Bøger i Zoophysiology serien

While we examined the rather surpris ingly modest metabolic rates of arctic warmblooded animals in cold, PER SCHO LANDER proposed and then carried out measurements of metabolism of some tropi cal animals in Panama.

Interest in comparative acid-base physiology has considerably grown during last decades even in the absence of major technical or conceptual advances. However, in accord with differing designs and con straints along animal evolution, varying effector organs and mechanisms are at work to maintain an appropriate acid-base state in the organism.

Fish migration is important and spectacular. We now understand some of the timing and guiding stimuli used in these migrations, and mechanisms can be logically proposed, on the basis of the established abilities of fishes, to account for the unexplained portions of the migrations.

This is partly because of the limited number of variables explored in a given study, but it is also attributable to differences in experimental design, differences among species in susceptibility to hypoxia, nonstandardized experimental conditions, lack of proper control of physical (e.

Noone who has seen a 20-kilogram salmon fling itself into the air repeatedly until it is exhausted in a vain effort to surmount a waterfall can fail to marvel at the strength of the instinct that draws the salmon upriver to the stream where it was born.

What he meant by this question was whether the fields of cellular physiology and physiology of the various organ systems had become so large that physiology as such had vanished.

The major emphasis is on field studies, since my main concern is with adaptive solutions to problems, and I believe these are most likely to be correctly perceived by workers who are familiar with the natural ecological setting of their animals.

With the increasing numbers of research workers and groups of investigators devoting themselves to the ecology of carabids I felt that the time had come to take stock of the existing knowledge in this field and to endeavour to weld my personal results and those of other workers into a comprehensive picture.

Writers on arthropod water relationships range from bio physicists and biochemists to population ecologists-a fact that gives cause to wonder whether the field is already too heterogeneous to be written about in a single book by a single author.

This book has been written mostly within sight of wild African ungulates, at the research center in Tsavo East National Park, V oi, Kenya. Readers may also notice a considerable geographical bias in favor of East Africa, at the expense of other African regions, particularly South Africa.

Predation is an ecological factor of almost universal importance for the biol ogist who aims at an understanding of the habits and structures of animals.

Studies on cuticle demand a variety of techniques, and examples of the following are illustrated in this book (fluorescence, phase contrast, polariza tion and Nomarski interference microscopy; optical diffraction, high angle X-ray diffraction, low angle X -ray diffraction and selected area electron diffraction).

The Amazon is a giant piece of "amphibian" land which is the result of complex geological and evolutionary processes. We hope that this book is useful for comparative physiologists, tropical biologists, and the people interested in interactions between organ isms and their environment.

The nervous system is usually involved in repair of other body systems and often may itself require repair.

Biological effects of magnetic fields have been studied in many animals and plants.

Indeed, the predictability inherent to these periodic processes has enabled organisms to evolve innate endogenous rhythmic programs that match the environmental cycles and allow, in a variety of different ways, adjustment of biological activities to the cycles of environmental changes.

They effect a part of the gut lumen and function not only as a mechanical protection barrier, but also as an ultrafilter, a barrier to parasites, and as envelopes for fecal pellets. The book is divided into the following themes: - Occurrence - Formation and Structure - Degradation - Chemical Composition - Functions.

KAULENAS V Contents Chapter 1 Introduction . 1 Origin of the Germ Cells and Associated Cells and Tissues . 2 Differentiation of the Efferent Duct System and Associated Structures . 1 The Male System . 2 The Female System . 3 Genetic Control of Sexual Differentiation . 3 Sex Lethal . 4 Genes Controlling Somatic Sexual Differentiation .

This volume provides an account of the biology, behaviour and sophisticated sensory capacities of bony fish that generate electric fields. The phylogenetic relationships of the fish taxa involved are discussed as well as the physiology and anatomy of the electrosensory-motor system.

This book is intended for graduate and undergraduate students as well as professional scientists who want to work with animal flight or to gain some insight into flight mechanics, aerodynamics, energetics, physiology, morpho logy, ecology and evolution.

During my research work on avian oogenesis, I became very much interested in further comparative study of ovarian follicles in vertebrates and thus decided to make comparative, morphological and histochemical studies of ovarian follicles in reptiles, birds and mammals.

This book is not a conventional review of diving physiology. I have followed this planat times in order to aid the reader, who I hope is often an untergraduate or graduate stu dent, the nonspecialist, and the layman, in appreciating to some degree the level of dissatisfaction or skepticism about certain areas of research in diving physiology.

This volume emphasizes the comparative approach to under standing vertebrate renal function. I am convinced that this approach is of particular value in understanding both the details of renal function at the cellular and subcellular levels and the renal role in regulating fluid volumes and solute concentrations.

This monograph evolved from years of research into the auditory pathway and hearing of many species of marsupials.

From a review of the previous edition: "I strongly recommend it as an essential reading and reference book for younger and older workers alike". Nature