Download or read book Comparative Foraging Ecology and Energetics of Albatrosses written by Michelle Kappes and published by . This book was released on 2009 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Foraging Ecology of Five Species of Pacific Seabirds written by Robert M. Suryan and published by . This book was released on 2006 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seabirds are an integral component of marine ecosystems, however, because humans typically observe only snapshots of their lives at sea, our understanding of seabird foraging ecology is often limited. A more complete understanding of the ecological roles of seabirds and identification of critical foraging habitats requires the ability to follow individuals at-sea. I analyzed continuous tracking data from blacklegged kittiwakes (Rissa tridactyla) and four species of Pacific albatrosses to determine if foraging time budgets and at-sea movement patterns were associated with prey type (kittiwakes) and remotely sensed environmental variables (albatrosses). Furthermore, I identified variables affecting the spatial scale of search behavior and, for kittiwakes, the effect this has on reproductive success. Black-legged kittiwakes in Prince William Sound, Alaska, increased the number of feeding attempts with increases in the consumption of young-of-year fish and the numbers of feeding flocks encountered, both leading to greater time spent searching for food. Greater search effort translated into longer foraging trip duration (i.e., less frequent nestling provisioning), which was a dominant variable affecting reproductive success. Not surprisingly, area-restricted search activity for kittiwakes occurred over spatial scales two orders of magnitude less than that of short-tailed albatrosses (Phoebastria albatrus; 0.8 km vs. 70 km, respectively). For kittiwakes, the scale of area-restricted search was most prominently associated with prey type. I adapted firstpassage time analysis to model habitat use as a continuous process along a movement path and found that area-restricted search activity of short-tailed albatrosses was greatest along the continental shelf break and slope within regions of higher gradients of depth and chlorophyll a. Wind speed also was an important variable affecting albatross movements. By capitalizing on ocean surface wind and wave energy, albatrosses efficiently travel over vast expanses of the world?s oceans. I analyzed albatross aerodynamics and satellite remote sensing data to demonstrate that the four species of albatrosses inhabiting the North and Central Pacific Ocean exhibit differences in flight morphology that are generally consistent with respect to prevailing wind and wave conditions encountered. Some individuals, however, ventured into regions of apparently suboptimal wind and wave conditions to presumably exploit preferred foraging opportunities.
Download or read book Foraging Ecology of Wandering Albatrosses Diomedea Exulans written by Scott Andrew Shaffer and published by . This book was released on 2000 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging ecology and interactions with fisheries of wandering albatrosses Diomedea exulans breeding at South Georgia written by J.C. XAVIER and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metabolic Ecology written by Richard M. Sibly and published by John Wiley & Sons. This book was released on 2012-04-30 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the first textbooks in this emerging important field of ecology. Most of ecology is about metabolism: the ways that organisms use energy and materials. The energy requirements of individuals – their metabolic rates – vary predictably with their body size and temperature. Ecological interactions are exchanges of energy and materials between organisms and their environments. So metabolic rate affects ecological processes at all levels: individuals, populations, communities and ecosystems. Each chapter focuses on a different process, level of organization, or kind of organism. It lays a conceptual foundation and presents empirical examples. Together, the chapters provide an integrated framework that holds the promise for a unified theory of ecology. The book is intended to be accessible to upper-level undergraduate, and graduate students, but also of interest to senior scientists. Its easy-to-read chapters and clear illustrations can be used in lecture and seminar courses. Together they make for an authoritative treatment that will inspire future generations to study metabolic ecology.
Download or read book Antarctic Journal of the United States written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging ecology of albatrosses and petrels from South Georgia written by R.A. PHILLIPS and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Consequences of Range Expansion in Laysan Albatrosses written by Robert W. Henry and published by . This book was released on 2011 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology of Marine Birds written by E. A. Schreiber and published by CRC Press. This book was released on 2001-08-16 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biology of Marine Birds provides the only complete summary of information about marine birds ever published. It analyzes their breeding biology, ecology, taxonomy, evolution, fossil history, physiology, energetics, and conservation. The book covers four orders of marine birds in detail and includes two summary chapters that address the biology of shorebirds and wading birds and their lives in the marine environment. Summary tables give detailed information on various aspects of their life histories, breeding biology, physiology and energetics, and demography. It provides a guide to ornithologists and students for research projects.
Download or read book Foraging Ecology and Population Demography of Waved Albatrosses Phoebastria Irrorata written by Jill A. Awkerman and published by . This book was released on 2007 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Key words. Phoebastria irrorala, Galapagos Islands, Seabird habitat.
Download or read book The foraging behaviour and energetics of wandering albatrosses brooding chicks written by J.P.Y. ARNOULD and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging Ecology and Reproductive Energetics of Antarctic Fulmarine Petrels written by Peter John Hodum and published by . This book was released on 1999 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effectiveness of Marine Protected Areas for Top Predators Along the Central West African and US West Coasts written by Sara M. Maxwell and published by . This book was released on 2010 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative foraging ecology of planktivorous auklets in relation to ocean physics and prey availability written by G.L. HUNT and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Avian Energetics and Nutritional Ecology written by C. Carey and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: A symposium held in 1973 chaired and organized by William R. Dawson was the first major attempt to summarize and synthesize the existing information in the then emerging field of avian energetics. The symposium featured papers by James R. King, William A. Calder III, Vance A. Tucker, and Robert E. Ricklefs and com mentaries by George A. Bartholomew, S. Charles Kendeigh, and Eugene P. Odum. The proceedings of the symposium, Avian Energetics (Paynter 1974), played a critical role in stimulating interest and research in the field of avian energetics. Some twenty-odd years later, we are making another attempt to summarize the information in the field of avian energetics. Some obvious differences exist be tween its predecessor and this volume. Numerous improvements in methodology, such as the use of doubly labeled water to estimate metabolism in free-living birds, now allow researchers to ask questions that could not be addressed previ ously. Second, consideration of nutrition is now inseparable from that of energet ics. This merger is necessary not only because food intake is the source of both en ergy and nutrients but also because one or more nutrients, rather than energy, can be limiting for a given species in a particular instance. Finally, the study of ener getics and nutritional ecology, particularly in birds and mammals, has grown so dramatically that a single volume can now only partially cover the range of possi ble topics and can catalogue only a sampling of all the studies on the subject.
Download or read book Tropical Pinnipeds written by Juan J. Alava and published by CRC Press. This book was released on 2017-07-12 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pinnipeds are a fascinating group of marine mammals that play a crucial role as apex predators and sentinels of the functioning and health of marine ecosystems. They are found in the most extreme environments from the Polar regions to the tropics. Pinnipeds are comprised of about 34 species, and of those at least 25% live permanently in tropical zones. This book reviews and updates current research on the biology, marine ecology, bio-monitoring, and conservation of tropical pinniped populations, including their behavior, anthropogenic stressors, and health. It also looks at challenges to be faced for the conservation of tropical pinnipeds, many of which are threatened species.
