return to the sea the life and evolutionary times of marine mammals

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Return To The Sea

Author : Annalisa Berta
ISBN : 9780520270572
Genre : Science
File Size : 63. 59 MB
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"Over the past 55 million years, mammals have returned to the sea many times and in many places. Annalisa Berta leads readers through this parade of transitions, highlighting how marine mammals have met the evolutionary challenge of living an aquatic life in a variety of ways. Return to the Sea weaves ecology, anatomy, and evolution into an ideal entry point for anyone interested in knowing more about one of the most fascinating phenomena in macroevolution."--Nicholas D. Pyenson, National Museum of Natural History, Smithsonian Institution "Berta is to be congratulated. She drew on her vast knowledge of marine mammals and their evolution to write an excellent, readable introduction to the group, including the latest discoveries."--J.G.M. Thewissen, Northeast Ohio Medical University "This wide-ranging and up-to-date survey of marine mammal biology and evolution is a fine introduction to the subject for undergraduates and anyone interested in mammals of the sea."--Daryl P. Domning, Howard University

Return To The Sea

Author : Prof. Annalisa Berta
ISBN : 9780520951440
Genre : Science
File Size : 34. 85 MB
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Return to the Sea portrays the life and evolutionary times of marine mammals—from giant whales and sea cows that originated 55 million years ago to the deep diving elephant seals and clam-eating walruses of modern times. This fascinating account of the origin of various marine mammal lineages, some extinct, others extant but threatened, is for the non-specialist. Set against a backdrop of geologic time, changing climates, and changing geography, evolution is the unifying principle that helps us to understand the present day diversity of marine mammals and their responses to environmental challenges. Annalisa Berta explains current controversies and explores patterns of change taking place today, such as shifting food webs and predator-prey relationships, habitat degradation, global warming, and the effects of humans on marine mammal communities.

Marine Mammals

Author : Annalisa Berta
ISBN : 0080489346
Genre : Science
File Size : 83. 2 MB
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Berta and Sumich have succeeded yet again in creating superior marine reading! This book is a succinct yet comprehensive text devoted to the systematics, evolution, morphology, ecology, physiology, and behavior of marine mammals. The first edition, considered the leading text in the field, is required reading for all marine biologists concerned with marine mammals. Revisions include updates of citations, expansion of nearly every chapter and full color photographs. This title continues the tradition by fully expanding and updating nearly all chapters. * Comprehensive, up-to-date coverage of the biology of all marine mammals * Provides a phylogenetic framework that integrates phylogeny with behavior and ecology * Features chapter summaries, further readings, an appendix, glossary and an extensive bibliography * Exciting new color photographs and additional distribution maps

Squirrels Of The World

Author : Richard W. Thorington, Jr.
ISBN : 9781421404691
Genre : Science
File Size : 78. 38 MB
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Squirrels of the World, written by scientists with more than 100 years of collective experience studying these popular mammals, is the first comprehensive examination of all 285 species of squirrels worldwide. The authors reveal virtually every detail of the family Sciuridae, which includes ground squirrels, tree squirrels, flying squirrels, prairie dogs, and chipmunks. Each species—from the familiar gray squirrel of American backyards to the exotic and endangered woolly flying squirrel of Pakistan—is described in a detailed account that includes distinguishing characteristics, ecology, natural history, conservation status, and current threats to its existence. Squirrels of the World includes • stunning color photographs that document rare and unusual squirrels as well as common varieties• evolution, morphology, ecology, and conservation status• colorful range maps marking species distribution• images of the skull of each genus of squirrel• extensive references -- Lawrence Heaney, Curator and Head of the Division of Mammals, The Field Museum (Chicago)

The Walking Whales

Author : J. G. M. "Hans" Thewissen
ISBN : 9780520959415
Genre : Science
File Size : 47. 83 MB
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Hans Thewissen, a leading researcher in the field of whale paleontology and anatomy, gives a sweeping first-person account of the discoveries that brought to light the early fossil record of whales. As evidenced in the record, whales evolved from herbivorous forest-dwelling ancestors that resembled tiny deer to carnivorous monsters stalking lakes and rivers and to serpentlike denizens of the coast. Thewissen reports on his discoveries in the wilds of India and Pakistan, weaving a narrative that reveals the day-to-day adventures of fossil collection, enriching it with local flavors from South Asian culture and society. The reader senses the excitement of the digs as well as the rigors faced by scientific researchers, for whom each new insight gives rise to even more questions, and for whom at times the logistics of just staying alive may trump all science. In his search for an understanding of how modern whales live their lives, Thewissen also journeys to Japan and Alaska to study whales and wild dolphins. He finds answers to his questions about fossils by studying the anatomy of otters and porpoises and examining whale embryos under the microscope. In the book's final chapter, Thewissen argues for approaching whale evolution with the most powerful tools we have and for combining all the fields of science in pursuit of knowledge.

Marine Mammals Ashore

Author : Joseph R. Geraci
ISBN : 9780977460908
Genre : Marine mammals
File Size : 75. 58 MB
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Marine Mammals Ashore: A Field Guide for Strandings (J.R. Geraci & V.J. Lounsbury)in the hardcover formatis back! A comprehensive manual for understanding and dealing with a stranded seal, manatee, dolphin, whale, or sea otter, this book contains information for the interested beach dweller or student and for the scientist or marine resource manager. Marine Mammals Ashore describes rescue operations, how to organize a response team, and how to deal with the media and the public. It includes basic information on marine mammal biology, life history, and health, and an extensive bibliography.Marine Mammals Ashore also provides stranding network participants with practical guidelines for collecting data and specimens to better understand the biology and behavior of marine animals and the condition of their environment.All chapters have been updated and expanded, with emphasis on topics that include: enhancing network organization, public education, and media relations. natural and human-related mortality in each major marine mammal group. recognizing, responding to, and investigating unusual mortality events. new or updated protocols for specimen and data collection (e.g., samples for PCR analysis; basic guidelines for investigating possible noise-related strandings; collecting environmental data and samples; and a detailed protocol for examining marine mammals for signs of human interactions). zoonoses and other public health issues. updated overview of marine mammal stranding frequency and distribution in North America, with coverage extended to Canada and Mexico. overview of special topics provided by invited authors: disentanglement (Peter Howorth, Santa Barbara Marine Mammal Center, Santa Barbara CA); tagging and monitoring (Anthony Martin, British Antarctic Survey); and GIS applications (Greg Early, A.I.S., Inc., New Bedford, MA). close to 600 new references (and a few new carcass disposal stories!).The 372-page second edition features water- and tear-resistant paper, a vinyl cover, and durable plastic coil binding. There are even strategically placed lined pages for adding personal notes and contact information.

Sensory Evolution On The Threshold

Author : J. G. M. Thewissen
ISBN : 0520252780
Genre : Science
File Size : 25. 48 MB
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Ranging from crocodiles and penguins to seals and whales, this synthesis explores the function and evolution of sensory systems in animals whose ancestors lived on land. It explores the dramatic transformation of smell, taste, sight, hearing, and balance that occurred as lineages of reptiles, birds, and mammals returned to aquatic environments.

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