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... Recent structural changes in dietary patterns in Asia resulting from economic development are placing increasing pressure on the existing production systems in the region‐particularly those systems producing ruminant meat, non‐ruminant meat and milk. This has significant policy implications for the countries in the region in terms of self‐sufficiency goals in these commodities and the associated i ...
... To investigate the phylogenetic relationships among the different strains of the polytypic snail Neotricula aperta, mitochondrial-DNA sequence data were sampled from six populations from central and southern Laos, eastern Cambodia, and northeast Thailand. Part of the cytochrome c oxidase subunit I gene was sequenced for 21 individuals from 7 populations, with a 598 bp sequence used in the analyses ...
... Upland rice (Oryza sativa L.) yields on infertile, acid soils in the Asian uplands average only 1 Mg ha⁻¹ Phosphorus deficiency is considered a major soil constraint to increased yield, but little quantitative information is available. We analyzed P responses of traditional rice on farm in Laos, Thailand, and the Philippines and improved varieties in researcher-managed trials in the Philippines. T ...
sympatry; random amplified polymorphic DNA technique; disease vectors; Anopheles dirus; nucleotide sequences; malaria; chemotaxonomy; Vietnam; Malaysia; Cambodia; Laos; Thailand; China
Abstract:
... The Anopheles dirus Peyton & Harrison complex of mosquitoes (Diptera: Culicidae) comprises seven known species, including important malaria vectors in Southeast Asia. Specific identification of each species of the complex, which cannot be distinguished using morphological characters, is crucial for understanding vector ecology and implementing effective control measures. Derived from individual ra ...
... Edible shoots of rattans are traditionally viewed as non timber forest products. However, in Thailand and Lao PDR (Laos) several shoot-bearing species have recently been adopted as crop plants. This new industry is little known outside the region. A description is given of the process of adoption and the characteristics of the species involved, focussing on Calamus tenuis Roxb., the main species p ...
infrastructure; issues and policy; land rights; land tenure; land use; mountains; ownership; people; population growth; shifting cultivation; Bangladesh; India; Indonesia; Laos; Malaysia; Nepal; Thailand
Abstract:
... Shifting cultivation, which long provided the subsistence requirements of a large number of people in the mountains of South and Southeast Asia under a situation of low population, has been shown to be an environmentally and economically unsuitable practice. Efforts have been made throughout the region to replace it with more productive and sustainable land-use systems. Experiences have been mixed ...
Food and Agriculture Organization; Landsat; databases; forests; habitat fragmentation; land cover; remote sensing
Abstract:
... Question: Can recent satellite imagery of coarse spatial resolution support forest cover assessment and mapping at the regional level?Location: Continental southeast Asia.Methods: Forest cover mapping was based on digital classification of SPOT4-VEGETATION satellite images of 1 km spatial resolution from the dry seasons 1998/1999 and 1999/2000. Following a geographical stratification, the spectral ...
Food and Agriculture Organization; Landsat; forests; habitat fragmentation; land cover; natural resources conservation; normalized difference vegetation index; remote sensing; Mekong River
Abstract:
... Question: Can recent satellite imagery of coarse spatial resolution support forest cover assessment and mapping at the regional level?Location: Continental southeast Asia.Methods: Forest cover mapping was based on digital classification of SPOT4-VEGETATION satellite images of 1 km spatial resolution from the dry seasons 1998/1999 and 1999/2000. Following a geographical stratification, the spectral ...
... Tropical forests, like boreal forests, are considered key ecosystems with regard to climate change. The temperature sensitivity of soil CO₂ production in tropical forests is unclear, especially in eastern Asia, because of a lack of data. The year-round variation in temperature is very small in tropical forests such that it is difficult to evaluate the temperature sensitivity of soil CO₂ production ...
Ascalaphidae; homonym; new species; nomen novum; redescriptions; Laos; Pakistan; Thailand
Abstract:
...
Studying ascalaphid materials from Thailand, Laos and Pakistan the authors determined specimens which belonged to the genus of Nousera. In this paper the redescription of the genus of Nousera and its type species, Nousera gibba Navás, 1923 can be found. Besides Nousera herczigi, a new species from ...
data collection; equations; hydrologic data; least squares; linear models; prediction; rivers; stochastic processes; surface water temperature; time series analysis; Laos; Mekong River; Thailand
Abstract:
... A network using radial basis functions (RBFs) as the mapping function in the evolutionary equation for prediction of time series is presented. An RBF network requires the determination of the number of centres of RBFs, their receptive field widths and the linear weights of the network output layer. Traditionally, the number of centres of RBFs is fixed. In this paper, methods to estimate the widths ...
... The purpose of this study was to assess the extent of genetic erosion of traditional upland germplasm in northern Thailand as a result of gene-flow from distinct strains carrying different genotypes. Even modern variety specific markers have not been developed, there is a comparative population in Laos. Thus, both populations were compared with various characters to evaluate gene-flow from modern ...
phytosterols; cholesterol metabolism; bran; blood lipids; medicinal plants; herbal medicines; Coix lacryma-jobi; cholesterol; proximate composition; chemical constituents of plants; Oriental traditional medicine; Vietnam; Taiwan; Laos; Thailand
Abstract:
... Adlay (Coxi lachrymal-jobi), an annual crop, has long been used in traditional Chinese medicine for its biological activity and as a nourishing food. Its phytochemical composition has been extensively studied; however, information on its policosanol (PC) and phytosterol content is scarce. The objective of this study was to examine and compare the PC, phytosterol and oleamide contents of different ...
... The food-borne trematodes, Opisthorchis viverrini, O. felineus and Clonorchis sinensis, have long been recognized as the cause of major human health problems, with an estimated 40 million infected persons. Of the three species of liver fluke, only O. viverrini is classified as a type 1 carcinogen because of its role as an initiator of chronic inflammation and the subsequent development of cholangi ...
body image; high school students; Whites; obesity; breakfast; linear models; dieting; snacks; snack foods; public schools; middle schools; adolescent nutrition; fast food restaurants; adolescents; physical activity; risk factors; high schools; middle school students; groceries; body mass index; cross-sectional studies; weight control; fast foods; home food preparation; food choices; Minnesota
Abstract:
... Objective: Little is known about the food and weight-related behaviors of Hmong adolescents. This study assessed these behaviors in Hmong adolescents and determined if they differed between Hmong and white teens or by country of birth. Design: School-based cross-sectional study. Subjects/setting: Hmong (n=649) and white (n=2,260) adolescents from 31 public middle and high schools in the Minneapoli ...
DNA; Opisthorchis viverrini; adults; epidemiology; flukes; genetic variation; people; random amplified polymorphic DNA technique; Laos; Thailand
Abstract:
... Genetic variation in Opisthorchis viverrini adults originating from different locations in northeast Thailand and Laos, People’s Democratic Republic (PDR), was examined using random amplified polymorphic DNA (RAPD) analyses. In an initial analysis, the genomic DNA of one fluke from each of ten localities was amplified using 15 random primers (10-mers); however, genetic variation among O. viverrini ...
... Here, I report on how forest area in Southeast Asia has changed for different types of forest and across different countries between the periods of 1990-2000 and 2000-2005. The loss of old growth forests has accelerated in Indonesia, Cambodia and Vietnam but have ceased in Thailand, Malaysia, Laos and the Philippines. Secondary forests continue to be lost in Malaysia, Cambodia, Laos, Myanmar, Indo ...
... Cognetti (1922) miscounted segments of his Megascolex (Promegascolex) mekongianus and, believing the gizzard in 7 was intermediate between Megascolex, with gizzard in 5, and Pheretima, with gizzard after 7/8, he proposed the subgenus Promegascolex. Next, Gates (1934: 260) redescribed the immature, poorly preserved and abnormal type as Pheretima mekongiana. However, Sims & Easton (1972: 223) listed ...
Coleoptera; insect taxonomy; taxonomic revisions; new species; insect morphology; biological nomenclature; type collections; taxonomic keys; geographical distribution; China; Laos; Thailand
Abstract:
... The gemmata species group of Helota MacLeay is revised. Seven species are recognized, including two described herein, H. schuhi sp. nov. from China (Hubei Province) and H. ohbayashii sp. nov. from Laos and Thailand. H. distincta Ritsema and H. ritsemana Heller are placed as junior synonyms of H. fulviventris Kolbe; H. caudata Ritsema is placed as a junior synoym of H. gorhami Olliff. Lectotypes ar ...
rivers; water management; development projects; drought; watersheds; development aid; Vietnam; Cambodia; Laos; Mekong River; Thailand
Abstract:
... Over the past decades the Mekong River basin has experienced several droughts, the most recent of which occurred in the hydrological year 2004/2005. Impacts extended across agriculture, forestry, water resources, supply, industry, transport and the environment. In early 2006, the Mekong River Commission Secretariat initiated close consultations with the MRC member states Cambodia, Lao PDR, Thailan ...
... Three subspecies of banteng (Bos javanicus) have been described: B. j. javanicus in Java, B. j. lowi in Borneo, and B. j. birmanicus in Cambodia, Lao PDR, Myanmar, Thailand and Vietnam. In this paper we provide the first description of the karyotype of the Cambodian banteng. The chromosomal complement of B. j. birmanicus differs from that of B. j. javanicus, which was previously found to be simila ...
... The importance of proper water management means that the consumption of irrigation water should be estimated even in areas where data are scarce. The Mekong River, particularly the lower part, is one area where irrigation water has received little research attention. Studies that seek to estimate the use of irrigation water in this area are restricted by a lack of hydrological data; consequently, ...
... For effective management of a freshwater species, it is necessary to have an understanding of the spatial scale of population differentiation. In many cases, common ecological methods such as mark-recapture are inappropriate for large freshwater systems. In this study, a molecular genetics approach was employed to determine the population structure of a small, but regionally very important, cyprin ...
... The highly pathogenic avian influenza (HPAI) H5N1 virus that emerged in southern China in the mid-1990s has in recent years evolved into the first HPAI panzootic. In many countries where the virus was detected, the virus was successfully controlled, whereas other countries face periodic reoccurrence despite significant control efforts. A central question is to understand the factors favoring the c ...
... Twenty-eight immature hatchery-reared Mekong giant catfish Pangasianodon gigas tagged with acoustic transmitters were released in the Mekong River, Thailand from 2002 to 2004. Twenty-four and four fish were tagged with normal transmitters and pressure-sensitive transmitters, respectively. Five to seven automated monitoring receivers were used for monitoring the post-release movements. The tagged c ...
insect morphology; Coleoptera; geographical distribution; insect taxonomy; taxonomic revisions; type collections; new species; taxonomic keys; Laos; Thailand
Abstract:
... The vigorsii species group of Helota MacLeay is revised. Ten species and one subspecies are recognized, including a new species H. brancuccii described. from Laos and Thailand. The following new synonyms are proposed: H. vandepolli Ritsema, 1891 (=Helota fruhstorferi Ritsema, 1905; H. lugubris Ritsema, 1914); H. servillei Hope, 1840 (=Helota oberthueri Ritsema, 1889); H. scintillans Olliff, 1884 ( ...
... Rapid changes in upland farming systems in Southeast Asia generated predominantly by increased population pressure and 'market forces' have resulted in widespread land degradation that has been well documented at the plot scale. Yet, the links between agricultural activities in the uplands and downstream off-site effects remain largely unknown because of the difficulties in transferring results fr ...
... 1. The stripe-backed weasel Mustela strigidorsa is one of the rarest and least-known mustelids in the world. Its phylogenetic relationships with other Mustela species remain controversial, though several unique morphological features distinguish it from congeners. 2. It probably lives mainly in evergreen forests in hills and mountains, but has also been recorded from plains forest, dense scrub, se ...
sociodemographic characteristics; food security; obesity; adults; traditions; nutrient intake; immigration; health status; risk factors; Southeast Asians; acculturation; psychosocial factors; foodways; lifestyle; body mass index; food intake; food choices; food and nutrition programs; Thailand; Minnesota; Laos
Abstract:
... Focus groups (n =65) were conducted with Hmong adults in St. Paul/Minneapolis, MN to determine how environmental factors, acculturation, and food insecurity influence dietary behavior, body mass index (BMI), and health. Acculturation was assessed by examining linguistic, social, and eating behavior, length of time in the US, and BMI for B-TL¹ (born in Thailand/Laos and in US <=5 years), B-TL² (in ...
cadmium; exports; foods; humans; irrigation canals; issues and policy; latitude; linear models; livelihood; longitude; public health; regression analysis; rice; risk assessment; runoff; soil pH; variance; China; Laos; Myanmar; Thailand; Vietnam
Abstract:
... Research undertaken over the last 40 years has identified the irrefutable relationship between the long-term consumption of cadmium (Cd)-contaminated rice and human Cd disease. In order to protect public health and livelihood security, the ability to accurately and rapidly determine spatial Cd contamination is of high priority. During 2001-2004, a General Linear Regression Model Irr-Cad was develo ...
... Teak (Tectona grandis L.f.) is considered to be an extraordinarily durable building timber with a worldwide reputation. Its widespread use has entailed the over-exploitation of natural forests and a large reduction in natural diversity. Fifteen microsatellite markers were used to study the genetic variability and structure of 166 teak trees distributed over the whole natural area of teak. Analysis ...
... Iodine deficiency remains a major health problem in many parts of Thailand with over 50% of the population lacking sufficient iodine in their diet. Since rice is the main staple for Thai people with rice consumed in one form or another in almost every meal, enrichment of rice with iodine offers an effective way to remedy this deficiency of iodine. The present paper investigates the enrichment of i ...
... The mountainous mainland Southeast Asia region, that covers adjoining parts of Cambodia, Lao PDR, Myanmar, Thailand, Vietnam and China, contains the region's largest remaining tropical forest. The people living in the forested mountains, who belong to a diversity of ethnic minority groups, possess a wealth of local knowledge and skills in forest management. With rapid decrease in forest area, impl ...
... A review of seven studies addressing soil flux related to manual hoeing and weeding in Asia and Africa indicates that tillage erosion from hand-held implements on steep hillslopes can alter topography and influence the distribution of soil and nutrients within fields. Soil flux resulting from manual tillage increases with slope in a near-linear fashion until the slope angle approaches the angle of ...
... Paragonimus bangkokensis and Paragonimus harinasutai were found one after another in the same crab host, Potamon smithianus, in Thailand in 1967 and 1968. Both species were also recently found in China and Lao People's Democratic Republic (PDR). Those two Paragonimus spp. are distinguishable from each other by morphological features of metacercariae and adults. However, recently, the DNA sequences ...
... For centuries swidden was an important farming practice found across the girth of Southeast Asia. Today, however, these systems are changing and sometimes disappearing at a pace never before experienced. In order to explain the demise or transitioning of swidden we need to understand the rapid and massive changes that have and are occurring in the political and economic environment in which these ...
rice; profitability; poverty; Oryza sativa; food security; sugarcane; population growth; farm income; international trade; grain yield; temporal variation; Zea mays; corn; spatial variation; water use efficiency; Saccharum; Mekong River; Thailand; Vietnam; Cambodia; Laos
Abstract:
... We estimate the physical and economic water productivities of rice and upland crops grown in the Lower Mekong River Basin and we examine their spatial and temporal trends. We discuss the constraints to low productivity, suggest measures for improvement and show the future productivity requirements for food security for increased population. Both the physical and economic water productivities of ri ...
... To reconstruct the palaeoenvironments of megafauna-bearing sites from Pleistocene Southeast Asia, and to describe general environmental changes in the region. Indochina and Sundaland, including Myanmar, Laos, Vietnam, Cambodia, Thailand, the Malay Peninsula, Borneo, Sumatra and Java. This study reconstructs the habitat types of 25 Pleistocene sites in Southeast Asia through a synecological (commun ...
... BACKGROUND: During the last decade, Southeast Asian countries have been very successful in reducing the burden of malaria. However, malaria remains endemic in these countries, especially in remote and forested areas. The Leucosphyrus group of the genus Anopheles harbors the most important malaria vectors in forested areas of Southeast Asia. In Vietnam, previous molecular studies have resulted in t ...
... Dipterocarpus wood resin is an important non-timber forest product for the ethnic Brao and Tampuon people from Teun Commune, Ratanakiri Province, northeastern Cambodia. While wood resin tree tenure is typically private, whether in Cambodia, Laos, Thailand, or Malaysia, in Teun Commune wood resin trees are managed privately, by small groups, and communally, thus providing a unique opportunity for c ...
Paradoxosomatidae; new species; phylogeny; Cambodia; China; Laos; Myanmar; Thailand; Vietnam
Abstract:
... The genus Tylopus currently contains 41 species, all keyed and mapped, including five new from northern Thailand: Tylopus bispinosussp. n., Tylopus grandissp. n., Tylopus extremussp. n., Tylopus veligersp. n. and Tylopus parajeekelisp. n. Species of Tylopus are predominantly forest-dwellers, especially in montane habitats where up to 9–10 species can coexist per faunule. We expect many more congen ...
... The speciose genus Limnonectes exhibits a broad range of reproductive behavior and sizes at maturity. Two Southeast Asian species are near the low end of the size range and near one extreme of reproductive habits (their larvae are said to have direct development). Limnonectes hascheanus and L. limborgi are small, having a maximum snout-vent length of less than 40 mm, with reduced webbing and femal ...
... The first introduction of Tectona grandis in Indonesia took place between the fourteenth and sixteenth centuries and in Africa in the nineteenth century. A total of 1.1 and 0.3 million ha, respectively were planted in the two areas. The extension of teak plantations often started from these first introductions. Unfortunately, the documentation concerning dates, planting stocks and the sources of o ...
... There is large year-to-year variation in rice production across the Mekong region (Laos, Cambodia and Thailand) due to uncertainty in the timing of the onset of the wet season and drought stress that may develop at any time during the growth of rainfed lowland rice. Unique to the nature of lowland water balance is a large component of deep percolation water loss, which depends on soil texture. The ...