Blar i Faculty of Biosciences (BioVit) på emneord "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920"
Viser treff 1-14 av 14
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A quantitative genetic study on the proportion of males in tilapia
(PhD Thesis;2011:63, Doctoral thesis, 2011)Early sexual maturation is one the main constraints in Tilapia farming since early breeding causes stunted growth and large size variability. To circumvent this problem all-male populations are used commercially, and ... -
Developing prediction equation for digestibility of nutrients in faeces from individual atlantic salmon
(Master thesis, 2015-11-19)The purpose of this study was to develop a robust and reliable approach to predict apparent digestibility coefficients of fat and protein of individual Atlantic salmon (Salmo salar), based on multivariate regression models ... -
Development and functions of adipose tissue in Atlantic salmon
(PhD Thesis;2009:42, Doctoral thesis, 2009)The trend in salmon aquaculture is to use feed with high lipid content. In current feeds, energy from lipids can comprise as much as 50% of the total energy, compared to 10% approximately 20 years ago. This change was ... -
Effect of starch source, screw configuration and steam injection on physical quality and color development of extruded fish feed
(Master thesis, 2012-04-23)The study investigated the effect of starch sources, screw configuration, and steam injection on physical quality of extruded fish feed. Pellet durability, water stability and hardness were measured and analyzed. Four ... -
Fillet quality and yield of farmed Atlantic salmon (Salmo salar L.): variation between families, gender differences and the importance of maturation
(Master thesis, 2012-04-27)The aim was to study biometric parameters, yield and fillet quality traits of farmed Atlantic salmon (Salmo salar L.) belonging to the 2008 year class of the breeding nucleus of SalmoBreed AS, Norway. The offspring analyzed ... -
Genetic studies on improvement of striped catfish (Pangasianodon hypophthalmus) for economically important traits
(PhD Thesis;2010:43, Doctoral thesis, 2010)The aim of this study was to find non-invasive methods for measuring fillet weight, fillet yield and fillet fat on striped catfish (Pangasianodon hypophthalmus), to examine the magnitudes of genetic variance and covariance ... -
Genomic responses of salmonids to pathogenic agents and nutritional interventions
(PhD Thesis;2009:43, Doctoral thesis, 2009)Aquaculture exposes salmonid fish to diverse stressors, including pathogens and inadequate nutrition. The identification of molecular basis underlying compromised health and growth caused by these factors is confounded by ... -
Improved nutritional value of fish feed with plant protein ingredients by means of organic acid salts and solid state fermentation
(PhD Thesis;2011:23, Doctoral thesis, 2011)The objective of this work was to improve the nutritional value of plant protein sources to be used in fish feed by means of organic acid salts and solid state fermentation (SSF). Four studies were conducted to determine ... -
Lipostatic regulation experimental provoked in farmed atlantic salmon (salmo salar L.)
(Master thesis, 2013-08-26)The present study was conducted to investigate the influence of various salmon fatty accumulations in the early summer on the growth of Atlantic salmon in the following autumn and if this may be linked to sexual maturation ... -
Molecular studies of Atlantic cod (Gadus morhua) globin genes – functional effects of hemoglobin polymorphisms and their geographical distribution
(PhD Thesis;2011:56, Doctoral thesis, 2011)The phenotypic variation among Atlantic cod hemoglobins and their physiological properties has been of great interest to researchers for several decades, and many cod stocks have been “genotyped” according to the HbI ... -
Morphological and molecular characterization of developing vertebral fusion in altantic salmon (Salmo salar)
(PhD Thesis;2010:26, Doctoral thesis, 2010)Problems with spinal disorders in Atlantic salmon (Salmo salar) have been increasingly in focus due to the importance of this species in the aquaculture industry. Until recently, the molecular development of spinal deformities ... -
Tetradecylthioacetic acid (TTA) – A functional feed ingredient for Atlantic salmon (Salmo salar L.): Growth, sexual maturation and health
(PhD Thesis;2010:23, Doctoral thesis, 2010)Farmed Atlantic salmon (Salmo salar L.) is transferred to sea at different times during the year. Independently of time after sea transfer, the salmon experience a period of low performance, characterized by reduced appetite, ... -
The effect of pancreas disease and salting conditions on the quality of raw and cold-smoked Atlantic salmon (Salmo salar L.)
(PhD Thesis;2011:07, Doctoral thesis, 2011)Fillet quality of farmed Atlantic salmon (Salmo salar L.) is affected by a broad range of preand post-mortem factors. This thesis focuses mainly on the impact of pancreas disease (PD), salt composition and salting method ... -
Upgrading plant ingredients in feed for salmonids by thermo-mechanical treatment and acid salts
(PhD Thesis;2011:52, Doctoral thesis, 2011)Inclusion of plant ingredients in diets for salmonids is restricted due to low energy contents, unbalanced amino acid (AA) composition and presence of antinutritional factors (ANF). The objective of this thesis was to ...