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Seawater Acclimation And The Thyroidal Response To Thyrotropin In Juvenile Coho Salmon Oncorhynchus Kisutch
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Book Synopsis Seawater-acclimation and the Thyroidal Response to Thyrotropin in Juvenile Coho Salmon (Oncorhynchus Kisutch) by : Jennifer Lee Specker
Download or read book Seawater-acclimation and the Thyroidal Response to Thyrotropin in Juvenile Coho Salmon (Oncorhynchus Kisutch) written by Jennifer Lee Specker and published by . This book was released on 1987 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation Into the Usefulness of Juvenile Coho Salmon (Oncorhynchus Kitsutch) Natural Smolts and Thyrotropin Treated Presmolts for Laboratory Memory Studies by : Joan Lindberg
Download or read book Investigation Into the Usefulness of Juvenile Coho Salmon (Oncorhynchus Kitsutch) Natural Smolts and Thyrotropin Treated Presmolts for Laboratory Memory Studies written by Joan Lindberg and published by . This book was released on 1983 with total page 214 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 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.
Download or read book Sea Grant Abstracts written by and published by . This book was released on 1988 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Powell, James Frederick Francis Publisher :National Library of Canada ISBN 13 :9780315202696 Total Pages :160 pages Book Rating :4.2/5 (26 download)
Book Synopsis Effects of Acid Exposure on the Ion Regulation and Seawater Adaptation of Juvenile Coho Salmon (Oncorhynchus Kisutch) [microform] by : Powell, James Frederick Francis
Download or read book Effects of Acid Exposure on the Ion Regulation and Seawater Adaptation of Juvenile Coho Salmon (Oncorhynchus Kisutch) [microform] written by Powell, James Frederick Francis and published by National Library of Canada. This book was released on 1984 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aquatic Sciences and Fisheries Abstracts by :
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1987-10 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thyroxin Levels in Early Developmental Stages of Coho Salmon (Oncorhynchus Kisutch) by : Louise Kobuke
Download or read book Thyroxin Levels in Early Developmental Stages of Coho Salmon (Oncorhynchus Kisutch) written by Louise Kobuke and published by . This book was released on 1985 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Review written by and published by . This book was released on 1987 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Journal of Fisheries and Aquatic Sciences by :
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1994 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Energetic Response of Juvenile Coho Salmon (Oncorhynchus Kisutch) to Varying Water Temperature Regimes in Northern California Streams by : Wendall Scott Willey
Download or read book Energetic Response of Juvenile Coho Salmon (Oncorhynchus Kisutch) to Varying Water Temperature Regimes in Northern California Streams written by Wendall Scott Willey and published by . This book was released on 2004 with total page 164 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 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 540 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.
Download or read book CSA Neurosciences Abstracts written by and published by . This book was released on 1987 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASFA Aquaculture Abstracts written by and published by . This book was released on 1988 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparative Physiology by : William H. Dantzler
Download or read book Comparative Physiology written by William H. Dantzler and published by . This book was released on 1997 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Swimming Performance and Muscle Function in Juvenile California Salmon by : Shana Michelle Katzman
Download or read book Swimming Performance and Muscle Function in Juvenile California Salmon written by Shana Michelle Katzman and published by . This book was released on 2001 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: