Abd Rahman Mohd-Ridwan

Dr. Abd Rahman Mohd-Ridwan

orcid

Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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18 July 2019 in Tropical Life Sciences Research
Verified
Journal Article
Open access
JWJulius William-Dee
Julius William-Dee
FKFaisal Ali Anwarali Khan
Faisal Ali Anwarali Khan
QRQhairil Rosli
Qhairil Rosli
MMMuhd Amsyari Morni
Muhd Amsyari Morni
IAIsham Azhar
Isham Azhar
AMAbd Rahman Mohd-Ridwan
Abd Rahman Mohd-Ridwan
Rapid urbanisation in Malaysia has led to an increase in anthropogenic activities, inducing degradation of the natural environment. This advocates the necessity of wildlife and resource inventories be conducted at available forested areas, promoting steady improvement in the existing conservation and management plans, especially for threatened taxa such as the small mammals. Small mammals surveys was conducted at Tasik Bera, Ulu Gombak Forest Reserve, Sungkai Wildlife Conservation Centre, Penang Island, and Wang Kelian State Park. Harp traps, mist-nets, cage traps and pitfall traps were set during the surveys. Rhinolophus affinis was the most abundant (N = 61) volant small mammal, followed by Rhinolophus lepidus (N = 27). Meanwhile, the most abundant non-volant small mammal are Leopoldamys sabanus (N = 33), followed by Maxomys rajah (N = 25), and Tupaia glis (N = 22). Two species of shrews, Suncus etruscus and Crocidura monticola were caught as singletons. The results indicated that Ulu Gombak Forest Reserve has the highest species diversity (H’ = 2.754), whereas Penang Island recorded the lowest (H’ = 2.245). The species lists of small mammals generated from the survey will be significant for various stakeholders’ conservation and monitoring plans. Pembangunan yang semakin pesat di Malaysia telah meningkatkan bilangan aktiviti antropogenik, sekaligus menyebabkan kemerosotan alam sekitar. Ini menunjukkan bahawa perlunya inventori hidupan liar dan sumber alam sekitar dijalankan di dalam kawasan hutan yang sedia ada, untuk mempromosikan peningkatan yang seimbang dalam pelan pemuliharaan dan pengurusan yang sedia ada, terutamanya untuk haiwan yang terancam seperti spesies mamalia kecil. Kajian mamalia kecil telah dijalankan di Tasik Bera, Hutan Simpan Ulu Gombak, Pusat Konservasi Hidupan Liar Sungkai, Pulau Pinang, dan Taman Negeri Wang Kelian. Harp trap, mist net, cage trap dan pitfall trap telah dipasang untuk kajian. Spesies Rhinolophus affinis (N = 61) merupakan spesies yang paling banyak ditangkap, diikuti dengan R. Lepidus (N = 27). Manakala untuk mamalia kecil tidak terbang, species Leopoldamys sabanus merupakan spesies paling banyak (N = 33) diikuti dengan Maxomys rajah (N = 25) dan Tupaia glis (N = 22). Dua spesies cencurut, Suncus etruscus dan Crocidura monticola masing-masing telah ditangkap dengan jumlah satu individu bagi setiap satu spesies. Hutan Simpan Ulu Gombak merekodkan kepelbagaian spesies yang paling tinggi (H’ = 2.754), manakala Pulau Pinang merekodkan nilai yang paling rendah (H’ = 2.245). Senarai mamalia kecil yang telah direkodkan melalui kajian ini merupakan maklumat yang signifikan bagi tujuan pemantauan dan konservasi biodiversiti.

5 September 2023 in Biodiversity Data Journal
Verified
Journal Article
Open access
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MKMohamad Khairulmunir
Mohamad Khairulmunir
MGMillawati Gani
Millawati Gani
KKKayal Vizi a/p Karuppannan
Kayal Vizi a/p Karuppannan
AMAbd Rahman Mohd-Ridwan
Abd Rahman Mohd-Ridwan
BMBADRUL MUNIR MD-ZAIN
BADRUL MUNIR MD-ZAIN
The Malayan tiger (Panthera tigris jacksoni) is a critically endangered species native to the Malaysian Peninsula. To imitate wild conditions where tigers do not hunt every day, numerous wildlife sanctuaries do not feed their tigers daily. However, the effects of fasting on the gut microbiota of captive Malayan tigers remains unknown. This study aimed to characterise the gut microbiota of captive Malayan tigers by comparing their microbial communities during fasting versus normal feeding conditions. This study was conducted at the Melaka Zoo, Malaysian Peninsula and involved Malayan tigers fasted every Monday. In total, ten faecal samples of Malayan tiger, two of Bengal tiger (outgroup) and four of lion (outgroup) were collected and analysed for metabarcoding targeting the 16S rRNA V3–V4 region. In total, we determined 14 phyla, 87 families, 167 genera and 53 species of gut microbiome across Malayan tiger samples. The potentially harmful bacterial genera found in this study included Fusobacterium, Bacteroides, Clostridium sensu stricto 1, Solobacterium, Echerichia shigella, Ignatzschineria and Negativibacillus. The microbiome in the fasting phase had a higher composition and was more diverse than in the feeding phase. The present findings indicate a balanced ratio in the dominant phyla, reflecting a resetting of the imbalanced gut microbiota due to fasting. These findings can help authorities in how to best maintain and improve the husbandry and health of Malayan tigers in captivity and be used for monitoring in ex-situ veterinary care unit.

27 September 2022 in Biodiversity Data Journal
Verified
Journal Article
Open access
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NONur Azimah Osman
Nur Azimah Osman
MAMuhammad Abu Bakar Abdul-Latiff
Muhammad Abu Bakar Abdul-Latiff
AMAbd Rahman Mohd-Ridwan
Abd Rahman Mohd-Ridwan
SYSalmah Yaakop
Salmah Yaakop
KKKayal Vizi a/p Karuppannan
Kayal Vizi a/p Karuppannan
BMBADRUL MUNIR MD-ZAIN
BADRUL MUNIR MD-ZAIN
The long-tailed macaque (Macaca fascicularis) has a wide range in both Peninsular Malaysia and Borneo. Although the primates are especially vulnerable to habitat alterations, this primate lives in disturbed habitats due to human-induced land-use. Thus, this study presents a faecal metabarcoding approach to clarify the plant diet of long-tailed macaques from five locations in Peninsular Malaysia to represent fragmented forest, forest edge, island and recreational park habitats. We extracted genomic DNA from 53 long-tailed macaque faecal samples. We found 47 orders, 126 families, 609 genera and 818 species across these five localities. A total of 113 plant families were consumed by long-tailed macaques in Universiti Kebangsaan Malaysia, 61 in the Malaysia Genome and Vaccine Institute, 33 in Langkawi Island, 53 in Redang Island and 44 in the Cenderawasih Cave. Moraceae (33.24%) and Fabaceae (13.63%) were the most common families consumed by long-tailed macaques from the study localities. We found that habitat type impacted diet composition, indicating the flexibility of foraging activities. This research findings provide an understanding of plant dietary diversity and the adaptability of this macaque with the current alteration level that applies to long-tailed macaque conservation management interest in the future.

1 June 2017 in Acta Chiropterologica
Verified
Journal Article
Closed access
NSNursyafiqah Shazali
Nursyafiqah Shazali
TCTeong Han Chew
Teong Han Chew
MSMohd Shahir Shamsir
Mohd Shahir Shamsir
RTRoberta Chaya Tawie Tingga
Roberta Chaya Tawie Tingga
AMAbd Rahman Mohd-Ridwan
Abd Rahman Mohd-Ridwan
FKFaisal Ali Anwarali Khan
Faisal Ali Anwarali Khan
Conventionally, bat roost counts and roost size estimation are potentially a disruptive, repetitive method and are time consuming. Introduction of the Light Detection and Ranging (LiDAR) scanning system, an optical remote sensing technology, for scientific purposes have open many research possibilities especially on cave wildlife surveys. Scanned images at high resolution provide new effective biological tools for assessing bat roosts inside caves on walls or ceiling in total darkness. LiDAR system was applied to census bats that roost in Wind Cave Nature Reserve, Sarawak, Malaysia, based on laser return intensity values from the images. Bats that roost in large clusters, specifically Penthetor lucasi were determined through automated counting using connected components labelling, a graph theory algorithm mostly used in image analysis applications. Roost surface area of bats species was calculated based on point clouds extracted and using simple trigonometry. Wind Cave was successfully modelled into three...

22 May 2024 in Nature Conservation
Verified
Journal Article
Open access
PDF file
MGMillawati Gani
Millawati Gani
FSFrankie Thomas Sitam
Frankie Thomas Sitam
ZKZubaidah Kamarudin
Zubaidah Kamarudin
SSSiti Suzana Selamat
Siti Suzana Selamat
NANik Mohd Zamani Awang
Nik Mohd Zamani Awang
BMBADRUL MUNIR MD-ZAIN
BADRUL MUNIR MD-ZAIN
Understanding the prey preference of Malayan tiger (Panthera tigris jacksoni) in Malaysia is important to guide conservation planning initiatives. The utilisation of DNA metabarcoding provides valuable insights, particularly in the field of carnivora diet research. This technique has been proven to be effective for identifying various species within complex mixtures such as scat materials, where visual identification is challenging. The Cytochrome c oxidase subunit I (COI) locus has been selected as it is a widely used as an effective non-invasive approach for diet studies. Hence, given this advance approach, Malayan tiger scats were collected on the basis of existing records of their presence in two types of habitats, namely, protected areas (PA) and human–tiger conflict (HTC) areas. This study aimed to identify prey species in Peninsular Malaysia, based on Malayan tiger scat samples using DNA metabarcoding. Based on the partial mitochondrial COI region, DNA metabarcoding led to the taxonomic resolution of prey DNA remnants in scats and the identification of prey species consumed by Malayan tiger, which were predominately small-to-medium-sized prey, including livestock. The dominant DNA prey detected belongs to the family Canidae, followed by Bovidae, Vespertilionidae, Homonidae, Felidae, Phasianidae and Muridae. A significant difference (p < 0.05) was observed in alpha and beta diversity using the Shannon index and PERMANOVA with regard to prey richness and evenness in two different habitat groups, namely, PA and HTC. Our finding provides insights into Malayan tiger dietary requirements, which can be used to develop conservation plans and strategies for Malayan tiger, particularly for habitat priorities.