Diving Seals and Meditating Yogis

Strategic Metabolic Retreats

Author: Robert Elsner

Publisher: University of Chicago Press

ISBN: 022624704X

Category: Science

Page: 192

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The comparative physiology of seemingly disparate organisms often serves as a surprising pathway to biological enlightenment. How appropriate, then, that Robert Elsner sheds new light on the remarkable physiology of diving seals through comparison with members of our own species on quests toward enlightenment: meditating yogis. As Elsner reveals, survival in extreme conditions such as those faced by seals is often not about running for cover or coming up for air, but rather about working within the confines of an environment and suppressing normal bodily function. Animals in this withdrawn state display reduced resting metabolic rates and are temporarily less dependent upon customary levels of oxygen. For diving seals—creatures especially well-adapted to prolonged submergence in the ocean’s cold depths—such periods of rest lengthen dive endurance. But while human divers share modest, brief adjustments of suppressed metabolism with diving seals, it is the practiced response achieved during deep meditation that is characterized by metabolic rates well below normal levels, sometimes even approaching those of non-exercising diving seals. And the comparison does not end here: hibernating animals, infants during birth, near-drowning victims, and clams at low tide all also display similarly reduced metabolisms. By investigating these states—and the regulatory functions that help maintain them—across a range of species, Elsner offers suggestive insight into the linked biology of survival and well-being.
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Encyclopedia of Marine Mammals

Author: Bernd Würsig,J.G.M. Thewissen,Kit M. Kovacs

Publisher: Academic Press

ISBN: 0128043814

Category: Science

Page: 1190

View: 7023

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The Encyclopedia of Marine Mammals, Third Edition covers the ecology, behavior, conservation, evolution, form and function of whales, dolphins, seals, sea lions, manatees, dugongs, otters and polar bears. This edition provides new content on anthropogenic concerns, latest information on emerging threats such as ocean noise, and impacts of climate change. With authors and editors who are world experts, this new edition is a critical resource for all who are interested in marine mammals, especially upper level undergraduate and graduate students, researchers, and managers, and is a top reference for those in related fields, from oceanographers to environmental scientists. Significant content and topic updates, as well as the addition of new topics in such areas as anthropogenic disturbance Visual maps of the oceans and seas mentioned in contributions, helping to place the geographical features described in the text with clear, consistent species illustrations Written to help users learn new information or brush up on a topic quickly, with the references at the end of each entry to help guide readers into more specialist literature
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Marine Mammal Physiology

Requisites for Ocean Living

Author: Michael A. Castellini,Jo-Ann Mellish

Publisher: CRC Press

ISBN: 1482242699

Category: Medical

Page: 356

View: 6329

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Suppose you were designing a marine mammal. What would you need to think about to allow it to live in the ocean? How would you keep it warm? What would you design to allow it to dive for very long periods to extreme depths? Where would it find water to drink? How would you minimize the cost of swimming, and how would it find its prey in the deep and dark? These questions and more are examined in detail throughout this book. Marine Mammal Physiology: Requisites for Ocean Living is the first textbook focused on how marine mammals live in the sea from a physiological point of view. It explores the essential aspects of what makes a marine mammal different from terrestrial mammals, beyond just their environment. Unlike many publications and books that cover these species from almost all perspectives, this textbook takes a step back to focus on the physiological and biochemical characteristics that have allowed these mammals as a group to exploit effectively the marine environment that is so hostile to humans. The chapter topics are grouped into major themes: diving and locomotion, nutrition and energetics, reproduction, sensory systems, and environmental interactions. Each chapter is arranged around a common perspective and theme: the big picture challenge and summary and what is known specifically by order. To aid you even further, the authors include a "Toolbox" section in each chapter where they discuss the newest methods for understanding and working on the physiology of marine mammals.
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Alaska science nuggets

Author: T. Neil Davis

Publisher: University of Alaska Press

ISBN: N.A

Category: Science

Page: 233

View: 2070

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Answers to fascinating scientific questions about Alaska and the North can be found in this collection of more than 400 short articles. Neil Davis is a senior geophysical scientist well known for his clarity, skill, and wit in communicating scientific concepts to the general public.
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Undercurrent

The Private, Exclusive Guide for Serious Divers

Author: N.A

Publisher: N.A

ISBN: N.A

Category: Deep diving

Page: N.A

View: 1705

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E-Book Teaching Pilates for Postural Faults, Illness and Injury

a practical guide

Author: Jane Paterson

Publisher: Elsevier Health Sciences

ISBN: 0702033057

Category: Medical

Page: 284

View: 719

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Pilates is a particularly safe and effective exercise system which aims to strengthen the body in a balanced way by specifically improving the function of the weaker muscle groups. Emphasis is placed on strengthening the muscles of the trunk so that support of the spine increases plus posture and shape improve. The exercises enhance overall flexibility and fitness, improving co-ordination and balance. Muscles are gently stretched and lengthened as the exercises progress and overall body strength improves. describes the underlying principles of the exercises in physical terms describes the treatment of common medical conditions provides a manual for those in the remedial health care professions
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