Now showing items 21-30 of 414
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Mechanisms of cataract development in adult Atlantic salmon growers relative to dietary histidine and plant feed ingredients
(The University of Bergen, 2010-03-19)
Cataracts are defined as opacities of the eye lens and can be caused by a large number of risk factors. In aquaculture, cataracts in farmed Atlantic salmon (Salmo salar L.) represent an ethical problem and can cause ...
Growth reaction norms of domesticated, wild and hybrid Atlantic salmon families in response to differing social and physical environments
(BioMed Central, 2013-10-28)
<p>Background: Directional selection for growth has resulted in the 9-10th generation of domesticated Atlantic salmon Salmo salar L. outgrowing wild salmon by a ratio of approximately 3:1 when reared under standard hatchery ...
Male reproductive biology of European hake Merluccius merluccius
(The University of Bergen, 2010-05-14)
The reproductive biology of European hake (Merluccius merluccius) has been studied extensively in the field, but mainly focusing on fecundity regulation in females and its implications for the fishery. The European hake ...
Zooplankton abundance and distribution around on a seamount in the Andaman Sea, Thailand, measured with acoustic methods and biological sampling
(The University of Bergen, 2011-08-30)
Studies of abundance and distribution of zooplankton with acoustic instruments is new methodology in Thailand. In order to evaluate if the zooplankton could be detected and measured, a specific area around a seamount in ...
Extra-pair mating and evolution of cooperative neighbourhoods
A striking but unexplained pattern in biology is the promiscuous mating behaviour in socially monogamous species. Although females commonly solicit extra-pair copulations, the adaptive reason has remained elusive. We use ...
Age determination of Atlantic halibut (Hippoglossus hippoglossus L.) - Size at age and regional growth differences along the coast of Norway
(The University of Bergen, 2011-05-25)
The traditional method for estimating age of Atlantic halibut (Hippoglossus hippoglossus) is through surface readings. Previous studies have not been compared to find the best practice for surface reading techniques. Based ...
Redox regulation in Atlantic cod (Gadus morhua) embryos developing under normal and heat-stressed conditions
With regard to predicted oceanic warming, we studied the effects of heat stress on the redox system during embryonic development of Atlantic cod (Gadus morhua), with emphasis on the glutathione balance, activities of key ...
Genome and low-iron response of an oceanic diatom adapted to chronic iron limitation
(BioMed Central, 2012-07-26)
<p>Background: Biogeochemical elemental cycling is driven by primary production of biomass via phototrophic phytoplankton growth, with 40% of marine productivity being assigned to diatoms. Phytoplankton growth is widely ...
Factors affecting the efficiency and selectivity of the Andaman Sea demersal sampling trawl
(The University of Bergen, 2011-12-05)
The average catch per unit of swept area (CPUE) from bottom trawl surveys by research vessels are used as an index of abundance for the demersal fish resources of the Thai waters of the Andaman Sea. The surveys are ...