scholarly journals Southeast Asian clearwing moths buzz like their model bees

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Marta Skowron Volponi ◽  
Luca Pietro Casacci ◽  
Paolo Volponi ◽  
Francesca Barbero
Keyword(s):  
Slow Motion ◽  
Southeast Asian ◽  
Batesian Mimicry ◽  
Evolutionary Models ◽  
Acoustic Parameters ◽  
Warning Signals ◽  
Visual Model ◽  
Flying Insects

Abstract Background The endless struggle to survive has driven harmless species to evolve elaborate strategies of deceiving predators. Batesian mimicry involves imitations of noxious species’ warning signals by palatable mimics. Clearwing moths (Lepidoptera: Sesiidae), incapable of inflicting painful bites or stings, resemble bees or wasps in their morphology and sometimes imitate their behaviours. An entirely unexplored type of deception in sesiids is acoustic mimicry. We recorded the buzzing sounds of two species of Southeast Asian clearwing moths, Heterosphecia pahangensis and H. hyaloptera and compared them to their visual model bee, Tetragonilla collina, and two control species of bees occurring in the same habitat. Recordings were performed on untethered, flying insects in nature. Results Based on eight acoustic parameters and wingbeat frequencies calculated from slow-motion videos, we found that the buzzes produced by both clearwing moths highly resemble those of T. collina but differ from the two control species of bees. Conclusions Acoustic similarities to bees, alongside morphological and behavioural imitations, indicate that clearwing moths display multimodal mimicry of their evolutionary models.

Batesian mimicry and masquerade

2018 ◽  
Author(s):  
Graeme D. Ruxton ◽  
William L. Allen ◽  
Thomas N. Sherratt ◽  
Michael P. Speed
Keyword(s):  
Batesian Mimicry ◽  
Warning Signals ◽  
Potential Predator ◽  
Bird Droppings ◽  
Palatable Species ◽  
Compare And Contrast

This chapter concerns Batesian mimicry, which is the resemblance of a palatable species to an unpalatable or otherwise unprofitable species. Often these unprofitable models have warning signals, which the mimic has evolved to copy. The chapter also considers another well-known form of deception, namely masquerade, which is the resemblance of a palatable species to the cues of an object of no inherent interest to a potential predator such as leaves, thorns, sticks, stones, or bird droppings. Batesian mimicry and masquerade share many properties, and both can be considered examples of ‘protective deceptive mimicry’. We begin by briefly reviewing some well-known examples of protective deceptive mimicry. We then compare and contrast the various theories that have been proposed to understand them. Next, we examine the evidence for the phenomenon and its predicted properties, and finally we address several important questions and controversies, many of which remain only partly resolved.

The evolution and maintenance of Müllerian mimicry

2018 ◽  
Author(s):  
Graeme D. Ruxton ◽  
William L. Allen ◽  
Thomas N. Sherratt ◽  
Michael P. Speed
Keyword(s):  
Warning Signal ◽  
Batesian Mimicry ◽  
Warning Signals ◽  
Natural Systems ◽  
Müllerian Mimicry ◽  
Shared Ancestry ◽  
Similar Appearance ◽  
Mullerian Mimicry

Müllerian mimicry arises when unpalatable or otherwise unprofitable species evolve a similar appearance. While Batesian mimicry is widely considered to have evolved in palatable prey as a consequence of selection to deceive predators into believing that they are unpalatable, Müllerian mimicry is believed to have arisen as a consequence of selection to spread the burden of predator education through the adoption of a shared warning signal. Müllerian mimics are therefore considered mutualists, collectively reinforcing the protective value of their shared warning signals. We begin by discussing some examples of Müllerian mimicry that cannot be explained simply on the basis of shared ancestry. We then discuss Müller’s explanation in more depth, before presenting evidence that the shared resemblance has arisen for the reason that Müller hypothesized. Finally, we consider some of the predicted and observed properties of Müllerian mimicry systems in detail, including ecological and co-evolutionary phenomena, and consider some common questions that have only been partly resolved. We end by considering the connection between Batesian and Müllerian mimicry, arguing that like many natural systems, the nature of relationships can readily fluctuate from being parasitic to mutualistic and vice versa.

Current Issues: Advanced Digital Technology for Supervising Graduate Clinicians

2010 ◽  
Vol 20 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Glenn Tellis ◽  
Lori Cimino ◽  
Jennifer Alberti
Keyword(s):  
Real Time ◽  
Digital Technology ◽  
Clinical Training ◽  
State Of The Art ◽  
Clinical Skills ◽  
Slow Motion ◽  
Video Capture ◽  
Microsoft Excel ◽  
Clinical Supervisors ◽  
Training And Supervision

Abstract The purpose of this article is to provide clinical supervisors with information pertaining to state-of-the-art clinic observation technology. We use a novel video-capture technology, the Landro Play Analyzer, to supervise clinical sessions as well as to train students to improve their clinical skills. We can observe four clinical sessions simultaneously from a central observation center. In addition, speech samples can be analyzed in real-time; saved on a CD, DVD, or flash/jump drive; viewed in slow motion; paused; and analyzed with Microsoft Excel. Procedures for applying the technology for clinical training and supervision will be discussed.

Rule Invention in the Acquisition of Morphology Revisited

1988 ◽  
Vol 31 (3) ◽  
pp. 425-431 ◽  
Author(s):  
Stephen M. Camarata ◽  
Lisa Erwin
Keyword(s):  
Language Acquisition ◽  
Active Role ◽  
Acoustic Parameters ◽  
Impaired Child ◽  
Language Impaired ◽  
Intensity Parameters ◽  
Suprasegmental Features ◽  
Acoustic Analyses ◽  
Suprasegmental Cues

This paper presents a case study of a language-impaired child who signaled the distinction between English singular and plural using suprasegmental cues rather than the usual segmental form used within the parent language. Acoustic analyses performed within the first study in the paper revealed that the suprasegmental features used to maintain this distinction included various duration, fundamental frequency, and intensity parameters. Acoustic analyses Were also performed on a set of matched two- and four-item plural forms within a second study. The results of these analyses indicated that the same acoustic parameters were used to distinguish two-item plural forms from four-item plural forms. This case of linguistic creativity is offered as further evidence in support of the model of language acquisition that emphasizes the active role children take in the acquisition process. Additionally, the phonological, morphological, and psycholinguistic factors that may contribute to such rule invention are discussed.

How Sexual Objectification Generates Dehumanization in Western and Eastern Cultures

2018 ◽  
Vol 77 (2) ◽  
pp. 69-82 ◽  
Author(s):  
Robin Wollast ◽  
Elisa Puvia ◽  
Philippe Bernard ◽  
Passagorn Tevichapong ◽  
Olivier Klein
Keyword(s):  
Social Perception ◽  
Past Research ◽  
Objectification Theory ◽  
Southeast Asian ◽  
Sexual Objectification ◽  
Intense Pain ◽  
Eastern Cultures ◽  
Theory Research ◽  
Self Objectification ◽  
Asian Sample

Abstract. Ever since Fredrickson and Roberts (1997) proposed objectification theory, research on self-objectification and – by extension – other-objectification has experienced a considerable expansion. However, most of the studies on sexual objectification have been conducted solely in Western populations. This study investigates whether the effect of target sexualization on social perception differs as a function of culture (Western vs. Eastern). Specifically, we asked a Western sample (Belgian, N = 62) and a Southeast Asian sample (Thai, N = 98) to rate sexualized versus nonsexualized targets. We found that sexual objectification results in dehumanization in both Western (Belgium) and Eastern (Thailand) cultures. Specifically, participants from both countries attributed less competence and less agency to sexualized than to nonsexualized targets, and they reported that they would administer more intense pain to sexualized than to nonsexualized targets. Thus, building on past research, this study suggests that the effect of target sexualization on dehumanization is a more general rather than a culture-specific phenomenon.

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