzy and exuberant play of autumn. Dispelling the stereotypes and untruths—but none of the magic—surrounding these magnificent animals, Lynch comments on the latest scientific discoveries related to the biology, behavior, and ecology of bears. He describes how satellite telemetry has revealed the purpose behind the meanderings of bears and the great distances they sometimes cover on land and in water. He also shows how DNA analysis can teach us about the relatedness of bears within a population, even revealing the identity of a particular cub's father. Taking us out into the wilds of the tundra and forests to share his firsthand observations of the marvelous bears of the Northern Hemisphere, Lynch describes their survival strategies and the threats they face from habitat fragmentation and global climate change. Lynch's fascinating narrative is enhanced by over 150 gorgeous, original color photographs that capture bears in their habitats, including appearances of the elusive moon bear, fierce polar bear battles, and rare images of mothers' intimate moments with their cubs. Informed by Lynch's nearly forty years of experience observing and photographing bears in the wild, and aided by sophisticated digital photo technologies, Bears of the North is an unrivaled collection of enthralling and informative portraits of bears in their natural environments.
Download or read book The Natural History of an Arctic Oil Field written by Joe C. Truett and published by Elsevier. This book was released on 2000-06-09 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of the harsh conditions that characterize the Arctic, it is a surprisingly fragile ecosystem. The exploration for oil in the Arctic over the past 30 years has had profound effects on the plants and animals that inhabit this frozen clime. The Natural History of an Arctic Oil Field synthesizes decades of research on these myriad impacts. Specialists with years of field experience have contributed to this volume to create the first widely available synopsis of the ecology and wildlife biology of animals and plants living in close association with an actively producing oil field. First widely available synthesis of arctic oil field ecology and wildlife biology Concise yet readable treatment of a diverse polar ecosystem Useful for land managers, policy makers as well as ecologists, and population biologists Chapters authored by recognized authorities and contributions are peer-reviewed for accuracy and scientific rigor Illustrations attractively designed to enhance comprehension
Download or read book Arctic Sea Ice Decline written by Eric T. DeWeaver and published by John Wiley & Sons. This book was released on 2013-05-28 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 180. This volume addresses the rapid decline of Arctic sea ice, placing recent sea ice decline in the context of past observations, climate model simulations and projections, and simple models of the climate sensitivity of sea ice. Highlights of the work presented here include An appraisal of the role played by wind forcing in driving the decline; A reconstruction of Arctic sea ice conditions prior to human observations, based on proxy data from sediments; A modeling approach for assessing the impact of sea ice decline on polar bears, used as input to the U.S. Fish and Wildlife Service's decision to list the polar bear as a threatened species under the Endangered Species Act; Contrasting studies on the existence of a "tipping point," beyond which Arctic sea ice decline will become (or has already become) irreversible, including an examination of the role of the small ice cap instability in global warming simulations; A significant summertime atmospheric response to sea ice reduction in an atmospheric general circulation model, suggesting a positive feedback and the potential for short-term climate prediction. The book will be of interest to researchers attempting to understand the recent behavior of Arctic sea ice, model projections of future sea ice loss, and the consequences of sea ice loss for the natural and human systems of the Arctic.
Download or read book The Global Coastal Ocean Panregional syntheses and the coasts of North and South America and Asia written by Allan R. Robinson and published by Harvard University Press. This book was released on 2006 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polar Bears written by IUCN/SSC Polar Bear Specialist Group. Working Meeting Oslo, Norway) and published by IUCN. This book was released on 1998 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1997 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alaska Outer Continental Shelf Seismic Surveys in the Beaufort and Chukchi Seas written by and published by . This book was released on 2007 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book First Ecology written by Alan Beeby and published by Oxford University Press. This book was released on 2008 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: How much do we know about the living world? Enough to predict its future? First Ecology: ecological principles and environmental issues provides a critical and evaluative introduction to the science of ecology. Alan Beeby and Anne-Maria Brennan present a succinct survey of ecology, describing and explaining the relationship between living organisms and their environment. The third edition of this popular book continues to introduce ecology from a human perspective. This view of humanity as part of the ecology of the planet makes the fundamental relevance of ecology to all life science students apparent throughout. First Ecology develops in sequence the core themes in ecology at each level of organisation - subcellular, population, ecosystem, landscape and planetary. Understanding this hierarchy - and the interplay between these levels - is crucial to the environmental decisions our species faces at the start of the twenty-first century. First Ecology is the ideal primer for you to develop this understanding. Online Resource Centre: The Online Resource Centre features the following materials: For lecturers (password protected): · A virtual field course comprising a series of basic exercises using real data helps students prepare for, and gain more from, their time in the field · Figures from the book, available to download to facilitate lecture preparation · PowerPoint slides introducing key concepts, supported with integrated figures from the book, help to save time in preparing and planning lectures · Routes help students follow and understand various themes and connections throughout the book and offer schemes for independent study · Answers to exercises provided in the book For students: · Hyperlinks to the primary literature cited in the book to facilitate access to original research papers · Routes map out how key themes are developed throughout the book . Web link library of all the URLs included in the book, together with additional web links on specific topics
Download or read book Liberty Development and Production Plan written by and published by . This book was released on 2002 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ringed Seals in the North Atlantic written by North Atlantic Marine Mammal Commission and published by Tromsø [Norway] : North Atlantic Marine Mammal Commission. This book was released on 1998 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin on the Ground written by Steven E. Churchill and published by John Wiley & Sons. This book was released on 2014-10-02 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin on the Ground: Neandertal Biology, Archeology and Ecology synthesizes the current knowledge about our sister species the Neandertals, combining data from a variety of disciplines to reach a cohesive theory behind Neandertal low population densities and relatively low rate of technological innovation. The book highlights and contrasts the differences between Neandertals and early modern humans and explores the morphological, physiological, and behavioral adaptive solutions which led to the extinction of the Neandertals and the population expansion of modern humans. Written by a world recognized expert in physical anthropology, Thin on the Ground: Neandertal Biology, Archaeology and Ecology will be a must have title for anyone interested in the rise and fall of the Neandertals.
