Viser treff 1-10 av 18
Atlantic salmon type I interferons - induction and antiviral activity
(Doctoral thesis; Doktorgradsavhandling, 2013-03-22)
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 ...
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 ...
Improving the size selectivity of the inshore trawl fishery of Nha Trang city, Khanh Hoa province, Vietnam.
(Doctoral thesis; Doktorgradsavhandling, 2013-10-30)
Trawling is an important fishing method used by the inshore fishermen of Nha Trang city, Khanh Hoa province, Vietnam. The inshore trawl fishery in Nha Trang city is known to have very low selectivity, which may not be a responsible fishing practice. The trawl nets of the fishery retain large numbers of juvenile individuals, which has negative effects on the marine resources. The goal of this thesis ...
The influence of snow cover and cold-season temperatures on growing-season processes Ecosystem respiration, nutrients, plant growth and phenology in the high Arctic
(Doctoral thesis; Doktorgradsavhandling, 2013-10-28)
My thesis ‘The influence of snow cover and cold-season temperatures on growing-season processes’ is treating the ongoing trend and future projections of increasing snow cover thickness during the Arctic winter. More snow means two things: warmer soils during winter and later melt-out in spring. Both are important changes for Arctic terrestrial ecosystems, since warmer soils will increase CO2 emissions ...
PLGA (poly(D,L-lactic-co-glycolic)acid) particles as DNA carriers in Atlantic salmon (Salmo salar L.)
(Doctoral thesis; Doktorgradsavhandling, 2013-04-25)
Adjuvanter benyttes for å styrke/bedre immunresponsen ved vaksinering. PLGA (poly(lactic-co-glycolic)acid) er en biologisk nedbrytbar polymer som innehar adjuvantegenskaper når den benyttes i form av partikler. Som vaksinebærere kan partikler beskytte mot nedbryting, stimulere inflammatoriske immunresponser og initiere adaptive immunresponser. Partikler er også vist å gi økt opptak i ulike celletyper. ...
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. ...
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 ...
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 ...