Site fidelity and habitat use of the Guiana dolphin, Sotalia guianensis (Cetacea: Delphinidae), in the estuary of the Paraguaçú River, northeastern Brazil

1. Batista, R.L.G.
2. Alvarez, M.R.
3. dos Reis, M.d.S.S.
4. Cremer, M.J.
5. Schiavetti, A.