Tracking Animal Migration with Stable Isotopes

Download Tracking Animal Migration with Stable Isotopes PDF Online Free

Author :
Publisher : Academic Press
ISBN 13 : 0080559263
Total Pages : 157 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Tracking Animal Migration with Stable Isotopes by :

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

Stable Isotope Ecology

Download Stable Isotope Ecology PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 0387337458
Total Pages : 318 pages
Book Rating : 4.3/5 (873 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotope Ecology by : Brian Fry

Download or read book Stable Isotope Ecology written by Brian Fry and published by Springer Science & Business Media. This book was released on 2007-01-15 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: A solid introduction to stable isotopes that can also be used as an instructive review for more experienced researchers and professionals. The book approaches the use of isotopes from the perspective of ecological and biological research, but its concepts can be applied within other disciplines. A novel, step-by-step spreadsheet modeling approach is also presented for circulating tracers in any ecological system, including any favorite system an ecologist might dream up while sitting at a computer. The author’s humorous and lighthearted style painlessly imparts the principles of isotope ecology. The online material contains color illustrations, spreadsheet models, technical appendices, and problems and answers.

Stable Isotopes in Animal Ecology: a Primer

Download Stable Isotopes in Animal Ecology: a Primer PDF Online Free

Author :
Publisher :
ISBN 13 : 9780691139722
Total Pages : 0 pages
Book Rating : 4.1/5 (397 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotopes in Animal Ecology: a Primer by : Keith Hobson

Download or read book Stable Isotopes in Animal Ecology: a Primer written by Keith Hobson and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Stable Isotopes in Ecological Research

Download Stable Isotopes in Ecological Research PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 1461234980
Total Pages : 536 pages
Book Rating : 4.4/5 (612 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotopes in Ecological Research by : P.W. Rundel

Download or read book Stable Isotopes in Ecological Research written by P.W. Rundel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of stable isotope ratios represents one of the most exciting new technical advances in environmental sciences. In this book, leading experts offer the first survey of applications of stable isotope analysis to ecological research. Central topics are - plant physiology studies - food webs and animal metabolism - biogeochemical fluxes. Extensive coverage is given to natural isotopes of carbon, hydrogen, oxygen, nitrogen, sulfur, and strontium in both terrestrial and marine ecosystems. Ecologists of diverse research interests, as well as agronomists, anthropologists, and geochemists will value this overview for its wealth of information on theoretical background, experimental approaches, and technical design of studies utilizing stable isotope ratios.

Stable Isotopes in Animal Ecology

Download Stable Isotopes in Animal Ecology PDF Online Free

Author :
Publisher :
ISBN 13 : 9781124020921
Total Pages : 140 pages
Book Rating : 4.0/5 (29 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotopes in Animal Ecology by : Scott A. Carleton

Download or read book Stable Isotopes in Animal Ecology written by Scott A. Carleton and published by . This book was released on 2009 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stable isotope analysis is rapidly becoming an important method in an animal ecologist's toolbox. However, the field of isotopic ecology operates in a world of assumptions based largely on phenomenological data. It is important to test these assumptions if this field is going to continue to grow and prosper. This dissertation explores the application of stable isotopes to (1) determine the effects of temperature, metabolism, growth, and catabolism on isotopic incorporation, (2) develop new models to describe isotopic incorporation, and (3) characterize the breeding ground isotope signatures of a migratory game bird and determine if commonly used maps of isotopes in precipitation can be used to predict feather isotope values.

Stable Isotopes in Ecology and Environmental Science

Download Stable Isotopes in Ecology and Environmental Science PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470691174
Total Pages : 592 pages
Book Rating : 4.4/5 (76 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotopes in Ecology and Environmental Science by : Robert Michener

Download or read book Stable Isotopes in Ecology and Environmental Science written by Robert Michener and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights new and emerging uses of stable isotope analysis in a variety of ecological disciplines. While the use of natural abundance isotopes in ecological research is now relatively standard, new techniques and ways of interpreting patterns are developing rapidly. The second edition of this book provides a thorough, up-to-date examination of these methods of research. As part of the Ecological Methods and Concepts series which provides the latest information on experimental techniques in ecology, this book looks at a wide range of techniques that use natural abundance isotopes to: follow whole ecosystem element cycling understand processes of soil organic matter formation follow the movement of water in whole watersheds understand the effects of pollution in both terrestrial and aquatic environments study extreme systems such as hydrothermal vents follow migrating organisms In each case, the book explains the background to the methodology, looks at the underlying principles and assumptions, and outlines the potential limitations and pitfalls. Stable Isotopes in Ecology and Environmental Science is an ideal resource for both ecologists who are new to isotopic analysis, and more experienced isotope ecologists interested in innovative techniques and pioneering new uses.

Tracking Animal Migration with Stable Isotopes

Download Tracking Animal Migration with Stable Isotopes PDF Online Free

Author :
Publisher : Academic Press
ISBN 13 : 0128147245
Total Pages : 269 pages
Book Rating : 4.1/5 (281 download)

DOWNLOAD NOW!


Book Synopsis Tracking Animal Migration with Stable Isotopes by : Keith A. Hobson

Download or read book Tracking Animal Migration with Stable Isotopes written by Keith A. Hobson and published by Academic Press. This book was released on 2018-09-13 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tracking Animal Migration with Stable Isotopes, Second Edition, provides a complete introduction to new and powerful isotopic tools and applications that track animal migration, reviewing where isotope tracers fit in the modern toolbox of tracking methods. The book provides background information on a broad range of migration scenarios in terrestrial and aquatic systems and summarizes the most cutting-edge developments in the field that are revolutionizing the way migrant individuals and populations are assigned to their true origins. It allows undergraduates, graduate students and non-specialist scientists to adopt and apply isotopes to migration research, and also serves as a useful reference for scientists. The new edition thoroughly updates the information available to the reader on current applications of this technique and provides new tools for the isotopic assignment of individuals to origins, including geostatistical multi-isotope approaches and the ways in which researchers can combine isotopes with routine data in a Bayesian framework to provide best estimates of animal origins. Four new chapters include contributions on applications to the movements of terrestrial mammals, with particular emphasis on how aspects of animal physiology can influence stable isotope values. - Includes an animal physiology component that is an in-depth overview of the cautions and caveats related to this technique - Covers marine and aquatic isoscapes and methods to track marine organisms for researchers trying to apply isotopic tracking to animals in these environments - Features state-of-the-art statistical treatments for assignment and combining diverse datasets

Compound-specific Stable Isotope Analysis

Download Compound-specific Stable Isotope Analysis PDF Online Free

Author :
Publisher : Royal Society of Chemistry
ISBN 13 : 1782626107
Total Pages : 306 pages
Book Rating : 4.7/5 (826 download)

DOWNLOAD NOW!


Book Synopsis Compound-specific Stable Isotope Analysis by : Maik A Jochmann

Download or read book Compound-specific Stable Isotope Analysis written by Maik A Jochmann and published by Royal Society of Chemistry. This book was released on 2015-11-09 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of Compound-specific Stable Isotope Analysis (CSIA) is increasing in many areas of science and technology for source allocation, authentication, and characterization of transformation reactions. Until now, there have been no textbooks available for students with an analytical chemical background or basic introductory books emphasising the instrumentation and theory. This book is the first to focus solely on stable isotope analysis of individual compounds in sometimes complex mixtures. It acts as both a lecture companion for students and a consultant for advanced scientists in fields including forensic and environmental science. The book starts with a brief history of the field before going on to explain stable isotopes from scratch. The different ways to express isotope abundances are introduced together with isotope effects and isotopic fractionation. A detailed account of the required technical equipment and general procedures for CSIA is provided. This includes sections on derivatization and the use of microextraction techniques in GC-IRMS. The very important topic of referencing and calibration in CSIA is clearly described. This differs from approaches used in quantitative analysis and is often difficult for the newcomer to comprehend. Examples of successful applications of CSIA in food authenticity, forensics, archaeology, doping control, environmental science, and extraterrestrial materials are included. Applications in isotope data treatment and presentation are also discussed and emphasis is placed on the general conclusions that can be drawn from the uses of CSIA. Further instrumental developments in the field are highlighted and selected experiments are introduced that may act as a basis for a short practical course at graduate level.

An Experimental Exploration of the Use of Hydrogen and Oxygen Stable Isotopes in Animal Ecology

Download An Experimental Exploration of the Use of Hydrogen and Oxygen Stable Isotopes in Animal Ecology PDF Online Free

Author :
Publisher :
ISBN 13 : 9781124888224
Total Pages : 158 pages
Book Rating : 4.8/5 (882 download)

DOWNLOAD NOW!


Book Synopsis An Experimental Exploration of the Use of Hydrogen and Oxygen Stable Isotopes in Animal Ecology by : Nathan Wolf

Download or read book An Experimental Exploration of the Use of Hydrogen and Oxygen Stable Isotopes in Animal Ecology written by Nathan Wolf and published by . This book was released on 2011 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Stable Isotopes in Ecological Research

Download Stable Isotopes in Ecological Research PDF Online Free

Author :
Publisher : Springer
ISBN 13 : 9780387967127
Total Pages : 525 pages
Book Rating : 4.9/5 (671 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotopes in Ecological Research by : Philip Rundel

Download or read book Stable Isotopes in Ecological Research written by Philip Rundel and published by Springer. This book was released on 1988-11-16 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of stable isotope ratios represents one of the most exciting new technical advances in environmental sciences. In this book, leading experts offer the first survey of applications of stable isotope analysis to ecological research. Central topics are - plant physiology studies - food webs and animal metabolism - biogeochemical fluxes. Extensive coverage is given to natural isotopes of carbon, hydrogen, oxygen, nitrogen, sulfur, and strontium in both terrestrial and marine ecosystems. Ecologists of diverse research interests, as well as agronomists, anthropologists, and geochemists will value this overview for its wealth of information on theoretical background, experimental approaches, and technical design of studies utilizing stable isotope ratios.

Isoscapes

Download Isoscapes PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 9048133548
Total Pages : 495 pages
Book Rating : 4.0/5 (481 download)

DOWNLOAD NOW!


Book Synopsis Isoscapes by : Jason B. West

Download or read book Isoscapes written by Jason B. West and published by Springer Science & Business Media. This book was released on 2009-11-25 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stable isotope ratio variation in natural systems reflects the dynamics of Earth systems processes and imparts isotope labels to Earth materials. Carbon isotope ratios of atmospheric CO2 record exchange of carbon between the biosphere and the atmosphere; the incredible journeys of migrating monarchs is documented by hydrogen isotopes in their wings; and water carries an isotopic record of its source and history as it traverses the atmosphere and land surface. Through these and many other examples, improved understanding of spatio-temporal isotopic variation in Earth systems is leading to innovative new approaches to scientific problem-solving. This volume provides a comprehensive overview of the theory, methods, and applications that are enabling new disciplinary and cross-disciplinary advances through the study of "isoscapes": isotopic landscapes. "This impressive new volume shows scientists deciphering and using the natural isotope landscapes that subtly adorn our spaceship Earth.", Brian Fry, Coastal Ecology Institute, Louisiana State University, USA "An excellent timely must read and must-have reference book for anybody interested or engaged in applying stable isotope signatures to questions in e.g. Anthropology, Biogeochemistry, Ecology, or Forensic Science regarding chronological and spatial movement, changes, or distribution relating to animals, humans, plants, or water.", Wolfram Meier-Augenstein, Centre for Anatomy & Human Identification, University of Dundee, UK "Natural resources are being affected by global change, but exactly where, how, and at what pace? Isoscapes provide new and remarkably precise answers.", John Hayes, Woods Hole Oceanographic Institution, USA "This exciting volume is shaping a new landscape in environmental sciences that is utilizing the remarkable advances in isotope research to enhance and extend the capabilities of the field.", Dan Yakir, Weizmann Institute of Science, Israel

Stable Isotopes as Indicators of Ecological Change

Download Stable Isotopes as Indicators of Ecological Change PDF Online Free

Author :
Publisher : Academic Press
ISBN 13 : 0080551009
Total Pages : 436 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotopes as Indicators of Ecological Change by :

Download or read book Stable Isotopes as Indicators of Ecological Change written by and published by Academic Press. This book was released on 2011-09-21 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 20th century has experienced environmental changes that appear to be unprecedented in their rate and magnitude during the Earth's history. For the first time, Stable Isotopes as Indicators of Ecological Change brings together a wide range of perspectives and data that speak directly to the issues of ecological change using stable isotope tracers. The information presented originates from a range of biological and geochemical sources and from research fields within biological, climatological and physical disciplines covering time-scales from days to centuries. Unlike any other reference, editors discuss where isotope data can detect, record, trace and help to interpret environmental change. - Provides researchers with groundbreaking data on how to predict the terrestrial ecosystems response to the ongoing rapid alterations - Reveals how ecosystems have responded to environmental and biotic fluctuations in the past - Includes examples from research by a wide range of biological and physical scientists who are using isotopic records to both detect and interpret environmental change

A Primer on Stable Isotopes in Ecology

Download A Primer on Stable Isotopes in Ecology PDF Online Free

Author :
Publisher : Oxford University Press
ISBN 13 : 0192596705
Total Pages : 129 pages
Book Rating : 4.1/5 (925 download)

DOWNLOAD NOW!


Book Synopsis A Primer on Stable Isotopes in Ecology by : Francesca Cotrufo

Download or read book A Primer on Stable Isotopes in Ecology written by Francesca Cotrufo and published by Oxford University Press. This book was released on 2023-09-05 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past few decades, the field of ecology has made huge advancements thanks to stable isotopes. Ecologists need to understand the principles of stable isotopes to fully appreciate many studies in their discipline. Ecologists also need to be aware of isotopic approaches to enrich their “toolbox” for further advancing the discipline. A Primer on Stable Isotopes in Ecology is a concise and foundational resource for anyone interested in acquiring theoretical and practical knowledge for the application of stable isotopes in ecology. Readers will gain a more in-depth and complete knowledge of stable isotopes and explore isotopic methods used in ecological research, learning about stable isotope definitions, measurement, ecological processes, and applications in research. Chapters include in-depth descriptions of stable isotopes and their notation, isotope fractionation, isotope mixing, heavy isotope enrichment, and quantification methods by mass spectrometry and laser spectroscopy. The text guides readers to think "isotopically” to better understand research conducted using stable isotopes. The book also provides basic practical skills and activities to apply stable isotope methods in ecological research. It includes 5 activities through which readers can apply their knowledge to real-world problems and improve their skills for interpreting and using stable isotopes in ecological research. This book is designed for students and scientists from different backgrounds who share the common interest in stable isotopes.

Conservation Paleobiology

Download Conservation Paleobiology PDF Online Free

Author :
Publisher : University of Chicago Press
ISBN 13 : 022650686X
Total Pages : 329 pages
Book Rating : 4.2/5 (265 download)

DOWNLOAD NOW!


Book Synopsis Conservation Paleobiology by : Gregory P. Dietl

Download or read book Conservation Paleobiology written by Gregory P. Dietl and published by University of Chicago Press. This book was released on 2017-11-17 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: In conservation, perhaps no better example exists of the past informing the present than the return of the California condor to the Vermilion Cliffs of Arizona. Extinct in the region for nearly one hundred years, condors were successfully reintroduced starting in the 1990s in an effort informed by the fossil record—condor skeletal remains had been found in the area’s late-Pleistocene cave deposits. The potential benefits of applying such data to conservation initiatives are unquestionably great, yet integrating the relevant disciplines has proven challenging. Conservation Paleobiology gathers a remarkable array of scientists—from Jeremy B. C. Jackson to Geerat J. Vermeij—to provide an authoritative overview of how paleobiology can inform both the management of threatened species and larger conservation decisions. Studying endangered species is difficult. They are by definition rare, some exist only in captivity, and for those still in their native habitats any experimentation can potentially have a negative effect on survival. Moreover, a lack of long-term data makes it challenging to anticipate biotic responses to environmental conditions that are outside of our immediate experience. But in the fossil and prefossil records—from natural accumulations such as reefs, shell beds, and caves to human-made deposits like kitchen middens and archaeological sites—enlightening parallels to the Anthropocene can be found that might serve as a primer for present-day predicaments. Offering both deep-time and near-time perspectives and exploring a range of ecological and evolutionary dynamics and taxa from terrestrial as well as aquatic habitats, Conservation Paleobiology is a sterling demonstration of how the past can be used to manage for the future, giving new hope for the creation and implementation of successful conservation programs.

Avian Migration

Download Avian Migration PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 3662059576
Total Pages : 601 pages
Book Rating : 4.6/5 (62 download)

DOWNLOAD NOW!


Book Synopsis Avian Migration by : Peter Berthold

Download or read book Avian Migration written by Peter Berthold and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: P. Berthold and E. Gwinnd Bird migration is an intriguing aspect of the living world - so much so that it has been investigated for as long, and as thoroughly, as almost any other natural phenomenon. Aristotle, who can count as the founder of scientific ornithology, paid very close attention to the migrations of the birds he ob served, but it was not until the reign of Friedrich II, in the first half of the 13th century, that reliable data began to be obtained. From then on, the data base grew rapidly. Systematic studies of bird migration were introduced when the Vogelwarte Rossitten was founded, as the first ornithological biological observation station in the world (see first chapter "In Memory of Vogelwarte Rossitten"). This area later received enormous impetus when ex perimental research on the subject was begun: the large-scale bird-ringing experiment initiated in Rossitten in 1903 by Johannes Thienemann (who was inspired by the pioneering studies of C. C. M. Mortensen), the experiments on photoperiodicity carried out by William Rowan in the 1920s in Canada and retention and release experiments performed by Thienemann in the 1930s in Rossitten, the first experimental study on the orientation of migratory birds. After the Second World War, migration research, while continuing in the previous areas, also expanded into new directions such as radar ornithology, ecophysiology and hormonal control mechanisms, studies of evolution, ge netics, telemetry and others.

Physiological Ecology

Download Physiological Ecology PDF Online Free

Author :
Publisher : Princeton University Press
ISBN 13 : 0691074534
Total Pages : 758 pages
Book Rating : 4.6/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Physiological Ecology by : William H. Karasov

Download or read book Physiological Ecology written by William H. Karasov and published by Princeton University Press. This book was released on 2007-08-05 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlocking the puzzle of how animals behave and how they interact with their environments is impossible without understanding the physiological processes that determine their use of food resources. But long overdue is a user-friendly introduction to the subject that systematically bridges the gap between physiology and ecology. Ecologists--for whom such knowledge can help clarify the consequences of global climate change, the biodiversity crisis, and pollution--often find themselves wading through an unwieldy, technically top-heavy literature. Here, William Karasov and Carlos Martínez del Rio present the first accessible and authoritative one-volume overview of the physiological and biochemical principles that shape how animals procure energy and nutrients and free themselves of toxins--and how this relates to broader ecological phenomena. After introducing primary concepts, the authors review the chemical ecology of food, and then discuss how animals digest and process food. Their broad view includes symbioses and extends even to ecosystem phenomena such as ecological stochiometry and toxicant biomagnification. They introduce key methods and illustrate principles with wide-ranging vertebrate and invertebrate examples. Uniquely, they also link the physiological mechanisms of resource use with ecological phenomena such as how and why animals choose what they eat and how they participate in the exchange of energy and materials in their biological communities. Thoroughly up-to-date and pointing the way to future research, Physiological Ecology is an essential new source for upper-level undergraduate and graduate students-and an ideal synthesis for professionals. The most accessible introduction to the physiological and biochemical principles that shape how animals use resources Unique in linking the physiological mechanisms of resource use with ecological phenomena An essential resource for upper-level undergraduate and graduate students An ideal overview for researchers

Stable Isotopes to Trace Migratory Birds and to Identify Harmful Diseases

Download Stable Isotopes to Trace Migratory Birds and to Identify Harmful Diseases PDF Online Free

Author :
Publisher : Springer
ISBN 13 : 9783319282978
Total Pages : 0 pages
Book Rating : 4.2/5 (829 download)

DOWNLOAD NOW!


Book Synopsis Stable Isotopes to Trace Migratory Birds and to Identify Harmful Diseases by : G.J. Viljoen

Download or read book Stable Isotopes to Trace Migratory Birds and to Identify Harmful Diseases written by G.J. Viljoen and published by Springer. This book was released on 2016-08-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manuscript discusses the potentials of the approaches as mentioned below to monitor the AIVs in WMW. Molecular diagnostic platforms enable for accurate detection of the AIVs in the feces of infected birds. Similar technologies can be used to determine the bird species through DNA barcoding, enabling non-invasive research on the epidemiology of the disease. Wild migratory waterfowl (WMW) play significant role in the transmission of avian influenza viruses (AIVs) on large distances. Understanding bird migrations may therefore significantly contribute towards understanding of the disease epidemiology, however most conventional approaches to trace WMW migrations are based on capturing, tagging (mostly ringing or GPS devices) and their re-capturing to link the departure and arrival places. Stable isotope ratios in metabolically inert tissues (feathers, beaks, claws) reflect the ratios present at the point of intake (drinking or feeding), thus enabling for tracing bird origins at stopover places. Molecular diagnostic platforms such as the polymerase chain reaction (PCR) enable for accurate detection of the AIVs in the feces of infected birds. Similar technologies (genetic sequencing) can be used to determine the bird species through DNA barcoding. Simple and easy collection of feather and fecal samples at the stopover places may generate a full information package on which species of WMW carries the AIVs (PCR+DNA barcoding on the feces), as well as the origin of these species (SI+DNA barcoding on the feathers). Therefore, such approaches enable for research on the epidemiology and the ecology of the AIVs in WMW using a non-invasive platform, which does not require capturing of WMW. This manuscript discusses the potentials of these approaches to monitor the AIVs in WMW. p>