Download or read book Distinguishing Between Specialism and Opportunism in the Diet of Herring Gulls written by Laura Post and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: For large gulls, predation of other waterbirds is generally considered a specialist strategy and may have potential benefits for reproductive success. During three years of study, however, nearly all herring gulls (Larus argentatus) breeding around the edges of a large ring-billed gull (L. delawarensis) colony on Gull Island, Ontario, were found to eat the chicks of this smaller species to some extent. I collected diet, behavioral, and productivity data to differentiate the extent to which predatory behavior was a specialist strategy or merely opportunistic, test the hypothesis that feeding on waterbirds is evolutionarily beneficial, and evaluate current management strategies in light of the results. Herring gulls predated ring-billed gull chicks most frequently when these chicks were most readily available: immediately after hatching and then again, around fledging when they formed crches on the beach. Herring gulls holding territories close to ring-billed gull crches exploited ring-billed gull prey to a greater extent. Behavioral watches and over 1,900 hours of remote video footage (both day and night) showed that all attacks were initiated within the herring gulls own breeding territories and predatory attacks did not include any specialized behavioral adaptations. Lastly, ring-billed gull chicks appeared to be a relatively poor food item for herring gull chicks and there was no consistent relationship between herring gull productivity and the proportion of ring-billed gull chicks in the diet. I conclude that at this site waterbird predation by herring gulls is predominantly opportunistic and does not appear to show any immediate benefit in terms of evolutionary fitness. This indicates that current management strategies based on controlling specialist predatory gulls are likely to be ineffectual in mixed-species colonies such as this and could be replaced by effective, non-lethal management, such as physical barriers.
Download or read book Current Ornithology Volume 17 written by Charles F. Thompson and published by Springer Science & Business Media. This book was released on 2010-09-09 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Ornithology publishes authoritative, up-to-date, scholarly reviews of topics selected from the full range of current research in avian biology. Topics cover the spectrum from the molecular level of organization to population biology and community ecology. The series seeks especially to review (1) fields in which an abundant recent literature will benefit from synthesis and organization, or (2) newly emerging fields that are gaining recognition as the result of recent discoveries or shifts in perspective, or (3) fields in which students of vertebrates may benefit from comparisons of birds with other classes. All chapters are invited, and authors are chosen for their leadership in the subjects under review.
Download or read book Birds as Monitors of Environmental Change written by R.W. Furness and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: Birds as Monitors of Environmental Change looks at how bird populations are affected by pollutants, water quality, and other physical changes and how this scientific knowledge can help in predicting the effects of pollutants and other physical changes in the environment.
Download or read book Seabird Ecology written by R. W. Furness and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last few years there has been an excltmg upsurge in seabird research. There are several reasons for this. Man's increased ex ploitation of natural resources has led to a greater awareness of the potential conflicts with seabirds, and of the use of seabirds to indicate the damage we might be doing to our environment. Many seabird populations have increased dramatically in numbers and so seem more likely to conflict with man, for example through competition for food or transmission of diseases. Oil exploration and production has resulted in major studies of seabird distributions and ecology in relation to oil pollution. The possibility that seabirds may provide information on fish stock biology is now being critically investigated. Some seabird species have suffered serious declines in numbers and require conservation action to be taken to reduce the chances that they will become extinct. This requires an understanding of the factors determining their population size and dynamics.
Download or read book Harriers of the World written by Robert E. Simmons and published by Oxford University Press, USA. This book was released on 2000 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harriers are a charismatic group of birds of prey with a worldwide distribution that have long fascinated bird watchers and scientists. Here for the first time the biology of the world's harriers is treated within one over, in readily accessible language. There are detailed comparisons of northern and southern species, descriptions of mating systems and population dynamics life histories, and insights into the selection pressures shaping the birds' life histories. The author addresses such questions as how females choose partners against their apparent self- interest, how they adjust to prevailing circumstances to produce the perfect clutch size, and what underlies variations in size dimorphism and copulation patterns. New information resulting from a DNA examination of the group reveals three new harrier species and allows construction of a new phylogeny of the harriers. The author's twin brother brings the book to life by fine original line drawings of these impressive birds. It will be a treat for all raptor biologists, amateur raptophiles, and behavioral ecologists interested in birds of prey.
Download or read book Conservation by Proxy written by Tim Caro and published by Island Press. This book was released on 2010-06-23 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast scope of conservation problems has forced biologists and managers to rely on "surrogate" species to serve as shortcuts to guide their decision making. These species-known by a host of different terms, including indicator, umbrella, and flagship species-act as proxies to represent larger conservation issues, such as the location of biodiversity hotspots or general ecosystem health. Synthesizing an immense body of literature, conservation biologist and field researcher Tim Caro offers systematic definitions of surrogate species concepts, explores biological theories that underlie them, considers how surrogate species are chosen, critically examines evidence for and against their utility, and makes recommendations for their continued use. The book clarifies terminology and contrasts how different terms are used in the real world considers the ecological, taxonomic, and political underpinnings of these shortcuts identifies criteria that make for good surrogate species outlines the circumstances where the application of the surrogate species concept shows promise Conservation by Proxy is a benchmark reference that provides clear definitions and common understanding of the evidence and theory behind surrogate species. It is the first book to review and bring together literature on more than fifteen types of surrogate species, enabling us to assess their role in conservation and offering guidelines on how they can be used most effectively.
Download or read book Fish for Life written by J. Kooiman and published by Amsterdam University Press. This book was released on 2005 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: An interdisciplinary survey addressing the problems of overfishing worldwide, and the best way forward toward good ecological practice and global cooperative governance.
Download or read book Tracking Animal Migration with Stable Isotopes written by and published by Academic Press. This book was released on 2008-04-09 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tracking Animal Migration with Stable Isotopes provides a consolidated overview of the current knowledge of stable isotopes in terrestrial migration research questions. It offers ecologists and conservation biologists provide a practical handbook for those considering using stable isotopes in their migration research. - Presents information for readers to understand how to apply isotopic methods for tracking - Critical information on areas for future research - Practical guidelines and discussions of sample collection, sample preparation, and data analysis - Enhanced understanding of data and statistical analysis in isotope-based studies of migratory animals
Download or read book Marine Insects written by Lanna Cheng and published by North-Holland. This book was released on 1976 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first exhaustive review of literature on marine insects, which are defined in this volume as those that spend at least part of their life in association with the marine environment. Not only are true insects, such as the Collembola and insect parasites of marine birds and mammals, considered, but also other kinds of intertidal air-breathing arthropods, notably spiders, scorpions, mites, centipedes and millipedes, which live and feed with, or even on, the insects of marine habitats. The chapters, written by leading authorities, are divided into two sections, the first treating primarily ecological aspects, the second dealing with major groups of insects in marine environments.
Download or read book Film Form written by Sergei Eisenstein and published by HMH. This book was released on 2014-06-17 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: A classic on the aesthetics of filmmaking from the pioneering Soviet director who made Battleship Potemkin. Though he completed only a half-dozen films, Sergei Eisenstein remains one of the great names in filmmaking, and is also renowned for his theory and analysis of the medium. Film Form collects twelve essays, written between 1928 and 1945, that demonstrate key points in the development of Eisenstein’s film theory and in particular his analysis of the sound-film medium. Edited, translated, and with an introduction by Jay Leyda, this volume allows modern-day film students and fans to gain insights from the man who produced classics such as Alexander Nevsky and Ivan the Terrible and created the renowned “Odessa Steps” sequence.
Download or read book On the Beneficence of Censorship written by Лев Лосев and published by Peter Lang Gmbh, Internationaler Verlag Der Wissenschaften. This book was released on 1984 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lev Loseff (1937), der Leningrad 1976 verlassen musste und seit 1979 in Hannover, New Hampshire am Dartmouth College in den USA als Professor of Russian Language and Literature lehrt, hat u.a. Werke von E. Svarc, N. Olejnikov und M. Bulgakov herausgegeben. In seiner ersten großen Monographie "On the Beneficence of Censorship: Aesopian Language in Modern Russian Literature" analysiert Loseff an Werken von Svarc, Solzenicyn, Evtusenko u.a. die aus der Auseinandersetzung mit der Zensur gebotenen stilistischen - auch bereichernden - Besonderheiten der modernen, in der Sowjetunion entstandenen russischen Literatur und veranschaulicht diese im Kontext von Werk, Autor und Epoche.
Download or read book Transnational Nazism written by Ricky W. Law and published by Cambridge University Press. This book was released on 2019-05-23 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first English-language study of German-Japanese interwar relations to employ sources in both languages.
Download or read book Effects of Climate Change on Birds written by Anders Pape Møller and published by Oxford University Press, USA. This book was released on 2010-08-12 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Effects of Climate Change on Birds provides an exhaustive and up-to-date synthesis of the science of climate change as it relates to birds." -- Back cover.
Download or read book The Common Tern written by Joanna Burger and published by iUniverse. This book was released on 1991 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than twenty years the authors studied the complex breeding and social behavior of colonies of terns. A significant dynamic of their social behavior is their “mobbing” behavior when they aggressively defend their nests against predators and will attack intruders, including human beings. Analysis of this and other behaviors as they affect breeding and population provide fascinating insights in the study of birds.
Download or read book Biological Invasions and Animal Behaviour written by Judith S. Weis and published by Cambridge University Press. This book was released on 2016-10-13 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive look at the critical role of animal behaviour in the success and impact of biological invasions.
Download or read book Placing the Academy written by Jennifer Sinor and published by . This book was released on 2007-03-31 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-one writers answer the call for literature that addresses who we are by understanding where we are--where, for each of them, being in some way part of academia. In personal essays, they imaginatively delineate and engage the diverse, occasionally unexpected play of place in shaping them, writers and teachers in varied environments, with unique experiences and distinctive world views, and reconfiguring for them conjunctions of identity and setting, here, there, everywhere, and in between. Contents I Introduction Writing Place, Jennifer Sinor II Here Six Kinds of Rain: Searching for a Place in the Academy, Kathleen Dean Moore and Erin E. Moore The Work the Landscape Calls Us To, Michael Sowder Valley Language, Diana Garcia What I Learned from the Campus Plumber, Charles Bergman M-I-Crooked Letter-Crooked Letter, Katherine Fischer On Frogs, Poems, and Teaching at a Rural Community College, Sean W. Henne III There Levittown Breeds Anarchists Film at 11:00, Kathryn T. Flannery Living in a Transformed Desert, Mitsuye Yamada A More Fortunate Destiny, Jayne Brim Box Imagined Vietnams, Charles Waugh IV Everywhere Teaching on Stolen Ground, Deborah A. Miranda The Blind Teaching the Blind: The Academic as Naturalist, or Not, Robert Michael Pyle Where Are You From? Lee Torda V In Between Going Away to Think, Scott Slovic Fronteriza Consciousness: The Site and Language of the Academy and of Life, Norma Elia Cantu Bones of Summer, Mary Clearman Blew Singing, Speaking, and Seeing a World, Janice M. Gould Making Places Work: Felt Sense, Identity, and Teaching, Jeffrey M. Buchanan VI Coda Running in Place: The Personal at Work, in Motion, on Campus, and in the Neighborhood, Rona Kaufman
Download or read book Place Branding written by R. Govers and published by Springer. This book was released on 2016-01-18 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of place branding is moving from infancy to adolescence. Many cities, and nations have already established their place brand and this well documented new book brings the fundamentals of place branding together in an academic format but is at the same time useful for practice.
