North Pagai Research Articles

Exploring the Role of Tattoo Discourse in Matotonan Village: Mentawai Tattoo Batik as an Effort to Preserve Tradition in Mentawai

In the remote islands of North Pagai, South Pagai, Sipora, and Siberut, the ancient art of tattooing is on the verge of extinction. However, amidst this cultural decline, a unique endeavor emerges in the heart of Mentawai: the preservation of tattoos through the intricate art of Mentawai tattoo batik. This qualitative ethnographic study delves into the depths dicourse of Mentawai tattoo batik, illuminating its significance in the preservation of Mentawai's rich tattoo heritage. Through meticulous observations across the four islands of Mentawai and in-depth interviews with tattoo owners, particularly the revered Sikerei who lead the sacred Lia rituals, this research uncovers the profound narrative woven within each tattoo motif. In Matotonan Village, once vibrant with tattoo culture, youth no longer hold tattoos in high regard, risking the loss of this ancient tradition. Yet, amidst this cultural shift, Mentawai elders embark on a noble mission: to immortalize the sacred symbols of their ancestors by transferring Mentawai tattoo motifs onto clothing. This symbolic gesture not only safeguards the legacy of Mentawai tattoos but also ensures their transmission to future generations. For the Mentawai people, tattoos transcend mere body art; they embody the sacred connection between humanity and the natural world of Mentawai. As efforts to preserve these timeless symbols gain momentum, batik adorned with Mentawai tattoo motifs emerges as a beacon of hope, igniting a revival of cultural pride and heritage in the heart of Mentawai. Through the production of tattoo motif batik as a burgeoning home industry, the legacy of Mentawai tattoos finds new life, promising to endure for generations to come.

Monitoring of tectonic deformation in the seismic gap of the Mentawai Islands using ALOS-1 and ALOS-2

Ever since the last occurrence of a significant earthquake in the Mentawai megathrust zone in 2000, no significant earthquake events have been recorded, which, according to the earthquake repetition cycle, suggests that the zone is a potential epicenter of future earthquakes. The southern and northern parts of the zone have been struck by a significant earthquake with magnitude M > 8.0; however, in the potential location of the Mentawai Islands, earthquake energy has not been released. This research shows the tectonic activity, velocity, and shift that occurred owing to the thrust of the plate. The information is a vital reference for estimating the epicenter of the earthquake whose energy has not yet been released. We analyzed the tectonic characteristics according to the synthetic aperture radar data and geodetic global positioning system observations. The results show that the Pagai Islands are experiencing consistent tectonic deformations. The northern region of North Pagai and the Northern region of South Pagai are experiencing significant subsidence, while the southwest (SW) region of North Pagai and the south segment of South Pagai are experiencing significant uplift. The government and local authorities can use this information as a guide for developing strategies for disaster preparation.

The Influence of Foreign Cultural Discourse on the Uma Settlement in Mentawai, Indonesia

The entry of foreign cultures into the Mentawai people made the settlements change. The Mentawai people no longer make Uma a social and economic community. This change was due to the existence of housing and the form of houses built by different Governments. This study aimed to look at outside culture's influence on Uma settlements in Mentawai. This qualitative research method uses ethnographic, sociological, and anthropological approaches using observational data collection techniques, documentation studies, and interviews. Data analysis techniques in this study are data reduction, data presentation, and conclusion or verification. The results of this study show that outside culture has a major influence on the Uma settlement in the Mentawai. Nevertheless, the Siberut archipelago is the only archipelago that has survived despite changes in the housing environment and the shape of houses built by the Government with a description of socio-cultural and economic characteristics, which still survive. This condition still applies today. However, in Sikakap, Sipora, North Pagai, and South Pagai all the uma settlements no longer exist. This is caused by the influence of an outside culture that enters Mentawai society. These external cultural influences are as follows: the entry of foreign cultures into the Mentawai islands, the open nature of the Mentawai people, and the modernization of the form of permanent houses to eliminate uma as the original settlement of the Mentawai people.

Rekonstruksi Tsunami Mentawai dengan Menggunakan COMCOT v1.7

Many studies on the Mentawai tsunami have been carried out. Still, not many have reviewed the validation of run-up height compared to the results of field studies in the same year as the Mentawai tsunami on October 25, 2010. The survey of the Mentawai tsunami reconstruction using COMCOT v1.7 aims to validate The tsunami run-up height of the model output was compared with the results of the field study by the GITST Team in 2010. Validation of the model was carried out using the Aida parameter, by calculating the ratio of the comparison between the model output and the field study results. The study location of the model is divided into 3 layers, namely layer01 covering Sipora Island, North Pagai Island, and South Pagai Island, layer02 covering North Pagai Island and South Pagai Island, and layer03 with the focus of observation on Sibigau Island, with bathymetric resolution used for each layer. 464 m, 232 m, and 77 m so that the propagation at the observation site can be seen clearly. The height of the modeled tsunami ranged from 2.5 – 11.2 meters, with a maximum run-up height observed on Sibigau Island of 11.2 meters, and the time range for the tsunami arriving on land was 5 – 15 minutes. The comparison ratio between the model results and the field study is K = 0.9 and k (standard deviation) = 0.16. Based on the comparison ratio, the model output is close to the actual result.

Mapping Coastline Changes In The Mentawai Islands Using Remote Sensing

The Mentawai Islands are an active deformation zone caused by the movement of the Indo-Australian plate under the Eurasian plate at a speed of 5-6 cm/year. The movement of these plates that occur continuously can be a source of earthquake disasters in the future. However, the information on how much the value of the distance to the coastline changes and the direction of the change has not been well mapped. In this study, a mapping of shoreline changes caused by plate movement along the coast in the Mentawai Islands was carried out using Landsat Imagery. The method used in this research is the Overlay method between Landsat Imagery 2005,2010, and 2020 using ArcGIS software and the Digital Shoreline Analysis System (DSAS) which is used to determine the distance between shoreline changes and the direction of the change. Based on the results of the study, it was found that the coast of the Mentawai Islands showed a change in the coastline with the average distance of change, namely Siberut Island of -2,109 m, Sipora Island at -2,979 m, North Pagai Island at -3,282 m, and South Pagai Island -1,557 m. From the results obtained, the distance of significant shoreline changes that occur in South Pagai Island with the direction of change towards the Northeast.

Dynamics of West Coast of Sumatra and Island Arc Mentawai during the Coseismic Phase of the Mentawai Mw7.8 25 October 2010 Earthquake

Sumatra is located along the Sunda megathrust where the Indo-Australian plate subducts beneath the Eurasian plate. This condition provides a favorable setting for the formation of small to large scale earthquakes which can lead to other natural disasters. On October 25, 2010, an Mw7.8 earthquake near Mentawai occurred and followed by a tsunami. The Mentawai Islands and the West Coast of Sumatra’s dynamics were observed before, during, and after the rupture using the Global Positioning System (GPS) technology, widely known as the Sumatran GPS Array (SuGAr) network. RINEX data from several SuGAr’s stations in Mentawai (BSAT, SLBU, PRKB, SMGY, KTET, PPNJ) and West Coast of Sumatra (LNNG, MKMK, LAIS, MNNA) was processed using GAMIT/GLOBK software to obtain the coseismic deformation data. No anomalies were found in the preseismic phase (29 days before the earthquake) that could be used as precursors for the earthquake. The largest deformation was observed at the SLBU station in North Pagai, Mentawai, as a 29.97 cm southwestward coseismic jump and the coseismic jump at the stations in Sumatra (LNNG, MKMK, LAIS, MNNA) was below 3 cm toward the same direction. During the 29 days after the earthquake, plate relaxation at the postseismic phase was observed. This suggest that some period of time is required to recover to its normal deformation trend. This shifted postseismic trend is indicated by a change in the direction of plate movement compared to the preseismic trend.

Focal Mechanism Inversion on the Aftershock Sequence of the 25 October, 2010 Mw 7.8 Mentawai Earthquake: A Preliminary Result

An Mw 7.8 tsunami earthquake ruptured the shallow part of the Mentawai megathrust on 25 October 2010 and generated a large tsunami that hit the Mentawai Islands. The earthquake continued a partial rupture sequence of the 2007 Mw 8.5 and 7.9 Bengkulu earthquake and the 2008 Mw 7.2 North Pagai earthquake. The aftershock activity gives the opportunity to investigate the geometry of the subduction interface, which is critical to understanding the propagation and termination of a large earthquake. However, it is necessary to have a precise location and mechanism of the aftershock distribution to clearly image the fault geometry. In this preliminary study, we have applied the Cut-and-Paste (CAP) focal mechanism inversion method to 20 aftershocks (M ≥ 4.9) of the 2010 Mentawai earthquake. The seismic waveforms recorded by the BMKG broadband seismic network on the regional distance were used in the inversion. They successfully obtained ten focal mechanisms more than that provided in the GCMT catalog. The result exhibits a distinctly different thrust and normal faulting aftershocks activity. The thrust faulting aftershocks are mainly distributed in the downdip of the Mentawai 2010 mainshock rupture, indicating the stresses that have not been released during the mainshock. In the shallow region near the trench, the aftershocks are dominated by a normal faulting mechanism which shows the tensile stress caused by the bending of the subducting plate.

Pangan Lokal Non Beras: Ketahanan Pangan Rumah Tangga pada Era Pandemi Covid-19 di Mentawai

Pandemic Covid-19 impact on a human life one of the food. The policy of the pandemic Covid-19 PSBB (large-scale social restrictions) and PPKM (implementation of restrictions on community activities), disturbed and access to food especially at the global level. However, the local food North Pagai have non rice to replace prime food such as rice. By using the method ethnography to uncover and understand and local food commodities and accessibility of households stayed at the pandemic Covid-19.This is done to see food security that relies on local food non rice as an alternative food. The results show food security in the household level can survive by relying on local food that is non rice, taro, bananas and the natural result of the results of the sea and the forest. Local food commodities had grown up in the fields, the garden around shelter. Then, modifying the food of subbet gettek and subbet bagok and tekgi’ consumed dayli. So, even in the pandemic, food security in the household level well remain unfulfilled.

Diversity, distribution and ecology of Davallia in Sumatra (Indonesia) and the nearby small islands

Abstract. Mildawati, Sobir, Sulistijorini, Chikmawati T. 2021. Diversity, distribution and ecology of Davallia in Sumatra (Indonesia) and the nearby small islands. Biodiversitas 23: 33-42. Davallia is an epiphytic fern genus that shows high morphological variations in many characters. This genus is widely distributed in the tropics and subtropic areas. The diversity of Davallia has not been explored and recorded in many regions, including in Sumatra Island and its surrounding small islands. Therefore, this research aimed to study the diversity of Davallia species in Sumatra and the nearby small islands based on morphological variation, as well as to investigate their distribution and ecology. Samples were collected from Kerinci Seblat National Park (NP), Bukit Tiga Puluh NP, Siberut NP, Sipora Island, North Pagai Island and South Pagai, Bukit Barisan Grand Forest Park, and Bukit Barisan Selatan NP. In total, 369 specimen sheets (i.e.145 specimens from field explorations and 224 specimens from Herbarium Bogoriense collections) were examined its morphological characters. The results showed that as many as 13 species of Davallia were recorded in Sumatra and the nearby small islands. The species found are D. angustata Wall., D. corniculata T. Moore, D. denticulata (Burm. f.) Kuhn var. denticulata, D. divaricata Blume, D. heterophylla Sm., D. hymenophylloides (Bl.) Kuhn, D. parvula Wall., D. pectinata Sm., D. pentaphylla Blume, D. repens Kuhn, D. solida (G.Forst.) Sw. var. solida, D. trichomanoides Blume var. lorranii (Hance) Holttum, D. trichomanoides Blume var. trichomanoides, and D. triphylla Hook. Ten of which were new records for this location. There were 12 spesies found in Sumatra Island except D. parvula Wall. and 11 species found on the small islands around Sumatra except for D. corniculata T. Moore and D. divaricata Blume. Davallia denticulata (Burm. F.) Kuhn var. denticulata and D. solida (G.Forst.) Sw. var. solida had the largest number of specimens found. Almost all species had a random distribution pattern at altitudes of 1000-1500 m above sea level.

Distribution survey of Kloss’s Gibbons (Hylobates klosii) in Mentawai Islands, Indonesia

Abstract. Setiawan A, Simanjuntak C, Saumanuk I, Tateburuk D, Dinata Y, Liswanto D, Rafiastanto A. 2020. Distribution survey of Kloss’s Gibbons (Hylobates klosii) in Mentawai Islands, Indonesia. Biodiversitas 21: 2224-2232. The aim of this study was to assess the population density, distribution, habitats, and threats of Kloss’s gibbon (Hylobates klossii) in the Mentawai Islands, Indonesia. In 2011-2012 we conducted a survey on Siberut Island, outside of the National Park, as well as a short visit to Sipora, North Pagai, and South Pagai. From March to September 2017, we surveyed once again some previous localities on the Siberut and Sipora islands to keep up to date with recent developments on the ground. On Siberut we used an auditory sampling method through fixed point counts, combined with line transects, to estimate the gibbon densities. In total, 113-morning calls were recorded from 13 Listening Points; 75 of these were used for density calculations. We recorded 35 individuals based on direct sightings during 66.4 km of transect distance walked. We found 13 localities outside of Siberut National Park that still have Kloss's gibbons; densities varied between 1.04group/km2 to 4.16 group/km2. No gibbons were found and heard during the short survey in Sipora and South Pagai, though we found a group of gibbons in North Pagai. Our 2017 survey revealed massive habitat changes in South Siberut. Previously existing forest localities in South Siberut were gone due to road construction, agriculture expansion, and logging.

Challenges in increasing community preparedness against tsunami hazards in tsunami-prone small islands around Sumatra, Indonesia

Fifteen years since the 2004 Indian Ocean tsunami, which caused massive destruction around the Andaman Sea, people have participated in efforts to reduce tsunami risks in Indonesia. However, the most important question continues to be on whether such efforts are sufficient in dealing with tsunami risks. Among the most striking challenges here is bridging the gap in tsunami risk reduction between the Sumatra mainland and among communities in several small islands. Thus, this research aims to investigate the recent conditions of selected towns/cities in tsunami-prone small islands and identify the impediments to their tsunami hazard preparedness. It focuses on comparing efforts in terms of available facilities for tsunami evacuation plans and the tsunami estimated time of arrival (ETA), which is computed based on deterministic tsunami propagation models. In this regard, five of the observed locations are classified as being in a critical tsunami preparedness condition, namely Balai island, Lahewa of Nias Island, Sabeugunggung of North pagai Island, Surat Aban of South Pagai island, and Enggano Island. Most of them have limited space for tsunami evacuation and a short tsunami ETA, which constitutes an extreme condition requiring immediate tsunami mitigation measures. One possible approach is to construct a vertical tsunami evacuation building or modify existing buildings that can be used for tsunami evacuation on the islands. This article also highlights societal aspects related to tsunami preparedness.

Species composition of eels larvae (Anguillidae) in Mentawai Island waters, Indonesia based genetic data

The genetic variation of eels larvae Anguilla spp. which had migrated to the estuaries of North Pagai Island at Mentawai Islands was studied from September 2016 to January 2017. The objective of the present study was to validate the species composition of eels larvae that migrated to estuary of North Pagai Mentawai Islands, West Sumatra Province, Indonesia. The eels larvae were collected from Mabola, Simpungan, Saumanganya, and Taikako estuaries. A total of 10 samples from every location were used to analyse the genetic variation of eels. The result showed that the heterozygosities of Anguilla marmorata and A. bicolor pacifica are highest in Saumanganya estuary, 0.1863 and 0.1840, respectively, while A. bicolor bicolor is the highest in Taikako estuary (0.1518). Gene flow (Nm) values of eels A. marmorata, A. bicolor bicolor, and A. bicolor pacifica were 0.3656, 0.5309, and 0.4679, respectively The genetic differentiation value (Gst) of A. marmorata, A. bicolor bicolor, and A. bicolor pacifica were 0.8677, 0.4418, and 0.5686, respectively It is concluded that the genetic variation of inter-populations and intra-populations of A. marmorata was higher than A. bicolor bicolor and A. bicolor pacifica.

The Shift of Staple Food from Sago to Rice: A Study about Food Security and Indigenous Communities

Food security is still becoming a crucial issue in developing countries nowadays, either in urban or rural areas. There are many factors triggered this condition, such as the increase in population pressure and conflict, privatization and changing tenure arrangements, poverty, social differentiation and also environmental degradation. It’s undeniable that food security is a multidimensional problem, especially for people who lived in rural or isolated areas. In Mentawai Islands, a district located in the western part of Indonesia, the indigenous people depend on forest product (sago) as their main source of food. However, since 2012, the government has destroyed their food culture by establishing the ‘National Food Security Improvement Program’ and conducting the agricultural intensification as well as establishing 600 hectares of new rice fields in six sub - districts; South Pagai, North Pagai, Sikakap, South Sipora, North Sipora, and South Siberut. This study is conducted comprehensively using the Food Security and Vulnerability Analysis (FSVA) to understand and describe the exact profiles of food-insecurities and vulnerable households. Furthermore, it also identified the risks and vulnerabilities of food consumption in Mentawai communities. Findings depict that shifting or transforming the food culture from sago to rice is a serious issue because socio-cultural aspects influence it and surely the government has to make a parallel policy that can accommodate the people needs, not only prioritize the national development agenda.

Sediment Characteristic of Pagai Strait, Mentawai

Abstract. The marine sediment is important indicator of the seafloor. The characteristics of marine sediments can be seen from grain size, type and Total Dissolved Solid (TDS). Sediments derived from organic and non-organic particles are carried by the sea currents, waves, streams and tidal process in the coastal areas. At very high levels, sediments can cause pollution or vulnerability such as decreasing of dissolved oxygen, coral bleaching, and increased the eurotrification processes. Pagai Strait is located between North Pagai Island and South Pagai. This strait has enormous potential and it is used by the surrounding community for various activities such as port and sea transportation, fishery, marine aquaculture and tourism. This study aims to determine the characteristics of sediment in Pagai Strait. The field survey was conducted in September 2016 for waves, currents, water quality and sediment samples with purposive sampling method. The results showed that the average of sediments in Pagai Strait is D35 sized 0.155 mm; D50 sized 0.273 mm; and D90 sized 1.574 mm with specific gravity 2.665 gr/cm3 and dominated by sand 66.88%. TDS between 51.6 to 55.0 mg/L, appropriate for port and mangrove. Scale of sediment, A = 0.119 and sediment velocity is 0.002 m/s. Sediment transport approximately is 0.389 m3/day.

Identification of Coastal Vulnerability at The North Pagai Island of Mentawai Using Smartline Method

Climate change and global warming have a negative impact on coastal, especially small islands. Abration and floods can be very danger and need response to minimize the disaster risks. A simple and practical method is needed to inform the location and type of coastal vulnerability and its risks along coastal segments. Smartline is a coastal management method that represents the geomorphology of coastal, hinterland and shoreline. The North Pagai is a small island, a part of the Mentawai Islands that located at the west offshore of Sumatra Island and one of the under developed areas in Indonesia. The island is surrounded by the Hindia Ocean and located on a subduction path of tectonic plate that prone to earthquakes and Tsunami. High rainfall, strong winds, the complexity of coastal morphology and also the majority of coastal residents and limited infrastructure make the problems more complicated. Tsunami in 2010 (7.7 Mw) caused the change of shoreline getting worst on The East Coast of The North Pagai Island. This study aims to identify the coastal vulnerability using Smartline method. The research was conducted on April and September 2016. The result concludes that physical aspect shows Saumangaya and Matobe Village at high and also very high level of vulnerability hence Sikakap Village at very high level. The socio-economic aspect shows that The Sikakap Village is more advanced but contrary more vulnerable to disaster in terms of population density and complex activities. The North Pagai Island is a vulnerable island from physical and socio-economic aspects.

Piecemeal Rupture of the Mentawai Patch, Sumatra: The 2008 Mw 7.2 North Pagai Earthquake Sequence

AbstractThe 25 February 2008 Mw 7.2 North Pagai earthquake partially ruptured the middle section of the Mentawai patch of the Sunda megathrust, offshore Sumatra. The patch has been forecast to generate a great earthquake in the next few decades. However, in the current cycle the patch has so far broken in a sequence of partial ruptures, one of which was the 2008 event, illustrating the potential of the patch to generate a spectrum of earthquake sizes. We estimate the coseismic slip distribution of the 2008 event by jointly inverting coseismic offsets from GPS and interferometric synthetic aperture radar. We then estimate afterslip with 5.6 years of cumulative GPS displacements. Our results suggest that the estimated afterslip partially overlaps the coseismic rupture. The overlap of coseismic rupture and afterslip can be explained conceptually by a simple rate‐and‐state model where the degree of overlapping is controlled by the dynamic weakening and the critical nucleation size in the velocity‐weakening area. Comparing our rate‐and‐state model results with our geodetic inversion results, we suggest that the part of the coseismic rupture that does not overlap with the afterslip may represent a velocity‐weakening region, while the overlapping part may represent a velocity‐strengthening region.

TANTANGAN PENGEMBANGAN PADI DIKABUPATEN KEPULAUAN MENTAWAI

This study aims to identify the problems and develop rice agribusiness in Mentawai Islands from upstream to downstream and formulate appropriate policy recommendations to be implemented. The research location determined by purposive namely in the village Makalo and Malakopa District of South Pagai, Sikakap subdistrict Taikako Village, Village Saumanganya District of North Pagai, Bosua Village and Village Beriulou District of South Sipora, Village Rogdog and Madobag District of South Siberut. Respondents in this study were 30 farmers. Respondents farmers selected by simple random sampling method. The results showed that the majority of rice paddies new openings in six districts consist of peatlands with a depth varying from 0.4- > 2.0 meter, fields new openings that have been implemented in the Mentawai Islands in general can not be expected to result in maximum productivity due to problems of land suitability diverse. Farmers also do not take action appropriate technical culture starting from land preparation, seed selection, weeding, fertilizing and water management. Behaviorally agriculture, farmers in Mentawai Islands is not a society that blends with the culture of rice fields, it is because basically their agricultural base is dry land agriculture with farming patterns. This will certainly give a great challenge and not easy for the cultivation of rice in the Mentawai Islands.Keywords:challenge,rice agribusiness, cultivation of rice

Recruitment Status of Coral Reefs (Scleractinian) after Earthquake and Tsunami in North Pagai Island of Mentawai Islands Regency

Recruitment of coral is marked by the appearance of reef colonies that are still juvenile. Coral recruitment data after the earthquake and tsunami are very few either in Indonesia or in other part of the world. The purpose of this study is to analyze the level of recruitment and to analyze recruitment diversity of coral reef Scleractinian in the waters affected by tsunami (west coast) and not affected by tsunami (east coast) of North Pagai Island. The observation on coral recruitment used benthic quadrate sampling method with a size of 1x1m 2 and the diameter of colony taken measured between 0.5–10 cm. The result of the study shows that the average of recruitment density at the west coast ( affected by tsunami) ranged between 0.78–3.67 colonies.m -2 and at the east coast (not affected by tsunami) ranged between 5.11–11.67 colonies.m -2 . Coral recruitment level of the east coast is within the category of medium to very high while coral recruitment level of the west coast is in very low to low category. Diversity index (H') of east coast and west coast ranged between 1.55–2.54 with medium category, evenness index (E) of east coast and west coast ranged between 0.87–0.97 with stable category, and dominance index (C) with values ranging from 0.10 – 0.13 with low category. . Types of coral Porites cylindrica is growing rapidly and has the highest level of recruitment after the tsunami. Keywords : recruitment reef, tsunami, coral, North Pagai Island

The Mapping of Temporary Evacuation Site (TES) and Tsunami Evacuation Route in North Pagai Island, Mentawai Islands Regency - Indonesia

Mentawai Islands Regency, especially north Pagai island, suffered two earthquakes on April 15 2016. The local government in cooperation with the relevant parties had tried to minimize casualties before the disaster or during the disaster by making an evacuation route to the TES. The purpose of this study was to the mapping of TES and tsunami evacuation route using the approach of Geographic Information Systems (GIS) for disaster mitigation of tsunami-potential earthquake in north Pagai island.The research was conducted at 3 locations in the coast of Sikakap village, 4 locations in the coast of Taikako village, 3 locations in the coast of Silabu village, 7 locations in the coast of Saumanganya village, and 3 locations in the coast of Matobe village. The effort taken was to evacuate people to the TES with an average distance of 372.62 m from the beach. The results showed that the feasibility of TES that could accommodate residents, among others, were in the hills behind Sikakap Port, Taikako Silaoinan hills, the hills near the Mapinang Silabu village chief's office and Mapinang hills, Gulukguluk Saumanganya and Panatarat Matobe hills.

Orang Mentawai: Peladang Tradisional dan Ekonomi Pasar

This article describes the pattern of cultivation, production and distribution of farm fields of the Mentawai society which are based on the results of a research conducted using the perspective of economic anthropology. The study was conducted in eight hamlets. Four separate hamlets in the north and south of Siberut Island, four other separate hamlets in Sipora Island and North Pagai Island. The farming habit of planting various types of plants in the field (mone) to meet the needs of food and cash crops to be sold (commodities for exports) is not focused and can only adapt to the market price and the small quantity of harvest, individually cost them, in contrast to traders who have strategies to anticipate losses due to the fluctuation of price.Key words: traditional cultivation, market