Arraut, E.M. Arraut, J.L. Marmontel,M. Mantovani, J.E. Novo, E.M.L. de M. Bottlenecks in the routes of Amazonian manatees and the threat of hydroeletric dams Subjects--Topical Terms: AMAZôNIAPEIXEMIGRAÇÃO ANIMALPRESERVAÇÃO DA NATUREZA