Agradecimentos: Milena P. Navarro helped with the initial analyses of data. Marco Antonio de Freitas provided the call of S. pauloalvini. Partial funding for acoustical analyses was provided by Ministerio de Ciencia e Innovacion, Spain, projects TATANKA CGL2011-25062, CG

Sympatric species communicating by means of sounds share the same acoustic space, which may cause masking interference affecting the signal recognition processes. This should be especially problematic in congeneric species that tend to exhibit similar aco

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2008/50325-5; 2011/52070-7

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