Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia

Rattus rattus which is believed to be native to India is easily found in all continents of the world. With the absence of R. rattus from lineage I and the presence of lineage IV in Southeast Asia, little is known about how rodent morphology varies biogeographically. We evaluate the skull morphometri...

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Main Authors:	Nurul Huda Mohamad Ikbal, Dharini Pathmanathan, Subha Bhassu, Khanom Simarani, Hasmahzaiti Oma
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2019
Online Access:	http://journalarticle.ukm.my/14369/ http://journalarticle.ukm.my/14369/ http://journalarticle.ukm.my/14369/1/05%20Nurul%20Huda%20Mohamad%20Ikbal.pdf

id	ukm-14369
recordtype	eprints
spelling	ukm-143692020-03-10T02:21:40Z http://journalarticle.ukm.my/14369/ Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia Nurul Huda Mohamad Ikbal, Dharini Pathmanathan, Subha Bhassu, Khanom Simarani, Hasmahzaiti Oma, Rattus rattus which is believed to be native to India is easily found in all continents of the world. With the absence of R. rattus from lineage I and the presence of lineage IV in Southeast Asia, little is known about how rodent morphology varies biogeographically. We evaluate the skull morphometrics in the population of R. rattus in Peninsular Malaysia and examine the intraspecific variation of the skull by assessing 20 craniodental characters of 130 R. rattus specimens. After observing the correlation matrix, highly correlated characters were removed and the remaining 14 craniodental characters were analysed using the conventional morphometrics method via univariate and multivariate statistics. We assessed the impact of age, sex and geographical factors (latitude, longitude and precipitation) on craniodental size. Male and female specimens were analysed separately since statistically significant sexual dimorphism was present. Males showed greater craniodental measurements compared to females. Three distinct age groups (C2, C3 and C4) were visible in the principal component analysis (PCA) and canonical variate analysis (CVA) plots for male and female specimens. Ages C2 and C3 shared similarities in craniodental measurements while C4 showed variability compared to C2 and C3. None of the geographical factors studied showed statistical significance for both male and female R. rattus. The results obtained from this study could potentially be a yardstick to observe if similar variations in craniodental traits are present in R. rattus from other countries in the Southeast Asian region. Penerbit Universiti Kebangsaan Malaysia 2019-10 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/14369/1/05%20Nurul%20Huda%20Mohamad%20Ikbal.pdf Nurul Huda Mohamad Ikbal, and Dharini Pathmanathan, and Subha Bhassu, and Khanom Simarani, and Hasmahzaiti Oma, (2019) Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia. Sains Malaysiana, 48 (10). pp. 2103-2111. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid48bil10_2019/KandunganJilid48Bil10_2019.htm
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Rattus rattus which is believed to be native to India is easily found in all continents of the world. With the absence of R. rattus from lineage I and the presence of lineage IV in Southeast Asia, little is known about how rodent morphology varies biogeographically. We evaluate the skull morphometrics in the population of R. rattus in Peninsular Malaysia and examine the intraspecific variation of the skull by assessing 20 craniodental characters of 130 R. rattus specimens. After observing the correlation matrix, highly correlated characters were removed and the remaining 14 craniodental characters were analysed using the conventional morphometrics method via univariate and multivariate statistics. We assessed the impact of age, sex and geographical factors (latitude, longitude and precipitation) on craniodental size. Male and female specimens were analysed separately since statistically significant sexual dimorphism was present. Males showed greater craniodental measurements compared to females. Three distinct age groups (C2, C3 and C4) were visible in the principal component analysis (PCA) and canonical variate analysis (CVA) plots for male and female specimens. Ages C2 and C3 shared similarities in craniodental measurements while C4 showed variability compared to C2 and C3. None of the geographical factors studied showed statistical significance for both male and female R. rattus. The results obtained from this study could potentially be a yardstick to observe if similar variations in craniodental traits are present in R. rattus from other countries in the Southeast Asian region.
format	Article
author	Nurul Huda Mohamad Ikbal, Dharini Pathmanathan, Subha Bhassu, Khanom Simarani, Hasmahzaiti Oma,
spellingShingle	Nurul Huda Mohamad Ikbal, Dharini Pathmanathan, Subha Bhassu, Khanom Simarani, Hasmahzaiti Oma, Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia
author_facet	Nurul Huda Mohamad Ikbal, Dharini Pathmanathan, Subha Bhassu, Khanom Simarani, Hasmahzaiti Oma,
author_sort	Nurul Huda Mohamad Ikbal,
title	Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia
title_short	Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia
title_full	Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia
title_fullStr	Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia
title_full_unstemmed	Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia
title_sort	morphometric analysis of craniodental characters of the house rat, rattus rattus (rodentia: muridae) in peninsular malaysia
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2019
url	http://journalarticle.ukm.my/14369/ http://journalarticle.ukm.my/14369/ http://journalarticle.ukm.my/14369/1/05%20Nurul%20Huda%20Mohamad%20Ikbal.pdf
first_indexed	2023-09-18T20:06:56Z
last_indexed	2023-09-18T20:06:56Z
_version_	1777407220785348608

Morphometric analysis of craniodental characters of the House Rat, Rattus rattus (Rodentia: Muridae) in Peninsular Malaysia

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