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Variability in the mating calls of the Lusitanian toadfish Halobatrachus didactylus: Cues for potential individual recognition

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Resumo:The mating sounds (boatwhistles) of nesting batrachoidid Halobatrachus didactylus males were recorded in the Tagus Estuary from piers. Thirteen males with 16 boatwhistles per fish were analysed for 20 acoustic features. All variables showed larger between-male than within-male variation and differed significantly among individuals. Discriminant function analyses (DFA) considering seven of these variables assigned 90–100% of boatwhistles to the correct individual, depending on the number of males and number of sounds per male included in the model. The acoustic features that consistently best discriminated individuals were the dominant frequency of the middle tonal segment of the boatwhistle (P2) and dominant frequency modulation, followed by P2 pulse period, amplitude modulation and sound duration. These results suggest the possibility of individual recognition based on acoustic cues.
Autores principais:Amorim, Maria Clara Pessoa
Outros Autores:Vasconcelos, Raquel Ornelas
Assunto:Acoustic communication Batrachoididae Individuality Signal variability Sound production
Ano:2008
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Ispa-Instituto Universitário
Idioma:inglês
Origem:Repositório do Ispa - Instituto Universitário

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