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Hydrophysical characteristics of the northern Norwegian coast and fjords
(Doctoral thesis; Doktorgradsavhandling, 2013-09-12)
It is evident that, both due to the large water volumes they hold and that they stretches from coast to inland, it is to be expected that the northern Norwegian fjords plays an important role in a climatic scientific context. Also generally northern regions are considered as a choke point in the regional as well as the global climate. In my opinion it is therefore surprising to find thorough physical ...
The seasonal migratory behavior of sympatric anadromous Arctic charr and brown trout
(Doctoral thesis; Doktorgradsavhandling, 2013-09-20)
This thesis used acoustic and archival telemetry to study fish migrations within and between freshwater and marine habitats. The main novel finding from this thesis work is that both Arctic charr and brown trout originating from rivers without access to lakes can be found in marine waters also during winter. The physical properties of the freshwater habitat may be the main factor controlling in which ...
Rent creation and distribution-Theory and the Vietnamese small scale purse seine fishery
(Doctoral thesis; Doktorgradsavhandling, 2013-06-14)
In Vietnam, as in many other countries, the fisheries sector plays an important role in securing food, providing livelihood, and promoting economic development. Vietnamese fisheries are characterized by open access, and the number of fishing vessels has increased tremendously over the past years while the harvest growth has slowed down. This seems to indicate that the fisheries have reached the limit ...
Bureaucrats and Boundaries. The changing intersection between experts, local communities and environmental administration in nature protection
(Doctoral thesis; Doktorgradsavhandling, 2013-03-08)
Loss of biodiversity and fragmentation of habitats are two of the world’s persistent environmental problems. This is due to the emerging complexities, uncertainties and questions of societal scale in both defining and resolving the problems. One of the challenges connected to resolving these problems pertains to the divide between the local level, which carries the costs of restrictions and regulations ...
Determinants and effects of moth population dynamics in altitudinal gradients in northern Fennoscandia
(Doctoral thesis; Doktorgradsavhandling, 2013-05-21)
The aim of this PhD-project has been to increase our knowledge of trophic interactions along altitudinal gradients in a system of sympatric, cyclically outbreaking geometrid moth species in sub-arctic, coastal birch forest in northern Norway. The project resulted in four scientific publications; two sub-studies focused on the causal effect of natural enemies on the observed complex spatio-temporal ...
Seabirds, climate and prey. A population study of two seabird species.
(Doctoral thesis; Doktorgradsavhandling, 2013-05-30)
Many seabird populations have declined dramatically over recent decades, and studying the demography and population dynamic in seabird populations is important to gaining a better understanding of causes and mechanisms lying behind such changes and to identify targets for conservation and management. Climate and prey availability are known to affect demography and population dynamics of seabirds. ...
Modelling tourism demand, travel mode choice and destination loyalty
(Doctoral thesis; Doktorgradsavhandling, 2013-05-24)
This dissertation has three simultaneous purposes: (1) to investigate the effects of both economic and non-economic factors on the domestic tourist flow to Khanh Hoa province in the long term and the short term; (2) to examine how the characteristics of domestic tourists and the attributes of travel modes influence tourists’ choice of travel mode to Nha Trang, Khanh Hoa; and (3) to investigate how ...
Oil and gas activity in the high north: Economic opportunities and political dependencies
(Doctoral thesis; Doktorgradsavhandling, 2013-06-07)
The aim of this thesis is to analyze what drives Arctic oil and gas activity, and the political effects of the oil and gas industry in the high north. Based on existing political economy theories, four different articles explore these questions by using different methodological approaches. The main findings are that while the potential for a large increase in Arctic oil and gas output is significant, ...
Investigating coastal ecosystem structure and dynamics using Ecopath mass-balance modelling and stable isotope data
(Doctoral thesis; Doktorgradsavhandling, 2013-06-13)
Marine økosystemer er svært komplekse, og derfor bruker vi modeller for å kunne forenkle og systematisere kompliserte sammenhenger. Slike økologiske modeller brukes i utstrakt grad innen forskning og forvalting. Hva de ulike artene av fisk og krepsdyr spiser er svært viktig å vite for å kunne forstå hvordan artene påvirker hverandre, og dette kan vi finne ut med en liten vevsprøve for å måle stabile ...
Pseudocalanus (Copepoda: Calanoida) of the North Atlantic Ocean : species composition, environmental preferences and phylogeography
(Doctoral thesis; Doktorgradsavhandling, 2013-06-25)
The seven species of the genus Pseudocalanus (Copepoda: Calanoida) are difficult to identify because of very small interspecific, and comparatively large intraspecific, divergence of morphologic and morphometric traits. Thus, despite the fact that Pseudocalanus spp. are among the most abundant metazoans in the world, our knowledge of them at the species level is limited. The main objective of this ...