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Bioacoustic differentiation in Painted frogs (Discoglossus)

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Advertisement calls of the Discoglossus-species D. pictus, D. sardus, D. galganoi, and D. montalentii were studied. In comparison with all other species, the advertisement call of D. montalentii is completely different. The frequency spectrum displays a harmonic structure and resembles a Bombina-call, while advertisement calls of the other Discoglossus species are mostly unharmonious. D. pictus auritus and D. pictus pictus show a great similarity of call patterns. D. galganoi is characterized by the longest call duration. The call of a red-backed Discoglossus with the vague locality "Sardinia", here named "D. spec.", differed substantially from the calls of D. sardus and any other studied specimen. The complex situation regarding the distribution of different Tyrrhenian Discoglossus phenotypes is discussed in this context.

Affiliations: 1: Senefelder Str. 20-22, 5000 Köln 30, FRG; 2: Wittekindstr. 15, 5000 Köln 41, FRG


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