First they were careful about how they introduced the idea of the community managing their own fishery resources. They made it clear from the start who would be responsible for what, and what Fisheries was prepared to do for the effort. If the villagers did not seem sincere, the team simply got up and left, saying that if the people changed their minds, to get in touch. Most of these unschooled rural villagers know perfectly well that consultants and aid agencies need to have their cooperation. So they apply the old financial lever whenever they can, often with great success.
Government agencies do the same thing to aid agencies but that's another story.
Nothing to do . People get properly concerned over the issues then the government officials, NGO workers, or consultant firm, vanishes and life goes back to the way it was. Along the same line, projects that train officials or NGO personnel in participatory techniques will eventually fail unless they include a strong, primary mandate for the trainer to train others. It's called training the trainers. When this works as it should, the trainers train trainers who train more trainers.