Disease is a primary threat to the continued growth in salmon aquaculture due to its extensive effects on the sector. Aquaculture farms suffer the most direct and immediate economic losses through reduction in growth, low feed efficiency and market prices, increasing mortality rates, and expenditures on prevention and treatment measures....
Crown jellyfish (Periphylla periphylla) has become an increasing biological and economic problem for the fishermen in many Norwegian fjords. It is known to prey on a variety of planktonic species including small crustaceans like krill and calanus as well as fish eggs and larvae. Thus, this jellyfish is both a...
Climate, competition, and disease are well-recognized drivers of population dynamics and can be intertwined by animal migrations with consequences for the ecosystems and economies that depend on them. Sockeye salmon from the Fraser River of British Columbia are one of the most ecologically, economically, and socially important salmon complexes in...
The paper explores to what extent escaped farmed salmon from fish farms affect the willingness-to-pay for recreational fishing of Atlantic salmon in Norwegian rivers. The aim is to quantify the potential externality from escaped farmed species working through the demand for the natural stock of congeners. While the biological and...
Salmon aquaculture generates good output (i.e. salmon) and bad output (e.g., pollution). A joint production function approach is applied to model both outputs simultaneously. Two environmental production
technologies are proposed, namely, regulated and unregulated technologies. Two production function models with different mapping rules in the analysis are used. Pollution abatement...
Sea lice are natural parasites, and are spread between wild salmon stocks and farmed salmon. Studies indicate that sea lice from salmon farms not only cause economic losses to salmon aquaculture producers, but also affect other marine resources. Currently one of the most controversial debates over sea lice from salmon...
This paper is to investigate how climate change affect fisheries resources and economic performance of fishing sector and coastal communities in the Arctic with a focus on Svalbard Fisheries Protection Zone. Climate change is projected to alter the productivity of our oceans, the distribution, abundance, composition, quality and quantity of marine...
This paper explores the optimal management strategies of two species with different life history traits. Here we consider a prey-predator relationship which may represent a resident species and an invasive species. They have different life history traits and interact by competing food and space and predation in the same ecosystem....
The paper is the first attempt to explore the ecological and economic impacts of genetic interaction between farmed and wild salmon over generations. An age- and stage-structured bioeconomic model is developed. The biological part of the model includes age-specific life history traits such as survival rate, fecundity, spawning success for...