Dzulhelmi Nasir

Dzulhelmi Nasir
FGV R&D Sdn Bhd

BSc (Animal Resource Science & Management); MSc (Zoology); PhD (Ecology & Biodiversity)
Biodiversity Conservation, Integrated Pest Management

About

105
Publications
63,032
Reads
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158
Citations
Citations since 2016
83 Research Items
127 Citations
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
Introduction
Studying the natural history on various group of animals have been my main interest. Nevertheless, my current research focus are related to pests in agriculture ecosystem
Additional affiliations
December 2016 - present
Malaysian Palm Oil Board
Position
  • Research Officer
Description
  • Ecosystem services, Biodiversity, Natural history
Education
June 2012 - June 2016
University of Malaya
Field of study
  • Ecology & Biodiversity
January 2009 - June 2011
University Malaysia Sarawak
Field of study
  • Zoology
June 2005 - June 2008
University Malaysia Sarawak
Field of study
  • Animal Resource Science & Management

Publications

Publications (105)
Article
Full-text available
The parental care strategy and diet requirements of the yellow-vented bulbul Pycnonotus goiavier chicks were studied. The assessment was conducted based on the (1) number of feeding bouts (bouts/hour), (2) average time intervals between each feeding (minutes/bouts) (3) feeding strategies (perch-go-in or direct-go-in) and (4) types of food items car...
Article
Malaysia is one of the largest palm oil-producing countries in the world. Located in the Southeast Asia region, this country is also known as one of the mega biodiversity-rich countries which contains numerous species. In this study, arthropods were sampled using sticky traps at three sites within an oil palm dominated landscape. We examined how ve...
Article
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The oil palm pollinating weevil, Elaeidobius kamerunicus Faust (Coleoptera: Curculionidae) was first introduced into Malaysia from Cameroon as the main oil palm pollinator in 1981. Since then, oil palm pollination has improved and the need for assisted pollination has reduced. However, their pollinating behavior may be influenced by starvation, sex...
Article
Full-text available
Oil palm, also known as Elaeis guineensis Jacq (Arecales: Arecaceae), depends greatly on the pollinating weevil Elaeidobius kamerunicus (Coleoptera: Curculionidae) for fruit production. Despite this, information on the pollen-carrying capacity of E. kamerunicus is still lacking. This study assessed the pollen-carrying capacity (PCC) and pollen viab...
Article
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Water is essential for the growth and productivity of oil palm and hence adequate rainfall contributes to the oil palm water requirement. Sufficient rainfall becomes crucial in attaining good growth and yield. Over the past 23 years, the yield response from irrigated palms in Serting Hilir, Malaysia was reported to be 12 t ha-1 year-1 or 56% higher...
Article
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This checklist serves as a basic information based on compilation from published literatures, internet database and from specimens’ collection stored at Center of Insect Systematics Universiti Kebangsaan Malaysia. To date, this study compiled smaller arachnids (28 species) and Pseudoscorpiones (41 species) that had been recorded in Malaysia. Althou...
Article
Sonneratia caseolaris commonly known as mangrove apple or Berembang in the Malay language, is a species of plant in the family Lythraceae. Area of S. caseolaris along Selangor River in Kampung Kuantan has become a natural habitat for a variety of arthropods. This study aimed to identify the species variations in arthropod communities at different s...
Article
Full-text available
Sonneratia caseolaris commonly known as mangrove apple or Berembang in the Malay language, is a species of plant in the family Lythraceae. Area of S. caseolaris along Selangor River in Kampung Kuantan has become a natural habitat for a variety of arthropods. This study aimed to identify the species variations in arthropod communities at different s...
Article
Full-text available
Although diverse groups of spiders are present in tropical countries, very little attention has been given on various types of differences that exist within these groups, particularly for the groups of tropical spiders in Malaysia. The morphological and genitalia characteristics are traditionally used to identify species variants. However, in this...
Technical Report
Full-text available
Burung-burung penghijrah mempunyai menempuhi cabaran bermigrasi
Article
Purpose Bartonellosis is a vector-borne disease with worldwide prevalence. Several Bartonella associated with companion animals such as Bartonella henselae and Bartonella quintana are the species with zoonotic implications and have become a global concern. Other bartonellae associated with wild animals, however, remain underappreciated particularly...
Technical Report
Full-text available
Teknologi fotografi mampu menarik minat mengenali spesies reptilia
Article
Bartonelloses are emerging infectious diseases that are common in humans and animals worldwide. Several Bartonella species associated with companion animals such as Bartonella henselae and Bartonella rochalimae are species with zoonotic implications and have become a global concern. Other Bartonella species associated with wild animals, however, re...
Chapter
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This chapter reveals that oil palm ecosystem are able to support biodiversity conservation goals.
Technical Report
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Hutan tropika kaya dengan spesies fauna
Article
The predatory reduviid bug, Sycanus dichotomus (Hemiptera: Reduviidae), is a biological control agent against the oil palm pest bagworm (Metisa plana). This study investigates the predation efficiency and feeding preferences of laboratory-reared and wild S.dichotomus towards M. plana larvae under laboratory conditions. The results showed that wild...
Technical Report
Full-text available
Sehingga kini, hanya sedikit infomasi mengenai spesies burung tambun, sang serok dan pikau yang kita ketahui hingga kini.
Article
Current occurrence of Nitzschia Hassall from marine and freshwater environment in Malaysia is compiled from current and previously published materials. Phytoplankton was collected using a 20 µm plankton net from waterfronts of Peninsular Malaysia and Borneo. Some Nitzschia cells were successfully isolated and established into clonal cultures. For m...
Technical Report
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Kenali rama-rama perosak yang terdapat di ekosistem sawit.
Technical Report
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Burung nokturnal yang jarang diketahui umum.
Article
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Bats, occupying a variety of habitats, play important roles in the tropical forest. Through this study, comparisons on bat species richness and evenness in primary forest, secondary forest, and urban forest were made. Sampling was conducted between 18:30 PM and 06:30 AM using 10 mist-nets and four harp traps for three consecutive nights at the prim...
Technical Report
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Kepelbagaian amfibia yang terdapat di negara merupakan aset semulajadi yang boleh menjadi daya tarikan kepada sektor perlancongan.
Poster
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The Insects of Malaysia poster is made to nurture the society to appreciate these small creatures. Poster Serangga-serangga Malaysia dibuat bertujuan untuk mendidik masyarakat untuk menghargai makhluk kecil ini.
Technical Report
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Infomasi mengenai mengkarung untuk dikongsi bersama.
Technical Report
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Memberi infomasi umum mengenai kepentingan spesies musang yang terdapat di negara Malaysia.
Book
At least 56 species of flora and 91 species of fauna that has been recorded within the vicinity of MPOB Lahad Datu Research Station complex. The inventory of flora and fauna species is an effort towards sustainable management practice to enhance long term conducive ecosystem for MPOB Lahad Datu Research Station, Sabah. Terdapat 56 spesies flora da...
Cover Page
Full-text available
Science News Magazine covers the facts on the Sunda Colugo: https://www.sciencenews.org/article/colugo-flying-lemur-mammal-southeast-asia
Article
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The pollinating weevil, Elaeidobius kamerunicus was introduced to Malaysia as an oil palm pollinator agent in 1981. After the introduction, the weevil has distributed widely in the oil palm plantation around Malaysia. This study aims to investigate the morphometric differences in Elaeidobius kamerunicus population within Malaysia, as well as from i...
Technical Report
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Terdapat pelbagai spesies kucing hutan di Malaysia. Mari kita mengenali spesies kucing hutan ini.
Technical Report
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Terdapat banyak burung ciak urasia yang bertebaran di kawasan bandar. Apakah manfaat yang kita boleh perolehi daripada kehadiran mereka?
Article
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Serangga memainkan peranan yang sangat penting di dalam ekosistem pertanian dan merangkumi pelbagai kumpulan berfungsi. Objektif kajian ini adalah untuk menentukan arah pergerakan komuniti serangga yang merentasi ekosistem sawit pada sempadan guna tanah berbeza. Kajian ini dijalankan di Ladang Endau-Rompin (LER), Pahang. Enam stesen persampelan dit...
Technical Report
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Technical Report
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Kisah semut di Surah An-Naml memberi pengajaran dan hikmah yang boleh diambil dan dijadikan iktibar bagi setiap manusia.
Technical Report
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Anai-anai memainkan peranan yang sangat besar di dalam ekosistem alam ini.
Article
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Malaysia has become one of the most important countries that produce and supply the world's palm oil. The oil palm industry has emphasised the need for the preservation of small forest patches within oil palm plantations to sustain various species of fauna; this is a new conservation strategy for developing biodiversity-friendly oil palm plantation...
Technical Report
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Terdapat beberapa kaedah yang boleh dirungkai dalam mengawal rodensia perosak di dalam ladang sawit.
Article
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Effect of sublethal dose of three insecticides which commonly used against oil palm bagworms, namely cypermethrin, deltamethrin and trichlorfon, were tested against one of the important predator of oil palm bagworms, Sycanus dichotomus. These insecticides were tested on female of S. dichotomous following direct dip method. The results showed that t...
Poster
Full-text available
This poster gives a brief introduction on the Malaysian tarantula species. Poster ini memberi pengenalan mengenai spesies tarantula Malaysia
Article
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In human‐modified landscapes, important ecological functions such as predation are negatively affected by anthropogenic activities, including the use of pesticides and habitat degradation. Predation of insect pests is an indicator of healthy ecosystem functioning, which provides important ecosystem services, especially for agricultural systems. In...
Article
Full-text available
Diversity of spider groups have received less research attention and there are limited published references for spiders from Peninsular Malaysia. The current survey was conducted to locate and identify foliage-dwelling spiders (Arachnida, Araneae) at five different sites in Peninsular Malaysia. Spider specimens were collected using manual search an...
Article
Full-text available
The oil palm pollinating weevil Elaeidobius kamerunicus Faust (Coleoptera: Curculionidae) was first introduced into Malaysia from Cameroon in 1981 as the main oil palm pollinator. Adult weevils were collected from six localities in Malaysia, one locality in Indonesia, and one locality in Liberia. Morphometric analysis was performed to detect possib...
Article
Full-text available
Kajian ini dijalankan bagi mengetahui corak taburan ruang-masa semut (Hymenoptera: Formicidae) dan memahami ekologi ruang semut di ekosistem sawit di Endau Rompin, Pahang. Persampelan dijalankan selama empat bulan berturut- turut di tiga jenis tanah iaitu tanah liat (A1 & A2), tanah gambut dalam (B1 & B2) dan tanah gambut cetek (C1 & C2). Kaedah pe...
Article
Full-text available
Coleoptera is the most diverse group of insect with important roles in ecosystem and tremendous economic importance especially in oil palm industry. A study of the diversity and abundance of soil beetles (Coleoptera: Carabidae) on different type of soil in the Endau-Rompin Plantation, Pahang was conducted started in 2009 until 2012. The study aims...
Article
Full-text available
Taxonomy-based morphometric study is a technique often used to separate species. This study aimed to determine discrimination among species of harvestmen based on morphometric analysis. Harvestmen samples collected from Lata Jarum, Pahang deposited at the Centre of Insect Systematic, National University of Malaysia (CISUKM) were used. A total of 21...
Article
Full-text available
Coleoptera is the most diverse group of insect with important roles in ecosystem and tremendous economic importance especially in oil palm industry. A study of the diversity and abundance of soil beetles (Coleoptera: Carabidae) on different type of soil in the Endau-Rompin Plantation, Pahang was conducted started in 2009 until 2012. The study aims...
Technical Report
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Kingfishers can act as bioindicator for water quality.
Article
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A study was conducted on the population and behaviour of long-tailed macaque, Macaca fascicularis and southern pig-tailed macaque, M. nemestrina in Paya Bakau Park, Perak, Malaysia. Direct field observations were taken for 20 non-consecutive days between October and December 2016. One-hour observation session was carried out on daily activity budge...
Technical Report
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The stuff of nightmares to some, Malaysia's tarantulas are treasures not yet fully recovered.
Technical Report
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Informasi mengenai agen utama pendebungaan sawit
Technical Report
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Di Malaysia, terdapat lebih 514 spesies daripada 6250 spesies kepinding pembunuh yang telah berjaya dikenalpasti.
Technical Report
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Article
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Kajian terhadap struktur komuniti tanah di kawasan ladang monokultur masih kurang dan tidak meluas sedangkan komuniti ini memberi sumbangan besar terhadap kestabilan sesuatu ekosistem. Tujuan kajian adalah untuk menentukan perbezaan komposisi makroartropoda yang berasosiasi dengan biojisim sawit mereput di atas tiga jenis tanah yang berbeza berdasa...
Article
Full-text available
The diversity and composition of beetles from oil palm plantation in Ladang Lekir, Perak, Malaysia were collected each month using Malaise trap, yellow pan and window traps from three different sites on the basis of their oil palm aged i.e. five (Plot 1), seven (Plot 2) and 12 (Plot 3) years old from November 2015 to October 2016. From 3862 individ...
Article
Full-text available
Termites are perceived as decomposers and as pests in an ecosystem. A study on the species composition of termites in different soil types (i.e. clay, sand and peat) in oil palm plantations was conducted between 6 April 2015 and 10 December 2015 in nine selected localities in Johor (Malaysia) and Riau (Indonesia). Sampling of termites was conducted...
Article
Full-text available
Termites are perceived as decomposers and as pests in an ecosystem. A study on the species composition of termites in different soil types (i.e. clay, sand and peat) in oil palm plantations was conducted between 6 April 2015 and 10 December 2015 in nine selected localities in Johor (Malaysia) and Riau (Indonesia). Sampling of termites was conducted...
Article
Full-text available
Thirty adult female individuals of each of the four orb-web spider species namely Araneus sp. (Araneidae), Gasteracantha kuhli Koch, 1837 (Araneidae), Gasteracantha hasselti Koch, 1837 (Araneidae) and Opadometa grata (Simon, 1877) (Tetragnathidae) were randomly sampled between 1000 and 1400 h from May to July 2017 in an oil palm plantation in Perak...
Article
Full-text available
Kajian ke atas instar III serangga pemangsa, Sycanus dichotomus yang dirawat dengan racun serangga cypermethrin, deltamethrin dan trichlorfon melalui kaedah pencelupan telah dilakukan. Racun serangga tersebut merupakan racun yang biasa digunakan untuk mengawal perosak pemakan daun sawit. Hasil ujikaji larutan dos separa mati racun serangga ke atas...
Article
Full-text available
Effect of sublethal dose of three insecticides which commonly used against oil palm bagworms, namely cypermethrin, deltamethrin and trichlorfon, were tested against one of the important predator of oil palm bagworms, Sycanus dichotomus. These insecticides were tested on female of S. dichotomous following direct dip method. The results showed that t...
Article
Full-text available
Sycanus dichotomous (Hemiptera: Reduviidae) merupakan antara pemangsa semulajadi bagi kebanyakan jenis serangga perosak tanaman. Kajian makmal yang dijalankan ini bertujuan menilai kesesuaian pemeliharaan S. dichotomous secara berkelompok melalui pemerhatian ke atas aspek kitar hidup dan tahap kesuburan pemangsa. Kajian dijalankan di makmal rumah h...
Technical Report
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Misunderstood as pests, these night flyers are more important than we give them credit for.
Article
Full-text available
The diversity and composition of beetles from oil palm plantation in Ladang Lekir, Perak, Malaysia were collected each month using Malaise trap, yellow pan and window traps from three different sites on the basis of their oil palm aged i.e. five (Plot 1), seven (Plot 2) and 12 (Plot 3) years old from November 2015 to October 2016. From 3862 individ...
Technical Report
Full-text available
Pengaplikasian sistem pengurusan perosak bersepadu (PBB) dalam ekosistem pertanian berpotensi untuk menyumbang sesuatu kepada ekonomi negara. Kesan aplikasi sistem PPB yang paling ketara adalah dalam kawalan serangga perosak tanaman. Dalam hal ini, penggunaan racun sintetik serangga untuk mengawal serangga berkurangan.
Cover Page
Full-text available
Mongabay reports on the first record of ultrasound communication in the mysterious colugo. Full story at: https://news.mongabay.com/2018/05/first-record-of-ultrasound-communication-in-the-mysterious-sunda-colugo/
Technical Report
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Kumbang pendebunga kelapa sawit Elaeidobius kamerunicus (Coleoptera: Curculionidae)
Article
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This article provides information with regards to the natural predators of the oil palm pollinating weevil in oil palm ecosystem.
Article
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Approximately 34 tetragnathid species have been recorded in Malaysia. These orb-web spiders start building their first webs in early juvenile stages. The relationships between the morphology and the web characteristics of four tetragnathid species (Leucauge argentina, L. celebesiana, Mesida gemmea and Tylorida ventralis) were presented in this pape...
Technical Report
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Technical Report
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This article discuss a topic related to spiders mentioned in the Holy Quran.
Poster
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• Previously, pollination mechanism in oils palm was mainly dependent on wind and pollinator insects Thrips hawaiiensis (Thysanoptera: Thripidae) and Pyroderces sp. (Lepidoptera: Cosmopterigidae). • In the 1980s, pollinating weevil Elaeidobius kamerunicus (Coleoptera: Curculionidae) was brought from Cameroon, West Africa into the growing oil palm c...
Article
Full-text available
This is the first series on harvestmen species representing a total of 67 species from 25 genera and 9 families of harvestmen (Opiliones) from Malaysia compiled from available literatures between 1900s till date. In addition, the preliminary field survey identified six harvestmen species which are Dentobunus luteus, Gagrella longipalpis, Koyamaia c...
Article
Full-text available
p>Amnesic Shellfish Poisoning (ASP) is a type of intoxication caused by the neurotoxin domoic acid (DA). The diatom genus Nitzschia is capable of producing this toxin. Screening for the presence of toxic Nitzschia spp. was carried out at various estuaries in Malaysia. Nitzschia -like cells were isolated and established into clonal cultures. Late st...
Poster
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The dragonflies & damselflies poster is presented in dual languages (English and Bahasa Malaysia). The aim of this poster is to nurture local interest on the dragonflies & damselflies fauna of Malaysia. Poster pepatung & pepatung jarum ini dipersembahkan dalam dwi-bahasa (Inggeris dan Bahasa Malaysia). Poster ini dibuat bertujuan untuk menanamkan m...
Article
Full-text available
Mortality of hundreds of marine and freshwater fishes was reported in Malacca River, Malaysia on 22 April 2014. Water samples were collected from water surface (<10 m) using 20 m mesh plankton net. Observation under light microscope revealed relatively high abundance of zooplankton dominated by the red-tide forming ciliate Mesodinium rubrum (syn:...
Article
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Orb-web building spiders choose quality microhabitat to optimise foraging success. In this study, web-site selection of 12 tetragnathid species was investigated to determine its influence on the web characteristics. The two most significant variables were web size and the web height from ground (web-site). Statistical analyses showed that some tetr...
Article
Full-text available
This is the first series on Harvestmen species representing a total of 67 species from 25 genera and 9 families of Harvestmen (Opiliones) from Malaysia compiled from available literatures between 1900s till date. In addition, the preliminary field survey identified six Harvestmen species which are Dentobunus luteus, Gagrella longipalpis, Koyamaia c...
Article
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This article presents 35 new records of spiders from 10 families and 30 genera collected from ten selected localities in Kuching division, Sarawak, Malaysia. This added up to a total of 247 recognized species that are recorded from the largest state in Malaysia.
Thesis
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This study aimed to determine the diversity and distribution of spider species that can be found in selected locations on the west coast of Peninsular Malaysia. This study also aimed to determine the systematics and ecology of tetragnathid species in Malaysia. To document the spider diversity, specimens were collected from 11 selected locations fro...
Book
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Buku ini membincangkan biologi spesies haiwan nokturnal yang unik dan jarang diketahui umum, iaitu Kubung yang merupakan spesies haiwan mamalia di kebanyakan hutan Asia Tenggara. Sifat istimewa haiwan misteri ini didedahkan kepada umum daripada pelbagai aspek sejarah semula jadinya dan juga diselitkan dengan isu pengurusan lestari terhadap habitatn...
Article
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This paper is the second part of a continuing series, with the main objective of compiling and recording the spider species that can be found in Sabah, Malaysia. Based on the specimens collected during this field trip, a total of 50 new records of spider species from 11 families and 37 genera have been found. This includes one newly discovered spid...
Book
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This guide book is written in a way that is easy to understand, accompanied with images and illustrations that can assist in determining the spider groups. This book provides a photographic guide to at least 160 genera from 30 families of common spiders in Malaysia. The description is based on physical characters to determine the genera although th...
Poster
Full-text available
The butterflies & moths poster is presented in dual languages (English and Bahasa Malaysia). The aim of this poster is to nurture local interest on the butterflies & moths fauna of Malaysia. Poster Kupu-kupu & Rama-rama ini dipersembahkan dalam dwi-bahasa (Inggeris dan Bahasa Malaysia). Poster ini dibuat bertujuan untuk menanamkan minat mengenai Ku...
Article
Full-text available
Two new species from the genus Opadometa Archer, 1951 (Araneae: Tetragnathidae) are described, the O. sarawakensis sp. nov. and O. kuchingensis sp. nov. from Bako National Park, Sarawak, Malaysia. Descriptions, illustrations and summary on the web characters are provided based on female specimens.
Article
Full-text available
A new species of the twig-legged orb-weaver spider from the genus Cyphalonotus Simon 1895, C. selangor sp. nov., is illustrated and described based on a female specimen from Kuala Selangor Nature Park, Malaysia.
Article
Full-text available
This study documented an additional of 219 spider species to the previous checklist of Peninsular Malaysia. Species recorded comprised of field specimens and lists obtained from available literatures. For field specimens, spiders were collected from 11 different locations in west coast of Peninsular Malaysia between January 2012 through December 20...
Article
Full-text available
The seasonal variation of spider assemblages in botanical garden was investigated. The spiders were manually collected by diurnal and nocturnal session between two seasons. A total of 19 families from 65 genera and 96 species were recorded. Richness-estimator indicates the inventory were 67% complete within the botanical garden. The capture rate fo...
Chapter
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Biological control has come a long way towards adapting to the changing needs of agricultural pest suppression. Current trends in agriculture towards reduced pesticide use and ecological sustainability have led to surge of interest in spiders as potential biological control agents. This is because spiders have the capacity to exist in various condi...
Article
Full-text available
This is the first series representing a total of 222 spider species from 30 families and 130 genera recorded in Sabah. The data was obtained from available literatures, scientific expedition and other field collections from November 2010 to December 2011. A total of 40 species is considered as new record for this state. This inventory aims to offer...
Article
Full-text available
This study presents the behaviors of the Sunda Colugo Galeopterus variegatus in Bako National Park. Grooming behavior differed between the Colugo with carried infant and the Colugo without carried infant. Current study showed that the Colugo with carried infant spend longer time for grooming the infant. The outcomes from this study provide informat...
Article
Full-text available
The Colugo is a nocturnal arboreal mammal that inhabits the tropical rainforest in South East Asia. Photographs of the Colugo in gliding motion were taken using Digital SLR camera with the aid of speed light and flashlight to determine the Colugo sexes. These photographs technique could be used to determine the Colugo sexes without the need to capt...
Book
Full-text available
The Colugo is a nocturnal cryptic creature which can be found in the rainforest of South East Asia. Its gliding ability as a perfect adaptation and evolution to the animal kingdom has became the fascinating thing about this creature. Searching for them in the tropical rainforest can be a challenging task. But, it can also be an adventurous life exp...
Poster
Full-text available
The spider poster is presented in dual languages (English and Bahasa Malaysia). The aim of this poster is to nurture local interest on the spider fauna of Malaysia. Poster labah-labah ini dipersembahkan dalam dwi-bahasa (Inggeris dan Bahasa Malaysia). Poster ini dibuat bertujuan untuk menanamkan minat mengenai labah-labah yang terdapat di Malaysia...
Technical Report
Full-text available
Poster
Full-text available
The seasonal variation of spider assemblages in botanical gardens was investigated. Spiders were collected by diurnal and nocturnal session between two seasons. Comparisons were made between the four sections within the botanical garden compound. A total of 19 families from 89 genera and 144 species were recorded. Richness-estimator indicates the i...
Article
Full-text available
This short article discusses some aspect regarding a male Colugo found dead, a pair of Colugo mating, and a group of four Colugos living in the same tree cavity which add-in more valuable information about this cryptic species
Book
Full-text available
The Sunda Colugo (Galeopterus variegatus) is one of the enigmatic species that inhabit the tropical rainforest of South East Asia. Due to the difficulties in finding and tracking this nocturnal arboreal mammal in its free ranging habitat, the Sunda Colugo had received little attention. Most of the information is shared among researchers while leavi...