How did fishing supplement the diet of Gran Chaco peoples?

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distribution of aboriginal South American and circum-Caribbean cultural groups — South American nomad Distribution of aboriginal South American and circum-Caribbean cultural groups.

For the peoples of the Gran Chaco, fishing served as a seasonal supplement to a diet that was primarily based on plant foods, such as those provided by the algarrobo tree.1

While these groups depended heavily on gathering, those who lived near the region's rivers—such as the Paraguay, Pilcomayo, and Bermejo rivers—utilized fish to diversify their nutrition at specific times of the year. Technical methods for harvesting fish included the use of nets, which were created through weaving techniques using netting to transport goods and catch fish. Once caught, fish were typically prepared by being placed directly on coals or cooked in earth ovens lined with heated stones.123