Animals At The Extremes Hibernation And Torpor

This 14-hour free course examined the differences between animal hibernation and torpor, such as the triggers for each condition and their physiology.

Hibernation and Torpor in Mammals and Birds explores the physiological factors that control hibernation and torpor in birds and mammals. This text covers topics ranging from metabolism in hibernation to the role of endocrines, respiration and acid-base state in hibernation, and theories of hibernation. This book is comprised of 14 chapters and begins with an overview of some clear-cut definitions and why mammals and birds hibernate. The reader is then introduced to the variations from euthermia that have been observed among birds and mammals. To give some structure to this listing, the approach is phylogenetic, starting with the birds and proceeding through the primitive to the more advanced mammals. Subsequent chapters explains the process of entering hibernation and the hibernating state, itself; capability of a species in natural hibernation to arouse from that state using self-generated heat; physiological changes at the start of a spontaneous arousal; and physiological mechanisms underlying the ability of hibernators to rewarm. Consideration is also given to intermediary metabolism in hibernation, cold adaptation of metabolism in hibernators, and the response of hibernators to various extrinsic influences such as neoplastic growth, radiation injury, and parasitism and symbionts. This book will be of interest to students and researchers in fields ranging from zoology to physiology and biophysics.

Human Physiology in Extreme Environments, Second Edition, offers evidence on how human biology and physiology is affected by extreme environments, also highlighting technological innovations that allow us to adapt and regulate environments. Covering a broad range of extreme environments, including high altitude, underwater, tropical climates, desert climates, arctic climates and space travel, the book also includes case studies that can be used to illustrate practical application. Graduate students, medical students and researchers will find this to be an interesting, informative and useful resource for human physiology, environmental physiology and medical studies. Includes coverage of current global challenges and their consequences on human physiology and performance Presents human physiological challenges in extreme environments Provides an excellent source of information on paleontological and anthropological aspects Offers practical medical and scientific uses of current concepts

Along with reproduction, balancing energy expenditure with the limits of resource acquisition is essential for both a species and a population to survive. But energy is a limited resource, as we know well, so birds and mammals—the most energy-intensive fauna on the planet—must reduce energy expenditures to maintain this balance, some taking small steps, and others extreme measures. Here Brian K. McNab draws on his over sixty years in the field to provide a comprehensive account of the energetics of birds and mammals, one fully integrated with their natural history. McNab begins with an overview of thermal rates—much of our own energy is spent maintaining our 98.6?F temperature—and explains how the basal rate of metabolism drives energy use, especially in extreme environments. He then explores those variables that interact with the basal rate of metabolism, like body size and scale and environments, highlighting their influence on behavior, distribution, and even reproductive output. Successive chapters take up energy and population dynamics and evolution. A critical central theme that runs through the book is how the energetic needs of birds and mammals come up against rapid environmental change and how this is hastening the pace of extinction.

In this book in the Animal Behavior series, discover how, when, where, and why animals hibernate.

Rose Rouse, a journalist, and Suzanne Noble, a serial entrepreneur– created Advantages of Age out of a conversation in a hot tub in 2016. ‘We didn’t like how we were being depicted in the media as we got older.’ Advantages of Age is a social enterprise designed to passionately challenge the prevailing negative stereotypes around ageing. No, we’re not all grandparents, some of us are over 50, single and childless. We don’t wish to be defined by the reductive headlines we see around us. We are writers, filmmakers, singers, press officers, death doulas, psychotherapists and so much more. We are not all retired. We surf, play tennis, lift weights. We have sex, we don’t have sex. We have partners, we don’t have partners. We’re an eclectic bunch. In this collection of essays gathered from seven years of commissioning, AoAers share their thoughts on life, love, sex, death, adventures on their terms, lockdown and everything in between. ‘We hope we’re doing our bit to re-define and re-frame what getting old means.’

This book comprehensively describes biological phenomena, adaptation mechanisms, and strategies of living organisms to survive under extremely cold or desiccated conditions at molecular, cellular, and organ levels. It also provides tremendous potential for applications of the findings to a wide variety of industries. The volume consists of three parts: Part 1, Adaptation Mechanisms of Cold, and Part 2, Adaptation Mechanisms of Desiccation, collect up-to-date research on mechanisms and strategies of living organisms such as sleeping chironomids, polar marine fishes, hibernating mammals, bryophytes, dormant seeds, and boreal plants to survive under extreme cold and desiccated conditions at molecular, cellular, and organ levels. Part 3, Application Technologies from Laboratory to Society, covers various applications to a wide variety of industries such as the medical, food, and agricultural and life science industries. For example, biological knowledge of how plants and animals survive under cold, drought, and desiccated conditions may provide a hint on how we can improve crop production in a very fragile environment in global climate change. Unique molecules that protect cells during desiccation and freezing such as trehalose and antifreeze protein (AFP) have potential for use to preserve cells, tissues, and organs for the long term under very stable conditions. In addition, the current progress of supercooling technology of cells may lead us to solve problems of cellular high sensitivity to freezing injury, which will dramatically improve the usability of these cells. Furthermore, knowledge of water substitution and glass formation as major mechanisms for formulation designs and new drying technologies will contribute to the development of food preservation and drug delivery systems under dry conditions. Written by contributors who have been conducting cutting-edge science in related fields, this title is recommended to a wide variety of readers who are interested in learning from such organisms their strategies, mechanisms, and applications, and it will inspire researchers in various disciplines.

This book provides an intriguing look at how life can adapt to many different extreme environments. It addresses the limits for life development and examines different strategies used by organisms to adapt to different extreme environments.