Osmotic And Ionic Regulation In Polar Fishes

In the 40 years since the classic review of osmotic and ionic regulation written by Potts and Parry, there has been astonishing growth in scientific productivity, a marked shift in the direction and taxonomic distribution of research, and amazing changes in the technology of scientific research" It is indicative of the growth of the subject that as

Volume 22 of the Fish Physiology Series is entirely devoted to fishes of high latitudes (Arctic and Antarctic). Three central themes comprise the book: the uniqueness of the physiology of fishes that live in cold polar environments, a comparative analysis of physiological patterns exemplified by fishes that live poles apart and, how fishes differ from fishes living in more temperate and tropical habitats. Fish Physiology: The Physiology of Polar Fishes highlights the physiological adaptations that evolved to allow certain fish to exploit the frigid, yet productive, Arctic and Antarctic Oceans. The reader will explore what is known, as well as what remains undiscovered, concerning the fish indigenous to both polar regions. This will be of great interest to physiologists, ichthyologists, and comparative biologists researching low temperature biology, fishery scientists, faculty, graduate students. Offers an comparative analysis of the arctic and antarctic polar marine environments Authors answer the question: What is special about the physiology of fish from the stenothermal Arctic and Antarctic environments? Includes nine descriptive chapters, 40 tables and over 80 figures

Devoted to fishes of high latitudes (Arctic and Antarctic). This book includes themes such as: the uniqueness of the physiology of fishes that live in cold polar environments, an analysis of physiological patterns exemplified by fishes that live poles apart, and how fishes differ from fishes living in more temperate and tropical habitats.

Notwithstanding widespread studies and even several biological journals devoted to temperature, it is difficult to perceive a field of thermobiology as such. Interest in the effects of temperature of biological systems is fragmented into specific thermal ranges and often connected with particular applications: subzero cryobiology and preservation of cells and tissues or survival of poikilotherms, para-zero cryobiology and preservation of whole organs and survival of whole animals, intermediate ranges and physiological adaption and regulation, high temperatures and use of heat for killing cancer cells, very high temperatures and limits of biological structure. Yet it has not always been so, and there are good reasons why it need not remain so. General and comparative physiologists such as W.J. Crozier, H. Precht, J. Belehradek, F. Johnson, C.L. Prosser, and others have sought throughout this century to lay foundations for unified approaches to temperature in biological systems.Recent findings also serve to suggest principles and processes that span the range of temperatures of biological interest. Microviscosity of membranes is an issue originally of interest to low temperature biologists but with relevance to limiting high temperatures; conversely for protein structure. Certain "heat shock proteins" now appear to be responses to generalized stress, including low temperature.Inevitably, the chapters of this book reflect the "zonal" character of thermobiology: two chapters (by Storey and Raymond) deal with protection against subfreezing temperatures; three (Hazel, membrane structure, Dietrich, microtubular structure, and Kruuv, cell growth) deal with the effects of and modulation to cool-to-moderate superfreezing temperatures, one (Willis) with modulation (of membrane ion transport) to moderate-to-high temperatures and two (Li, heat shock proteins and Lepock, proteins in general) with stressfully high temperatures. Explicit in each of these chapters, however, are principles and issues that transcend the parochialism of the temperature range under consideration.

Although Antarctic finfish have been exploited for more than two decades and many stocks now appear to be overfished, this is the first detailed account of this fishery. The book begins by giving a comprehensive description of Antarctic fish biology and ecology, the thorough understanding of which is a prerequisite to sound management of the fishery. Subsequent sections consider the course of finfish exploitation and the present state of exploited fish stocks in the Southern Ocean. The author concludes by proposing more effective management methods for the fish resources of the Southern Ocean in light of the Convention on the Conservation of Antarctic Marine Living Resources.

In their very first lecture biochemists learn that biomolecules, namely nucleic acids, proteins and lipids, are extremely temperature sensitive and will denature and lose their function easily. Then how do Archaebacteria survive in hot springs or Antarctic fishes which live in ice-cold water? The way nature engineered subcellular structures, lipid membranes or proteins to meet the biochemical requirements of extreme conditions - like extreme temperature or salt concentrations - is described in Life Under Extreme Conditions.

An essential part of diverse marine ecosystems, seafood organisms are especially vulnerable to changes in their natural habitats that affect their reproductive abilities, growth rate, and mutual inter- and intra-species interactions. Environmental Effects on Seafood Availability, Safety, and Quality Issues discusses a variety of factors, both intri

Fish lives in environments with a wide variety of chemical characteristics (fresh, brackish and seawater, acidic, alkaline, soft and hard waters). From an osmoregulatory point of view, fish have developed several mechanisms to live in these different environments. Fish osmoregulation has always attracted considerable attention and in the last years several studies have increased our knowledge of this physiological process. In this book several specialists have analyzed and reviewed the new data published regarding fish osmoregulation. The chapters present an integrative synthesis of the different aspects of this field focusing on osmoregulation in specific environments or situations, function of osmoregulatory organs, general mechanisms and endocrine control. In addition, interactions of osmoregulatory mechanisms with the immune system, diet and metabolism were also reviewed. New emerging techniques to study osmoregulation has also been analysed.