How Indigenous Aquaculture Is Rebuilding Food Sovereignty in the Amazon
by Timoteo Granzotti
When we first discussed aquaculture with Yawanawá community leaders, the response was not enthusiasm — it was caution. "We have always eaten from the river," one elder told us. "Why would we need ponds?"
When we first discussed aquaculture with Yawanawá community leaders, the response was not enthusiasm — it was caution. "We have always eaten from the river," one elder told us. "Why would we need ponds?"
It was the right question. The river had fed the Yawanawá for thousands of years. The problem was that the river was no longer what it had been. Upstream agricultural runoff, illegal gold mining, and climate-driven changes in rainfall patterns had dramatically reduced fish populations in the Gregório River. A protein source that had been reliable for millennia had become unpredictable.
The aquaculture program grew from that conversation — slowly, collaboratively, and with deep respect for the knowledge systems the Yawanawá already had.
Design Principles: Starting with What They Know
The Western impulse in development work is to arrive with a solution already designed. Our approach was the opposite. We began with a three-month listening process, meeting with elders, fishermen, women's groups, and young people to understand the food system as they experienced it, the stresses they were navigating, and the values that would need to be honored in any new approach.
What emerged was a design philosophy built on three principles: the system must be family-operated (not centrally managed), it must use species the community already knows and values, and it must respect the landscape and water systems with the same care as the river they were supplementing.
The primary species selected were tambaqui (Colossoma macropomum) and pacu (Piaractus mesopotamicus) — both native Amazonian fish that the Yawanawá have fished for generations. Tilapia, often the default choice in aquaculture programs, was considered and rejected because its invasive potential posed risks to the river ecosystem.
The First Five Ponds
The first five ponds were constructed in 2024, each adjacent to a family's existing garden, fed by seasonal rainfall and managed by the family that would eat and sell from it. Construction used local materials and was carried out by community members trained in pond engineering — knowledge they now carry and can share.
Each pond holds approximately 500 fish at any time. The first harvest, in December 2024, yielded 480 kilograms of tambaqui — enough to feed 8 families for three months and generate a modest income from sale of surplus at the nearest market.
The numbers are modest by the standards of industrial aquaculture. But the system is designed for resilience and sovereignty, not maximum yield. Each family now has a food source they control, understand, and can maintain without external technical support. That autonomy is the point.
Integrating Traditional Knowledge
Perhaps the most interesting aspect of the program has been the way Traditional Ecological Knowledge has enriched the aquaculture practice. Yawanawá fishermen had long observed that fish congregate in certain areas of the river based on water temperature, current patterns, and the presence of specific plant species. This observational knowledge, developed over generations, is now being applied to pond management — informing feeding patterns, harvest timing, and the placement of native aquatic plants that serve as habitat and water quality regulators.
One elder, Bira Yawanawá, noted that the tambaqui in the ponds behaved differently than their river counterparts — more sluggish, less vibrant. His observation led to a modification of the feeding regime and the introduction of native aquatic vegetation that mimicked river habitat more closely. Within weeks, the fish behavior had changed noticeably.
This is what the integration of Traditional Ecological Knowledge looks like in practice: not the application of ancient wisdom unchanged, but a dynamic dialogue between deep observational knowledge and new contexts. The elders are not museum pieces. They are active scientists.
The Road to 15 Ponds
Our goal is to reach 15 family-operated pond systems by the end of 2026, covering the full range of the community. At that scale, aquaculture would provide a reliable protein supplement to approximately 80% of Yawanawá families, significantly reducing dependence on increasingly unreliable river fishing.
Your support is directly enabling this expansion. Each pond costs approximately $3,500 to construct and stock. The return — in food security, economic independence, and cultural continuity — is immeasurable.