Who is calling? Intraspecific call variation in the dendrobatid frog Allobates femoralis

Herbert Gasser, Adolfo Amézquita, Walter Hödl

    Veröffentlichungen: Beitrag in BuchBeitrag in Konferenzband

    Abstract

    Many territorial species respond less aggressively to familiar neighbours than to unfamiliar floating strangers based on individual differences in acoustic signals. This form of social recognition, termed neighbour-stranger discrimination (NSD) or dear enemy phenomenon has been reported so far from three anuran species. As a first step to investigate possible neighbour-stranger discrimination in another territorial frog species, we determined patterns of within-male and between-male variability in the advertisement call of the dendrobatid frog Allobates femoralis. High territorial stability among males, a main prerequisite for NSD, is known from a Peruvian population and has been recently confirmed in another study on reproductive success in Brazil. We examined 285 calls from 19 males to assess those call properties showing sufficient and reliable inter-individual differences to function as possible recognition cues. Beside calls per call bout and call rate, all other examined call properties were more variable among males than within males. Generally, temporal call features showed a higher between-male than within-male variability than spectral properties and contributed mostly to separate individual males in the discriminant function analysis. Mean classification success of 64.9% correctly assigned calls to individual males is mainly attributable to three temporal call properties. Altogether, our results suggest that there is sufficient variation in the advertisement call to discriminate statistically among individual males. However, assessed call differences between A. femoralis males were quite small, suggesting that potential neighbour-stranger discrimination might be based rather on a combination of call features or even on the whole pattern of individual call variation instead on single call properties.
    OriginalspracheEnglisch
    Titel14th European Congress of Herpetology, Research Center in Biodiversity and Genetic Resources (CIBIO), Portugal
    Herausgeber (Verlag)Unknown publisher
    Seiten74-74
    Seitenumfang1
    PublikationsstatusVeröffentlicht - 2007
    Veranstaltung14th European Congress of Herpetology - Porto, Portugal
    Dauer: 19 Sep. 200723 Sep. 2007
    http://webpages.icav.up.pt/pessoas/herpmeeting/Herpmeeting_home.htm

    Konferenz

    Konferenz14th European Congress of Herpetology
    Land/GebietPortugal
    OrtPorto
    Zeitraum19/09/0723/09/07
    Internetadresse

    ÖFOS 2012

    • 106054 Zoologie

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