Food resource partitioning among species of Astyanax (Characiformes: Characidae) in the Lower Iguaçu River and tributaries, Brazil
Suelen F. R. Pini, Milza C. F. Abelha, Elaine A. L. Kashiwaqui, Rosilene L. Delariva, Sergio Makrakis and Maristela C. Makrakis