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

Floating Gold - A Natural (and Unnatural) History of Ambergris (Paperback): Christopher Kemp Floating Gold - A Natural (and Unnatural) History of Ambergris (Paperback)
Christopher Kemp
R473 Discovery Miles 4 730 Ships in 9 - 15 working days

A fascinating natural history of an incredibly curious substance. "Preternaturally hardened whale dung" is not the first image that comes to mind when we think of perfume, otherwise a symbol of glamour and allure. But the key ingredient that makes the sophisticated scent linger on the skin is precisely this bizarre digestive by-product-ambergris. Despite being one of the world's most expensive substances (its value is nearly that of gold and has at times in history been triple it), ambergris is also one of the world's least known. But with this unusual and highly alluring book, Christopher Kemp promises to change that by uncovering the unique history of ambergris. A rare secretion produced only by sperm whales, which have a fondness for squid but an inability to digest their beaks, ambergris is expelled at sea and floats on ocean currents for years, slowly transforming, before it sometimes washes ashore looking like a nondescript waxy pebble. It can appear almost anywhere but is found so rarely, it might as well appear nowhere. Kemp's journey begins with an encounter on a New Zealand beach with a giant lump of faux ambergris-determined after much excitement to nothing more exotic than lard-that inspires a comprehensive quest to seek out ambergris and its story. He takes us from the wild, rocky New Zealand coastline to Stewart Island, a remote, windswept island in the southern seas, to Boston and Cape Cod, and back again. Along the way, he tracks down the secretive collectors and traders who populate the clandestine modern-day ambergris trade. Floating Gold is an entertaining and lively history that covers not only these precious gray lumps and those who covet them, but presents a highly informative account of the natural history of whales, squid, ocean ecology, and even a history of the perfume industry. Kemp's obsessive curiosity is infectious, and eager readers will feel as though they have stumbled upon a precious bounty of this intriguing substance.

Marine Conservation (Hardcover): P. Keith Probert Marine Conservation (Hardcover)
P. Keith Probert
R2,943 Discovery Miles 29 430 Ships in 12 - 17 working days

Providing a comprehensive account of marine conservation, this book examines human use and abuse of the world's seas and oceans and their marine life, and the various approaches to management and conservation. Healthy marine ecosystems - the goods and services that they provide - are of vital importance to human wellbeing. There is a pressing need for a global synthesis of marine conservation issues and approaches. This book covers conservation issues pertinent to major groups of marine organisms, such as sharks, marine turtles, seabirds and marine mammals; key habitats, from estuaries, wetlands and coral reefs to the deep sea; and from local and regional to international initiatives in marine conservation. An ideal resource for students, researchers and conservation professionals, the book pays appropriate attention to the underlying marine biology and oceanography and how human activities impact marine ecosystems, enabling the reader to fully understand the context of conservation action and its rationale.

Are Dolphins Really Smart? - The mammal behind the myth (Paperback): Justin Gregg Are Dolphins Really Smart? - The mammal behind the myth (Paperback)
Justin Gregg
R297 Discovery Miles 2 970 Ships in 12 - 17 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.

The Killer Whale Who Changed the World (Paperback): Mark Leiren-Young The Killer Whale Who Changed the World (Paperback)
Mark Leiren-Young
R512 R440 Discovery Miles 4 400 Save R72 (14%) Ships in 10 - 15 working days

The fascinating and heartbreaking account of the first publicly exhibited captive killer whale — a story that forever changed the way we see orcas and sparked the movement to save them Killer whales had always been seen as bloodthirsty sea monsters. That all changed when a young killer whale was captured off the west coast of North America and displayed to the public in 1964. Moby Doll — as the whale became known — was an instant celebrity, drawing 20,000 visitors on the one and only day he was exhibited. He died within a few months, but his famous gentleness sparked a worldwide crusade that transformed how people understood and appreciated orcas. Because of Moby Doll, we stopped fearing “killersā€¯ and grew to love and respect “orcas.ā€¯

Small Cetaceans of Japan - Exploitation and Biology (Hardcover): Toshio Kasuya Small Cetaceans of Japan - Exploitation and Biology (Hardcover)
Toshio Kasuya; Edited by William Perrin
R5,610 Discovery Miles 56 100 Ships in 12 - 17 working days

This book summarizes and analyzes the biology, ecology, exploitation and management of small cetaceans in Japan. It describes the various types of cetacean fisheries in Japan and their historical development, the life histories and ecologies of the main species involved, and the history and problems of conservation and management. The data show that in some cases the number of small cetaceans harvested exceed sustainable limits and have led to depletion of populations. The book provides a case study of what can go wrong when the needs of industry and conservation collide. The descriptions of life history and ecology are relevant to issues of conservation and management, not just for cetaceans, but for all fisheries around the world.

Sex, Drugs, and Sea Slime (Hardcover): Ellen Prager Sex, Drugs, and Sea Slime (Hardcover)
Ellen Prager
R851 Discovery Miles 8 510 Ships in 12 - 17 working days

When viewed from a quiet beach, the ocean, with its rolling waves and vast expanse, can seem calm, even serene. But hidden beneath the sea's waves are a staggering abundance and variety of active creatures, engaged in the never-ending struggles of life--to reproduce, to eat, and to avoid being eaten.
With "Sex, Drugs, and Sea Slime," marine scientist Ellen Prager takes us deep into the sea to introduce an astonishing cast of fascinating and bizarre creatures that make the salty depths their home. From the tiny but voracious arrow worms whose rapacious ways may lead to death by overeating, to the lobsters that battle rivals or seduce mates with their urine, to the sea's masters of disguise, the octopuses, Prager not only brings to life the ocean's strange creatures, but also reveals the ways they interact as predators, prey, or potential mates. And while these animals make for some jaw-dropping stories--witness the sea cucumber, which ejects its own intestines to confuse predators, or the hagfish that ties itself into a knot to keep from suffocating in its own slime--there's far more to Prager's account than her ever-entertaining anecdotes: again and again, she illustrates the crucial connections between life in the ocean and humankind, in everything from our food supply to our economy, and in drug discovery, biomedical research, and popular culture.
Written with a diver's love of the ocean, a novelist's skill at storytelling, and a scientist's deep knowledge, "Sex, Drugs, and Sea Slime" enchants as it educates, enthralling us with the wealth of life in the sea--and reminding us of the need to protect it.

Sex, Drugs, and Sea Slime - The Oceans' Oddest Creatures and Why They Matter (Paperback): Ellen Prager Sex, Drugs, and Sea Slime - The Oceans' Oddest Creatures and Why They Matter (Paperback)
Ellen Prager 1
R617 Discovery Miles 6 170 Ships in 12 - 17 working days

When viewed from a quiet beach, the ocean, with its rolling waves and vast expanse, can seem calm, even serene. But hidden beneath the sea's waves are a staggering abundance and variety of active creatures, engaged in the never-ending struggles of life--to reproduce, to eat, and to avoid being eaten.
With "Sex, Drugs, and Sea Slime," marine scientist Ellen Prager takes us deep into the sea to introduce an astonishing cast of fascinating and bizarre creatures that make the salty depths their home. From the tiny but voracious arrow worms whose rapacious ways may lead to death by overeating, to the lobsters that battle rivals or seduce mates with their urine, to the sea's masters of disguise, the octopuses, Prager not only brings to life the ocean's strange creatures, but also reveals the ways they interact as predators, prey, or potential mates. And while these animals make for some jaw-dropping stories--witness the sea cucumber, which ejects its own intestines to confuse predators, or the hagfish that ties itself into a knot to keep from suffocating in its own slime--there's far more to Prager's account than her ever-entertaining anecdotes: again and again, she illustrates the crucial connections between life in the ocean and humankind, in everything from our food supply to our economy, and in drug discovery, biomedical research, and popular culture.
Written with a diver's love of the ocean, a novelist's skill at storytelling, and a scientist's deep knowledge, "Sex, Drugs, and Sea Slime" enchants as it educates, enthralling us with the wealth of life in the sea--and reminding us of the need to protect it.

Whales of the Southern Ocean - Biology, Whaling and Perspectives of Population Recovery (Hardcover, 1st ed. 2019): Yuri Mikhalev Whales of the Southern Ocean - Biology, Whaling and Perspectives of Population Recovery (Hardcover, 1st ed. 2019)
Yuri Mikhalev
R4,126 R3,873 Discovery Miles 38 730 Save R253 (6%) Out of stock

Based on actual data of Soviet whaling, and reliable methodologies that existed at the time when this monograph was written, it examines the distribution and migration patterns of whales of the Southern Ocean. It defines distinct populations on the basis of phenes, as well as whale breeding zones, which are located in the adjacent to the Southern Ocean waters at lower latitudes. The book records the presence of a new species of killer whale in the Southern Ocean - Orcinus nana. Prenatal growth patterns, pregnancy and lactation duration, mean sizes of new-born whales are determined. Methods for the graphic recording of registering structures are described, and an original method for their decoding is proposed to determine animal age. The age of sexual and physical maturity, life expectancy is determined. Earlier unknown "pair formations" on the lower jaw of baleen whales and sperm whales are described, together with their macro, histological and electronic microscopic structure. The impact of the extermination of whales on the Southern Ocean ecosystem is examined, recommendations for control of the current state of whale populations are given, and perspectives of whale population recovery are estimated. Regions that could be used as testing areas for whale registration method are defined. The book is intended for biologist-cytologists, ecologists and other specialists interested in cetaceans, and for biology students.

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