Now showing items 181-184 of 184
Food traceability in theory and in practice
(Doctoral thesis; Doktorgradsavhandling, 2018-01-12)
The thesis consists of five papers and a synopsis, and outlines theoretical concepts and practical considerations when implementing traceability in food supply chains. The term traceability and the components of a traceability system are discussed and defined, a method for describing and analysing material flow, information flow, and information loss is outlined, and numerous practical implementations ...
Life history and distribution of the edible crab (Cancer pagurus) in Norway - Effect of temperature and other environmental parameters at high latitudes
(Doctoral thesis; Doktorgradsavhandling, 2019-06-25)
The overall aim of this study has been to provide information on how environmental conditions in Norway might affect the life history and distribution of the edible crab (<i>Cancer pagurus</i>). The results show that the size at which female crabs reach physiological maturity vary little, and just randomly, across northern Europe, and among latitudinally separated areas within Norway. Analysis of ...
Marine food-web structure and community patterns in high-latitude marine ecosystems
(Doctoral thesis; Doktorgradsavhandling, 2016-06-24)
This PhD deals with spatial and temporal community patterns in Barents Sea marine food webs and benthic communities in Svalbard. A main aim of this PhD project has been to study how community and food-web structure changes along environmental and climatic gradients, and to elucidate how species respond to climate warming in the Arctic. We used network analysis to study how the network of who eats ...
Isolation and Charecterization of New secondary metabolites from the Arctic Bryozoans Securiflustra securifrons and Dendrobeania murrayana
(Doctoral thesis; Doktorgradsavhandling, 2019-08-30)
Marine bryozoans is a prolific source of structurally diverse bioactive secondary metabolites. However, the total number of natural products isolated from marine bryozoans is limited, The present study was focused on isolation and characterization of new compounds from Arctic marine bryozoans. The novel compounds were isolated by using two different approaches. For bioassay-guided isolation, fractions ...