Content and complexity of stakeholders’ mental models of socio-ecological systems

Stakeholders’ interactions with environmental resources are influenced by their mental models of the socio-
ecological system of the environmental resource. Individual differences in such mental models are particularly
important to identify, as diverse mental models may be associated with different behaviour or policy preferences
and affect collaborative conservation efforts. In the present work, we explore stakeholders’ mental models of a
socio-ecological system and assess content and complexity differences across fishing experience levels, migration
status, and regions. We mapped Tanzanian fishers’ (N = 185) mental models of the drivers of the Nile perch stock
fluctuation at Lake Victoria. The findings show that (1) fishers’ mental models were complex and diverse, (2)
mental models focused on the causal influence of destructive fishing activities, (3) mental model complexity, but
not content, varied across regions, and (4) fishing experience and migration status were not consistently related
to mental model complexity or content. These results have important implications for environmental resource
management at Lake Victoria