Browsing Department of Biological Sciences by Subject "751999"
Now showing items 21-40 of 174
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Characterization of benthic communities at Loki’s Castle vent field using a photomosaic
(Master thesis, 2021-08-30)Loki’s Castle was the first black smoker hydrothermal vent field to be discovered on the Arctic Mid-Ocean Ridge (AMOR), and is known to host a specialized and highly endemic fauna. Despite being studied since its discovery ... -
Climate change and the effect of darker coastal water on NCW euphotic zone properties - A theoretical study
(Master thesis, 2016-11-21)The Norwegian Coastal Water (NCW) derives from an extensive outflow of freshwater from the Baltic Sea and river runoff from the Norwegian coast, making the water less saline than the North Atlantic Water (NAW). Freshwater ... -
A climate for seed predation: Precipitation affects seed removal by the major groups of granivores differently across boreal, sub-alpine and alpine grasslands
(Master thesis, 2018-12-15)Granivory, the seed predation by animals, plays an important role for plant and animal populations, and impact species composition and functioning of ecosystems. The intensity in granivory depends on various biotic and ... -
Climate History of the Arctic: temperature reconstruction of an arctic lake on Spitsbergen based on chironomid
(Master thesis, 2010-06-01)ABSTRACT. The increase in global climatic changes seen in recent years is debated to be a result from expanding anthropogenic activity. The aim for the study is to contribute to the climatic history at western Spitsbergen ... -
Cod spawning in the Borgundfjord Marine Protected Area
(Master thesis, 2020-06-27)The Norwegian coastal cod population north of 62°N declined in the years from 1997 to 2005 and has since remained low. The Borgundfjord has since 2009 served as an extractive Marine Protected Area (MPA) for protecting the ... -
Comparative feeding ecology of roundnose grenadier (Coryphaenoides rupestris) in Norwegian fjords
(Master thesis, 2017-06-16)In the ocean, energy is transferred from the productive primary producers at the surface, down to the demersal fish fauna at the sea floor. When moving away from the surface layer, there is a decline in food availability, ... -
A comparison of abundance, distribution and behavior of Northeast Atlantic mackerel (Scomber scombrus L.) during curved and straight forward trawling.
(Master thesis, 2016-06-01)Northeast Atlantic Mackerel (Scomber scombrus) is one of the largest and economically most valuable fish stocks in the world. However, due to a large area of distribution, low acoustic backscatter and highly dynamic and ... -
Cryptic diversity in the leptothecate genera Laodicea and Tiaropsis (Cnidaria: Hydrozoa)
(Master thesis, 2021-09-01)Although they are an ecologically and economically important group of animals, hydrozoans are understudied because of their difficult identification due to their small size and fragility. Hydrozoans as a group show a great ... -
Cultivation and genomics of extremophiles from a deep and hot North Sea oil reservoir
(Master thesis, 2014-10-02)In this study, production water from the Troll B oilfield in the North Sea has been used as a source in order to isolate and characterize new extremophilic prokaryotes. Anaerobic enrichment cultures with different carbon ... -
Decision-making in a proximate model framework: How behaviour flexibility is generated by arousal and attention
(Master thesis, 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 ... -
Dietary lipid modulation of intestinal serotonin in Ballan wrasse- Labrus bergylta – In vitro analyses
(Master thesis, 2018-09-04)Salmon lice infections by Lepeophtheirus salmonis represent one of the biggest challenges for the salmon industry. Intensive use of chemical delousing methods has led to resistance in lice against several of the chemicals, ... -
Different delivery routes of double stranded RNA to obtain RNA Interference in the salmon louse (Lepeophtheirus salmonis)
(Master thesis, 2016-05-31)Lepeophtheirus salmonis (Krøyer 1837), commonly known as the salmon louse, is an ectoparasitic copepod specific to wild and farmed salmonids (Boxaspen, 2006), and probably the most serious problem that the Norwegian ... -
Different production protocols influence smolt physiology and growth in seawater for Atlantic salmon (Salmo salar)
(Master thesis, 2022-06-01) -
Distribution of mesopelagic scattering layer (MSL) in relation to the physical environment in the Norwegian Sea
(Master thesis, 2014-06-02)Mesopelagic fish are considered a major group of fishes in the global oceans and are typically observed in the water as acoustic scattering layers. Their biomass has recently been suggested to be severely underestimated, ... -
Diversity of dsDNA marine viral groups during winter in the Arctic Ocean north of Svalbard
(Master thesis, 2015-10-22)Extreme changes in light and cold water temperatures throughout the annual cycle in the Arctic Ocean create a unique habitat that selects for particular microorganisms - including marine viruses. This study investigated ... -
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
(Master thesis, 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 ...