This document discusses using community-based participatory research methods to study fisheries and livelihoods in the Lower Mekong Basin of Laos. It describes applying these methods in Nam Kading River communities to measure fish diversity, the role of wild fish in diets and livelihoods, and total economic value. Local field technicians were trained to collect catch, household consumption, and market data. Results showed high fish species diversity and the importance of wild-caught fish for food. Opportunities and challenges of the approach are discussed, such as improving data accuracy and retaining field technicians.