Browsing Master's theses (IHA) by Subject "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922"
Now showing items 21-40 of 41
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Gene expression of the vitellogenins and the receptors during the annual reproductive cycle
(Master thesis, 2016-08-16)Atlantic salmon belongs to the primitive group of protacanthomorph teleost and has two Vtg genes (VtgAsa and VtgAsb) and two VtgR genes (VtgR1 and VtgR2). The focus of our research was to characterize predicted salmon Vtgs ... -
Gene expression responses to bacterial peptidoglycan in Atlantic salmon (Salmo salar) adipocytes enriched with two levels of omega-3 fatty acids and vitamin E
(Master thesis, 2012-06-01)Adipose tissue is recognized as an active endocrine organ, influencing metabolism, inflammation and immunity in mammals. The size of the visceral adipose tissue in farmed Atlantic salmon has increased due to the exposure ... -
Genetic parameters and response to selection for body weight, fillet traits, body size traits and survival in Nile Tilapia (Oreochromis niloticus)
(Master thesis, 2017)This study evaluates the genetic parameters and selection responses in relation to harvest body weight, fillet yield, fillet weight, body size traits (length, depth, thickness) and survival of GenoMar Supreme Tilapia (GST™) ... -
Genetic parameters of a commercial Atlantic cod (Gadus morhua) breeding program
(Master thesis, 2014-02-18)Despite many quantitative genetic studies on Atlantic cod (Gadus morhua) over the last two decades, the magnitude of heritabilities and genetic correlations for some economic important traits (growth rate, carcass quality ... -
Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar)
(Master thesis, 2015-08-07)Genetic parameters and genotype by environment interactions were estimated for early sexual maturity in Atlantic salmon. About 23984 (24999) individuals from 115 (118) full-sib families were tested in six sea-cages at five ... -
Grading of correlated quality traits for added market value in Atlantic salmon (Salmo salar L.) - A model with example data
(Master thesis, 2010-11-29)The quality of the Atlantic salmon (Salmo salar L.) at the time of harvest affects the economic value and is in addition to body weight generally determined by the body composition and carcass quality traits, such as fillet ... -
Influence of dietary tetradecylthioacetic acid (TTA) on lipid content and fatty acid composition in liver of 1+ Atlantic salmon (Salmo salar L.) and sex-specific differences in muscle fat provoked by TTA.
(Master thesis, 2011-11-03)Tetradesyltioeddiksyre (TTA) er en modifisert fettsyre som har vist seg å ha en rekke biologiske og fysiologiske effekter hos pattedyr og fisk. I forsøk med Atlantisk laks (Salmo salar L.) har tilsetting av TTA i fôret ... -
Influence of nutritional factors on muscle development and texture of Atlantic salmon ( Salmo salar L.). In vivo and in vitro studies.
(Master thesis, 2010-11-15)The aim of the present study was to examine the effect of amino acids or bioactive fatty acid on the Atlantic salmon flesh quality with main emphasis on the muscle development and fillets texture by in vivo and in vitro ... -
Krill meal as attractant in plant-based diets for Nile tilapia
(Master thesis, 2013-03-26)Three diets for juvenile Nile tilapia Oreochromis niloticus were prepared substituting 5% of plant protein with products from Antarctic krill (Euphausia superba). Plant material was used as the sole source of protein in ... -
Long-term effect of dietary tryptophan supplementation on the physiological stress response in Atlantic Salmon (Salmo salar)
(Master thesis, 2013-09-10)Several strategies to reduce stress among fish in aquaculture are currently under development. A biologically conserved feature of the stress response in vertebrates is the role of the brain serotonergic (5-hydroxytryptamine, ... -
Mapping of sex-determining candidate genes in Atlantic salmon (Salmo Salar)
(Master thesis, 2011-11-14)Salmo salar (atlantisk laks) er en viktig økonomisk art og er også av interesse innen forskning på grunn av at den er tetraploid. Kromosom 2 og 3 er bevist å være de kjønns-bestemmende kromosomene I atlantisk laks. Målet ... -
Measuring the fat content in intestine of atlantic salmon by using computerized tomography
(Master thesis, 2014-02-19)The aim of our study was to use the CT scanning as a non-destructive method to find out the amount of fat in the Atlantic salmon intestinal area. Farmed Atlantic salmon (Salmo salar) was subjected to computerized X-ray ... -
N-3 fatty acids metabolism in Atlantic salmon
(Master thesis, 2013-07-08)Background: The main human dietary source for n-3 highly unsaturated fatty acids (HUFAs) is fish and seafood. In farmed fish, n-3 HUFA content has been reduced because of increased pressure to replace fish oil by vegetable ... -
Optimal process water supplementation and ratio between corn gluten meal and soy protein concentrate to secure good physical pellet quality and minimize energy use during extrusion processing of fish feed
(Master thesis, 2015-11-05)The objective of this experiment was to find out which combination of water/steam addition and plant protein ingredient mix that gives best physical quality and process economy. The design was, however, restrained by a ... -
Optimizing methods for isolation and in vitro cultivation of primary cardiomyocytes from Atlantic salmon (Salmo salar L.)---A study of cellular responses to hydrogen peroxide, lipo-polysaccharide and docosahexaenoic acid
(Master thesis, 2015-08-18)Atlantic salmon (Salmo salar L.) has been the most produced species in Norway. However, production related losses remain significant recent years, and a large proportion of this were due to viral diseases. Among these ... -
Repeatability of fin length measurements using digital image analysis, and studies of fin morphology and erosion as indicator of social interactions of cod
(Master thesis, 2012-09-20)Fin damage, commonly termed as fin erosion, has been paid considerable attention as a worldwide welfare issue especially in cannibalistic fish species. As cannibalistic fish, Atlantic cod (Gadus morhua) has been showed to ... -
Statistical model comparison in genetic analysis of challenge test data on Streptococcus agalactiae resistance in Nile tilapia (Oreochromis niloticus)
(Master thesis, 2016-08-09)Five statistical models were used to analysis genetic variations, heritability and the ability to predict survival of Nile tilapia based on challenge test data. 12 full-sib Nile tilapia families (1870 individuals) with an ... -
Supplementing a commercial diet for atlantic salmon (Salmo salar L.) with arginine, glutamate or tetradecylthioacetic acid (TTA). impact on production efficiency, slaughter parameters and flesh quality
(Master thesis, 2010-10-28)The present study was carried out to evaluate the effects of supplementing a commercial diets with 1.5% L-arginine, 1.5% L-glutamate or 0.25% tetradecylthioacetic acid (TTA) on feed intake, feed utilization and growth ... -
Sustainability aspects of applying GMOs in aquaculture
(Master thesis, 2012-05-18)Genetic modification technology has been suggested as a way to address challenges in aquaculture and other industries. For instance, the demand for fishmeal and fish oil in aquaculture industry is expected to increase ... -
Sustainable production of high quality Atlantic salmon fillets
(Master thesis, 2013-09-10)The aim of study was to identify the effect of Atlantic salmon (Salmo salar) energy status in the late summer on fat accumulation in the autumn, and to investigate whether it is possible to improve ...