**Acknowledgements**

We thank Energia Sustentável do Brasil S.A., responsible for the construction, maintenance, operation and sale of energy to be generated by the HPP Jirau, for financial support and for providing the data analyzed in the present study as well as Systema Naturae Consultoria Ambiental Ltda., company responsible for implementing the Conservation Program of the Fish Fauna in the area of influence of HPP Jirau. We would like to extend our thanks to all professionals involved with the Subprogram of the Ichthyoplankton, especially André Almeida Uchôa, Andréa Souza Leão, Antônio Cléber Nunes Ferreira, Camila Afonso dos Santos Rosa, Cibelle Mendes Cabral, Cláudia Milena Siqueira Lopes, Fernanda Capuzo Santiago, Ivan VianaTibúrcio, Josmara dos Passos Carvalho, Lívia Naves de Moraes, Luciana Fugimoto Assakawa, Marcio Lima Santos, Marcos Paulo dos Santos Fonseca, Marina Granai, Suzana Silva Peres Rodrigues and Thiago Piassa.
