Browsing Department of Biology by Issue Date
Viser 1-20 av 676
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Viral-host interactions: from strain to natural planktonic communities
(The University of Bergen, 2017-10-13)Being the most abundant and diverse entities in planet Earth, viruses are thought to play a relevant role in controlling the composition and diversity in phytoplanktonic microbial communities. Microbial communities sustain ...Doctoral thesis -
Analyse av biomarkører i leverprøver fra atlanterhavstorsk (Gadus morhua) benyttet i et burforsøk i Kollevåg, Askøy kommune
(The University of Bergen, 2017-09-05)Kollevåg er et etablert friluftsområde på vestsiden av Askøy i Hordaland. Området har også i tidsperioden 1930-1975 fungert som et avfallsdeponi for usortert avfall for innbyggere i Bergen kommune. Avfallet ble dumpet ...Master thesis -
Reproductive investment in Atlantic cod off Newfoundland: Contrasting trends between males and females
(Canadian Science Publishing, 2017-08-31)Life history theory predicts selection for higher reproductive investment in response to increased mortality among mature individuals. We tested this prediction over the period from 1978 to 2013 for three populations of ...Journal article -
Mn/Fe reduction in sandy soil during degradation of de-icing chemical: Respiration kinetics and prokaryotic community composition
(The University of Bergen, 2017-08-29)At Oslo airport, Gardermoen, Norway, large quantities of propylene glycol (PG) are used as de-icing fluid during winter, causing high loads of this chemical to infiltrate in surrounding soil during snow melt and increasing ...Master thesis -
Species composition and richness along microtopographical gradient, Hardangervidda National Park, Southern Norway
(The University of Bergen, 2017-08-23)Snow, an effective insulator and a mediator of soil microclimate, determines the abundance and plant species richness patterns in the alpine life zone. The aims of this study are: first, to investigate the species composition ...Master thesis -
The Response of Heterotrophic Prokaryote and Viral Communities to Labile Organic Carbon Inputs Is Controlled by the Predator Food Chain Structure
(MDPI, 2017-08-23)Factors controlling the community composition of marine heterotrophic prokaryotes include organic-C, mineral nutrients, predation, and viral lysis. Two mesocosm experiments, performed at an Arctic location and bottom-up ...Journal article -
Decision-making in a proximate model framework: How behaviour flexibility is generated by arousal and attention
(The University of Bergen, 2017-08-19)Animals must make decisions based on limited information and during a limited amount of time. The time spent exploring possibilities and sampling environmental information, means less time spent at actually gathering and ...Master thesis -
Histochemical characterization of AGD lesions in ballan wrasse (Labrus bergylta)
(The University of Bergen, 2017-07-07)With the increasing problem of sea lice (Lepeoptheirus salmonis) in production of Atlantic salmon (Salmo salar), the use of biological and non-drug treatments, such as cleaner fish, like ballan wrasse (Labrus bergylta) ...Master thesis -
Analyses of bacteriophages to Yersinia ruckeri and the salmon (Salmo salar L.) antibody response to the bacteriophages.
(The University of Bergen, 2017-06-30)New technologies for producing Atlantic salmon like the recirculation aquaculture systems (RAS) have gained popularity, and has overthrown the traditional flow through systems used in the freshwater stages of the Atlantic ...Master thesis -
Effects of rapid temperature changes on Atlantic salmon, Salmo salar, post-smolts
(The University of Bergen, 2017-06-28)Year round production of Atlantic salmon post-smolts in closed or semi-closed systems opens up for use of seawater from different depths, which will permit stocking of fish from closed containment system to the open sea ...Master thesis -
Sources of bias in the RFID tag-recapture data used in the stock assessment of North East Atlantic Mackerel
(The University of Bergen, 2017-06-28)Northeast Atlantic Mackerel (Scomber scombrus) is an immensely valuable fish stock for Norway and several other nations. The dynamic stock is spread throughout many nations, making the stock assessment an effort of large ...Master thesis -
Regulation of appetite and growth of Atlantic salmon (Salmo salar L.) and effect of water oxygen, temperature and dietary energy
(The University of Bergen, 2017-06-27)High water temperature combined with low dissolved oxygen (LO or hypoxia) is one of the most challenging environmental conditions farmed fish experience. The oxygen requirement of fish increases in parallel to this, which ...Doctoral thesis -
The effect of water currents on post-smolt Atlantic salmon, Salmo salar (L.). A welfare approach to exposed aquaculture
(The University of Bergen, 2017-06-27)The future development of Atlantic salmon (Salmo salar L.) aquaculture is limited by the availability of space and suitable environments along coastal areas. Utilising exposed areas is a possible solution to this problem. ...Doctoral thesis -
Documentation of growth and insulin-like growth factor I in Atlantic salmon (Salmo salar) post-smolts reared in large scale semi-closed and open systems
(The University of Bergen, 2017-06-27)Understanding the variation of growth performance in different large scale production scenarios is of great importance to the aquaculture industry to develop efficient rearing procedures for cultured fish. This study ...Master thesis -
The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems.
(The University of Bergen, 2017-06-24)Exposing fish to moderate water currents as a form of exercise is often perceived as positive for fish welfare, growth, muscle development and heart condition. This thesis examines what effect rearing Atlantic salmon ...Master thesis -
Isolation and Characterisation of Shiga Toxin-Producing Escherichia Coli from Norwegian Bivalves
(The University of Bergen, 2017-06-23)Only few studies concerning Shiga toxin-producing E. coli (STEC) detection in coastal environments and bivalves have been reported and there have been no reported outbreaks by STEC from bivalves in the world. The aim of ...Master thesis -
Environmental and biological requirements of post-smolt Atlantic salmon (Salmo salar L.) in closed-containment aquaculture systems
(The University of Bergen, 2017-06-22)Production of Atlantic salmon (Salmo salar L.), exceeds 2 million tonnes globally, and accounts for 90% of the salmon on the market. Presently, the predominant production of post-smolt Atlantic salmon occurs in open sea ...Doctoral thesis -
Phenology and Spatial Dynamics of Cacopsylla melanoneura (Homoptera:Psyllidae) in Western Norway, an Insect Vector for Apple Proliferation
(The University of Bergen, 2017-06-21)In the last decade, the plant disease apple proliferation has caused problems for Norwegian fruit farmers, resulting in smaller and un-tasty apples, rendering them unsellable. The disease is caused by the phytoplasma ...Master thesis -
Hensikter med lekser i biologiundervisning. En kvalitativ studie av læreres begrunnelser for bruk av lekser i biologifagene i videregående skole
(The University of Bergen, 2017-06-20)Using homework is a long tradition within Norwegian schools and in most countries. Homework is not embedded in the Norwegian curriculum and hence most teachers choose if they want to give homework or not. Research shows ...Master thesis -
Testing av vaksinasjonsregimer for rognkjeks, Cyclopterus lumpus, mot Aeromonas salmonicida
(The University of Bergen, 2017-06-16)The salmon louse (Lepeophthheirus salmonis) is currently the most serious problem in Norwegian salmon aquaculture. The increase in prevalence of salmon lice with reduced sensitivity to several different chemicals i.e. ...Master thesis
