Study of the Bioecology of the Mapara (Hypophthalmus marginatus)

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.