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Books > Science & Mathematics > Biology, life sciences > Zoology & animal sciences > Vertebrates > Mammals > Marine & freshwater mammals

Antarctic Seals - Research Methods and Techniques (Paperback): R.M. Laws Antarctic Seals - Research Methods and Techniques (Paperback)
R.M. Laws
R1,259 Discovery Miles 12 590 Ships in 10 - 15 working days

Despite its remote and seemingly rigorous environment, the Antarctic is the world's most important habitat for seals, currently supporting more seals than all other parts of the world combined. As various national Antarctic programmes were established to study these animals, the need to standardize techniques became apparent. This book, arising from work by the Scientific Committee on Antarctic Research (Group of Specialists on Seals), gives a detailed account of well-tried and, where possible, agreed methodologies, techniques, procedures and rationale for the collection and initial analysis of data on the biology and population ecology of Antarctic seals. This volume will not only help facilitate comparisons between different regions of Antarctica, but will also provide a guide for those studying seals in other parts of the world and those carrying out research on other large mammal species.

How to Give Up Plastic - Simple steps to living consciously on our blue planet (Paperback): Will McCallum How to Give Up Plastic - Simple steps to living consciously on our blue planet (Paperback)
Will McCallum 1
R199 R180 Discovery Miles 1 800 Save R19 (10%) Ships in 9 - 17 working days

'We have a responsibility, every one of us' David Attenborough Around 12.7 million tonnes of plastic are entering the ocean every year, killing over 1 million seabirds and 100,000 marine mammals. By 2050 there could be more plastic in the ocean than fish by weight. But how can YOU make a difference? This accessible guide will help you make the small changes that make a big difference, including: * Using a wash bag to catch plastic microfibers * Replacing your regular shampoo with bar shampoo * How to throw a plastic-free birthday party Plastic is not going away without a fight. This is a call to arms - to join forces across the world and end our dependence on plastic. #BreakFreeFromPlastic

Cetacean Societies (Paperback, New): Janet Mann Cetacean Societies (Paperback, New)
Janet Mann
R2,292 Discovery Miles 22 920 Ships in 10 - 15 working days

"Part review, part testament to extraordinary dedication, and part call to get involved, "Cetacean Societies" highlights the achievements of behavioral ecologists inspired by the challenges of cetaceans and committed to the exploration of a new world."--from the preface by Richard Wrangham
Long-lived, slow to reproduce, and often hidden beneath the water's surface, whales and dolphins (cetaceans) have remained elusive subjects for scientific study even though they have fascinated humans for centuries. Until recently, much of what we knew about cetaceans came from commercial sources such as whalers and trainers for dolphin acts. Innovative research methods and persistent efforts, however, have begun to penetrate the depths to reveal tantalizing glimpses of the lives of these mammals in their natural habitats.
"Cetacean Societies" presents the first comprehensive synthesis and review of these new studies. Groups of chapters focus on the history of cetacean behavioral research and methodology; state-of-the-art reviews of information on four of the most-studied species: bottlenose dolphins, killer whales, sperm whales, and humpback whales; and summaries of major topics, including group living, male and female reproductive strategies, communication, and conservation drawn from comparative research on a wide range of species.
Written by some of the world's leading cetacean scientists, this landmark volume will benefit not just students of cetology but also researchers in other areas of behavioral and conservation ecology as well as anyone with a serious interest in the world of whales and dolphins.
Contributors are Robin Baird, Phillip Clapham, Jenny Christal, Richard Connor, Janet Mann, Andrew Read, Randall Reeves, Amy Samuels, Peter Tyack, Linda Weilgart, Hal Whitehead, Randall S. Wells, and Richard Wrangham.

Challenges in Estuarine and Coastal Science - Estuarine and Coastal Sciences Association 50th Anniversary Volume (Paperback):... Challenges in Estuarine and Coastal Science - Estuarine and Coastal Sciences Association 50th Anniversary Volume (Paperback)
John Humphreys, Sally Little
R1,448 Discovery Miles 14 480 Ships in 10 - 15 working days

Estuarine and coastal waters are acknowledged centres for anthropogenic impacts. Superimposed on the complex natural interactions between land, rivers and sea are the myriad consequences of human activity - a spectrum ranging from locally polluting effluents to some of the severest consequences of global climate change. For practitioners, academics and students in the field of coastal science and policy, this timely book examines and exemplifies current and future challenges: from upper estuaries to open coasts and adjacent seas; from tropical to temperate latitudes; from Europe to Australia. This authoritative volume marks the 50th anniversary of the Estuarine and Coastal Sciences Association. Drawing on the expertise of more than 60 specialist contributors, individual chapters address coastal erosion and deposition; open shores to estuaries and deltas; marine plastics; coastal squeeze and habitat loss; tidal freshwaters - saline incursion and estuarine squeeze; restoration management using remote data collection; carbon storage; species distribution and non-natives; shorebirds; Modelling environmental change; physical processes such as sediments and modelling; sea level rise and estuarine tidal dynamics; estuaries as fish nurseries; policy versus reality in coastal conservation; developments in estuarine, coastal and marine management. In addition to providing an overview of current scientific understanding, the material gathered here offers a clear-eyed perspective on what needs to be done to protect these fragile - and vital - ecosystems.

Freshwater Biodiversity - Status, Threats and Conservation (Paperback): David Dudgeon Freshwater Biodiversity - Status, Threats and Conservation (Paperback)
David Dudgeon
R1,268 Discovery Miles 12 680 Ships in 10 - 15 working days

Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.

Save Your Life with the Elixir of Water - Becoming pH Balanced in an Unbalanced World - Large Print (Paperback): Blythe Ayne Save Your Life with the Elixir of Water - Becoming pH Balanced in an Unbalanced World - Large Print (Paperback)
Blythe Ayne
R312 Discovery Miles 3 120 Ships in 18 - 22 working days
Compelling Conversations with Dolphins and Whales in the Wild - Vital Lessons for Living in Joy and Healing our World... Compelling Conversations with Dolphins and Whales in the Wild - Vital Lessons for Living in Joy and Healing our World (Paperback)
Bobbie Merrill
R378 Discovery Miles 3 780 Ships in 18 - 22 working days
Draw Your Own Encyclopaedia Scotland's Dolphins (Paperback): Colin M. Drysdale Draw Your Own Encyclopaedia Scotland's Dolphins (Paperback)
Colin M. Drysdale
R372 Discovery Miles 3 720 Ships in 18 - 22 working days
Endangered Orcas (Book): Monika Wieland Shields Endangered Orcas (Book)
Monika Wieland Shields
R612 R566 Discovery Miles 5 660 Save R46 (8%) Ships in 18 - 22 working days
Stressors in the Marine Environment - Physiological and ecological responses; societal implications (Hardcover): Martin Solan,... Stressors in the Marine Environment - Physiological and ecological responses; societal implications (Hardcover)
Martin Solan, Nia Whiteley
R4,181 Discovery Miles 41 810 Ships in 10 - 15 working days

A multitude of direct and indirect human influences have significantly altered the environmental conditions, composition, and diversity of marine communities. However, understanding and predicting the combined impacts of single and multiple stressors is particularly challenging because observed ecological feedbacks are underpinned by a number of physiological and behavioural responses that reflect stressor type, severity, and timing. Furthermore, integration between the traditional domains of physiology and ecology tends to be fragmented and focused towards the effects of a specific stressor or set of circumstances. This novel volume summarises the latest research in the physiological and ecological responses of marine species to a comprehensive range of marine stressors, including chemical and noise pollution, ocean acidification, hypoxia, UV radiation, thermal and salinity stress before providing a perspective on future outcomes for some of the most pressing environmental issues facing society today. Stressors in the Marine Environment synthesises the combined expertise of a range of international researchers, providing a truly interdisciplinary and accessible summary of the field. It is essential reading for graduate students as well as professional researchers in environmental physiology, ecology, marine biology, conservation biology, and marine resource management. It will also be of particular relevance and use to the regulatory agencies and authorities tasked with managing the marine environment, including social scientists and environmental economists.

Are Dolphins Really Smart? - The mammal behind the myth (Paperback): Justin Gregg Are Dolphins Really Smart? - The mammal behind the myth (Paperback)
Justin Gregg
R324 Discovery Miles 3 240 Ships in 10 - 15 working days

How intelligent are dolphins? Is their communication system really as complex as human language? And are they as friendly and peaceful as they are made out to be? The Western world has had an enduring love affair with dolphins since the early 1960s, with fanciful claims of their 'healing powers' and 'super intelligence'. Myths and pseudoscience abound on the subject. Justin Gregg weighs up the claims made about dolphin intelligence and separates scientific fact from fiction. He puts our knowledge about dolphin behaviour and intelligence into perspective, with comparisons to scientific studies of other animals, especially the crow family and great apes. He gives fascinating accounts of the challenges of testing what an animal with flippers and no facial expressions might be animal behaviour, Gregg challenges many of the widespread beliefs about dolphins, while also inspiring the reader with the remarkable abilities common to many of the less glamorized animals around us - such as chickens.

An Introduction to Marine Mammal Biology and Conservation (Paperback): E. C. M. Parsons An Introduction to Marine Mammal Biology and Conservation (Paperback)
E. C. M. Parsons
R4,348 Discovery Miles 43 480 Ships in 18 - 22 working days

The Charismatic Mammals That Live In The Ocean Are A Constant Source Of Interest, Both For Scientists And Our Society At Large. Their Biology, Behavior, And Conservation Are Of Utmost Importance, As A Vast Number Of Species Are Currently Threatened. Intended For The Upper-Level Undergraduate Or Graduate Student Within Biology, Marine Biology, Or Conservation/Environmental Science, An Introduction To Marine Mammal Biology And Conservation Provides A Broad Introduction To Marine Mammal Biology Using Cutting Edge Information And Student-Friendly Learning Tools. The Text Begins With Chapters On The Evolution And Classification Of Marine Mammals And Their General Biology. It Moves On To Discuss The Behavior And Ecology Of Different Groups Of Marine Mammals, Such As Polar Bears, Otters, And Cetaceans. Part 3 Dives Into Many Different Conservation Issues Facing Marine Mammals, As Well As Discussions On How They Can Be Addressed. Closing Chapters Provide Information On How Scientists Study Marine Mammals, How Society Can Enjoy Observing The Animals While Making Sure They Are Preserved, And A Word To Students Looking To Pursue A Career With Marine Mammals.

Marine Mammal Ecology and Conservation - A Handbook of Techniques (Paperback): Ian L. Boyd, W. Don Bowen, Sara J. Iverson Marine Mammal Ecology and Conservation - A Handbook of Techniques (Paperback)
Ian L. Boyd, W. Don Bowen, Sara J. Iverson
R1,894 Discovery Miles 18 940 Ships in 10 - 15 working days

Marine mammals command a high level of public attention, reflected in specific legislation for their protection and management in many countries. They also present particular challenges to ecologists and conservation biologists. They are mostly difficult to observe, they occupy an environment that is vast in its three dimensional extent, there are often perceived conflicts between marine mammals and people, and furthermore several species are now close to extinction.
Marine mammals have some intriguing features in their biology - the ability to dive to crushing depths, to perform breath-hold dives that defy our current understanding of mammalian physiology, and many have an ability to hunt down prey using sophisticated sonar that we are only just beginning to understand. Many species also have complex social structures. We still have much to learn about these extraordinary animals so a comprehensive and authoritative overview of current methodology is now timely. The intention of this book is both to summarize the state-of-the-art and to encourage innovation and further progress in this research field.

Marine Mammals and Noise (Paperback, New edition): W. John Richardson, Charles R. Greene Jr., Charles I. Malme, Denis H. Thomson Marine Mammals and Noise (Paperback, New edition)
W. John Richardson, Charles R. Greene Jr., Charles I. Malme, Denis H. Thomson; Contributions by Sue E. Moore, …
R2,689 Discovery Miles 26 890 Ships in 18 - 22 working days

Many marine mammals communicate by emitting sounds that pass through water. Such sounds can be received across great distances and can influence the behavior of these undersea creatures. In the past few decades, the oceans have become increasingly noisy, as underwater sounds from propellers, sonars, and other human activities make it difficult for marine mammals to communicate. This book discusses, among many other topics, just how well marine mammals hear, how noisy the oceans have become, and what effects these new sounds have on marine mammals. The baseline of ambient noise, the sounds produced by machines and mammals, the sensitivity of marine mammal hearing, and the reactions of marine mammals are also examined.
An essential addition to any marine biologist's library, Marine Mammals and Noise will be especially appealing to marine mammalogists, researchers, policy makers and regulators, and marine biologists and oceanographers using sound in their research.

Dolphins (Paperback): Tammy Everts, Bobbie Kalman Dolphins (Paperback)
Tammy Everts, Bobbie Kalman
R240 Discovery Miles 2 400 Ships in 10 - 15 working days

Discusses the physiology and behavior of dolphins including care of young, hunting and feeding, intelligence, social patterns, and habitats.

Biology, Evolution & Conservation of River Dolphins within South America & Asia (Hardcover): Joseph Mark Shostell, Manuel... Biology, Evolution & Conservation of River Dolphins within South America & Asia (Hardcover)
Joseph Mark Shostell, Manuel Ruiz-Garcia
R5,722 R4,653 Discovery Miles 46 530 Save R1,069 (19%) Ships in 10 - 15 working days

True river dolphins as well as marine dolphins that frequent freshwater systems are large animals that have traditionally gone unnoticed by the general public and, in a certain sense, by marine mammal specialists as well. In fact, only a limited number of researchers have investigated the biology of these dolphin species. This is quite surprising given that these species are commonly the top predators in their habitats. Now for the first time, revolutionary molecular techniques are being applied to answer evolutionary reconstruction questions of many animals, including river dolphins. In addition, new paleontological records are dramatically changing our perspective about the relationships of these dolphins with each other and with other cetaceans. In this book, new census information and important ecological characteristics are provided of the river dolphins Inia, Sotalia, Pontoporia, Lioptes, and Orcaella. For the first time, molecular and genetic results of theses dolphin species are presented. A compilation of these data is essential if we are to present a strategic conservation plan for these animals. Upon being informed of critical evolutionary historical data, conservation biologists will now be able to tailor their conservation efforts for each threatened river dolphin species. Additionally, new morphological data and the new discoveries in the fossil record for river dolphins are examined. The major dolphin specialists in Colombia, Brazil, Bolivia, Argentina, the United States of America, China, and India present their newest results within a single book that graduate students, professors, scientists, evolutionary ecologists, aquatic mammalogists, population ecologists, conservation ecologists, and marine biologists will all find valuable for the foreseeable future.

Freshwater Biodiversity - Status, Threats and Conservation (Hardcover): David Dudgeon Freshwater Biodiversity - Status, Threats and Conservation (Hardcover)
David Dudgeon
R2,339 Discovery Miles 23 390 Ships in 10 - 15 working days

Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.

The Bottlenose Dolphin - Biology and Conservation (Paperback): John E. Reynolds III, Randall S Wells, Samantha D. Eide The Bottlenose Dolphin - Biology and Conservation (Paperback)
John E. Reynolds III, Randall S Wells, Samantha D. Eide
R637 R581 Discovery Miles 5 810 Save R56 (9%) Ships in 18 - 22 working days

The Bottlenose Dolphin presents for the first time a comprehensive, colorfully illustrated, and concise overview of a species that has fascinated humans for at least 3,000 years. After reviewing historical myths and legends of the dolphin back to the ancient Greeks and discussing current human attitudes and interactions, the author replaces myths with facts--up-to-date scientific assessment of dolphin evolution, behavior, ecology, morphology, reproduction, and genetics--while also tackling the difficult issues of dolphin conservation and management. Although comprehensive enough to be of great value to professionals, educators, and students, the book is written in a manner that all dolphin lovers will enjoy. Randall Wells's anecdotes interspersed throughout the work offer a first-hand view of dolphin encounters and research based on three decades working with them. Color photographs and nearly 100 black and white illustrations, including many by National Geographic photographer Flip Nicklin, beautifully enhance the text. Readers of The Bottlenose Dolphin will better appreciate what dolphins truly are and do, as well as understand some of the controversies surrounding them. While raising compelling questions, the book provides a wealth of information on a legendary species that is loved and admired by many people.

Beautiful Minds - The Parallel Lives of Great Apes and Dolphins (Paperback): Maddalena Bearzi, Craig Stanford Beautiful Minds - The Parallel Lives of Great Apes and Dolphins (Paperback)
Maddalena Bearzi, Craig Stanford
R689 Discovery Miles 6 890 Ships in 10 - 15 working days

Apes and dolphins: primates and cetaceans. Could any creatures appear to be more different? Yet both are large-brained intelligent mammals with complex communication and social interaction. In the first book to study apes and dolphins side by side, Maddalena Bearzi and Craig B. Stanford, a dolphin biologist and a primatologist who have spent their careers studying these animals in the wild, combine their insights with compelling results. "Beautiful Minds" explains how and why apes and dolphins are so distantly related yet so cognitively alike and what this teaches us about another large-brained mammal: Homo sapiens.

Noting that apes and dolphins have had no common ancestor in nearly 100 million years, Bearzi and Stanford describe the parallel evolution that gave rise to their intelligence. And they closely observe that intelligence in action, in the territorial grassland and rainforest communities of chimpanzees and other apes, and in groups of dolphins moving freely through open coastal waters. The authors detail their subjects ability to develop family bonds, form alliances, and care for their young. They offer an understanding of their culture, politics, social structure, personality, and capacity for emotion. The resulting dual portrait with striking overlaps in behavior is key to understanding the nature of beautiful minds.

Dolphin Societies - Discoveries and Puzzles (Paperback, Revised): Karen Pryor, Kenneth S. Norris Dolphin Societies - Discoveries and Puzzles (Paperback, Revised)
Karen Pryor, Kenneth S. Norris
R1,117 Discovery Miles 11 170 Ships in 18 - 22 working days

Wild dolphins are an elusive subject. How can you study the behaviour of animals usually visible only as a glimpse of rolling dorsal fins heading for the horizon? Two scientists in the field have assembled a variety of discoveries about dolphins, from tiny spinners to familiar bottle-nosed dolphins, and their whale cousins, including pilot and killer whales. The researchers have followed dolphins in boats, tracked them from shore, dived among them, and used genetic analysis and artificial language to read their life history from a single tooth. This text not only surveys interesting research on dolphin behaviour, but it also offers lay readers a look at the scientific mind at work.

The Hawaiian Spinner Dolphin (Hardcover, New): Kenneth S. Norris, Bernd Wursig, Randall S Wells, Melany Wursig The Hawaiian Spinner Dolphin (Hardcover, New)
Kenneth S. Norris, Bernd Wursig, Randall S Wells, Melany Wursig; Contributions by Shannon M. Brownlee, …
R1,979 Discovery Miles 19 790 Ships in 18 - 22 working days

This absorbing book is the first comprehensive scientific natural history of a dolphin species ever written. From their research camp at Kealake'akua Bay in Hawaii, the authors followed a population of wild spinner dolphins for more than twenty years. They observed marked animals by ship, by air, from a cliffside observation post, by radiotracking their movements, and by studying the details of their underwater social life with the use of a windowed underwater vessel. Beginning with a description of the spinner dolphin species, including its morphology and systematics, the book examines the ocean environment and organization of dolphin populations and the way this school-based society of mammals uses shorelines for rest and instruction of the young. An analysis of the dolphins' reproductive patterns, which resemble those of other group-dwelling mammals such as certain primates, suggests a fission-fusion society. Vision, vocalization, hearing, breathing, feeding, predation, integration of the school, and school movement are all examined to give the fullest picture yet published of dolphin biological life. One of the most striking features of the species is the length of the period of juvenility and instruction of the young. The authors argue that dolphins may legitimately be called "cultural", and they turn in their conclusion to a comprehensive evolutionary analysis of this marine cultural system with its behavioral flexibility and high levels of cooperation. In a challenging new interpretation of how cultural organisms may evolve, they propose that spinner dolphin society be viewed as a set of nested levels of organization that influence one another by selectional biases. The resultingcooperative patterns support both the sociology and the cultural levels of organization, without being overridden by the supposed imperative of kin selection. Twenty years in the making by a renowned scientist and his associates, this absorbing book is the richest source available of new scientific insights about the lives of wild dolphins and how their societies evolved at sea.

Handbook of Whales, Dolphins, and Porpoises of the World (Paperback): Mark Carwardine Handbook of Whales, Dolphins, and Porpoises of the World (Paperback)
Mark Carwardine
R826 R724 Discovery Miles 7 240 Save R102 (12%) Ships in 18 - 22 working days

The most authoritative reference guide to every cetacean species and subspecies in the world Handbook of Whales, Dolphins, and Porpoises of the World is the most comprehensive and up-to-date guide to these popular mammals. With nearly 1,000 accurate color illustrations-complete with detailed annotations pointing out significant field marks-this outstanding book covers all 90 species and every subspecies of cetaceans around the globe. Leading cetacean biologists have collaborated with pioneering conservationist Mark Carwardine on the concise text, which is packed with helpful identification tips. From the blue whale to the Indo-Pacific finless porpoise, the illuminating species accounts are accompanied by abundant distribution maps and photographs. Designed to ensure easy access to critical information, Handbook of Whales, Dolphins, and Porpoises of the World is an indispensable resource that every whale watcher and cetacean seeker will find invaluable. Provides details on every species and subspecies of whale, dolphin, and porpoise Features nearly 1,000 meticulous color illustrations and 90 distribution maps Includes helpful facts about behavior, life history, and conservation

Marine Mammal Biology - An Evolutionary Approach (Hardcover): Pooja Pandya Marine Mammal Biology - An Evolutionary Approach (Hardcover)
Pooja Pandya
R4,358 R3,835 Discovery Miles 38 350 Save R523 (12%) Ships in 10 - 15 working days

Taking an integrated approach to the biology of marine mammals; this book provides a general introduction to the biology of marine mammals, and an overview of the adaptations that have permitted mammals to succeed in the marine environment. It contains information for the interested beach dweller or student and for the scientist or marine resource manager, exploring the essential aspects of what makes marine mammals physiologically ""different"" from terrestrial mammals in regard to life in the sea.

Shark Tracker - Confessions of an underwater cameraman (Paperback): Richard Fitzpatrick Shark Tracker - Confessions of an underwater cameraman (Paperback)
Richard Fitzpatrick
R794 Discovery Miles 7 940 Ships in 18 - 22 working days

Killer tales from an award-winning cinematographer and marine biologist. Marine biologist and underwater cameraman Richard 'Shark Tracker' Fitzpatrick wrangles sharks and other deadly marine creatures for a living. From the coral gardens of the Great Barrier Reef to the murky depths of the Amazon, Fitzpatrick shares his real-life experiences with predators of the deep - from sharks and box jellyfish to sea snakes. A mixture of mind-boggling anecdotes and science provide an intimate insight into marine life and the conservation issues at stake.

Narwhals - Arctic Whales in a Melting World (Hardcover): Todd McLeish Narwhals - Arctic Whales in a Melting World (Hardcover)
Todd McLeish
R2,931 Discovery Miles 29 310 Ships in 18 - 22 working days

Among all the large whales on Earth, the most unusual and least studied is the narwhal, the northernmost whale on the planet and the one most threatened by global warming. Narwhals thrive in the fjords and inlets of northern Canada and Greenland. These elusive whales, whose long tusks were the stuff of medieval European myths and Inuit legends, are uniquely adapted to the Arctic ecosystem and are able to dive below thick sheets of ice to depths of up to 1,500 meters in search of their prey-halibut, cod, and squid. Join Todd McLeish as he travels high above the Arctic circle to meet: Teams of scientific researchers studying the narwhal's life cycle and the mysteries of its tusk Inuit storytellers and hunters Animals that share the narwhals' habitat: walruses, polar bears, bowhead and beluga whales, ivory gulls, and two kinds of seals McLeish consults logbooks kept by whalers and explorers and interviews folklorists and historians to tease out the relationship between the real narwhal and the mythical unicorn. In Colorado, he visits climatologists studying changes in the seasonal cycles of the Arctic ice. From a history of the trade in narwhal tusks to descriptions of narwhals' vocalizations as heard through hydrophones, Narwhals reveals the beauty and thrill of the narwhal and its habitat, and the threat it faces from a rapidly changing world. Watch the trailer: http://www.youtube.com/watch?v=gHwaqdKyLCQ&list=UUge4MONgLFncQ1w1C_BnHcw&index=9&feature=plcp

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