Allee effects are (broadly) defined as a decline in individual fitness at low population size or density. They can result in critical population thresholds below which populations crash to extinction. As such, they are very relevant to many conservation programmes, where scientists and managers are often working with populations that have been reduced to low densities or small numbers. There are a variety of mechanisms that can create Allee effects including mating systems, predation, environmental modification, and social interactions. The abrupt and unpredicted collapses of many exploited populations is just one illustration of the need to bring Allee effects to the forefront of conservation and management strategies.
Allee Effects in Ecology and Conservation provides a concise yet authoritative overview of the topic, collating and integrating a widely dispersed literature from various fields - marine and terrestrial, plant and animal, theoretical and empirical, academic and applied. This accessible text, with its clear and simple explanations of both empirical observations and theoretical predications is particularly suitable for professional and academic ecologists requiring an overview of the state-of-the-art in Allee effect research, as well as for graduate students in population ecology and conservation biology. It will also be of relevance to a wide readership of professionals in conservation and management requiring a concise summary of the topic.

This collection of original essays by economists, biologists and political scientists has a common theme: that protecting species at risk while safeguarding social order is a policy challenge that entangles biology, politics, and economics. Nearly 1200 species are listed as endangered or threatened under the Endangered Species Act (ESA) of 1973; only twelve have been removed from the list. Attempts at species recovery on public and private property lead the authors to examine the political realities that define the debate: who should pay the costs and receive the benefits, and how interest group behaviour affects the nature of endangered species protection. Although the ESA directs administrative agencies to list and protect species following scientific priorities, the collection addresses the economic choices that still must be confronted. These range from the protection potential of private markets to the design of incentive schemes to encourage conservation by private landowners.

In Plants and the K-T Boundary, two of the world's leading experts in palynology and paleobotany provide a comprehensive account of the fate of land plants during the 'great extinction' about 65 million years ago. They describe how the time boundary between the Cretaceous and Paleogene Periods (the K-T boundary) is recognized in the geological record, and how fossil plants can be used to understand global events of that time. There are case studies from over 100 localities around the world, including North America, China, Russia and New Zealand. The book concludes with an evaluation of possible causes of the K-T boundary event and its effects on floras of the past and present. This book is written for researchers and students in paleontology, botany, geology and Earth history, and everyone who has been following the course of the extinction debate and the K-T boundary paradigm shift.

Of the forty mammal species known to have vanished in the world in the last 200 years, almost half have been Australian. Our continent has the worst record of mammal extinctions, with over 65 mammal species having vanished in the last 50 000 years. It began with the great wave of megafauna extinctions in the last ice-age, and continues today, with many mammal species vulnerable to extinction. The question of why mammals became extinct, and why so many became extinct in Australia has been debated by experts for over a century and a half and we are no closer to agreement on the causes. This book introduces readers to the great mammal extinction debate. Chris Johnson takes us on a detective-like tour of these extinctions, uncovering how, why and when they occurred.

Of the forty mammal species known to have vanished in the world in the last 200 years, almost half have been Australian. Our continent has the worst record of mammal extinctions, with over 65 mammal species having vanished in the last 50 000 years. It began with the great wave of megafauna extinctions in the last ice-age, and continues today, with many mammal species vulnerable to extinction. The question of why mammals became extinct, and why so many became extinct in Australia has been debated by experts for over a century and a half and we are no closer to agreement on the causes. This book introduces readers to the great mammal extinction debate. Chris Johnson takes us on a detective-like tour of these extinctions, uncovering how, why and when they occurred.

There are many hypotheses describing the interactions involved in biological invasions, but it is largely unknown whether they are backed up by empirical evidence. This book fills that gap by developing a tool for assessing research hypotheses and applying it to twelve invasion hypotheses, using the hierarchy-of-hypotheses (HoH) approach, and mapping the connections between theory and evidence. In Part 1, an overview chapter of invasion biology is followed by an introduction to the HoH approach and short chapters by science theorists and philosophers who comment on the approach. Part 2 outlines the invasion hypotheses and their interrelationships. These include biotic resistance and island susceptibility hypotheses, disturbance hypothesis, invasional meltdown hypothesis, enemy release hypothesis, evolution of increased competitive ability and shifting defence hypotheses, tens rule, phenotypic plasticity hypothesis, Darwin's naturalization and limiting similarity hypotheses and the propagule pressure hypothesis. Part 3 provides a synthesis and suggests future directions for invasion research

Joel Sartore's quest to photograph all the animal species under human care celebrates its 15th year with this glorious and heartwrenching collection of photographs. The animals featured in these pages are either destined for extinction or already extinct in the wild but still alive today, thanks to dedication of a heroic group comitted to their continued survival. From the majestic Sumatran rhinoceros to the tiny Salt Creek tiger beetle, Sartore's photographs bring us eye to eye with the kaleidoscopic diversity of shapes, colors, personalities, and attitudes of the animal world.

In these vivid pages, Sartore singles out the species most likely to disappear in the next decades, as well as some that have already been lost. Alongside these indelible images are the words of scientists and conservationists who are working to protect and restore populations of endangered species. With Sartore's distinctive portrait photography, he invites us to look closer--and to care more.

A detailed exploration of the variety of threats that endangered species are facing around the world, whether they are due to human impact or so-called natural causes. Endangered species is a more complex issue and problem than it may seem on the surface. What species are endangered, and what is causing them to become vulnerable to population decline? How can essential industries such as farming, housing development, and manufacturing continue to thrive without harming flora and fauna that are protected? Are current efforts adequate or should more be done to protect endangered species? And who should be responsible for the substantial costs of working to save endangered species? Endangered Species: A Reference Handbook begins with an introduction that addresses major threats and extinctions in history, discusses the geographical and cultural contexts in which these incidents happened, highlights other key moments along the endangered species timeline, and clearly shows why the topic of endangered species matters. The following sections examine an unbiased synthesis of classic and contemporary studies that inform the issue of endangered species and outline the most controversial events related to endangered species and the actions that have been taken to address them. The book also presents perspective essays by scholars, activists, and other experts to provide diverse informed opinions on the issue of endangered species and includes a data and documents chapter that applies research finding to provide answers to questions like what species are most likely to become endangered in the future and which practices have historically been the most effective at protecting vulnerable species.

Beginning in 1984, Eric Dinerstein led a team directly responsible for the recovery of the greater one-horned rhinoceros in the Royal Chitwan National Park in Nepal, where the population had once declined to as few as 100 rhinos. The Return of the Unicorns is an account of what it takes to save endangered large mammals. In its pages, Dinerstein outlines the multifaceted recovery program-structured around targeted fieldwork and scientific research, effective protective measures, habitat planning and management, public-awareness campaigns, economic incentives to promote local guardianship, and bold, uncompromising leadership-that brought these extraordinary animals back from the brink of extinction. In an age when scientists must also become politicians, educators, fund-raisers, and activists to safeguard the subjects that they study, Dinerstein's inspiring story offers a successful model for large-mammal conservation that can be applied throughout Asia and across the globe.

Because carnivores are at the top of the food chain, it is often argued that protecting them will afford adequate protection to other taxa as well. In the past ten years, theoretical and empirical studies on carnivores have developed very quickly. This volume reviews and summarizes the current state of the field, describes limitations and opportunities for carnivore conservation, and offers a conceptual framework for future research and applied management. It will be of interest to students and researchers of conservation biology, mammalogy, animal behavior, ecology, and evolution.

The current high demand for fish and increased awareness of the role of the environment in supporting human well being has led to a situation where attitudes to inland water resources are changing rapidly.

Trends in resource use and environmental impact are very evident in inland waters which are particularly vulnerable as they act as collectors of all the activities occurring in their basins and rank as some of the most endangered ecosystems in the world. The principle changes influencing the evolution of the aquatic resource for fisheries are described in this book, which has been compiled for the Food and Agriculture Organization of the United Nations.

Since the release of the documentary Blackfish in 2013, millions around the world have focused on the plight of the orca, the most profitable and controversial display animal in history. Yet, until now, no historical account has explained how we came to care about killer whales in the first place. Drawing on interviews, official records, private archives, and his own family history, Jason M. Colby tells the exhilarating and often heartbreaking story of how people came to love the ocean's greatest predator. Historically reviled as dangerous pests, killer whales were dying by the hundreds, even thousands, by the 1950s-the victims of whalers, fishermen, and even the US military. In the Pacific Northwest, fishermen shot them, scientists harpooned them, and the Canadian government mounted a machine gun to eliminate them. But that all changed in 1965, when Seattle entrepreneur Ted Griffin became the first person to swim and perform with a captive killer whale. The show proved wildly popular, and he began capturing and selling others, including Sea World's first Shamu. Over the following decade, live display transformed views of Orcinus orca. The public embraced killer whales as charismatic and friendly, while scientists enjoyed their first access to live orcas. In the Pacific Northwest, these captive encounters reshaped regional values and helped drive environmental activism, including Greenpeace's anti-whaling campaigns. Yet even as Northwesterners taught the world to love whales, they came to oppose their captivity and to fight for the freedom of a marine predator that had become a regional icon. This is the definitive history of how the feared and despised "killer" became the beloved "orca"-and what that has meant for our relationship with the ocean and its creatures.

Because carnivores are at the top of the food chain, it is often argued that protecting them will afford adequate protection to other taxa as well. In the past ten years, theoretical and empirical studies on carnivores have developed very quickly. This volume reviews and summarizes the current state of the field, describes limitations and opportunities for carnivore conservation, and offers a conceptual framework for future research and applied management. It will be of interest to students and researchers of conservation biology, mammalogy, animal behavior, ecology, and evolution.

Today's conservation literature emphasizes landscape ecology and population genetics without addressing the behavioral links that enable the long-term survival of populations. This book presents theoretical and practical arguments for considering behavior patterns in attempts to conserve biodiversity. It brings together prominent scientists and wildlife managers to address a number of issues, including the limits and potentials of behavioral research to conservation, the importance of behavioral variation as a component of biodiversity, and the use of animal behavior to solve conservation problems. Throughout, the text provides specific direction for research and management practices. The book is unique in its emphasis on conservation of wild populations as opposed to captive and reintroduced populations, where behavioral research has concentrated in the past.

Genetically, the chimpanzee is humankind's closest relative in the animal kingdom. Yet in recent times humans have shown scant regard for the welfare of their intelligent cousin. Conflicts and endemic poverty across their range have decimated wild chimpanzee populations and they are today a seriously endangered species.

Destruction of their habitat and the bush meat trade have disrupted their complex social structures, often resulting in orphaned youngsters - some of which are sold illegally as exotic 'pets' to people who do not understand their highly specialised needs.

In association with the Jane Goodall Institute South Africa, Eugene Cussons and his family established Chimpanzee Eden in the South African Lowveld as a sanctuary for the relocation of abused and orphaned chimpanzees from all over Africa. Often at great personal risk, Cussons travels throughout strife-torn African countries and brings traumatised primates back to the safety of Chimp Eden where, for the first time for most of them, they have freedom and the opportunity of being with their own kind, as well as the attention of experts.

Saving Chimpanzees is a remarkable account of some of his rescue missions - complicated operations requiring diplomacy and no small measure of courage and dedication.

Would you ask a honeybee to point at a screen and recognise a facial expression? Or ask an elephant to climb a tree? While humans and non-human species may inhabit the same world, it's likely that our perceptual worlds differ significantly. Emphasising Uexkull's concept of 'umwelt', this volume offers practical advice on how animal cognition can be successfully tested while avoiding anthropomorphic conclusions. The chapters describe the capabilities of a range of animals - from ants, to lizards to chimpanzees - revealing how to successfully investigate animal cognition across a variety of taxa. The book features contributions from leading cognition researchers, each offering a series of examples and practical tips drawn from their own experience. Together, the authors synthesise information on current field and laboratory methods, providing researchers and graduate students with methodological advice on how to formulate research questions, design experiments and adapt studies to different taxa.

Britain was a very different place 15,000 years ago - home to lions, lynx, bears, wolves, bison and many more megafauna. But as its climate changed and human populations expanded, most of early Britain's largest mammals disappeared. Will advances in science and technology mean that we can one day bring these mammals back? And should we? In The Missing Lynx, palaeontologist Ross Barnett uses case studies, new fossil discoveries and biomolecular evidence to paint a picture of these lost species and to explore the ecological significance of their disappearance. He discusses how the Britons these animals shared their lives with might have viewed them and investigates why some species survived while others vanished. Barnett also looks in detail at the realistic potential of reintroductions, rewilding and even of resurrection in Britain and overseas, from the successful return of beavers in Argyll to the revolutionary Pleistocene Park in Siberia, which has already seen progress in the revival of 'mammoth steppe' grassland. As widespread habitat destruction, climate change and an ever-growing human population lead us inexorably towards the sixth extinction, this timely book explores the spaces that extinction has left unfilled. And by helping us to understand why some of our most charismatic animals are gone, Ross Barnett encourages us to look to a brighter future, one that might see these missing beasts returned to the land on which they once lived and died.

'Descriptive writing of a high order... this is an extremely intelligent book' The Times Join Douglas Adams, bestselling and beloved author of The Hitchhiker's Guide to the Galaxy, and zoologist Mark Carwardine on an adventure in search of the world's most endangered and exotic creatures. In this book, Adams' self-proclaimed favourite of his own works, the pair encounter animals in imminent peril: the giant Komodo dragon of Indonesia, the lovable kakapo of New Zealand, the blind river dolphins of China, the white rhinos of Zaire, the rare birds of Mauritius island in the Indian Ocean and the alien-like aye-aye of Madagascar. Inimitably witty and poignant, Last Chance to See is both a celebration of our most extraordinary creatures and a warning about what we have to lose if we do not act soon. Featuring a fantastic new foreword by the authors' long-time friend Stephen Fry, and an afterword from Mark Carwardine that considers what has changed since the book was first published, Last Chance to See feels more urgent than ever before. 'Douglas Adams' genius was in using comedy to make serious points about the world' Independent

Beginning in 1984, Eric Dinerstein led a team directly responsible for the recovery of the greater one-horned rhinoceros in the Royal Chitwan National Park in Nepal, where the population had once declined to as few as 100 rhinos. The Return of the Unicorns is an account of what it takes to save endangered large mammals. In its pages, Dinerstein outlines the multifaceted recovery program-structured around targeted fieldwork and scientific research, effective protective measures, habitat planning and management, public-awareness campaigns, economic incentives to promote local guardianship, and bold, uncompromising leadership-that brought these extraordinary animals back from the brink of extinction. In an age when scientists must also become politicians, educators, fund-raisers, and activists to safeguard the subjects that they study, Dinerstein's inspiring story offers a successful model for large-mammal conservation that can be applied throughout Asia and across the globe.

This book is the fourth in the series of statewise volumes on threatened birds of India, and is largely derived from Threatened Birds of India (2012) by Dr. Asad R. Rahmani, published by BNHS/OUP. Information has been updated according to the latest IUCN 2013 Red List for Birds, incorporating the changes in threat status recommended by BirdLife International, UK. The book describes the threatened and near threatened avian species of the state of Uttar Pradesh, with notes on their distribution, ecology, historical records and current distribution. Based on this updated information, appropriate recommendations have been made regarding the conservation action that needs to be taken for each species. The Introduction has been supplemented with short notes on extinct birds of Uttar Pradesh as well as threatened birds likely to be found in the state. Detailed descriptions are given for the species for which Uttar Pradesh holds critical habitats. Shorter descriptions are given for species marginal to the state. The book is intended to be a handy reference for interested readers, as well as decision makers at the state level, where conservation actions are implemented.

The habitats of most species have been fragmented by human actions, isolating small populations that consequently develop genetic problems. Millions of small, isolated, fragmented populations are likely suffering from inbreeding depression and loss of genetic diversity, greatly increasing their risk of extinction. Crossing between populations is required to reverse these effects, but managers rarely do so. A key reason for such inaction is that managers are often advised to manage populations in isolation whenever molecular genetic methods indicate genetic differences among them. Following this advice will often doom small populations to extinction when the habitat fragmentation and genetic differences were caused by human activities. A paradigm shift is required whereby evidence of genetic differentiation among populations is a trigger to ask whether any populations are suffering genetic problems, and if so, whether they can be rescued by augmenting gene flow. Consequently, there is now an urgent need for an authoritative practical guide to facilitate this paradigm shift in genetic management of fragmented populations.

The landscapes of Madagascar have long delighted zoologists, who have discovered, in and among the island's baobab trees and thickets, a dizzying array of animals, including something approaching one hundred species of lemur. Madagascar's mammal fauna, for example, is far more diverse, and more endemic, than early explorers and naturalists ever dreamed of. But in the 2,500 or so years since the arrival of the island's first human settlers, the vast majority of its forests have disappeared, and in the wake of this loss a number of species unique to Madagascar have vanished forever into extinction.
In "Extinct Madagascar," noted scientists Steven M. Goodman and William L. Jungers explore the recent past of these land animal extinctions. Beginning with an introduction to the geologic and ecological history of Madagascar that provides context for the evolution, diversification, and, in some cases, rapid decline of the Malagasy fauna, Goodman and Jungers then seek to recapture these extinct mammals in their environs. Aided in their quest by artist Velizar Simeonovski's beautiful and haunting paintings--images of both individual species and ecosystem assemblages reproduced here in full color--Goodman and Jungers reconstruct the lives of these lost animals and trace their relationships to those still living.
Published in conjunction with an exhibition of Simeonovski's paintings set to open at the Field Museum, Chicago, in the fall of 2014, Goodman and Jungers's awe-inspiring book will serve not only as a sobering reminder of the very real threat of extinction, but also as a stunning tribute to Madagascar's biodiversity and a catalyst for further research and conservation.

The Jarawa, one of the oldest tribes of human beings in the world, may go extinct because of a road that runs through pristine forests in the Indian-administered Andaman Islands, in the Bay of Bengal, and no one seems to care. Tourists take the road each day to try and get selfies with the tribespeople, who came from what is now Botswana over 60,000 years ago. Once proud of their independence, the Jarawa are now tempted with biscuits and trinkets, as if they were exotic animals in a human safari park. They can’t survive like this. In this astonishing book, Jonathan Lawley returns to what was once a penal colony built by the British to house Indian mutineers. He asks what responsibility colonial administrators like his grandfather may have had for the sad plight of these palaeolithic hunter- gatherers, and what the Indian government should now be doing to protect them.