Advertisement call of Leptodactylus labrosus Jiménez de la Espada, 1875 (Anura, Leptodactylidae): an unusual advertisement call within the L. fuscus group

Abstract:

(Spix, 1824) and L. didymus (Heyer, García-Lopez and Cardoso, 1996), have the first part of their calls with frequency emphasized at lower than 1 kHz, yet they present a strong positive frequency modulation so the second half of the call has the frequency emphasized at over 1 kHz (see Marquez, De La Riva and Bosch, 1995; Heyer et al., 1996; Heyer and Heyer, 2002); the advertisement call of L. caatingae (Heyer and Juncá, 2003) has minimum dominant frequency~ 0.95 kHz, and mean dominant frequency~ 1.42 kHz, whereas in L. labrosus minimum dominant frequency is~ 0.35 kHz, and mean dominant frequency is~ 0.45 kHz. The advertisement call of L. caatingae also differs from that of L. labrosus by the presence of well-defined pulses (Heyer and Juncá, 2003; pulses are absent or ill-defined in L. labrosus). The advertisement call of L. labrosus presents a very slight positive frequency modulation so that the entire call has its frequency emphasized below 1 kHz (on average 0.45 kHz). A proper understanding of the evolution of advertisement calls requires thorough taxon sampling (Ron, 2008). In this context, to study the acoustic evolution of calls of the L. fuscus group it is important to describe the advertisement calls of L. ventrimaculatus because the clade L. labrosus-L. ventrimaculatusappears to be the most basal lineage within the L. fuscus group (Ponssa, 2008). The phylogenetic position of L. labrosus seems to be consistent with the distinctive structure of its advertisement call relative to other members of the

Año de publicación:

2011

Keywords:

Fuente:

google