Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Teleost fish"”.
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Tetrachlorobiphenyl metabolism, toxicity, and regulation of cytochrome P50 expression in a marine teleost fish
… (TCB) were examined in the marine fish scup (Stenotomus chrysops), focusing on the interactions between TCB and the CYP 1 A 1 enzyme system. A low TCB dose (0.1 mg/kg) elicited strong and sustained induction of hepatic CYP1A1 mRNA, protein content, and catalytic activity. A high TCB …
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Tetrachlorobiphenyl metabolism, toxicity, and regulation of cytochrome P450 expression in a marine teleost fish
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1995.
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The effect of thyroid hormones an growth and metabolism of two species of teleost fish
… be dependent upon the nutritional status of the fish.
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The effects of natural and anthropogenic stressors on the stress response and tissue-level response in teleost fish
… studies allow for the understanding of how fish are affected in situ, where multiple natural and anthropogenic stressors exist. Using laboratory and field-based experimental design, physiological indices of fish health were measured in fish exposed to natural and anthropogenic stressors in …
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Energy levels and anaerobic endproducts in the brains of two species of teleost fish at death in anoxic water
The brain of fish, as in other vertebrates, is responsible for many functions basic to life and is also thought to be an anoxia-sensitive tissue. Therefore, during anoxia, the maintenance of energy within the brain is of paramount importance to the survival of the animal. Studies concerning energy …
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The Roles of Social Status, Maternal Stress, and Parental Investment in Modulation of Hypothalamic-Pituitary-Interrenal Axis Function in Teleost Fish
In teleost fish, the main glucocorticoid stress hormone, cortisol, is released via the hypothalamic-pituitary-interrenal (HPI) axis. This thesis examined the premise that social status, maternal experience, and reproductive status affect HPI axis function in fish. Social stress in juvenile rainbow …
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Assessing the Effects of Temperature, Feeding Status, and the Microbiome on the Maximal Activities of Several Enzymes Important to Energy Production and Ammonia Detoxification in the Intestines of Teleost Fish
… in the intestines of three species of teleosts: the goldfish, rainbow darter and central stoneroller. In warm-acclimated goldfish, intestinal and branchial tissues were more responsive to feeding, while renal tissues were not affected by digestion or thermal acclimation. This was …
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Silence of the fish: injection of photoswitchable short interfering RNA oligonucleotides into Japanese medaka embryos (oryzias latipes) to photochemically control gene silencing
… Wt and F-siRNAs. Medaka are a small freshwater teleost fish that have a number of desirable features for use as a vertebrate model in gene silencing projects. These attributes include daily spawning, a number of useful genetic strains, a completely sequenced genome, and a transparent egg.
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Mechanics and design of flexible composite fish armor
Inspired by the overlapping scales found on teleost fish, a new composite architecture explores the mechanics of materials to accommodate both flexibility and protection. These biological structures consist of overlapping mineralized plates embedded in a compliant tissue to form a natural flexible …
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Aspects of the biology of Trypanorhynch tapeworms and investigations on their use as biological tags
… found in over 1,000 elasmobranch and teleost fish. This led to a choice of three research topics for more detailed investigations: (i) taxonomic studies on four little-known species and the application of this information to fisheries biology, (ii) life-cycle studies on Grillotia …
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Molecular and Immunohistochemical Identification of a Sodium Hydrogen Exchanger-2C (Nhe2C) Paralog in the Gills of Marine Longhorn Sculpin (Myoxocephalus Octodecemspinosus)
… superfamily (CPA) and are thought to function in fish for maintaining physiological ion concentrations and acid-base balances by excreting excess H+ ions from the body in exchange for Na+ ions. There are many more types of these proteins in teleost fish than in mammals due to putative genome …
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Restoring and enhancing Argonaute2-catalyzed cleavage
… eukaryotic species, but curiously, not in zebrafish. We discovered that RNAi is less effective in zebrafish at least partly because Argonaute2-catalyzed mRNA slicing is impaired. This defect can be traced to two conserved mutations that arose in an ancestor of most teleost fish almost 300 …
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DISPERSAL MECHANISMS OF EMBRYONIC AND LARVAL BURBOT (LOTA LOTA)
<p>Many teleost fish produce planktonic larvae that primarily rely on hydrodynamic forces for dispersal. However, allometric growth patterns and larval behavior also plays a significant role in dispersal. The developmental timeline of dispersal mechanisms in burbot (<em>Lota lota</em>) larvae is …
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Tracing The Origin Of A Lectin-like Antifreeze Protein
… lectin homologs found in three lineages of teleost fish (Cottidae, Clupeiformes and Osmeriformes). Previous work demonstrated that the AFP gene was horizontally transferred from the Atlantic herring to the smelt, and also showed that the herring is not the progenitor species. Questions …
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A study of possible chemical mediators of a hypersensitivity reaction in teleost fishes.
… muscle. A cutaneous anaphylactic reaction in teleost fish has only recently been described and there is little information about the causal mechanisms. As a consequence, this thesis is primarily concerned with the pharmacological mediators of the response and their involvement in the overall …
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Role of 11-ketotestosterone, testosterone, and prolactin in the expression of reproductive behaviors by male bluegill
… androgen hormones regulating reproduction in teleost fish, with reproduction in both types of male bluegill. The second study assessed the role of these androgens in the expression of prespawning and parental care behaviors by parental males. Therefore, the effect of exogenously added 11KT, T, …
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BIOMECHANICS OF AN AMPHIBIOUS FISH: MORPHOLOGY, KINEMATICS, KINETICS, AND MOTOR CONTROL OF THE MANGROVE RIVULUS, KRYPTOLEBIAS MARMORATUS (CYPRINODONTIFORMES)
… being a terrific exemplar. This modern teleost fish has a characteristic-looking fish body plan that does not suggest its ability to efficiently transition from water to land, let alone to locomote once out of the water. I performed many exploratory studies to describe the types of …
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Transient CaMK-II Activation is Necessary for Left-Right Asymmetry in the Zebrafish Embryo
… vesicle (KV) or the embryonic node, in zebrafish and mouse, respectively. Cilia beating within the KV are essential to generate a counterclockwise flow of fluid, which leads to left-sided Ca2+ elevation. Ca2+ is a crucial morphogenic second messenger during vertebrate development. Ca2+ …
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