Asa Achmadi

• Doctor of Philosophy
• Senior Researcher at Research Center for Biosystematic and Evolution

The island of Sulawesi, in Indonesia, lies at the crossroads of the Indo-Australian Archipelago and has remained isolated from the Asian (Sunda) and Australian (Sahul) continental shelves for at least the last 10 million years. Of the 50 native species of rodents on Sulawesi, all are endemic and represent the evolution of a variety of ecological an...

Knowledge of the diversity and relationships of species in many groups of plants and animals in Southeast Asia is severely limited, preventing an integrative understanding of evolutionary and ecological processes in island archipelagos. We generated a 3-locus DNA sequence data set to estimate phylogenetic relationships among species and populations...

In theory, competition among species in a shared habitat results in niche separation. In the case of small recondite mammals such as shrews, little is known about their autecologies, leaving open questions regarding the degree to which closely related species co-occur and how or whether ecological niches are partitioned. The extent to which species...

ABSTRACT We review the murid rodents of the genus Maxomys from Borneo, and recognise one new species, Maxomys tajuddinii sp. nov. The type locality is Empakuq village (1o 19’ 8.11” S, 120o 6’ 8” E), Melak District, Kutai, East Kalimantan, Indonesia. Descriptive and multivariate Analyses were used to reveal the variation and distinctive characters o...

Rodents are important ecological components of virtually every terrestrial ecosystem. Their success is a result of their gnawing incisors, battery of grinding molars and diastema that spatially and functionally separates the incisors from the molars. Until now these traits defined all rodents. Here, we describe a new species and genus of shrew-rat...

Kubah and Santubong National Parks are among Sarawak's heritage ecological treasures, featuring diverse land and water ecosystems that are vital to state and national biodiversity. The conservation and preservation of these parks is crucial for maintaining the sustainability of the environment and ensuring that future generations can continue to be...

Communities that occupy similar environments but vary in the richness of closely related species can illuminate how functional variation and species richness interact to fill ecological space in the absence of abiotic filtering, though this has yet to be explored on an oceanic island where the processes of community assembly may differ from contine...

It remains unclear how variation in the intensity of sperm competition shapes phenotypic and molecular evolution across clades. Mice and rats in the subfamily Murinae are a rapid radiation exhibiting incredible diversity in sperm morphology and production. We combined phenotypic and genomic data to perform phylogenetic comparisons of male reproduct...

Climate change poses significant challenges to ecosystems globally, demanding innovative methods for environmental conservation and restoration. Restoration initiatives require significant amounts of appropriate vegetation that is both adaptive and tolerant to the specific environmental factors. This study introduces an adaptive-vegetation model de...

Correlations between natural geographic boundaries and variations in organisms' morphology have been well-documented in Sulawesi Island, which has a unique geological history and hundreds of endemic species. One of the widely distributed species of small mammals is Sulawesi giant rat (Paruromys dominator). Considering the geographic condition of Su...

We describe 3 new species of shrews (Eulipotyphla, Soricidae, Crocidura) from West Sumatra, Indonesia. Two of these taxa were found above 1,800 m on Mt. Singgalang. The third taxon was found above 1,660 m on Mt. Talamau, 65 km northwest of Mt. Singgalang. We also resurrect Crocidura aequicauda based on 2 specimens from Mts. Tujuh and Kerinci, which...

Natural history museums are vital repositories of specimens, samples and data that inform about the natural world; this Formal Comment revisits a Perspective that advocated for the adoption of compassionate collection practices, querying whether it will ever be possible to completely do away with whole animal specimen collection.

Sperm competition can drive the rapid evolution of male reproductive traits, but it remains unclear how variation in sperm competition intensity shapes phenotypic and molecular diversity across clades. Old World mice and rats (subfamily Murinae) comprise one of the most rapid mammalian radiations and exhibit incredible diversity in sperm morphology...

Background Empirical field studies allow us to view how ecological and environmental processes shape the biodiversity of our planet, but collecting samples in situ creates inherent challenges. The majority of empirical vertebrate gut microbiome research compares multiple host species against abiotic and biotic factors, increasing the potential for...

Faunivorous mammals with simple guts are thought to rely primarily on endogenously produced enzymes to digest food, in part because they lack fermentation chambers for facilitating mutualistic interactions with microbes. However, variation in microbial community composition along the length of the gastrointestinal tract has yet to be assessed in fa...

Field biology is an area of research that involves working directly with living organisms in situ through a practice known as “fieldwork.” Conducting fieldwork often requires complex logistical planning within multiregional or multinational teams, interacting with local communities at field sites, and collaborative research led by one or a few of t...

Communities that occupy similar environments but vary in the richness of closely related species can illuminate how functional variation and species richness interact to fill ecological space in the absence of abiotic filtering, though this has yet to be explored on an oceanic island where the processes of community assembly may differ from contine...

Field biology is an area of research that involves working directly with living organisms in situ through a practice known as “fieldwork.” Conducting fieldwork often requires complex logistical planning within multiregional or multinational teams, interacting with local communities at field sites, and collaborative research led by one or a few of t...

Background: Empirical field studies allow us to view how ecological and environmental processes shape the biodiversity of our planet, but collecting samples in situ creates inherent challenges. The majority of empirical vertebrate gut microbiome research compares multiple host species against abiotic and biotic factors, increasing the potential for...

After nearly a decade of field inventories in which we preserved voucher specimens of the small terrestrial mammals of Sulawesi, we combined qualitative and quantitative analyses of morphological traits with molecular phylogenetics to better understand the diversity of shrews (Soricidae: Crocidura) on the island. We examined the morphology of 1368...

Manuscript Summary 38th Citations and 445 Reads from 2013 to 2021 in RG.

Adaptive radiations are characterised by the diversification and ecological differentiation of species, and replicated cases of this process provide natural experiments for understanding the repeatability and pace of molecular evolution. During adaptive radiation, genes related to ecological specialisation may be subject to recurrent positive direc...

Oposum layang atau sugar glider (Petaurus breviceps) merupakan salah satu satwa endemik Indonesia. Permintaan akan satwa eksotis ini sebagai hewan peliharaan terus meningkat namun informasi terkait potensi zoonosis yang ditimbulkannya masih sangat terbatas. Penelitian ini bertujuan untuk mendeteksi dan mengidentifikasi bakteri patogen yang dibawa o...

Sugar glider (Petaurus breviceps) is one of the endemic animals of Indonesia. The demand for these exotic animals as pets continues to increase, but information regarding their potential zoonoses is very limited. This study aims to detect and identify pathogenic bacteria carried by sugar glider through a culture-dependent method and to determine ph...

Sugar glider (Petaurus breviceps) is one of the endemic animals of Indonesia. The demand for these exotic animals as pets continues to increase, but information regarding their potential zoonoses is very limited. This study aims to detect and identify pathogenic bacteria carried by sugar glider through a culture-dependent method and to determine ph...

We documented preliminary study of coat color variations within Maxomys, one of the most common rats in the Southeast Asian region. We sampled the skin specimens that mostly deposited at Museum Zoologicum Bogoriense, Indonesia. Quantitative measurements of coat color using spectrophotometer revealed no significant difference in the dorsal pelage sh...

BACKGROUND AND OBJECTIVES: The classification of marine animals as protected species makes data and information on them to be very important. Therefore, this led to the need to retrieve and understand the data on the event counts for stranded marine animals based on location emergence, number of individuals, behavior, and threats to their presence....

The relationship between organismal function and form is a cornerstone of biology because functional diversity is key to generating and maintaining ecological diversity. Morphological changes often occur in unison with behavioral or ecological transitions, and this process may foster diversification, but alternately could trap a species on an adapt...

Discus on several mammals species in Java island

Sulawesi is the largest, most topographically complex island in the Wallacean biogeographic zone, and it has a rich fauna of endemic small mammals, dominated by rodents of the family Muridae. Among murids, the Bunomys division is the most species‐rich radiation on Sulawesi. In total, the division contains 11 genera and 32 species, five and 20 of wh...

Buku ini berisi 52 spesies mamalia terpilih di Pulau Jawa dengan kriteria endemik, status konservasi, peran alamiah penting dan keunikannya; dilengkapi dengan nama ilmiah, nama lokal, gambar dan peta sebaran. Ditulis secara rinci dengan gaya bahasa yang sederhana dan lugas sehingga mudah dipahami berbagai kalangan. Detail informasi yang disajikan d...

Albinism, a congenital disorder that results in a lack of melanin deposition, is common in domesticated animals but rare in nature. Among the ∼2500 species of rodents worldwide, only 67 have published reports of albinism. Here we report the capture of an albino murid (Muridae: Rodentia) from Mt. Singgalang in West Sumatra, Indonesia. The specimen i...

The Indonesian island of Sulawesi is a globally significant biodiversity hotspot with substantial undescribed biota, particularly blood-borne parasites of endemic wildlife. Documenting the blood parasites of Sulawesi's murine rodents is the first fundamental step towards the discovery of pathogens likely to be of concern for the health and conserva...

This study analyzed the existence of mammal species in the life story of the Buddha carved in 120 panels of Lalitavistara relief in Borobudur Temple. The story of Buddha's life begins in Tusita and ended by first teaching to establish his teaching career. The story is divided into 5 main section and the presence of mammals in each section implies i...

Supplementary figure 4. Dorsal (A) and ventral (B) view of the holotype skins of Sundasciurus lowii (NHM76.5.2.14), Sundasciurus natunensis (NHM94.9.28.40), Sundasciurus robinsoni (NHM3.2.6.55) and Sundasciurus fraterculus (NHM95.1.9.12). Photographs of live specimens: (C) Sundasciurus robinsoni (taken in Sumatra; photo credits: Oscar Johnson), (D)...

Supplementary figure 5. Bivariate plots of selected external measurements and diagnostic craniodental dimensions. (A) shows tail length versus head and body length; (B) shows ear length versus occipitonasal length; (C) shows breadth of bony palate at fourth premolar versus length of bony palate ; (D) shows height of braincase versus occipitonasal l...

Taxonomic studies on genus Trachypithecus in Indonesia define that this genus separated into two species: Trachypithecus auratus and Trachypithecus cristatus. The aim of this study is to determine relative brain size differences between species of the genus Trachypithecus in Indonesia. This study analyzes the brain volume between both species and e...

A surprising amount of hidden phylogenetic diversity exists in the small to medium size, drab colored squirrels of the genus Sundasciurus. This genus is endemic to Sundaland and the Philippines, where it is widespread. An earlier revision of this genus found that the high elevation ‘populations’ of the widespread, lowland slender squirrel (S. tenui...

Carrion beetle (Coleoptera: Silphidae) is one of the scavengers which obtain nutrition from carcass decomposition which supported by the microbial symbionts through the mutual symbiosis. In this study, we characterized and compared the gut microbial community from the species of Nicrophorinae (Nicrophorus distinctus Grouvelle, 1885) and Silphinae (...

Olfaction and thermoregulation are key functions for mammals. The former is critical to feeding, mating, and predator avoidance behaviors, while the latter is essential for homeothermy. Aquatic and amphibious mammals face olfactory and thermoregulatory challenges not generally encountered by terrestrial species. In mammals, the nasal cavity houses...

The main priority of UNESCO MAB program is to emphasize the implementation of biosphere reserve concept for achieving sustainable development. Biosphere reserve is a concept of site management to harmonize the needs for conservation of both land and coastal ecosystem with the need for economic development in the basis of research on the utilization...

PREFACE TO THIRD EDITION This book is a third edition of checklist of the Mammals of Indonesia. The new edition provides remarkable information in several ways compare to the first and second editions, the remarks column contain the abbreviation of the specific island distributions, synonym and specific location. Thus, in this edition we are also...

This book is a third edition of checklist of the Mammals of Indonesia. The new edition provides remarkable information in several ways compare to the first and second editions, the remarks column contain the abbreviation of the specific island distributions, synonym and specific location. Thus, in this edition we are also corrected the distribution...

We describe a new species of Crocidura (Soricidae) from Sulawesi Island, Indonesia, documenting its novelty with both genetic and morphological characters. The new species is widespread on the island, with vouchered records from nine general localities distributed among five of the island's areas of endemism. Morphologically, the new species is rea...

Aim To determine the historical dynamics of colonization and whether the relative timing of colonization predicts diversification rate in the species‐rich, murine rodent communities of Indo‐Australia. Location Indo‐Australian Archipelago including the Sunda shelf of continental Asia, Sahul shelf of continental Australia, the Philippines and Wallac...

Arboreal locomotion allows access to above-ground resources and might have fostered the diversification of mammals. Nevertheless, simple morphological measurements that consistently correlate with arboreality remain indefinable. As such, the climbing habits of many species of mammals, living and extinct, remain speculative. We collected quantitativ...

During the last 20 years, 213 native species of vertebrate (124 reptiles, 70 birds and 19 mammals) were traded as live, skin or meat from Indonesia. Within the taxon, reptiles are the most traded even for life, meat or skin. For the live source, most of them are exported to the European Union as a pet and the ton of meats was exported to China.

Turbinal bones are key components of the mammalian rostrum that contribute to three critical functions: (1) homeothermy, (2) water conservation and (3) olfaction. With over 700 extant species, murine rodents (Murinae) are the most species-rich mammalian subfamily, with most of that diversity residing in the Indo-Australian Archipelago. Their evolut...

Indonesia merupakan salah satu negara di dunia yang kaya akan jumlah dan jenis sumber daya hayatinya (bioresources). Keanekaragaman sumber daya hayati menunujukkan berbagai variasi mahluk hidup di suatu daerah dalam bentuk struktur tubuh, warna, jumlah dan sifat lainnya. Sumber daya hayati tersebut meliputi flora, fauna dan mikroorganisme. Indonesi...

This book entitled Ekspedisi Sulawesi Barat: Flora, Fauna, dan Mikroorganisme Gandangdewata is present as the first step to inform the potential of biological resources on Mount Gandangdewata and its surroundings related to food sources, medicinal ingredients, and renewable energy. This book also reveals the biodiversity on Mount Gandangdewata, bot...

Aim The Indonesian island of Sulawesi is home to thousands of endemic terrestrial animal species. Phylogeographical studies of some of these taxa revealed concordant distribution patterns (areas of endemism; AoEs), suggestive of a shared evolutionary or ecological mechanism driving divergence among various terrestrial taxa. Generally, AoEs have bee...

It is widely accepted that in mammals a causal relationship exists between postcopulatory sexual selection and relative testes mass of the species concerned, but how much it determines sperm size and shape is debatable. Here we detailed for the largest murine rodent tribe, the Rattini, the interspecific differences in relative testes mass and sperm...

Phylogeographic research on endemic primates and amphibians inhabiting the Indonesian island of Sulawesi revealed the existence of seven areas of endemism (AoEs). Here, we use phylogenetic and population genetic analyses of one mitochondrial gene and 15 nuclear loci to assess geographic patterns of genetic partitioning in a shrew (Crocidura elongat...

We describe a new species of shrew (Soricomorpha, Soricidae, Crocidura) from Mt. Gede, West Java, Indonesia. Relative to other Javan shrews, the new species is small with a relatively thick, dark brown, medium-length tail. The new species is known only from the type locality at 1,611 and 1,950 m elevation on Mt. Gede. It occurs syntopically with at...

Island systems are important models for evolutionary biology because they provide convenient, discrete biogeographic units of study. Continental islands with a history of intermittent dry land connections confound the discrete definitions of islands and have led zoologists to predict (1) little differentiation of terrestrial organisms among contine...

We document a new genus and species of rodent (Muridae) from the west-central region of Sulawesi Island, Indonesia. The new taxon is known only from the type locality at around 1,600 m elevation on Mt. Gandangdewata of the Quarles Range, in the district of Mamasa. With phylogenetic analyses of DNA sequences from 5 unlinked loci, we infer that the n...

Convergent evolution, often observed in island archipelagos, provides compelling evidence for the importance of natural selection as a generator of species and ecological diversity. The Indo-Australian Archipelago (IAA) is the world's largest island system and encompasses distinct biogeographic units, including the Asian (Sunda) and Australian (Sah...

The Indonesian Archipelago harbors unique fauna with a high level of species diversity and endemism. In this report, we provide basic information on the spatial and temporal aspects of the animal ecosystem in the Indonesian Islands. We discuss four zoogeographic topics, including (1) lineage dispersal events from the continents to the Islands,...

We document a new genus and species of shrew rat from the north peninsula of Sulawesi Island, Indonesia. The new taxon is known only from the type locality at 1,600 m elevation on Mt. Dako, in the district of Tolitoli. It is distinguished from all other Indonesian murines by its large, flat, pink nose with forward-facing nares. Relative to other Su...

We collected specimens of Sommer's Sulawesi shrew-rat, Sommeromys macrorhinos, at three sites (1600, 2200, and 2600 m) and the Sulawesi small-bodied shrew-rat, Crunomys celebensis, at one site (1600 m) on Gunung Gandangdewata in the western block of the central core of Sulawesi during November 2011 and May 2012. Prior to 2011, S. macrorhinos was kn...

We document the existence of a new species of shrew (Soricomorpha, Soricidae, Crocidura) in West Java, Indonesia, using both morphological and genetic data. Relative to other Southeast Asian Crocidura, the new species is medium-sized with a slender body and long tail, which together readily distinguish it from all other Javan shrews. Morphological...

Background/Question/Methods We conducted a multi-year terrestrial vertebrate (2009-2011) survey along an elevational gradient in the Masembo River watershed of the Mekongga Mtns. region in Southeast Sulawesi, Indonesia. This area has never been comprehensively surveyed for vertebrate diversity before. Sulawesi supports the highest level of verteb...

21 species of mammals were recorded

A specimen of the rare Lesser Tailless Roundleaf Bat, Coelops robinsoni was caught at the mouth of Lobang Gan Kira, one of the entrances to Niah Cave, Niah National Park (NNP) on 15 th November 2008. This bat is a new record for the park and only the third record for Malaysian Borneo, the previous records being from the Deer Cave, Mulu and Sarawak...

The assessment of bats diversity from two limestone forests in protected areas of Sarawak, the Niah National Park (NP) and the Wind Cave Nature Reserve (NR) were conducted from November 2007 until April 2009. The assessments were aimed to update the current diversity of bats as well as to compile their composition with previous studies done at sele...

The morphological study was focused on the analysis of morphometric variations of the spiny rats (Maxomys Jentink) across their Indonesian and Malaysian ranges in order to clarify the taxonomic status of this genus. The genus was widespread throughout South Asia, and many taxa (species and subspecies) have been described. Univariate and multivariat...

This poster described on the small mammals observed in Lanjak Entimau, Sarawak, Malaysia.

Mamalia yang dilindung perundang-undangan Indonesia disusun berdasarkan peaturan semenjak pemerintah Hindia Belanda melalui Peraturan Perlindungan Binatang Liar 1931, berbagai surat keputusan Menteri Pertanian, Menteri Kehutanan dan Peraturan Pemerintah 1999. Buku ini memuat nama ilmiah, sinonim, dama daerah, peraturan yang mendukung peraturan perl...

Thirty specimens of Rattus collected from Gag Island, Papua were compared directly with two specimens from Gebe Island, one from Salawati Island and six specimens from mainland of Papua. All cranial, dental, dentary and external characters were measured and analysed using multiple regression and discriminant function. The multiple regression showed...