Søk
Viser treff 1-10 av 71
Sentrum og periferi : Dixit-Stiglitz-Krugman modellen
(Master thesis; Mastergradsoppgave, 2012-04)
SAMMENDRAG
Primærkilden for denne masteroppgaven er; Fujita, Masahisa – Krugman, Paul og Venables, Antony J: ”The Spatial Economy ”, The MIT Press 1999.
Den grunnleggende 2x2x2 Dixit-Stiglitz-Krugman modellen for monopolistisk konkurranse, med 14 koplede likninger, er utviklet ved bruk av gitte data og Dixit-Stiglitz funksjonen – og én optimering. I primærkilden brukes to optimeringer. Fra denne ...
Diett hos Atlantisk laks Salmo salar langs kysten av Finnmark
(Master thesis; Mastergradsoppgave, 2012-02-24)
Atlantisk laks er en anadrom fisk som vokser fra ca 15-50 g til over 25 kg i løpet av den marine fasen, som generelt strekker seg fra 1 til 3 år. Gytevandringen skjer fra de åpne havområdene inn til kysten og tilbake til oppvekstelven. Laksen er en karnivor opportunist som spiser pelagiske byttedyr. Sild, lodde, sil og krepsdyr er ansett som de byttedyrene laksen hovedsakelig spiser når den vandrer ...
Populasjonsstruktur, kjønnsmodning og variasjon i fekunditet hos kongekrabbe (Paralithodes camtschaticus) i Porsangerfjorden, Finnmark : et litteratur- og feltbasert studium
(Master thesis; Mastergradsoppgave, 2012-11-22)
Russiske forskere introduserte kongekrabben, Paralithodes camtschaticus, til Barentshavet på 1960
og 1970-tallet for å gi lokale fiskere en ny art å høste av. Det var antatt at spredning til norske
farvann var lite sannsynlig. Artens etablering ble en suksess sett fra russisk side. Kongekrabben har nå spredt seg over hele kysten av Finnmark fylke, og Porsangerfjorden er den siste av fjordene ...
Seawater consumption in dehydrated hooded seals (Cystophora cristata)
(Master thesis; Mastergradsoppgave, 2012-03)
Studies based on satellite-tracking show that hooded seals (Cystophora cristata) spend many months out in the open sea each year. When the seals are out in the open sea they have no access to fresh water. Experimental studies have showed that hooded seals drink seawater and that they have the capacity to produce urine with Na+ and cl- concentrations equal to or higher than that of seawater. They ...
Adaptive radiation of the European whitefish Coregonus lavaretus (L.) in the Pasvik watercourse: the genetic description of a new morph
(Master thesis; Mastergradsoppgave, 2012-11-26)
Sympatric occurring fish morphs in postglacial lakes usually exhibit differences in morphology and physiology driven by adaptations to differential trophic niches. The European whitefish (Coregonus lavaretus (L.)) is a highly variable fish species, with more than 200 intraspecific forms described in Europe. The morphs usually differ in their number of gill-rakers, therefore this trait has been ...
Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks?
(Master thesis; Mastergradsoppgave, 2012-05)
Outbreaks of defoliating insects periodically cause mass mortality of trees, thereby generating pulses of dead wood resources for saproxylic (i.e. dead-wood dependent) organisms. This study investigated the responses of saproxylic beetles to a dead wood resource pulse caused by recent (2001-2009) outbreaks of geometrid moths in the subarctic mountain birch forest of the Varanger region in northern ...
Repeatability of daily energy expenditure in kittiwakes Rissa tridactyla
(Master thesis; Mastergradsoppgave, 2012-05-15)
Estimates of repeatability (R) are an important statistic tool in assessing the consistency of individual differences and thus different phenotypes. A high repeatability of estimates of the daily energy expenditure (DEE), allow for better inferences of the long term energetic effort of individuals, as well as for sound correlations of other traits related to individual performance, such as reproductive ...
The dually targeted transcription factor TF1 and its role in the expression of plastid- and nuclear-encoded photosynthesis genes
(Master thesis; Mastergradsoppgave, 2012-09-05)
In plant cells, the distribution of genes on three spatially separated subgenomes calls for the necessity of maintaining a coordinated regulation of gene expression between these DNA-containing compartments. Especially, the translocation of nuclear-encoded gene products to plastids and mitochondria, which is crucial for the development and metabolic operation of these semi-autonomous organelles, ...
Effects of various early life history temperature regimes on development and metamorphosis of Atlantic cod (Gadus morhua) larvae
(Master thesis; Mastergradsoppgave, 2012-12-13)
The growth and important structures development in different temperature regime histories were studied during mid-metamorphosis stage of Atlantic cod (Gadus morhua) larvae. In order to see the growth and the organ development differentiation due to different temperatures at a given stage, we exposed the larvae into 4 different temperature regimes; L-L (low temperature at incubation, low temperature ...
Value chain analysis of black tiger shrimp culture in Cox'sBazar District, Bangladesh
(Master thesis; Mastergradsoppgave, 2012-05-22)
This research aimed to explore the value chain of Black tiger shrimp in Cox’sbazar district, Bangladesh. Actors involved in the chain are farmers, wholesalers, commission agents and processors were interviewed by different questionnaires. A total sample size of 48 surveyed households were visited and analyzed for this research. Results showed a map of actors, costs and earnings, employment ...