Island Southeast Asia Research Articles

The Excavation of Gua Harimau's Western Gallery: A Contribution to the Terminal Pleistocene-Early Holocene archaeological records in Sumatra

Gua Harimau (gua=cave) is a crucial site for understand the prehistory of Sumatra and its relationship to the peopling of Insular Southeast Asia. A large number of archaeological records has been discovered at the western part of the cave, including human burials, lithic artefacts, potteries, and faunal remains that have been anthropogenically altered. The chronological stratigraphy of these records extends to the Late Pleistocene Period, enabling us to reconstruct the dynamics of prehistoric culture in Sumatra. At least three episodes of human occupation have been recognized in the cave: The Preneolithic, Neolithic, and Paleometalic (early metal age). However, the distributional pattern of various archaeological remains, such as mollusk shells, ground tools, unifacially-shaped pebble tools, and bone artefacts, reveals significant differences. These differences provide insight into the cultural development that occurred in Sumatra during the prehistoric occupation of Gua Harimau, and demonstrate changes in cultural affinity that may correspond to past environmental conditions and human adaptation.

The Exploitation of Toxic Fish from the Terminal Pleistocene in Maritime Southeast Asia: A Case Study from the Mindoro Archaeological Sites, Philippines.

Representatives of the Diodontidae family (porcupinefish) are known to have been fished by prehistoric Indo-Pacific populations; however, the antiquity of the use of this family is thus far unknown. We report here on the presence of Diodontidae in the archaeological sites of Bubog I, II, and Bilat in Mindoro, Philippines, dating back to c. 13,000 BP (Before Present). This evidence demonstrates the early exploitation by islanders of poisonous fish. Every part of porcupinefish can be toxic, but the toxicity is mostly concentrated in some organs, while other parts are edible. The continuous presence of Diodontidae remains throughout the stratigraphic record of these Philippines shell middens suggests that porcupinefish were prepared by human inhabitants of the sites to render them safe for consumption, indicating an advanced cultural knowledge of the preparation needed to separate the toxic principle from the edible parts. This constitutes one of the rare examples of poison processing by humans, aside from the contentious wooden stick poison applicator from Border Cave (South Africa).

Reanalyzing the genetic history of Kra-Dai speakers from Thailand and new insights into their genetic interactions beyond Mainland Southeast Asia

Thailand is a country where over 60 languages from five language families (Austroasiatic, Austronesian, Hmong-Mien, Kra-Dai, and Sino-Tibetan) are spoken. The Kra-Dai language family is the most prevalent, and Thai, the official language of the country, belongs to it. Previous genome-wide studies on Thailand populations revealed a complex population structure and put some hypotheses forward concerning the population history of the country. However, many published populations have not been co-analyzed, and some aspects of population history were not explored adequately. In this study, we employ new methods to re-analyze published genome-wide genetic data on Thailand populations, with a focus on 14 Kra-Dai-speaking groups. Our analyses reveal South Asian ancestry in Kra-Dai-speaking Lao Isan and Khonmueang, and in Austroasiatic-speaking Palaung, in contrast to a previous study in which the data were generated. We support the admixture scenario for the formation of Kra-Dai-speaking groups from Thailand who harbor both Austroasiatic-related ancestry and Kra-Dai-related ancestry from outside of Thailand. We also provide evidence of bidirectional admixture between Southern Thai and Nayu, an Austronesian-speaking group from Southern Thailand. Challenging some previously reported genetic analyses, we reveal a close genetic relationship between Nayu and Austronesian-speaking groups from Island Southeast Asia (ISEA).

Climate, not Quaternary biogeography, explains skull morphology of the long-tailed macaque on the Sunda Shelf

Sundaland, comprising the low-lying Sunda Shelf, the major islands of Borneo, Sumatra, and Java, as well as many smaller surrounding islands, formed a contiguous landmass through much of the Pliocene and Pleistocene. Subsequent late-Pleistocene rising sea levels have often been invoked as major zoogeographic barriers to gene flow and associated phenotypic and taxonomic divergence of Sundaic mammals. However, previous examinations of mammalian biogeography have painted a complex picture, suggesting that mammalian diversification in the region cannot easily be explained by a single overarching biogeographical phenomenon. Instead, it may be that the significant climatic changes and their concomitant impacts on local environments were the more significant control. In this context, we study adult skull morphology of a widely distributed primate in insular and continental Southeast Asia, the long-tailed macaque (Macaca fascicularis), using a 3D geometric morphometric (GM) approach. We used principal component analysis and linear discriminant function analysis to analyze the associations between morphological divergence and island biogeography, taxonomy, and phylogeny. Reduced rank regressions (RRR) were employed to investigate associations with climate of the present and last interglacials and the last glacial maximum (LGM). There was very poor morphological divergence and discrimination among specimens from different biogeographical zones. There was also large overlap between M. fascicularis subspecies in skull size and shape, with M. f. fascicularis occupying the largest range of size and shape variation, consistent with its wide geographical distribution. Nonetheless, sundaic M. f. fascicularis and M. f. philippinensis, restricted to the Philippines, were successfully discriminated on size and shape, supporting the latter as a valid subspecies. There was moderate morphological differentiation associated with the deepest split in mitochondrial DNA lineages (M. f. aureus versus the rest) in skull size and shape. Contrary to biogeography, we detected strong associations between skull morphology and climate. Skull form (size and shape combined) was better explained by climate closer to present conditions and correlated most strongly with the current interglacial, even though past climatic conditions do show correlations with cranial morphology. We found no strong evidence that cranial and mandibular variation in M. fascicularis consistently tracks insularity caused by Quaternary sea level change. Instead, the morphological overlap evident in our sample indicates connections between subspecies and is consistent with the history of Sundaland as a single landmass for large portions of the Quaternary.

Molecular Characterization of Dengue Virus Strains from the 2019-2020 Epidemic in Hanoi, Vietnam.

Dengue virus (DENV), which has circulated in Vietnam for several decades, has multiple serotypes and genotypes. A 2019 dengue outbreak resulted in a larger number of cases than any other outbreak. We conducted a molecular characterization using samples collected in 2019-2020 from dengue patients in Hanoi and nearby cities located in northern Vietnam. The circulating serotypes were DENV-1 (25%, n = 22) and DENV-2 (73%, n = 64). Phylogenetic analyses revealed that all DENV-1 (n = 13) were genotype I and clustered to local strains circulating during the previous outbreak in the 2017, whereas DENV-2 consisted of two genotypes: Asian-I (n = 5), related to local strains from 2006-2022, and cosmopolitan (n = 18), the predominant genotype in this epidemic. The current cosmopolitan virus was identified as having an Asian-Pacific lineage. The virus was closely related to strains in other recent outbreaks in Southeast Asian countries and China. Multiple introductions occurred in 2016-2017, which were possibly from maritime Southeast Asia (Indonesia, Singapore, and Malaysia), mainland Southeast Asia (Cambodia and Thailand), or China, rather than from an expansion of localized Vietnamese cosmopolitan strains that were previously detected in the 2000s. We also analyzed the genetic relationship between Vietnam's cosmopolitan strain and recent global strains reported from Asia, Oceania, Africa, and South America. This analysis revealed that viruses of Asian-Pacific lineage are not restricted to Asia but have spread to Peru and Brazil in South America.

Prehistoric Hunter-Gatherers in the Philippines—Subsistence strategies, adaptation, and behaviour in maritime environments

Archaeological research in the Philippines has produced a timeline of currently over 700,000 years of human occupation. However, while an initial presence of early hominins has been securely established through several radiometric dates between 700 ka to 1 ma from Luzon Island, there is currently little evidence for the presence of hominins after those episodes until c. 67 to 50 ka for Luzon or any of the other Philippine islands. At approximately 40 ka, anatomically modern humans had arrived in the Philippines. Early sites with fossil and/or artifactual evidence are Tabon Cave in Palawan and Bubog 1 in Occidental Mindoro, the latter situated in the Wallacean part of the archipelago. This paper presents an overview of the archaeological research on the prehistory of the Philippines from the Pleistocene until the Late Holocene and the arrival of the first farmers, presumably from Austronesian language groups approximately 4,000 years ago. Research on this topic has significantly intensified over the past 20 years and is providing a variety of evidence for the successful adaptation of those first islanders to maritime environments, the diversity of technological and subsistence strategies, and increasingly complex interrelationships across Island Southeast Asia.

Bronze Fish

Abstract The Bronze Age was a time of pivotal economic change when new long-distance trading networks became associated with a macro-regional division of labour and decentralised political complexity. These developments occurred against the background of a shifting mosaic of subsistence patterns, which included the east-west exchange of crops across Eurasia and (in some areas) greater use of secondary products. As Bronze Age economies became more specialised and diverse, it might be assumed that there was also an increased emphasis on the procurement and trade of fish and other marine resources. However, archaeological analyses of such resources are limited in contrast to land-based subsistence patterns and many questions remain. This essay aims to build a broad interpretive framework for analysing the role of marine resources in the Bronze Age. Our provisional results find that an increased emphasis on specialist systems of agropastoralism reduced the use of marine resources in many parts of Eurasia during this period. However, evidence from Japan and the eastern Mediterranean suggests that, at least in some regions, marine resources became commodities traded over long-distances by the late Bronze Age, though this requires further quantification. Island Southeast Asia displays a different pattern from other regions considered here in a greater continuity of marine resource use from the Neolithic into the historic era, perhaps due to a lower reliance on agropastoralism.

Y chromosome review of the Atayal and Truku Tribes of Taiwan and their relationship with other groups of East and Island Southeast Asia

Background: The Truku indigenous people of Taiwan share strong cultural and genetic relationships with the Atayal tribe. Archaeological and linguistic studies show that their line of descent is associated to Proto-Austronesian speaking groups from Southeast Asia who settled in Taiwan in the early Neolithic, 6000 years ago.

Review: Distant Shores: Colonial Encounters on China’s Maritime Frontier, by Melissa Macauley

Book Review| May 01 2023 Review: Distant Shores: Colonial Encounters on China’s Maritime Frontier, by Melissa Macauley Distant Shores: Colonial Encounters on China’s Maritime Frontier. By Melissa Macauley. ( Princeton University Press, 2021. 376 pp.) Elizabeth Sinn Elizabeth Sinn The University of Hong Kong Search for other works by this author on: This Site PubMed Google Scholar Pacific Historical Review (2023) 92 (2): 320–321. https://doi.org/10.1525/phr.2023.92.2.320 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Elizabeth Sinn; Review: Distant Shores: Colonial Encounters on China’s Maritime Frontier, by Melissa Macauley. Pacific Historical Review 1 May 2023; 92 (2): 320–321. doi: https://doi.org/10.1525/phr.2023.92.2.320 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentPacific Historical Review Search The story of Chaozhouese migration to Southeast Asia, where they have permeated all levels of society, is well-known—but in this thoroughly researched and fluently written book, Macauley offers refreshingly new perspectives on the subject. In broad brush, she provides a deeper and wider picture than ever before by studying a period of several centuries and, spatially, its “frontier” from Shanghai to Hong Kong to continental and island Southeast Asia. Using the idea of “entanglement” to depict the multidimensional interconnectivity of events over time and space, and between the local and the global, she shows critical insights into a complex phenomenon. Yet, the broad brush aside, the minutely detailed information makes this book a gold mine for historians interested in “brotherhoods,” Fang Yao’s qingxiang activities, the “Swatow opium syndicate,” overseas Chinese remittances, and other fascinating topics. Macauley creates a masterly profile of the local official Fang Yao, relatively unknown to scholars,... You do not currently have access to this content.

The Complete Genome Sequence of Cymbopogon citratus (Poaceae, Poales), Lemon Grass.

Cymbopogon citratus, commonly known Lemon Grass, is a tropical plant native to Maritime Southeast Asia. The species has simple, bluish-green leaves with linear white margins. Cymbopogon citratus is abundant in the Philippines and Indonesia where it is traditionally used in cooking. The dried leaves can also be brewed into a tea, either alone or as a flavoring in other teas. We present the complete genome sequence of this species. The raw data and assembled sequences are available in Genbank.

Artifact geochemistry demonstrates long-distance voyaging in the Polynesian Outliers

Although the peopling of Remote Oceania is well-documented as a general process of eastward migrations from Island Southeast Asia and Near Oceania toward the archipelagos of Remote Oceania, the origin and the development of Polynesian societies in the Western Pacific (Polynesian Outliers), far away from the Polynesian triangle, remain unclear. Here, we present a large-scale geochemical sourcing study of stone artifacts excavated from archeological sites in central Vanuatu, the Solomon Islands, and the Caroline Islands and provide unambiguous evidence of multiple long-distance voyages, with exotic stone materials being transported up to 2500 kilometers from their source. Our results emphasize high mobility in the Western Pacific during the last millennium CE and offer insights on the scale and timing of contacts between the Polynesian Outliers, their neighbors in the Western Pacific, and societies of Western Polynesia.

Citrus Genus and its Pharmacological Activities: A Review

Background: This review underscores the global distribution of citrus plants, diverse phytochemical composition, pharmacological properties and their uses. Purpose: This paper reviewed the originating of Citrus genus from northeastern and central Australia, island Southeast Asia, near Oceania, and various subtropical and tropical regions in Asia. Paper elaborates the diverse phytochemical composition of citrus species contributes to their therapeutic characteristics. Citrus fruits, widely consumed and rich in nutrients and phytochemicals, have been linked through epidemiological studies to a reduced risk of several diseases. Methods: The role of citrus plants according to their pharmacological activities explained in the paper with their possible mechanism of action. Results: The citrus fruits contain phenolic acids, flavonoids, and coumarins ac chief chemical constituents. Pharmacologically, the citrus genus exhibits a spectrum of activities, including antioxidants, hypoglycaemic, antimicrobial, anticancer, antiulcer, anti-inflammatory, analgesic, anthelmintic, hepatoprotective, hypolipidemic, estrogenic, and neuroprotective effects. Conclusions: Citrus plants have been shown in traditional and ethno medicinal literature to be especially beneficial in a variety of diseases.

André Wink. The Making of the Indo-Islamic World, c. 700–1800 CE.

Among the polities and cultures of Islam, the realms east of Baghdad have received increasing attention since the publication of Marshall Hodgson’s monumental Venture of Islam (1975), which offered an unprecedented panorama of the histories of the three “great empires” of the Ottomans, Safavids, and Mughals. Since then, historians have continuously reshaped the geographic frame of analysis beyond the boundaries of the contemporary national states in which the histories of these empires had heretofore been written, whether the “Balkans to Bengal” complex proposed by Shahab Ahmed or the “Persianate Cosmopolis” described by Richard Eaton. An inventive and exciting attempt in this vein is promised in the work under consideration, itself a distillation of the author’s monumental Al-Hind: The Making of the Indo-Islamic World (1990–), a five-volume history (three so far completed) of what the author has described as the Indo-Islamic world. The frame is not limited (as is conventional) to the Indian subcontinent but aims to integrate the diverse landscapes around the Bay of Bengal and maritime Southeast Asia. Wink argues that the region was recognized as integrally comprised of Indias of various numbers and designations by Hellenic, Arabic, and European geographers, and marked, before the advent of Islam c. 700 CE, by Hindu and Buddhist polities. It was defined by two great frontiers: one, an arid zone dominated by nomads from central to south-central Asia (present-day Afghanistan), and the other, more amorphous maritime frontier of the Indian Ocean. Dominated by these zones of fluidity and mobility lay the settled agrarian inland and island states of the region. The nomadic conquest of the subcontinent in the early second millennium and the seaborne expansion of itinerant traders led to the birth of postnomadic Islamic subcontinental polities and commercially oriented maritime Muslim kingdoms; both these great frontiers closed with the consolidation of colonial power in the region by the beginning of the nineteenth century.

Moluccan Fighting Craft on Australian Shores: Contact Rock Art from Awunbarna, Arnhem Land

Two similar watercraft depicted in rock art at Awunbarna, Arnhem Land, Australia, are unlike the Macassan prahus and Western craft shown at other contact sites in northern Australia, but are sufficiently detailed to offer evidence for identification. Both craft appear to display triangular flags, pennants, and prow adornments indicating martial status. By comparing these two depictions with historically recorded watercraft from Island Southeast Asia, their probable origin is shown to have been eastern Maluku Tenggara in Indonesia. These motifs provide the first known direct archaeological evidence for ethnic diversity for the origins of mariners from Island Southeast Asia other than Makassar, Sulawesi. The rock-art depictions are representative of ceremonially decorated fighting craft used to lead trading voyages and raids, and may be linked to trade, fishing, resource exploitation, or slavery. This potentially unique identification of Moluccan watercraft in Arnhem Land rock art offers evidence of the elusive encounters between the Indigenous people of northern Australia and people from the archipelagos to the north, evidence with which to expand both the nature and context of Australia’s contact narrative.

The Filaments of the Textile Trade: Subtle and Broad Trends in Exports from South Asia to Maritime Southeast Asia

This essay uses an eighteenth-century patolu—a fine silk double-ikat textile—as the jumping-off point to explore the complex trading relationship between South Asia and the islands of maritime Southeast Asia. Using the Dutch Textile Trade Project’s data and visualizations, this essay considers the loosening connections between specific localities (including Gujarat, the Coromandel Coast, and Bengal) and their characteristic textiles in South Asia in the early eighteenth century. The commerce in textiles was further transformed by the rise of the opium trade, a commodity for which the Dutch East India Company (VOC) had established a monopoly by the eighteenth century.

The Making of a Periphery: How Island Southeast Asia Became a Mass Exporter of Labor

The Making of a Periphery: How Island Southeast Asia Became a Mass Exporter of Labor

Genomic analysis of Bornean geckos (Gekkonidae:Cyrtodactylus) reveals need for updated taxonomy

AbstractUsing molecular genetic data, recognised diversity within the gecko genusCyrtodactylushas more than doubled, with many lineages that were once thought to be wide‐ranging being delimited into multiple independent species. On the Southeast Asian island of Borneo, there has been a recent renewed focus on reptile taxonomy, as genetic data have demonstrated a high amount of unrecognised biodiversity. We herein advance this taxonomic trend by delimiting three distinct species within theCyrtodactylus consobrinusspecies complex:C. consobrinus, C. kapitensissp. n., andC. hutansp. n. To do so, we use a combination of ddRADseq and single‐locus data, and morphological data. Using genomic data, we test species and population boundaries within theconsobrinusspecies complex and show minimal population structure but high species‐level diversity. Despite not finding uniquely diagnostic morphological characters to delimit the new species, we suggest a combination of characters that can be used to identify each lineage. Lastly, we use our data to comment on the status ofC. malayanus, with indications that this lineage is also better considered a species complex. These data highlight the prevalence of unrecognised lineages on Borneo, many of which face threats due to increasing deforestation and other anthropogenic pressures.

Thousands of years of Malay and Chinese population history in Indonesia and its implication on Paternity Index in DNA paternity testing

The existence of the Chinese population in the predominantly Malay population in Indonesia can be traced back thousands of years, and it has been suspected that it played an essential role in the history of the Malay population origin in Maritime South East Asia. With the fact that the Malay-Indonesian population is currently predominant compared to the Chinese population in Indonesia (Chinese-Indonesian), the selection of the origin of the STRs allele frequency panel population becomes an issue in DNA profiling, including in paternity testing. This study analyses the genetic relationship between the Chinese-Indonesian and Malay-Indonesian populations and how this affects the Paternity Index (PI) ​​calculation in paternity test cases. The study of the relationship between populations was carried out using neighbour-joining (NJ) tree analysis and multidimensional scaling (MDS) on the allele frequency panel of 19 autosomal STRs loci of Malay-Indonesian (n = 210) and Chinese-Indonesian (n = 78) populations. Four population groups were used as references: Malay-Malaysian, Filipino, Chinese, and Caucasian. An MDS analysis was also performed based on the pairwise FST calculation. The combined Paternity Index (CPI) calculation was carried out on 132 paternity cases from the Malay-Indonesian population with inclusive results using a panel of allele frequencies from the six populations. The pairwise FST MDS indicates a closer relationship between the Chinese-Indonesian and Malay-Indonesian compared to the Chinese population, which is in line with the CPIs comparison test. The outcome suggests that the alternative use of allele frequency database between Malay-Indonesian and Chinese-Indonesian for CPI calculations is not very influential. These results can also be considered in studying the extent of genetic assimilation between the two populations. In addition, these results support the robustness claim of multivariate analysis to represent phenomena that phylogenetic analyses may not be able to demonstrate, especially for massive panel data.

Diversity and distribution of mitochondrial DNA in non-Austronesian-speaking Taiwanese individuals

Many studies have described the diversity of Austronesian-speaking Taiwanese people to shed more light on their origin and their connection with the “Out of Taiwan” migrations. However, the genetic relationship between the non-Austronesian-speaking groups of Taiwan and the populations of continental Asia is still unclear. Here, we studied the diversity of mtDNA in 767 non-Austronesian speakers from 16 locations in Taiwan using partial sequencing obtained from the hypervariable segment I (HVS-I) and coding regions 8,001-9,000 and 9.801–10,900 and 85 complete mtDNA genome sequences. Bayesian analysis of population structure was used to examine their relationship with over 3662 individuals representing indigenous groups of Taiwan, continental East Asia, Japan, and Island Southeast Asia. The whole analysis identified 278 haplotypes. Complete genomes revealed 62 novel subhaplogroups, of which 31 were exclusive to Taiwan. Estimates of coalescence times of all subhaplogroups showed peaks of diversification greater than 5.0 kya, likely characterizing gene flow from continental East Asian groups but not excluding in situ Taiwanese ancestry. Furthermore, a significant number of clades exclusive to non-Austronesian speakers of Taiwan (NAN_Tw) showed coalescence peaks between 1.0 and 2.6 kya, suggesting possible late Neolithic to early metal age settlements of NAN_Tw and local expansion in Taiwan.

Why did the chicken cross the Wallace Line? Archeological evidence suggests human‐mediated dispersal of Gallus to Flores first occurred at least ~2.25 ka cal. BP

AbstractDomesticated chickens (Gallus gallus domesticus) are a dominant part of the global human diet. Although the early domestication history of this species remains disputed, Mainland Southeast Asia (MSEA) is assumed to have been the initial domestication center. The eastward spread of chickens into Island Southeast Asia (ISEA) and the Pacific is typically attributed to human‐mediated dispersals. Chicken remains are relatively common at Pacific Neolithic sites but are extremely rare in the archaeological records of MSEA and ISEA. Therefore, the exact routes and timing of the human‐mediated spread of chickens from their native range in MSEA into the Pacific remain questions of interest. Here, we present the earliest evidence of Gallus on the Indonesian island of Flores at Liang Bua. This site has yielded an extensive stratigraphic sequence that spans from ~190,000 calendar years (ka) ago until the present and includes dense accumulations of faunal remains. Twelve bones from the cave's Holocene deposits have been identified as Gallus. The oldest remains, a right and left coracoid, were each directly dated to ~2,250 calibrated radiocarbon years before present (ka cal. BP), whereas the youngest Gallus elements are ~0.3 ka old. Although wild Green Junglefowl (Gallus varius) and Red Junglefowl (Gallus gallus) are found on Flores today, the absence of either of these species in deposits at Liang Bua older than ~2.5 ka as well as the size and shape of the oldest coracoids suggests that these remains likely represent domesticated G. gallus. This is the first evidence for domesticated chickens in the Neolithic of Flores and the first directly dated Gallus remains in Wallacea. The absence of chickens in the fossil record of ISEA suggests that Red Junglefowl (and perhaps Green Junglefowl also) reached Wallacea via human‐mediated dispersal(s) at least ~2.25 ka cal. BP.