Now showing items 1-7 of 7
The potential for cooperation in shared fisheries : theory and application to Vietnam's fisheries strategy in the South China Sea
(Doctoral thesis; Doktorgradsavhandling, 2009-06-05)
Since the end of the 20th century, many shared fish stocks throughout the world have been found in extreme danger of collapse. There are many calls for cooperation in utilizing and conserving the shared fish resources including the 1982 UN Convention on the Law of the Sea and the 1995 UN Fish Stock Agreement. This study provides an important rationale for cooperation in utilizing a shared fish stock ...
Essays on the economics of marine protected areas and fisheries management
(Doctoral thesis; Doktorgradsavhandling, 2009-11-20)
Even though the oceans occupy more than 70% of the earth’s surface and 95% of the biosphere (National Research Council, 2001), marine habitats have undergone a substantial decline over the last few decades, and most of which is attributable to fishing. In this regard, marine reserves or marine protected areas (MPAs) are proposed as tools to relieve stresses on marine resources and ecosystems. Despite ...
Studies of infectious pancreatic necrosis virus (IPNV) and immune evasion strategies
(Doctoral thesis; Doktorgradsavhandling, 2009-10-23)
Infectious pancreatic necrosis (IPN) is a highly contagious disease which causes huge economic loss to the salmon farming industry world wide. The causative agent, the IPN virus (IPNV), is a dsRNA, non-enveloped virus with two genomic segments encoding five viral proteins, VP1-VP5. <br>Available vaccines against this disease give only partial protection. In order to optimize vaccine efficacies, ...
Arctic charr (Salvelinus alpinus (L.)), an adequate host to Gyrodactylus salaris (Monogenea)
(Doctoral thesis; Doktorgradsavhandling, 2009-05-26)
Arctic charr is a suitable host to Gyrodactylus salaris, and G. salaris is a non-pathogen to this host species. This parasite is highly pathogenic to Norwegian Atlantic salmon and it has driven most affected salmon populations to extinction. In Troms County in northern Norway, two rivers are infected. These two rivers, Skibotnelva and Signaldalselva, are the northernmost G. salaris infected rivers ...
Green sea urchin (Strongylocentrotus droebachiensis,Müller) in aquaculture: the effects of environmental factors on gonad growth.
(Doctoral thesis; Doktorgradsavhandling, 2009-10-30)
Ved hjelp av eksperimentelle studier har en undersøkt effekten av ulike miljøfaktorer på gonadevekst hos Drøbak-kråkebolle i oppdrett. Dette inkluderer effekten av temperatur, størrelse, sesong, individtetthet og forskjellige vannkvalitetsparametre (O2, CO2, nitritt, ammoniakk) og håndtering på overlevelse, gonadevekst, fôrinntak og fôrutnyttelse. Optimal temperatur for gonadevekst hos voksne ...
Essays on exploitation of natural resources : optimal control theory applied on multispecies fisheries and fossil fuel extraction
(Doctoral thesis; Doktorgradsavhandling, 2009-09-18)
Risk sensitive reproductive strategies : the effect of environmental unpredictability
(Doctoral thesis; Doktorgradsavhandling, 2009-02-13)
A crucial task in ecology is to quantify trade offs between competing demographic processes for experienced by individuals that inhabit unpredictable environments. Perhaps the most widely studied trade off is that between current reproduction and future survival (‘the cost of reproduction’). While experimental studies have been widely used to quantify life history strategies in birds, virtually ...