Study of the Bioecology of the Mapara (Hypophthalmus marginatus)

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The mapara (H. marginatus) found at the mouth of the Para River up to near the Tucurui dam is popularly known as "Mapara-do-nosso", they live in lentic environments, are smaller, robust and the color of their backs is a lighter gray, while the mapara found both along the course of the Tocantins River above the dam, and in the dam lake (lotic environments), are elongated and narrow with a dark back, they are popularly known as "Paulo Isidorio". It is one of the most traded fish in the Lower Tocantins.