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In a previous chapter we have argued that the integrated management of coastal zones should be sensitive to the variety of perceptions that different social actors or stakeholders have on the ecological system being managed (Marın and Delgado, this volume). Our analysis of the economy and social conditions of Aysén suggested us that the main actors, in relation to the Aysén fjord, are: the local government and salmon farmers (Delgado and Bachmann, this volume; Bachmann et al. 2007). Consequently we studied the perception of these stakeholders by means of conceptual PHES-systems models of the Aysén fjord. Since they interact frequently on issues related to its management, we found that it was timely and indeed beneficial for them to know each other’s perception of the ecosystem that generates the services they affect.

The basis and general description of the PHES-system approach can be found in the chapter by Marın and Delgado in this volume, on Marın et al.(2008) and Delgado and Marın (2005). The generation of conceptual models started by sending, two weeks in advance, a short list of questions that would be the basis of the brainstorming sessions. Several questions (eg the effects of fish hatcheries on the water quality of the fjord, the system components of salmon farming, and the effects of salmon on the fjord) were common to both groups for comparative purposes.