Sökning: "Oncorhynchus mykiss"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden Oncorhynchus mykiss.

1. 1. Dietary L-Tryptophan Suppresses Aggression and Stress Responsiveness in Juvenile Rainbow Trout (Oncorhynchus mykiss) : The Role of Brain Serotonin and Plasma Melatonin

   Författare :Olivier Lepage; Svante Winberg; József Haller; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; serotonin; brain; fish; rainbow trout; Oncorhynchus mykiss; feed; stress; cortisol; melatonin; behaviour; aggression; Biologi; Biology; Biologi;

   Sammanfattning : Juvenile rainbow trout (Oncorhynchus mykiss) fed L-tryptophan (TRP) supplemented feed for 7 days show a suppression of aggressive behaviour along with a reduction in post-stress plasma cortisol levels. However, 3 days of elevated dietary TRP does not have any effects on either aggressive behaviour or post-stress plasma cortisol levels. LÄS MER

3. 2. Stress Coping Strategies in Rainbow Trout (Oncorhynchus mykiss)

   Författare :Joachim Schjolden; Svante Winberg; Felicity Huntingford; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Salmonid fish; Stress coping; Serotonin; Cortisol; Catecholamines; Monoaminoxidase; Tryptophan; Monoamines; Behaviour; Stress; Biologi; Biology; Biologi;

   Sammanfattning : Animals show a great variety in physiological and behavioural responses to stressors. These responses are often bimodally distributed within populations and show consistency on an individual level over time and across situations, which in terrestrial vertebrates have been identified as proactive and reactive stress coping strategies. LÄS MER

4. 3. Studies of immunoglobulin light chains in rainbow trout (Oncorhynchus mykiss): new insight into the evolution of immunoglobulin genes

   Författare :Sirje Timmusk; Greg Warr; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cell and molecular biology; Immunoglobulin genes; gene organization; evolution; comparative immunology; promoter; rainbow trout Oncorhynchus mykiss ; Cell- och molekylärbiologi; Cell and molecular biology; Cell- och molekylärbiologi; molekylär immunologi; Molecular Immunology;

   Sammanfattning : In this thesis, the structure and the expression of immunoglobulin (Ig) light chain genes were studied in rainbow trout and including an evolutionary perspective. A novel Ig light chain locus (IgL2) was identified and characterized. LÄS MER

5. 4. Strategies for Monitoring of Endocrine Disrupting Chemicals in Aquatic Environment

   Författare :Pär Hallgren; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; vitellogenin; Endocrine disruption; alkali-labile phosphate; Carassius carassius; steroid hormones; Oncorhynchus mykiss; membrane exraction; supercritical fluid extraction; GC;

   Sammanfattning : The protein biomarker vitellogenin in fish is discussed alongside alterative strategies for monitoring of endocrine disrupting chemicals. The first objective was to find a cheap, robust and generic method for the quantification of vitellogenin. LÄS MER

7. 5. Leptin endocrinology and energy homeostasis in salmonids

   Författare :Marcus Johansson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Leptin; Leptin binding-protein; Energy homeostasis; Oncorhynchus mykiss; Salvelinus alpinus; Adiposity; Food intake; Fasting; Refeeding; Catabolism; Anorexia;

   Sammanfattning : In salmonids, the physiological role of leptin is not completely elucidated. Nonetheless, the anorexigenic effect of leptin indicates a role in their energy homeostasis. This thesis focuses on advancing the understanding of the involvement of the leptin system in the regulation of energy homeo-stasis and food intake in teleost fish. LÄS MER