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The function of call alternation in the African reed frog (Hyperolius marmoratus): precise call timing prevents auditory masking
  • T. U. Grafe
  • Biology
  • Behavioral Ecology and Sociobiology
  • 26 March 1996
Results support the notion that the second of two partially overlapping calls was acoustically masked, rendering female painted reed frogs unwilling to approach or unable to locate such calls. Expand
Functions of duetting in the tropical boubou, Laniarius aethiopicus: territorial defence and mutual mate guarding
An unusual response for duetting birds is found in that females often synchronized notes with male solo playback to form precise duets, and the repertoire of duet types is used to fine-tune territorial encounters in a network environment of multiple interactants. Expand
A function of synchronous chorusing and a novel female preference shift in an anuran
  • T. U. Grafe
  • Psychology
  • Proceedings of the Royal Society of London…
  • 22 November 1999
Many chorusing insects and anurans acoustically compete for females under conditions of high background noise produced by conspecifics and have developed a variety of strategies for improving theirExpand
The importance of environmental heterogeneity for species diversity and assemblage structure in Bornean stream frogs.
Different anuran assemblages, that is, leaf litter, canopy and stream communities, follow different assemblage rules and thus are not directly comparable, underline the importance of riparian habitat heterogeneity in pristine forests in structuring anuranassemblages. Expand
Multimodal Signaling in Male and Female Foot-Flagging Frogs Staurois guttatus (Ranidae): An Alerting Function of Calling
Novel observations of foot-flagging in the Bornean ranid frog Staurois guttatus that is temporally linked to advertisement calling are reported and the potential of multimodal signaling for conspecific and heterospecific communication is discussed. Expand
Rapidly evolving traits and the comparative method: how important is testing for phylogenetic signal?
It is shown that the bird song parameters investigated are not correlated to their phylogenetic history, indicating that certain aspects of bird song can be subject to rates of evolution that are much more rapid than speciation events. Expand
Costs and benefits of mate choice in the lek-breeding reed frog, Hyperolius marmoratus
This work investigated two potential direct benefits that females gain from being choosy in the lek-breeding painted reed frog, Hyperolius marmoratus broadleyi: assurance of fertilization and reduction in search costs. Expand
Multimodal Communication in a Noisy Environment: A Case Study of the Bornean Rock Frog Staurois parvus
The Bornean rock frog, S. parvus, has solved the problem of continuous broadband low-frequency noise by both modifying its advertisement call in multiple ways and by using numerous visual signals. Expand
Ultrasonic signalling by a Bornean frog
It is found that this species emits extraordinarily high-frequency calls, a portion of which are comprised entirely of ultrasound, which represents the first documentation of an anuran species producing purely ultrasonic signals. Expand
With a Flick of the Lid: A Novel Trapping Mechanism in Nepenthes gracilis Pitcher Plants
A new trapping mechanism for Nepenthes gracilis is described which has evolved a unique, semi-slippery wax crystal surface on the underside of the pitcher lid and utilises the impact of rain drops to ‘flick’ insects into the trap. Expand