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Some Physiological Changes In Coho Salmon Oncorhynchus Kisutch During Smoltification And Seawater Adaptation
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Book Synopsis Some Physiological Changes in Coho Salmon (Oncorhynchus Kisutch) During Smoltification and Seawater Adaptation by : Leroy C. Folmar
Download or read book Some Physiological Changes in Coho Salmon (Oncorhynchus Kisutch) During Smoltification and Seawater Adaptation written by Leroy C. Folmar and published by . This book was released on 1979 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Changes in Intestinal Fluid Transport Associated with Smoltification and Seawater Adaptation in Coho Salmon (Oncorhynchus Kisutch) by : Nathan Lloyd Collie
Download or read book Changes in Intestinal Fluid Transport Associated with Smoltification and Seawater Adaptation in Coho Salmon (Oncorhynchus Kisutch) written by Nathan Lloyd Collie and published by . This book was released on 1981 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physiological Changes Associated with the Diadromous Migration of Salmonids by : Helga Rachel Høgåsen
Download or read book Physiological Changes Associated with the Diadromous Migration of Salmonids written by Helga Rachel Høgåsen and published by NRC Research Press. This book was released on 1998 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents and discusses present knowledge concerning the diadromous migration of salmonids. It groups elements ranging from ecology to cell biology, to provide the reader background knowledge for critical understanding of published literature and for design of experiments.
Book Synopsis Aspects of Growth Hormone in the Physiology of Smoltification and Seawater Adaptations of Coho Salmon, Oncorphynchus Kisutch [microform] by : Ruston Mathew Sweeting
Download or read book Aspects of Growth Hormone in the Physiology of Smoltification and Seawater Adaptations of Coho Salmon, Oncorphynchus Kisutch [microform] written by Ruston Mathew Sweeting and published by National Library of Canada. This book was released on 1989 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hormones and Osmoregulation in Developing Coho Salmon (Oncorhynchus Kisutch) by : Nurney Harold Richman
Download or read book Hormones and Osmoregulation in Developing Coho Salmon (Oncorhynchus Kisutch) written by Nurney Harold Richman and published by . This book was released on 1985 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hormonal and Osmoregulatory Aspects of Smoltification in Coho Salmon, Oncorhynchus Kisutch by : Jennifer Lee Specker
Download or read book Hormonal and Osmoregulatory Aspects of Smoltification in Coho Salmon, Oncorhynchus Kisutch written by Jennifer Lee Specker and published by . This book was released on 1980 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho salmon smolts (Oncorhynchus kisutch) were transported at low and high densities. (12 and 120 g/L) for short and long periods (4 and 12 h). Because smolts can be transplanted directly to seawater, half of the fish in each treatment were transported to tanks containing seawater and half to tanks containing freshwater. Plasma corticosteroids and glucose were elevated at unloading in all groups. Corticosteroids were still above the resting levels 24 h later, whereas glucose had returned to basal levels at this time. Potential smoltification indicators such as plasma thyroxin concentration and gill Na-K-ATPase activity were not affected by transportation. Increased corticosteroids were correlated to increased mortality in transported salmon compared to acclimated control fish when subjected to a bioassay of stress severe confinement. It is concluded that transportation induced stress in the fish regardless of hauling regimen, that increased corticosteroids may have potential as indicators of reduced performance capacity, that the greatest stress occurred during loading and the first few hours en route, and that transported coho salmon smolts seem to be equally fit for entry into freshwater or seawater. Hormones of the hypothalamic-pituitary system probably mediate the environmental changes and endogenous rhythms that regulate the timing and physiological alterations of smoltification. Because thyroid hyperactivity is a major endocrine component of smoltification, yearling coho salmon were injected with mammalian prolactin (PRL) and thyrotropin (TSH) to determine their effect on plasma thyroxin concentrations. The response of plasma thyroxin to TSH is similar from January through May in coho salmon, suggesting that the thyroid does not change in sensitivity to TSH. A dose of 0.04 to 0.07 I.U. TSH is the minimum dose sufficient to significantly increase plasma thyroxin concentration. PRL (1 to 9 I.U.) depressed plasma thyroxin levels in coho salmon parr, smolts, and post-smolts. Increased plasma thyroxin and gill Na-K-ATPase levels tentatively are considered indicative of smoltification, migratory readiness, and hence, seawater adaptability. In an experiment to consider a methodology which could be implemented at a culture facility to enhance the survival of ocean-going smolts and perhaps mitigate losses due to stunting, an abnormality of smoltification, coho salmon parr were maintained for 3 wk in water supplemented with sodium or calcium salts. Prolonged residence in sodium - supplemented freshwater increased plasma thyroxin levels and tended to elevate gill Na-K-ATPase activity. In contrast, acute exposure (24 h) to 75% seawater halved plasma thyroxin levels in coho salmon parr. Gradual acclimation to increased ambient salinity may accelerate changes in, or enhance, plasma thyroxin levels and gill Na-K-ATPase activity, and thus potentially improve the growth and survival of outmigrating smolts and reduce losses due to stunting. Plasma corticosteroid levels were determined during smoltification and in response to mammalian PRL and TSH. The interrenal tissue, which synthesizes corticosteroids, becomes hyperactive during smoltification. Exogenous PRL and TSH have no effect on plasma corticosteroid levels at any time during smoltification. Plasma corticosteroid levels increase eight-fold between early April and late May in coho salmon, concurrent with increasing gill Na-K-ATPase and seaward migration. Generally, plasma levels of thyroxin and corticosteroids are related inversely. Thyroxin levels are maximum in early April, with the onset of silvering, and corticosteroids are at minimal concentrations at this time. Thereafter, thyroxin levels decline and corticosteroids increase.
Book Synopsis Effects of copper and zinc on smoltification of coho salmon by : Harold W. Lorz
Download or read book Effects of copper and zinc on smoltification of coho salmon written by Harold W. Lorz and published by . This book was released on 1977 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physiological Ecology of Pacific Salmon by : Cornelis Groot
Download or read book Physiological Ecology of Pacific Salmon written by Cornelis Groot and published by UBC Press. This book was released on 2010-10-01 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every year, countless juvenile Pacific salmon leave streams and rivers on their migration to feeding grounds in the North Pacific Ocean and the Bering Sea. After periods ranging from a few months to several years, adult salmon enter rivers along the coasts of Asia and North America to spawn and complete their life cycle. Within this general outline, various life history patterns, both among and within species, involve diverse ways of exploiting freshwater, estuarine, and marine habitats. There are seven species of Pacific salmon. Five (coho, chinook chum, pink, and sockeye) occur in both North America and Asia. Their complex life histories and spectacular migrations have long fascinated biologists and amateurs alike. Physiological Ecology of Pacific Salmon provides comprehensive reviews by leading researchers of the physiological adaptations that allow Pacific Salmon to sustain themselves in the diverse environments in which they live. It begins with an analysis of energy expenditure and continues with reviews of locomotion, growth, feeding, and nutrition. Subsequent chapters deal with osmotic adjustments enabling the passage between fresh and salt water, nitrogen excretion and regulation of acid-base balance, circulation and gas transfer, and finally, responses to stress. This thorough and authoritative volume will be a valuable reference for students and researchers of biology and fisheries science as they seek to understand the environmental requirements for the perpetuation of these unique and valuable species.
Book Synopsis A Study to Assess Status of Smoltification and Fitness for Ocean Survival of Chinook, Coho, and Steelhead by :
Download or read book A Study to Assess Status of Smoltification and Fitness for Ocean Survival of Chinook, Coho, and Steelhead written by and published by . This book was released on 1979 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physiology of Developing Fish: Viviparity and Posthatching Juveniles by :
Download or read book The Physiology of Developing Fish: Viviparity and Posthatching Juveniles written by and published by Academic Press. This book was released on 1988-04-15 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: FROM THE PREFACE: Dramatic changes occur in the physiology of most animals during their development. Among the vertebrates, birds are entirely oviparous, live for variable periods in a cleidoic egg, and show fundamental alterations in excretion, nutrition, and respiration at the time of hatching. In contrast, the eutherian mammals are all viviparous, depend on the maternal circulation and a specialized placenta to provide food, exchange gases, and discharge wastes. The physiology of both mother and fetus is highly specialized during gestation and changes fundamentally at the time of birth. Fishes exemplify both the oviparous and the viviparous modes of development, with some examples that are intermediate between the two. In these two volumes, selected reviews of many, but not all, aspects of development are presented. The chapters in Part A relate to the physiology of eggs and larvae; those in Part B concern viviparity and the physiology of posthatching juvenile fishes.
Book Synopsis Effects of Several Metals on Smolting of Coho Salmon by : Harold W. Lorz
Download or read book Effects of Several Metals on Smolting of Coho Salmon written by Harold W. Lorz and published by . This book was released on 1978 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NOAA Technical Report NMFS. written by and published by . This book was released on 1984 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fish Physiology: Euryhaline Fishes by : Stephen D. McCormick
Download or read book Fish Physiology: Euryhaline Fishes written by Stephen D. McCormick and published by Academic Press. This book was released on 2013-01-11 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for ion and water homeostasis is common to all life. For fish, ion and water homeostasis is an especially important challenge because they live in direct contact with water and because of the large variation in the salt content of natural waters (varying by over 5 orders of magnitude). Most fish are stenohaline and are unable to move between freshwater and seawater. Remarkably, some fishes are capable of life in both freshwater and seawater. These euryhaline fishes constitute an estimated 3 to 5% of all fish species. Euryhaline fishes represent some of the most iconic and interesting of all fish species, from salmon and sturgeon that make epic migrations to intertidal mudskippers that contend with daily salinity changes. With the advent of global climate change and increasing sea levels, understanding the environmental physiology of euryhaline species is critical for environmental management and any mitigative measures. This volume will provide the first integrative review of euryhalinity in fish. There is no other book that focuses on fish that have the capacity to move between freshwater and seawater. The different challenges of salt and water balance in different habitats have led to different physiological controls and regulation, which heretofore has not been reviewed in a single volume. Collects and synthesizes the literature covering the state of knowledge of the physiology of euryhaline fish Provides the foundational information needed for researchers from a variety of fields, including fish physiology, conservation and evolutionary biology, genomics, ecology, ecotoxicology, and comparative physiology All authors are the leading researchers and emerging leaders in their fields
Book Synopsis Metamorphosis in Fish by : Sylvie Dufour
Download or read book Metamorphosis in Fish written by Sylvie Dufour and published by CRC Press. This book was released on 2012-03-08 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers current data on the two types of fish metamorphoses and their endocrine controls. It will be of interest for fish biologists as well as comparative physiologists and endocrinologists. Metamorphosis is a major developmental phase characterized by morphological and physiological changes. It prepares organisms for a drastic shift in habitat and behavior. Among vertebrates, besides the well-known larval metamorphosis in amphibians, two types of metamorphosis are also described in the life cycle of some fish species. Larval metamorphosis, also called first metamorphosis or true metamorphosis, is encountered in lampreys, representative species of basal vertebrates as well as in some teleost groups, elopomorphs and pleuronectiforms, and possibly also in some other teleost species. Secondary metamorphosis occurs in juveniles of some diadromic migratory teleosts, such as salmons and eels, and compared to larval metamorphosis, involves less drastic morphological changes.
Book Synopsis Recent Advances In Aquaculture by : James Muir
Download or read book Recent Advances In Aquaculture written by James Muir and published by Routledge. This book was released on 2019-06-26 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a tribute to the vigour of research and development in aquaculture that we are able, in a relatively short time, to provide readers with a second volume in this series, which has such a diversity of high calibre research and developments to report. That the first volume was so well received has been a source of great satisfaction to the editors and supported their conviction as to the need for links to join the research laboratory to the fish farm by making current research available to a wider range of potential users.
Book Synopsis Fish Osmoregulation by : Bernardo Baldisserotto
Download or read book Fish Osmoregulation written by Bernardo Baldisserotto and published by CRC Press. This book was released on 2019-05-20 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis NOAA Technical Report NMFS CIRC. by :
Download or read book NOAA Technical Report NMFS CIRC. written by and published by . This book was released on 1982 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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