Abstract
Crabs of the genus Uca Leach, 1814 (Crustacea: Decapoda: Ocypodidae), also called fiddlers crabs, occur in estuaries along the Brazilian coast and through feeding and digging activities, contribute to the regulation of the mangrove ecosystem. In this work we will analyze the dynamics of a community of Uca leptodactyla Rathbun, 1898 and Uca uruguayensis Nobili, 1901 present in estuarine en…