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Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia

Stridulation by stridulatory organs has been linked to tarantulas' (Araneae: Theraphosidae) defence or sexual communication, and the morphology of such organ has been extensively used in tarantula systematics. This study was conducted to characterise and compare differences in the acoustic patt...

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Main Authors: Razak, Irham, Nasir, Dzulhelmi Muhammad, Ahmad, Amirrudin
Format: Article
Published: Penerbit Universiti Kebangsaan Malaysia 2024
Subjects:
QH Natural history
Online Access:http://eprints.um.edu.my/47003/
https://doi.org/10.17576/jsm-2024-5304-01
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spelling my.um.eprints.470032025-01-08T09:11:11Z http://eprints.um.edu.my/47003/ Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia Razak, Irham Nasir, Dzulhelmi Muhammad Ahmad, Amirrudin QH Natural history Stridulation by stridulatory organs has been linked to tarantulas' (Araneae: Theraphosidae) defence or sexual communication, and the morphology of such organ has been extensively used in tarantula systematics. This study was conducted to characterise and compare differences in the acoustic pattern of stridulating sound among seven tarantula species for juveniles and adults of both sexes in Peninsular Malaysia. The species were Psednocnemis jeremyhufz, P. brachyramosa, Selenocosmia sp. `Johor', Omothymus violaceopes, Cyriopagopus robustus, Chilobrachys sp. `Kedah', and Coremiocnemis sp. `Kelantan'. Five provocation methods were used to record the sound which was by tapping the substrate/enclosure, blowing air, waving a pen, poking with blunt object and shaking the enclosure. The stridulating behaviour was assessed using a set of parameters. The result showed that the stridulating behaviour differed between species. Dwarf species like P. jeremyhufz and P. brachyramosa did not make any audible stridulating sound and preferred to remain motionless. Meanwhile, for the other five species only the large adult females stridulated. Adult males of all species did not make any audible sounds, but rather appeared to be more aggressive and frequently bite. Kruskal-Wallis test showed that intensity, pitch frequency, call duration and pulse duration were significantly different between species. Principal component analaysis (PCA) showed the dissimilarity between the adult females from the five species with Omothymus violaceopes and Chilobrachys sp. `Kedah' the most distinct in terms of call patterns. This study provides evidence on the acoustics pattern of stridulating sound for the tarantulas in Peninsular Malaysia. Penerbit Universiti Kebangsaan Malaysia 2024-04 Article PeerReviewed Razak, Irham and Nasir, Dzulhelmi Muhammad and Ahmad, Amirrudin (2024) Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia. Sains Malaysiana, 53 (4). pp. 733-746. ISSN 0126-6039, DOI https://doi.org/10.17576/jsm-2024-5304-01 <https://doi.org/10.17576/jsm-2024-5304-01>. https://doi.org/10.17576/jsm-2024-5304-01 10.17576/jsm-2024-5304-01
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QH Natural history
spellingShingle QH Natural history
Razak, Irham
Nasir, Dzulhelmi Muhammad
Ahmad, Amirrudin
Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia
description Stridulation by stridulatory organs has been linked to tarantulas' (Araneae: Theraphosidae) defence or sexual communication, and the morphology of such organ has been extensively used in tarantula systematics. This study was conducted to characterise and compare differences in the acoustic pattern of stridulating sound among seven tarantula species for juveniles and adults of both sexes in Peninsular Malaysia. The species were Psednocnemis jeremyhufz, P. brachyramosa, Selenocosmia sp. `Johor', Omothymus violaceopes, Cyriopagopus robustus, Chilobrachys sp. `Kedah', and Coremiocnemis sp. `Kelantan'. Five provocation methods were used to record the sound which was by tapping the substrate/enclosure, blowing air, waving a pen, poking with blunt object and shaking the enclosure. The stridulating behaviour was assessed using a set of parameters. The result showed that the stridulating behaviour differed between species. Dwarf species like P. jeremyhufz and P. brachyramosa did not make any audible stridulating sound and preferred to remain motionless. Meanwhile, for the other five species only the large adult females stridulated. Adult males of all species did not make any audible sounds, but rather appeared to be more aggressive and frequently bite. Kruskal-Wallis test showed that intensity, pitch frequency, call duration and pulse duration were significantly different between species. Principal component analaysis (PCA) showed the dissimilarity between the adult females from the five species with Omothymus violaceopes and Chilobrachys sp. `Kedah' the most distinct in terms of call patterns. This study provides evidence on the acoustics pattern of stridulating sound for the tarantulas in Peninsular Malaysia.
format Article
author Razak, Irham
Nasir, Dzulhelmi Muhammad
Ahmad, Amirrudin
author_facet Razak, Irham
Nasir, Dzulhelmi Muhammad
Ahmad, Amirrudin
author_sort Razak, Irham
title Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia
title_short Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia
title_full Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia
title_fullStr Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia
title_full_unstemmed Acoustic Stridulating Responses of Various Tarantula Species in Peninsular Malaysia
title_sort acoustic stridulating responses of various tarantula species in peninsular malaysia
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2024
url http://eprints.um.edu.my/47003/
https://doi.org/10.17576/jsm-2024-5304-01
_version_ 1821105752276729856
score 13.235362

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