This paper explores the socio-ecological effects of increased aquaculture/farmed fish production, around the island group of Frøya in Trøndelag, Norway, as a result of new licenses accorded to the industry. This is investigated from a stakeholder perspective by assessing the adaptive capacity of selected stakeholder groups through workshops combining Scenario Analysis, Systems Thinking and Bayesian Belief Network and by developing conceptual frameworks and structural diagrams that visualize the perceived effects of the industry on the given stakeholder system.

Namibia's fishing industry is managed using a system of fishing rights and individual fishing quotas. This property rights system was intended to encourage the local fishing industry to exploit the resource responsibly. Unfortunately, unintended perverse incentives have promoted induced overcapacity and inefficient use of vessels. In combination with inconsistent quota allocations, the result has been persistent pressure on the already depleted biological resource. This paper uses a bio-economic model to estimate actual and potential profits in Namibia's hake fishery.

Marine resources have failed to escape the "tragedy of the commons" posed by Hardin (1968). The globalization of economic activity because of trade liberalization is usually pointed as one the factors that explain the decline of marine resources.

Small-scale fishing constitutes the main source of marine products and a central component of local livelihoods for poor families in coastal areas of Costa Rica. This country has been defining marine reserves, and fishermen are believed to be amongst the most prominent opponents of such policies, given the potential costs that entails the lost access of fishing areas of traditional use. However, it seems that this potential economic impact would depend on the livelihoods diversification, and the spatial definition of closures, among others.

We analyzed the reduction in exportation levels of the enterprises which have been working with the Chilean Atlantic Salmon, following the outbreak of ISA virus (ISAv) in 2007. We used a Duration Econometric Model for assessing the risk and survival of the enterprises. Also were determined the factors that explained the reduction of exportation levels, through the Proportional Risk Weibull Model. The results shows that the enterprises affected with ISAv have greater probability of decreasing their exportations.

A bio-socio-economic model was developed to analyze the economic and environmental interactions between the aquaculture activity and artisanal fisheries related to the seed settlement of Mytilus Chilensis that is realized in the Reloncaví Fjord. Meaning by economic interactions the effects of the action of both productivities activities has on the employment and production variables of this sectors. And for environmental interactions the effect that has the aquaculture activity on the seed settlement activity, in terms of the uneaten food pellets (nutrients).

Traditional sectors such as agriculture and fishing often receive special treatment from policymakers because such sectors are perceived to be associated with traditional cultural public good values. However, these values are often difficult to measure and few attempts have been made to do so.