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Septiana, A. R., H. Samodra, and Y. N. Lamatenggo. "Geopark as a Participatory Collaborative Management Concept to Manage the Raja Ampat Archipelago." IOP Conference Series: Earth and Environmental Science 1163, no. 1 (2023): 012021. http://dx.doi.org/10.1088/1755-1315/1163/1/012021.
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Abstract Numerous and multi-level organizations from sub-national to international working in Raja Ampat Regency as the globally important marine areas and world’s class tourism, yet the gap of knowledge and capacities with communities keeps distancing. Raja Ampat Geopark exists as a management agency that coordinates various programs implemented by multi-institutions with various interests within the Regency. Approaching the effective management, Raja Ampat Geopark performs through three stages: 1) mapping relevant stakeholders; 2) designing a participatory collaboration strategy; and 3) encouraging the collaborative works following the strategy where the roles of each stakeholder are clear. Master plan of Raja Ampat Geopark were developed and agreed by 41 related partners of were clustered into 8 interest groups, who are implementing 31 programs consists of 84 activities. This collaborative participatory marine management resulting an increase of documentation and published biodiversity data, of which empowered by the improved capacities of local government and communities in Raja Ampat.
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Forderer, Meena, and Martin R. Langer. "Atlas of benthic foraminifera from coral reefs of the Raja Ampat Archipelago (Irian Jaya, Indonesia)." Micropaleontology 64, no. 1-2 (2018): 1–170. http://dx.doi.org/10.47894/mpal.64.1.01.
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Raja Ampat (Indonesia) is a remote archipelago west of Papua mainland and situated at the eastern edge of the Coral Triangle. The archipelago is considered one of the species-richest and most pristine localities and home to the world’s most diverse coral reefs. For centuries, reefs of Raja Ampat have enjoyed natural protection and remained largely untouched due to their isolated location. The region represents a key area for evaluating richness and biogeographic patterns of tropical shallow-water organisms, yet the foraminiferal fauna of Raja Ampat is virtually unexplored. Benthic foraminifera are an integral part of the reef fauna, prolific carbonate producers and essential for reefal accretion and substrate stability. Previous studies on Indo-Pacific benthic reef foraminifera indicate that diversity is highest in the Central Indo-Pacific and broadly correlates with diversity patterns of other tropical marine taxa. This report presents the first illustrated catalog and comprehensive analysis of the structure, composition, and diversity of the species-rich benthic foraminiferal biotas of the Raja Ampat Archipelago including an assessment of local reef vitality with the Foraminifera in Reef Assessment and Monitoring (FoRAM) Index. We examined shallow-water sediment samples from fringing reefs, reef platforms, sheltered bays and reef-associated environments to cover the full range of existing micro- and macrohabitats. Atotal number of 421 species were recovered, among them five new species and one newly described genus of the porcelaneous Miliolida. The fauna is dominated by hyaline taxa but the Miliolida represent the species-richest order and are especially diverse in fine-grained sediments of deep fore-reef slopes. Extraordinary high diversity of the benthic foraminiferal communities indicates that the waters of Raja Ampat probably represent one of the world’s biologically richest locations in reefs.We identified a total of 35 species of larger symbiont-bearing benthic foraminifera, a number that is among the highest reported so far for reefs in modern oceans. The analysis of the FoRAM Index revealed that water quality at all sites examined is suitable for reef growth and recovery. The results of our study show that the Raja Ampat Archipelago harbors unique and particularly diverse assemblages of modern benthic foraminifera and provides a protistan perspective for the hotspot of diversity in the Central Indo-Pacific.
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ANZANI, LUTHFI, HAWIS H. MADDUPPA, I. WAYAN NURJAYA, and P. JOANA DIAS. "Short Communication: Molecular identification of White Sea Squirt Didemnum sp. (Tunicata, Ascidiacea) colonies growing over corals in Raja Ampat Islands, Indonesia." Biodiversitas Journal of Biological Diversity 20, no. 3 (2019): 636–42. http://dx.doi.org/10.13057/biodiv/d200304.
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Abstract. Anzani L, Madduppa HH, Nurjaya IW, Dias PJ. 2019. Short Communication: Molecular identification of White Sea Squirt Didemnum sp. (Tunicata, Ascidiacea) colonies growing over corals in Raja Ampat Islands, Indonesia. Biodiversitas 20: 636-642. Indonesia is at the center of the Coral Triangle, the region with the world’s highest marine biodiversity. The Raja Ampat archipelago in east Indonesia has one of the oldest networks of marine protected areas in the country and is a top priority area for marine conservation. The area is however under anthropogenic pressure from growing tourism, developments and exploration of natural resources. The most likely associated introduction of non-native species is however largely unexplored. Colonial ascidians or ‘sea squirts’ comprise a high number of species, many of them reported as introduced or invasive worldwide. In this study, we investigate the presence of white colonial ascidian colonies noticed to overgrow sections of the coral reefs in central Raja Ampat. We use DNA barcoding to address the colonies’ species identification and explore haplotype diversity to determine the species native or introduced status. We produced 22 DNA barcodes belonging to four potential cryptic Didemnum sp. species present in the Raja Ampat archipelago, Indonesia. Overall, the high number of haplotypes found in the area suggest these to most likely to be native species. The present work represents, as far as the authors are aware, the first time that such species were investigated in Raja Ampat. We hope with this work to create awareness for the topic of introduced and invasive species in the area and motivate further studies in Indonesia.
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Runtuboi, Ferawati, Dietriech Geoffrey Bengen, I. Wayan Nurjaya, Nyoman Metta N. Natih, Andi Zulfikar, and Calvin S. Beale. "Relationship Between Environmental Parameters and Manta Ray Occurrence in Raja Ampat Archipelago, Indonesia." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 29, no. 1 (2024): 37–47. http://dx.doi.org/10.14710/ik.ijms.29.1.37-47.
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Understanding the influence and impact of environmental factors on manta ray sightings is critical to understanding the spatial and temporal ecology of a highly mobile species. Therefore, this study aims to determine the influence and impact of environmental factors as indicated by the parameters of wind speed, chlorophyll-a, SST, salinity, pH, dissolved oxygen, and the number of phytoplankton and zooplankton species. The mapped chlorophyll-a was re-analyzed based on the seasonal period throughout 2021 downloaded from marine copernicus and analyzed by kriging method. The influence and effects of environmental parameters on the short-term appearance of eye rays were studied using an adaptive model (GAM). The analysis showed a significant influence of environmental factors on manta ray sightings in Raja Ampat, namely Calanoid spp, Oithona nana, Acartia clausi, Calanus helgoladicus, and Oithona brevicornis. Based on this model, zooplankton is an important parameter that can describe the influence of environmental parameters on manta ray sightings at observation points in Raja Ampat MPA. The results of the reanalysis of chlorophyll-a concentrations were highest in the eastern to transitional seasons, which were scattered on the west side of Raja Ampat waters. Meanwhile, chlorophyll-a concentrations were low in the west to transitional season on the east side. This mechanism may drive the foraging strategy of manta rays, which visit shallow waters where zooplankton density and biomass are abundant. Adopting the BHS MPA network concept, as it has been implemented, would be in line with broader conservation expectations for the sustainability of manta rays in Raja Ampat.
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Latuny, Richard, Eddy Supriyono, Sri Listyarini, Nur Hasanah, and Subandiyono Subandiyono. "Strategi Pengembangan Budidaya Laut Di Kabupaten Raja Ampat Mariculture Development Strategy in Raja Ampat Regen." Sains Akuakultur Tropis 6, no. 2 (2022): 146–54. http://dx.doi.org/10.14710/sat.v6i2.13946.
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The purpose of this study was to analyze the internal and external environment as well as the right strategy for Raja Ampat Regency in the process of developing fisheries in Capture Fish cultivation. The research method used is the questionnaire method and in-depth interviews using FGD to obtain the SWOT variable (Strengths, Weaknesses, Opportunisities , Threats). The results showed that the strength of the Raja Ampat archipelago consisted of strategic geographical position, high potential of aquaculture, available cultivation land, and available labor. While the weaknesses consist of limited seed log size, fish mortality caused by disease, low water quality management, limited trash feed, limited capital, low skills, knowledge of cultivation technology, and limited access to markets. Opportunities for grouper farmers in Raja Ampat district consist of high fish prices, wide open market demand, increased income of coastal communities, absorption of labor, regional autonomy, RTRW / RTWRPL / Kab. Zoning Plans. Raja Ampat, National Policy in fisheries development. While threats consist of climate change / season, lack of market guarantee, determination of quality standards for aquaculture products, low capital support, safety, environmental pollution, and lack of enforcement of RTRW regulations for fisheries cultivation development. In this case, the right strategy in this case is maximizing strength in taking advantage of opportunities, taking advantage of opportunities to suppress weaknesses, maximizing strength to avoid threats, and suppressing weaknesses and avoiding threats.
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Nawir, M. Syukri, Muhamad Yusuf, and Akhmad Kadir. "Islam Raja Ampat dan Mitos Hantu Cuwig." SANGKéP: Jurnal Kajian Sosial Keagamaan 3, no. 1 (2020): 1–22. http://dx.doi.org/10.20414/sangkep.v3i1.1482.
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The clash of religions, customs, local beliefs gives a distinctive color in the lives of the people of the Raja Ampat Islands. How the myth of Cuwig's mythical influence on religious life in the village of Lilinta in the Raja Ampat-Papua archipelago and in interpreting and reformulate their religious life in response to the myth of Cuwig. Religious knowledge has an important meaning to improve the faith of the community, thus creating religious emotion, encouraging people to do religious actions, although there is still a society believing the mystical, lack of of religious development. The mythical ghost of Cuwig is influenced by the environment. Myths evolved from the simultaneous stories beginning with the emergence of sudden death from the citizens, the problem spread the issue of the science of Cuwig in the intended person.
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Schrader, Julian, Soetjipto Moeljono, Junus Tambing, Cornelia Sattler, and Holger Kreft. "A new dataset on plant occurrences on small islands, including species abundances and functional traits across different spatial scales." Biodiversity Data Journal 8 (September 10, 2020): e55275. https://doi.org/10.3897/BDJ.8.e55275.
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We introduce a new dataset of woody plants on 60 small tropical islands located in the Raja Ampat archipelago in Indonesia. The dataset includes incidence, abundance and functional trait data for 57 species. All islands were sampled using a standardised transect and plot design providing detailed information on plant occurrences at different spatial scales ranging from the local (plot and transect scale) to the island scale. In addition, the dataset includes information on key plant functional traits linked to species dispersal, resource acquisition and competitive strategies. The dataset can be used to address ecological questions connected to the species-area relationship and community assembly processes on small islands and in isolated habitats.The dataset yields detailed information on plant community structure and links incidence, abundance and functional trait data at different spatial scales. Furthermore, this is the first plant-island dataset for the Raja Ampat archipelago, a remote and poorly studied region, and provides important new information on species occurrences.
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Angraeni, Ananda Nurafifah. "Implementasi Penegakan Hukum Pidana terhadap Praktik Illegal Fishing di Kabupaten Raja Ampat berdasarkan UU No. 45 Tahun 2009 tentang Perubahan UU No. 31 Tahun 2004 tentang Perikanan." Jurnal Riset Ilmu Hukum 1, no. 1 (2021): 52–61. http://dx.doi.org/10.29313/jrih.v1i1.201.
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Abstract. Raja Ampat is an archipelago which is estimated to be around 80% of the waters with fishery potential and its marine wealth makes Raja Ampat vulnerable to illegal fishing. Raja Ampat is an area with a high wealth of marine biological resources, it is estimated that there are 537 hard coral species, of which 9 are new species and 13 endemic species. This amount represents 75% of the world's corals (CI, TNCWWF). Throughout the Raja Ampat region, 1,104 species of fish were recorded, consisting of 91 families. And it is estimated that there are 1,346 species of fish throughout the Raja Ampat area, making this area the area with the highest species richness of reef fish in the world. In addition, in this area also found 699 types of soft animals (types of molluscs) consisting of 530 snails (gastropods), 159 shellfish (bivalves), 2 scaphoda, 5 squid (cephalopods), and 3 chitons. The purpose of this study is to find out what are the factors that cause illegal fishing practices that occur in the Raja Ampat waters and what efforts are made by the Raja Ampat Police Water Police Unit in tackling illegal fishing practices in Raja Ampat Regency. The method used is an empirical research method, which is a legal research method that functions to be able to see the law in a real sense and examine how the law works in a community environment. The data collection method used was by conducting interviews with one of the authorized legal officers, namely the Head of the Raja Ampat Water Police. Based on the results of interviews, it can be seen that the factors that cause illegal fishing in Raja Ampat are as follows: There is a deliberate factor of fishing fishermen to violate the provisions that have been set for various reasons. Then using chemicals both with potassium and explosive devices such as fish bombs is a factor to make it easier for fishermen to catch fish. The existence of a large conservation area so that the place for fishermen to catch fish becomes narrow which then causes unscrupulous fishermen to make arrests in prohibited zones, the assumption that law enforcement officers in the waters are few in number, the facilities and markets of the Raja Ampat Polar Unit are inadequate with a large area , lack of personnel is one of the causes of non-optimal supervision, the existence of unique marine biota factors that cannot be found elsewhere, and lack of coordination between law enforcement officers, namely the Navy, Marine and Fisheries Service, and the Water Police. To overcome this, the Raja Ampat Police Water Police Unit made preventive efforts such as providing education to coastal communities about what legal consequences would be received by violators. Not only that, the Raja Ampat Water Police Unit has also taken strict action against people who are proven to be doing illegal fishing. Based on the research conducted, the Raja Ampat Police Water Police Unit showed an increase in work, this can be seen that in 2020 there will be no illegal fishing in the Raja Ampat jurisdiction, but this is inseparable from shortcomings. For example, the Water Police Unit of the Raja Ampat Police can only patrol from waisai-piyanemo and find it difficult to patrol inland islands.
 Abstrak. Raja Ampat merupakan kepulauan yang diperkirakan sekitar 80% perairan dengan potensi perikanan dan kekayaan laut yang dimilikinya menjadikan Raja Ampat rentan terhadap tindak pidana illegal fishing. Raja Ampat merupakan wilayah dengan kekayaan sumber daya hayati laut yang tinggi, diperkirakan terdapat 537 jenis karang keras, dimana 9 diantaranya merupakan jenis baru dan 13 jenis endemik. Jumlah ini merupakan 75% karang dunia (CI, TNCWWF). Diseluruh wilayah Raja Ampat tercatat 1.104 jenis ikan, dimana terdiri dari 91 famili. Dan diperkirakan terdapat 1.346 jenis ikan di seluruh kawasan Raja Ampat, sehingga menjadikan kawasan ini sebagai kawasan dengan kekayaan jenis ikan karang tertinggi di dunia. Selain itu, di kawasan ini juga ditemukan 699 jenis hewan lunak (jenis molusca) yang terdiri atas 530 siputsiputan (gastropoda), 159 kekerangan (bivalva), 2 scaphoda, 5 cumi-cumian (cephalopoda), dan 3 chiton. Tujuan penelitian ini adalah untuk mengetahui apa faktor-faktor penyebab terjadinya praktik illegal fishing yang terjadi diwilayah perairan Raja Ampat dan upaya-upaya apa yang dilakukan Satuan Polisi Perairan Polres Raja Ampat dalam menanggulangi praktik illegal fishing di Kabupaten Raja Ampat. Metode yang digunakan adalah metode penelitian empiris yaitu suatu metode penelitian hukum yang berfungsi untuk dapat melihat hukum dalam artian nyata serta meneliti bagaimana bekerjanya hukum di suatu lingkungan masyarakat. Metode pengumpulan data yang dilakukan adalah dengan melakukan wawancara kepada salah satu aparat hukum yang berwenang yaitu Kasat Polisi Perairan Raja Ampat. Berdasarkan hasil wawancara dapat dapat diketahui bahwa faktor-faktor yang menyebabkan terjadinya illegal fishing di Raja Ampat adalah sebagai berikut: Adanya faktor kesengajaan dari para nelayan penangkap ikan untuk melanggar ketentuan-ketentuan yang sudah ditetapkan dengan berbagai alasan. Kemudian menggunakan bahan kimia baik dengan potasium maupun alat peledak seperti bom ikan menjadi faktor untuk memudahkan nelayan dalam menangkapan ikan. Adanya area konservasi yang luas sehingga tempat untuk nelayan menangkap ikan menjadi sempit kemudian menyebabkan oknum nelayan melakukan penangkapan pada zona-zona yang dilarang, anggapan bahwa aparat penegak hukum diperairan sedikit jumlahnya, sarana dan pasarana Satuan Polair Raja Ampat yang tidak memadai dengan luas wilayah yang besar, kekurangan personil menjadi salah satu penyebab tidak optimalnya pengawasan, Adanya faktor biota laut khas yang tidak dapat ditemukan ditempat lain, dan Kurangnnya koordinasi diantara aparat hukum yaitu TNI AL, Dinas Kelautan dan Perikanan, dan Polisi Perairan. Untuk menanggulangi hal tersebut Satuan Polisi Perairan Polres Raja Ampat melakukan upaya-upaya pencegahan seperti memberikan edukasi kepada masyarakat pesisir pantai tentang konsekuensi hukum apa yang akan diterima oleh pelanggar. Tidak hanya itu, Satuan Polisi Perairan Raja Ampat juga melakukan penindakan tegas kepada masyarakat yang terbukti melakukan illegal fishing. Berdasarkan penelitian yang dilakukan, Satuan Polisi Perairan Polres Raja Ampat menunjukan peningkatan kerja hal ini dapat dilihat bahwa pada tahun 2020 tidak terjadi illegal fishing diwilayah hukum Raja Ampat namun hal ini tidak terlepas oleh kekurangan-kekurangan. Contohnya seperti Satuan Polisi Peairan Polres Raja Ampat hanya dapat melakukan patroli dari waisai-piyanemo saja dan kesulitan untuk melakukan patroli di pulau-pulau pedalaman.
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OLIVER, PAUL, BURHAN TJATURADI, MUMPUNI _, KELIOPAS KREY, and STEPHEN RICHARDS. "A new species of large Cyrtodactylus (Squamata: Gekkonidae) from Melanesia." Zootaxa 1894, no. 1 (2008): 59–68. http://dx.doi.org/10.11646/zootaxa.1894.1.5.
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A new species of large Cyrtodactylus is described from lowland rainforest on Batanta Island in the Raja Ampat Archipelago, Papua Barat Province, Indonesian New Guinea. The new species can be distinguished from all other Melanesian Cyrtodactylus by the combination of large size (over 110mm SVL), very robust build, presence of enlarged ventral tubercles below the lateral fold and around the angle of the lower jaw only, and dorsal colouration consisting of three to four irregular dark greyish-brown blotches. It is the second species of Cyrtodactylus known with certainty only from the Raja Ampat Islands. The morphology of the new species places it within the C. loriae group and suggests that it is closely related to Cyrtodactylus irianjayaensis.
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Schrader, Julian, Christoph Parsch, Soetjipto Moeljono, et al. "An annotated bird checklist for Gam island, Raja Ampat, including field notes on species monitoring and conservation." Forest and Society 4, no. 2 (2020): 310. http://dx.doi.org/10.24259/fs.v4i2.8664.
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Species checklists are a fundamental component of biodiversity research. They foster understanding of species distributions and habitat preferences, thus reducing gaps of knowledge in geographical occurrences of species. Especially in light of the limited availability of data on species distributions for Tanah Papua, an increasing scientific focus on the region is crucial to foster and refine the knowledge of species occurrences and to inform potential conservation planning. Despite a strong focus on conservation of Raja Ampat´s marine areas, surprisingly few studies have focused on the terrestrial biodiversity of the archipelago. As a consequence, detailed species checklists are largely missing. Here, we provide a preliminary bird species checklist for the island of Gam and its surrounding islands, located in the central Raja Ampat archipelago. During nine sampling periods between 2013 and 2019, we recorded 132 bird species in six distinct habitat types. Of the detected species, six are considered threatened by IUCN Red List criteria. We further recorded three new species for Gam Island, thereby expanding their known extent of occurrence.
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Legalov, Andrei A. "New species of the genus Orthorhynchoides Legalov, 2007 (Coleoptera: Belidae) from the Papuan Region." Ecologica Montenegrina 78 (August 30, 2024): 34–46. http://dx.doi.org/10.37828/em.2024.78.5.
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Four new species of the subgenus Guineorhinotia Legalov, 2007 of the genus Orthorhynchoides Legalov, 2007 of Belinae (Belidae) are described from Papua New Guinea and Indonesian Raja Ampat Archipelago. Orthorhynchoides (Guineorhinotia) rosseliensis sp. n. from Rossel Island (Louisiade Archipelago) differs from O. (G.) telnovi Legalov, 2023 in the coarsely punctate pronotum, the elytra with coarse punctation and six spots of pale setae. Orthorhynchoides (G.) titovi sp. n. from Morobe Province differs from O. (G.) wallacei (Pascoe, 1874) in the elytra with greenish lustre and large punctation and the 6-7 spots of pale setae, the mesmetepimeron pale setose. Orthorhynchoides (G.) limbourgi sp. n. from Madang Province differs from O. (G.) misoolensis sp. n. in elytra with violet lustre, without the spots of pale setae and the wider protibiae; from O. (G.) corallimerus (Heller, 1914) in the mesmetepimeron covered with pale setae and the elytron not pale spotted. Orthorhynchoides (G.) misoolensis sp. n. from Misool Is. (Raja Ampat Archipelago) differs from O. (G.) limbourgi sp. n. in the elytron with bluish lustre and with 4-6 spots of pale setae, and the narrower protibiae. A key to the species of the subgenus Guineorhinotia is presented. A checklist of species of the subgenus Guineorhinotia from the Papuan Region and a distribution map for New Guinea are given.
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Arnold, Laura. "A preliminary archaeology of tone in Raja Ampat." NUSA: Linguistic studies of languages in and around Indonesia 64 (March 1, 2018): 7–37. https://doi.org/10.5281/zenodo.1450776.
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At least three Austronesian languages spoken in the Raja Ampat archipelago have lexical tone: Maˈya, Matbat, and Ambel. The objective of this paper is to examine data from these three languages, in order to determine how tone originated and developed. Using comparative data from monosyllabic cognates, I will show that, in the case of Maˈya and Matbat, tone was inherited from a single common ancestor; but that tone developed separately in Ambel. Possible scenarios for tonogenesis in proto-Maˈya-Matbat and protoAmbel will then be explored. I will conclude that, in the absence of evidence for spontaneous, independent tonogenesis, the most likely scenario was that proto-MaˈyaMatbat developed tone through contact with a now-extinct tonal Papuan substrate. ProtoAmbel also likely developed tone through contact; however, it is at present unclear whether this contact was also with a Papuan substrate, or with tonal proto-Maˈya-Matbat or one of its descendants.
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Arnold, Laura. "A preliminary archaeology of tone in Raja Ampat." NUSA: Linguistic studies of languages in and around Indonesia 64 (March 1, 2018): 7–37. https://doi.org/10.5281/zenodo.1450778.
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At least three Austronesian languages spoken in the Raja Ampat archipelago have lexical tone: Maˈya, Matbat, and Ambel. The objective of this paper is to examine data from these three languages, in order to determine how tone originated and developed. Using comparative data from monosyllabic cognates, I will show that, in the case of Maˈya and Matbat, tone was inherited from a single common ancestor; but that tone developed separately in Ambel. Possible scenarios for tonogenesis in proto-Maˈya-Matbat and protoAmbel will then be explored. I will conclude that, in the absence of evidence for spontaneous, independent tonogenesis, the most likely scenario was that proto-MaˈyaMatbat developed tone through contact with a now-extinct tonal Papuan substrate. ProtoAmbel also likely developed tone through contact; however, it is at present unclear whether this contact was also with a Papuan substrate, or with tonal proto-Maˈya-Matbat or one of its descendants.
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Oláh, J. "On the Trichoptera of Batanta Island (Indonesia, Papua, Raja Ampat Archipelago), III." Folia Entomologica Hungarica 75 (2014): 91–131. http://dx.doi.org/10.17112/foliaenthung.2014.75.91.
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LARSEN, S. NEIL, CRAIG LEISHER, SANGEETA MANGUBHAI, ANDREAS MULJADI, and RICARDO F. TAPILATU. "Fisher perceptions of threats and fisheries decline in the heart of the Coral Triangle." Indo Pacific Journal of Ocean Life 2, no. 2 (2018): 41–46. http://dx.doi.org/10.13057/oceanlife/o020201.
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Larsen SN, Leisher C, Mangubhai S, Muljadi A, Tapilatu RF. 2018. Fisher perceptions of threats and fisheries decline in the heart of the Coral Triangle. Ocean Life 2: 41-46. The Coral Triangle contains the most species-diverse coral reefs in the world, and at its center is the Raja Ampat archipelago in West Papua, Indonesia. The marine resources of Raja Ampat are an important source of food and livelihood for thousands of people, but overfishing and destructive fishing practices threaten its coral reefs and fisheries. To better understand the threats, we surveyed the ‘most knowledgeable fishers’ in all 88 of Raja Ampat’s coastal villages (n = 495) in 2003-2005. We analyzed the links between declines in fish catch and threats to marine resources as perceived by fishers. Blast fishing, cyanide fishing, and ‘outsiders’ were perceived to be the causes of the fish declines and the greatest ongoing threats to fisheries resources. We also found evidence of inter-generational differences in perceptions on the health of local fisheries. For fishers who had over 15 years of fishing experience, 77% reported a decrease in fish catch. For fishers who had less than 5 years of experience, only 41% reported a decrease in catch. Education and outreach on illegal fishing practices and the benefits of healthy coral reef ecosystems are likely to be ongoing needs in communities in Raja Ampat.Coral reefs
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Fa Bate, Yunus, and Stefany Margareta Martono. "The Solar Power Plant In The Area Of Waisai Raja ampat Region West Papua Province." Electro Luceat 5, no. 2 (2019): 71–80. http://dx.doi.org/10.32531/jelekn.v5i2.157.
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The electrical energy needs become one of the basic needs of both people who live in cities and people who live in villages. The government continues to strive to provide these electricity needs so that the electrification ratio and electricity villages in Indonesia can be gradually increased. Based on data from the Directorate General of Electricity and Energy Utilization of the Ministry of Energy and Mineral Resources in 2017, parts of western Indonesia ranging from the Aceh Special Region to Sulawasi, the electrification ratio reaches an average of above 70%. For the province of West Papua, has an electrification ratio of 82.7% but there is an imbalance in terms of equity where the ratio of electrified villages is only 54.47%. West Papua are rural and archipelago with geographical conditions making mobilization of tools very difficult. To increase the ratio of electricity villages, one solution that can be done is to optimize the use of natural resources for construction of electricity generation. The potential of natural resources in West Papua especially in the Waisai region of Raja Ampat Regency is abundant solar energy both in the intensity of solar radiation and the length of time of irradiation due to geographical location located on equator.
 The research was carried out experimentally by making solar power plants using photovoltaic 50 Wp to obtain empirical data that provides information on the potential parameters of solar power plants. The results obtained indicate that in Waisai Raja Ampat the maximum radiation intensity can reach 1101.2 W / m2, the maximum input power and maximum power output of photovoltaic cells are 339.9404 Watt and 30.46640 Watt and maximum efficiency reaching 9.26%. Based on these empirical data, the prospect of utilizing photovoltaic type solar power plants in Waisai Raja Ampat Regency is very good and appropriate.
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Aisyah, Siti Zanuba, Neviaty Putri Zamani, Ni Kadek Dita Cahyani, et al. "Challenges in Molecular and Morphological Identification of Sponge Species in Raja Ampat." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 30, no. 1 (2025): 115–25. https://doi.org/10.14710/ik.ijms.30.1.115-125.
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Sponges (Phylum Porifera) are a group of highly diverse, sessile, and filter-feeding basal metazoans, except spongillids. The majority of sponges are marine species that play an important role in benthic habitat by maintaining the stability of marine ecosystems through nutrient cycling, habitat provision, and bioerosion. However, marine sponges are not easily identifiable because of their lack of species-level distinctive morphological features, which limits efforts to monitor actual species biodiversity. Indonesia is home to approximately 850 identified species of marine sponges, and Raja Ampat archipelago of West Papua province is known for its exceptional marine biodiversity. Despite the species abundance, the exact number of sponges in the region is not well-documented due to the lack of specific studies providing comprehensive data on their diversity. Therefore, this study aimed to conduct a DNA barcoding analysis using the mitochondrial cytochrome oxidase I (COI) gene as a marker, combined with morphological analyses of 22 individuals collected in the waters of Waigeo, Mansuar, and Gam Islands in Raja Ampat. The results showed that 3 samples were identified at the species level (Halichondria sp. and Stylissa carteri) with good query cover and percent identity. This showed the possible presence of undescribed or cryptic species, suggesting a severe lack of reference data for both morphology and molecular analyses of marine sponges in the region. Consequently, the analysis showed the presence of a significant gap in the understanding of sponge biodiversity in Raja Ampat's waters.
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Oláh, János, Tibor Kovács, and Róbert Horváth. "On the Trichoptera of Batanta Island, West Papua, Indonesia, VII. : New leptocerids." Opuscula Zoologica 53, no. 2 (2022): 227–38. http://dx.doi.org/10.18348/opzool.2022.2.227.
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Based on newly collected materials here we report new faunistic data for this diverse island and describe five new leptocerid species from the Batanta Island (Indonesia, West Papua, Raja Ampat Archipelago): Oecetis anyam Oláh, sp. nov., O. apam Oláh, sp. nov., O. batanta Oláh, sp. nov., Leptocerus batanta Oláh, sp. nov. Setodes sarlos Oláh, sp. nov. As well as to clear the taxonomic status of Oecetis anyam Oláh, sp. nov. it was necessary to survey the unsettled species group of Oecetis hemerobioides with description of new species from Indonesia, Sumba Island: Oecetis sumbaensis Oláh, sp. nov. and from the Cyclops Mountain of West Papua: Oecetis cyclopensis Oláh, sp. nov.
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Purwanti, Nanik, Uswatul Mardliyah, and Yonas Yapen. "The Tradition of Paying Dowry: A Case of Biak Wardo Tribe in Ayau Islands, Raja Ampat." ELS Journal on Interdisciplinary Studies in Humanities 5, no. 3 (2022): 468–72. http://dx.doi.org/10.34050/elsjish.v5i3.23006.
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Indonesia has a diversity of religions and cultures therefore when we talk about marriage that is framed in a relationship with God and tradition or customary positive law, it is certain that each region has differences in the implementation which is unique. Culture is something that can be used as a unique and distinctive identity for an area. Indonesia has many kinds of culture and traditions. These traditions are usually used as a rule or pattern of life of the community in everyday life. One of them is marriage, one of the important elements in marriage is the payment of a dowry. Marriage processions have procedures that vary according to tradition in society, and each culture has a way of interpreting the dowry itself. This is the case with the marriage customs of the Biak Wardo Tribe in the Ayau Islands District. This study aims to determine the dowry payment tradition of the Biak Wardo Tribe in the Ayau Archipelago District, Raja Ampat Regency, and to find out the obstacles faced in the Biak Wardo Tribal dowry payment tradition in the district. Ayau Islands, Raja Ampat Regency. The method used in this study used qualitative methods and analyzed descriptively qualitatively. This study also uses the discipline approach of Anthropology and Sociology. Data Collection Techniques with Observation, Interviews, and Documentation, Data Analysis Techniques. The results of this study indicate that the tradition of paying the dowry of the Biak Wardo tribe, Ayau islands, Raja Ampat district is divided into three parts, namely Sanepen, Ararem and Anum. The obstacle that often occurs is the addition of dowry payments from the woman's family so that the man must pay it on the same day while the extra requested is not given in the agreed note, it is often troublesome for the man's family but the man must still pay it on that day also so that the payment of the dowry is considered legal.
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Ruzuqi, Rezza, Sony Rumalutur, Disabella Dayera, Muh Arzad, and Munzir Munzir. "Fiberglass Ship Repair Training on Abidon Island, Ayau Islands, Raja Ampat." Mattawang: Jurnal Pengabdian Masyarakat 3, no. 4 (2022): 504–13. http://dx.doi.org/10.35877/454ri.mattawang1241.
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Indonesia is rich in small islands that have not to explore, one of which is Abidon Island, located in the Ayau archipelago. Most of the Abidon people use small boats for fishing activities. There are two small shipbuilding materials, FRP (Fibre-reinforced plastic) or Fiberglass and wood-reinforced Polymer Composite Materials. Abidon Island has a lot of coral reefs, so many ships suffered ship damage in the hollow bottom hull. However, in the repair process, they experienced difficulties due to lack of knowledge of ship repair. Therefore, This activity provides training on fiberglass ship repair methods, namely the Casting and Hand Lay Up method. In Hand Lay Up method, the reinforcing materials used are Woven Roven 600 and Chopped Strand Mat 450, and for the Casting method, the resin-catalyst composition used is 99%-1%, respectively. The number and variation of layers obtained from the reference. The results obtained show a neat and solid.
 Abstrak
 Indonesia kaya akan pulau kecil, banyak sekali pulau kecil yang belum dieksplorasi salah satunya Pulau Abidon yang terletak di kepulauan Ayau. Masyarakat Abidon, sebagian besar memanfaatkan kapal kecil untuk melakukan aktifitas menangkap ikan. Terdapat dua bahan pembuat kapal kecil di wilayah tersebut, yakni FRP (Fibre-reinforced plastic) atau Material Komposit Polimer berpenguat Fiberglass dan kayu. Pulau Abidon dikelilingi terumbu karang, sehingga banyak kapal mengalami kerusakan kapal pada hull bawah berlubang. Akan tetapi dalam proses perbaikan, mengalami kesulitan karena minim pengetahuan perbaikan kapal. Oleh sebab itu, kegiatan ini memberikan pelatihan metode perbaikan kapal fiberglass yakni metode Casting dan Hand Lay Up. Dalam metode Hand Lay Up, bahan penguat yang digunakan yakni Woven Roven 600 dan Chopped Strand Mat 450 dan untuk metode Casting, komposisi resin-katalis yang digunakan masing-masing 99%-1%. Jumlah dan variasi lapisan didapat dari referensi. Hasil yang didapat memperlihatkan tambalan rapi dan kuat.
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Arnold, Laura. "The Diachrony of Word Prosody in the Maˈya-Salawati Languages of Raja Ampat". Oceanic Linguistics 64, № 1 (2025): 86–144. https://doi.org/10.1353/ol.2025.a960926.
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Abstract: In this paper, I reconstruct the word-prosodic system of Proto-Maˈya-Salawati, the parent of several Austronesian languages of the Raja Ampat archipelago in northwest New Guinea. The aim of this reconstruction is twofold. First, word-prosodic changes in the daughter languages provide evidence for the subclassification of this branch, thus contributing to our understanding of language history in this little-known area. Second, the synchronic word-prosodic systems of the daughter languages are genealogically and typologically unusual in two ways: (i) they are all tonal, which is highly uncommon in the Austronesian language family, and (ii) several additionally have contrastive stress, an extremely rare combination crosslinguistically. This paper thus contributes to our theoretical understanding of mechanisms for tone change, as well as how orthogonal systems of lexical tone and lexical stress can emerge and decline. I will conclude that Proto-Maˈya-Salawati itself can be reconstructed with both tone and lexical stress and that several typologically uncommon phonological changes have occurred in the daughter languages—in particular, tone changes conditioned by vowel height and prosodic developments conditioned by syllable loss.
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Oláh, János, Tibor Kovács, and Róbert Horváth. "On the Trichoptera of Batanta Island, West Papua, Indonesia, VII. New leptocerids." Opuscula Zoologica (Budapest) 53, no. 2 (2022): 227–38. https://doi.org/10.18348/opzool.2022.2.227.
Full textAbstract:
Based on newly collected materials here we report new faunistic data for this diverse island and describe five new leptocerid species from the Batanta Island (Indonesia, West Papua, Raja Ampat Archipelago): Oecetis anyam Oláh, sp. nov., O. apam Oláh, sp. nov., O. batanta Oláh, sp. nov., Leptocerus batanta Oláh, sp. nov. Setodes sarlos Oláh, sp. nov. As well as to clear the taxonomic status of Oecetis anyam Oláh, sp. nov. it was necessary to survey the unsettled species group of Oecetis hemerobioides with description of new species from Indonesia, Sumba Island: Oecetis sumbaensis Oláh, sp. nov. and from the Cyclops Mountain of West Papua: Oecetis cyclopensis Oláh, sp. nov.
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Nasrudin, Nasrudin. "Membaca Dan Menafsirkan Temuan Gambar Prasejarah Di Pulau Misool Raja Ampat, Papua Barat." Berkala Arkeologi SANGKHAKALA 18, no. 2 (2017): 150. http://dx.doi.org/10.24832/sba.v18i2.14.
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Traces and evidence of prehistoric civilization in the Indonesian Archipelago have been found, and one of the archaeological types of remains that was the hot topic for researchers nowadays is rock paintings on the walls of karst caves (known as limestone area). We found that karst has the function of conveying historical messages through paintings as a form of communications of Homo sapiens. Based on results of surveys among the karst island of Misool in Raja Ampat islands, we can identify five categories of rock paintings, which are: hands, fauna, anthropomorphic, symbolical (non-figure), circles that resemble wheels/the sun, and square lines. The main and dominant characteristics of Misool rock paintings, particularly in paintings of fish, are their various sizes and rich variations. The prehistoric artworks are very interesting to be investigated more thoroughly to study and understand better the human life in the past. The archaeological survey has yielded new evidence and traces of human life in the past, such as habitation, migration, and modes of living hundreds or maybe even tens of thousand years ago, or during the prehistoric period. This research is the initial step and was carried out using documentation and descriptive methods to be analyzed afterward by various approaches that are being developed nowadays, as well as visual communication through form and non-form analyses.
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Förderer, Meena, and Martin R. Langer. "Five new species and one new genus of recent miliolid foraminifera from Raja Ampat (West Papua, Indonesia)." PeerJ 4 (June 23, 2016): e2157. http://dx.doi.org/10.7717/peerj.2157.
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Raja Ampat is an archipelago of about 1,500 small islands located northwest off the Bird’s Head Peninsula of Indonesia’s West Papua province. It is part of the Coral Triangle, a region recognized as the “epicenter” of tropical marine biodiversity. In the course of a large-scale survey on shallow benthic foraminifera we have discovered one new genus and five new species of recent miliolid benthic foraminifera from the highly diverse reefal and nearshore environments. The new fischerinid genusDentoplanispirinellais characterized by its planispiral coiling and by the presence of a simple tooth, that differentiate it fromPlanispirinellaWiesner. It is represented in our sample material by the new speciesDentoplanispirinella occulta. The other four species described herein areMiliolinella moia, Miliolinella undina, Triloculina kaweaandSiphonaperta hallocki.All new species are comparatively rare and occur sporadically in the sample material. Detailed morphological descriptions, scanning electron microscopy pictures of complete and dissected specimens as well as micro-computed tomography images are provided.
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O’SHEA, MARK, and STEPHEN J. RICHARDS. "A striking new species of Papuan groundsnake (Stegonotus: Colubridae) from southern Papua New Guinea, with a dichotomous key to the genus in New Guinea." Zootaxa 4926, no. 1 (2021): 26–42. http://dx.doi.org/10.11646/zootaxa.4926.1.2.
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We describe a new species of groundsnake of the genus Stegonotus (Colubridae) from the Purari River basin in Gulf Province, Papua New Guinea. The new species can be most readily distinguished from all other New Guinean Stegonotus by its unique dorsal colour pattern which consists of a dark head and creamy-white anterior one third to two thirds of the body, grading into increasingly dense dark pigmentation on the posterior of the body and tail. It is most similar to S. iridis from the Raja Ampat Archipelago off western New Guinea, but that species has a different pattern of pigmentation dorsally, has a lower ventral scale count (198–211 vs. 229–239), and exhibits a different temporal scale arrangement. The description of S. aplini sp. nov. brings to fourteen the number of Stegonotus species described from New Guinea. A dichotomous key to described species in the New Guinea region is provided.
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Günther, Rainer, Stephen Richards, Burhan Tjaturadi, and Keliopas Krey. "Two new microhylid frog species of the genus Xenorhina Peters, 1863 from the Raja Ampat Islands, Indonesia." Vertebrate Zoology 70 (August 4, 2020): 333–47. https://doi.org/10.26049/VZ70-3-2020-06.
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Two new species of the asterophryine microhylid genus <i>Xenorhina</i> are described from the Raja Ampat archipelago off the western tip of New Guinea. Both are medium-sized (snout-urostyle length 29.9 – 35.2 and 28.5 – 39.5 mm), semi-fossorial frogs that call from hidden positions within the litter or under the soil surface. The two new species are morphologically similar but they have different advertisement calls. Although they are probably closely related, genetic studies are required to confirm this. The first species is known only from Salawati Island, a land-bridge island that was connected to the New Guinea mainland during the last glacial period. The second species is currently known only from Waigeo Island, an oceanic island long isolated from New Guinea that is separated from nearby Salawati by a major biogeographic barrier, the narrow but deep Sagewin Strait. Description of these two species appears to be another example of differentiation across this barrier, and brings the total number of <i>Xenorhina </i> known from New Guinea and surrounding islands to 34.
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Muhartono, Rizky, Mira Mira, Estu Sri Luhur, and Siti Hajar Suryawai. "ANALISA KELEMBAGAAN PENGELOLA ENERGI SEBAGAI PENDUKUNG KEBIJAKAN PENGEMBANGAN ENERGI LAUT." Jurnal Kebijakan Sosial Ekonomi Kelautan dan Perikanan 4, no. 1 (2014): 43. http://dx.doi.org/10.15578/jksekp.v4i1.218.
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Sebagai negara kepulauan, Indonesia memiliki potensi yang besar akan energi laut. sepertipasang surut, gelombang laut, perbedaan suhu dan salinitas. Potensi energi tersebut dapat diwujudkanmenjadi energi listrik yang siap pakai. Implementasi potensi energi ini membutuhkan perhitungan aspekteknis yang tepat, seperti lokasi yang dipilih, jenis teknologi yang akan dipakai, biaya yang dibutuhkan.Selain aspek teknis, aspek kelembagaan harus disertakan dalam perhitungan. Tulisan ini bertujuan untukmenganalisis kelembagaan pengelola energi dari aspek regulatif, normatif dan kognitif. Pengumpulandata dilakukan pada tahun 2013 di lima kabupaten yaitu, Gresik, Klungkung, Flores Timur, Raja Ampat,Bangka. Wawancara dilakukan kepada informan yang dianggap mengetahui pengelolaan energi dilokasi. Analisis dilakukan secara deskriptif kualitatif. Hasil penelitian menunjukkan bahwa capaian aspekregulatif terbesar pada Kabupaten Klungkung (Nusa Penida) ( 37,5%), Capaian aspek normatif terbesarterdapat di kabupaten Nusa Penida dan Flores Timur, masing-masing memiliki nilai capaian 45%, padaaspek kognitif menunjukkan bahwa nilai tertinggi (52,5%) terdapat pada Kabupaten Klungkung (NusaPenida). Prioritas lokasi untuk dikembangkan berdasarkan aspek kelembagaan (regulatif, normatif dankognitif) secara berurutan adalah Kabupaten Klungkung, Kabupaten Larantuka, Kabupaten Gresik,Kabupaten Raja Ampat, dan Kabupaten Bangka. Pada wilayah yang memiliki capaian nilai aspekregulatif rendah perlu didorong untuk membuat regulasi dan aturan yang dapat digunakan sebagailandasan dalam pengembangan energi laut. Peningkatan aspek kognitif dan normatif perlu diberikandukungan berupa penguatan sosialisasi, penguatan kapasitas masyarakat dan partisipasi masyarakat.Title: Institutional Analysis Of Energy Management To SupportMarine Energy PolicyAs an archipelago, Indonesia has a huge ocean energy potential, derived from tidal, oceanwaves, temperature and salinity differences. Ocean energy potential transformed into electrical energythat is ready to use. Utilization of energy potential requires intensive assessment on technical aspectssuch as potential location, type of technology introduced, and total cost. In addition to the technicalaspects, institutional factor should be included in the asessment. This paper aims to analyze institutionalaspect, regulative, normative and cognitive. Data collection was conducted in 2013 in five districts:Gresik, Klungkung, East Flores, Raja Ampat, Bangka. Informant interviews were carried out to determineperception of energy management at each site. Data analysis was qualitative description. The resultsshowed that the greatest achievement on the regulative aspects was Klungkung-Nusa Penida (37.5%).The highest achievement on normative aspects were Flores East and Nusa Penida district, with thevalue of 45%. While the cognitive aspect shows that the highest value (52,5%) attained in Klungkungregency. Based on Institutional Aspects (regulative, normative and cognitive), priority locations forenergy development were sequentially Klungkung regency, Larantuka regency, Gresik regency, RajaAmpat Regency, and Bangka regency. It is recommended, for areas with low value of regulativeaspects,regulations should be stipulated for ocean energy development. Improved cognitive andnormative aspects are through strengthening intensive communication with local stake holder,communityengagementand capacity building.
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Dwi Atmaja, Tinton, Ant Ardath Kristi, Agus Risdiyanto, et al. "Fuel Saving on Diesel Genset using PV/Battery Spike Cutting in Remote Area Microgrid." MATEC Web of Conferences 164 (2018): 01045. http://dx.doi.org/10.1051/matecconf/201816401045.
Full textAbstract:
Diesel Generator set was found to be a favorite power generator in a remote area. In this area, diesel genset usually consumes a significant amount of diesel fuel with higher fuel price than an urban area. Diesel Generator capacity conventionally prepared twice bigger or more than the existing load to prevent any load spike from designated equipment. This work implements an Energy Management System to cut the spike with the support from battery storage unit and photovoltaic module. Once the Energy Management System cut the load spike using battery/photovoltaics, Diesel Generator loads no longer need to be irrelevantly bigger than the existing load. The current experiment in the remote island at Raja Ampat archipelago indicates that the using of 80 kVA Diesel Generator can be reduced to 42 kVA Diesel Generator. This Diesel Generator replacement induces fuel consumption up to 50 %. With this designed work, a smart microgrid with PV-Battery-Diesel can be installed in a designated remote area with lower fuel consumption.
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Allen, Gerald R., Mark V. Erdmann, and Renny K. Hadiaty. "Acentrogobius limarius, a new species of goby (Pisces: Gobiidae) from West Papua Province, Indonesia." Journal of the Ocean Science Foundation 15 (September 15, 2015): 33–40. https://doi.org/10.5281/zenodo.896965.
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A new species belonging to the gobiid genus Acentrogobius is described from mud-bottom habitat in 26 m depth on the island of Batanta in the Raja Ampat Islands of West Papua, Indonesia. Acentrogobius limarius is described on the basis of eight specimens, 17.0–33.8 mm SL. Diagnostic features include the combination of 10 segmented dorsal and anal rays, usually 19 pectoral rays, and a live colour pattern featuring a mid-lateral row of four, large black spots, scattered orange to brownish spots on the head and body, a pair of brown stripes across the cheek, and conspicuous dark spotting on the dorsal and caudal fins. The species is particularly unique for the genus in possessing the combination of transverse cheek papillae, a single transverse row of chin papillae, and scales completely covering both the cheek and opercle.
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Susilowati, Endang, Haryono Rinardi, Albert Rumbekwan, Ismail Ali, and Rabith Jihan Amaruli. "The Maritime Cultural Ecology of the Biak People: A Historical Study of the Sowek Region, Supiori Regency, Papua." Jurnal Sejarah Citra Lekha 9, no. 2 (2025): 179–85. https://doi.org/10.14710/jscl.v9i2.68518.
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This article, using historical and ethnographic methods, explores the maritime cultural ecology of the Biak people in Sowek Village, Supiori Regency, Papua, Indonesia. Historically part of the Biak-Numfor and Supiori islands, Supiori became a separate district in 2003 under Law No. 35 of 2003. The Biak people in Sowek Village, who identify as the Sowek people, have lived in the Aruri Archipelago of Supiori Island for centuries. While their language and culture are part of the Biak-Numfor cultural family, their identity is rooted in their specific geographic location. Supiori Regency is predominantly oceanic and covered by mangrove forests, with only 25% of its land being dry. This landscape has shaped the Sowek people's reliance on marine resources and maritime trade. Contact with the outside world began long ago, facilitated by maritime trade and headhunting expeditions to Maluku, Ternate-Tidore, and the Raja Ampat Archipelago. The Sowek people navigate these waters using traditional boats such as the Wairon, Waimansusu, and Karures, guided by advanced astronomical knowledge of constellations like Orion (sawakoi) and Scorpion (romanggwandi). The maritime cultural ecology of the Biak people in Sowek Village, still preserved as a historical heritage, includes traditional fishing with nets, the cultivation of mangosteen (aibon), blacksmithing (kamasan), and the ecological conservation of mangrove forests, which serve as both fish habitats and natural fortifications for the village.
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Allen, Gerald R., Mark V. Erdmann, and N.K. Dita Cahyani. "A new species of damselfish (Chrysiptera: Pomacentridae) from coral reefs of the Solomon Islands." Journal of the Ocean Science Foundation 28 (September 14, 2017): 10–21. https://doi.org/10.5281/zenodo.891041.
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A sixth member of the Chrysiptera oxycephala group of Pomacentridae, Chrysiptera burtjonesi, is described on the basis of 24 specimens, 20.5–48.2 mm SL, collected at the Solomon Islands in the western Pacific Ocean. It differs from other members of the group, including C. ellenae (Raja Ampat Islands, West Papua Province in Indonesia), C. maurineae (Cenderawasih Bay, West Papua Province), C. oxycephala (central Indonesia, Philippines, and Palau), C. papuensis (northeastern Papua New Guinea), and C. sinclairi (Bismarck Archipelago and islands off northeastern Papua New Guinea), on the basis of its distinctive color pattern and a 6.9% divergence in the sequence of the mitochondrial control region from its closest relative (C. maurinae). Adults are primarily grayish brown to greenish except bright yellow on the ventralmost head and body, including the adjacent pelvic and anal fins. Juveniles are mostly neon blue to dark blue with bright yellow pelvic and anal fins. In addition, it is the only species besides C. sinclairi that usually lacks embedded scales on the preorbital and suborbital bones.
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Suruwaky, Amir M., Handayani Handayani, Ivonne M. Leiwakabessy, et al. "The contribution of coastal women to enhance family economics: Case Study of the Ayau Islands, Raja Ampat Regency, West Papua Province." Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil 8, no. 2 (2024): 49–53. http://dx.doi.org/10.29239/j.akuatikisle.8.2.49-53.
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The contribution of women in fisheries at the Ayau Archipelago is vital, this evidence can be regarded in their important role in family. This study aims to examine the contribution of coastal women in improving family economics. The methods used are interviews and Focus Group Discussions (FGD). Our study revealed that their level education are mostly at elementary graduates. Our compiled data analysis listed that their low level graduation are shown in the following list: Meosbekwan Village 60%, Rutum 67%, Abidon 100% and Reni 88%. In addition, they are housewives and helping husband in the various role in order to have additional incomes by producing salted fish, dry sea cucumbers, and sea worms product. Finally, they performed a significant alternative income between IDR 3,000,000 and IDR 5,000,000.00 per month.
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Mahdiyah, Dede, Muhammad Rifqi Dharmawan, and Noval Noval. "Isolation and Identification of Marine Bacteria in Raja Ampat Islands West Papua Producing Antibacterial Against Salmonella typhi and Staphylococcus aureus." Borneo Journal of Pharmacy 7, no. 4 (2024): 395–403. https://doi.org/10.33084/bjop.v7i4.3908.
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Indonesia's vast archipelago harbors a wealth of natural resources, including marine bacteria with potential antibacterial properties. Given the increasing prevalence of antibiotic resistance, particularly against Salmonella typhi and Staphylococcus aureus, there is a pressing need to explore alternative antimicrobial agents. This study aimed to isolate and characterize marine bacteria with antibacterial activity and evaluate their efficacy against S. typhi and S. aureus. Isolation of marine bacteria was conducted using the spread plate method. Antibacterial activity screening of the secondary metabolites was performed using the well diffusion method. Minimum inhibitory concentration (MIC) was determined using the dilution method, while minimum bactericidal concentration (MBC) was determined using the spread plate method. Seven bacterial isolates were obtained, all identified as Gram-negative bacilli. The secondary metabolites of these marine bacteria demonstrated antibacterial activity against both S. typhi and S. aureus, with inhibition zones of 8.50 mm and 8.46 mm, respectively. The MIC for both bacteria was determined to be 1500 μg/mL. Statistical analysis revealed a significant difference in antibacterial activity between the isolates (Kruskal-Wallis Test, p-value = 0.007) and between S. typhi and S. aureus (Mann-Whitney Test, p-value = 0.025). While the secondary metabolites exhibited antibacterial activity against both bacteria, they did not demonstrate bactericidal activity as measured by the MBC test.
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Allen, Gerald R., Mark V. Erdmann, and N.K. Dita Cahyani. "Chrysiptera uswanasi, a new microendemic species of damselfish (Teleostei: Pomacentridae) from West Papua Province, Indonesia." Journal of the Ocean Science Foundation 31 (November 12, 2018): 74–86. https://doi.org/10.5281/zenodo.1482015.
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Chrysiptera uswanasi, n. sp., the seventh member of the Chrysiptera oxycephala species complex of Pomacentridae, is described on the basis of 10 specimens, 24.7–45.3 mm SL, collected at the Fakfak Peninsula of New Guinea (West Papua Province, Indonesia). The new taxon is a microendemic species, found only in a small area around the Fakfak Peninsula. It differs from other members of the group, C. burtjonesi (Solomon Islands), C. ellenae (Raja Ampat Islands, West Papua Province in Indonesia), C. maurineae (Cenderawasih Bay, West Papua Province), C. oxycephala (central Indonesia, Philippines, and Palau), C. papuensis (NE Papua New Guinea, and C. sinclairi (Bismarck Archipelago and islands off NE Papua New Guinea), on the basis of its distinctive color pattern and a 9.3% divergence in the sequence of the mitochondrial control region from its closest relative (C. oxycephala). Adults are mainly greenish yellow grading to pearly gray ventrally with numerous small blue or greenish spots on the head, body, and basal portion of the dorsal, anal, and caudal fins, and juveniles have a distinctive bright blue snout and forehead. The adult differs from the adults of most of the other members of the group in lacking bright yellow on the ventral body, including the pelvic and anal fins. The two other species in the complex that are also lacking bright yellow ventral bodies and fins are C. ellenae, which differs in being overall more green and having an all blue juvenile stage, and C. sinclairi, which is mostly dark blue, both as adults and juveniles.
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Kurniawan Mujiono, Dadang Ilham. "POTENSI BAHARI PULAU DERAWAN MENUJU DESTINASI WISATA KOMPETITIF." Jurnal Dinamika Global 3, no. 02 (2019): 55–87. http://dx.doi.org/10.36859/jdg.v3i02.76.
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As a nation Indonesia famous throughout the world as archipelago state, and those islands provide plenty of tourist destinations. Nowadays, the power of nations unlike in cold war era, where traditional security is measured as the main source of power, however in today�s society non-traditional security become the main power, and one of them is tourism. As a country located in the coral triangle, Indonesia is surrounded by the shallow tropical marine ecosystem, where corals, fishes and other marine creatures are abundant. Indonesia in addition is the biggest contributor for the coral triangle area and Raja Ampat hosting the highest diversity of Marine world followed Derawan Island in East Kalimantan as the second place. This scientific paper will explain the potency of Derawan Island toward the competitive destination.
 In order to analyse the topic, the concept of hospitality will implement and the type of data research is primary, since the author conducting field research in Derawan Island and visiting number of official government agencies which related with the topic of research. The type of the research is descriptive explanative where the author will describe the data and explain about the potency of Derawan Island.
 The research shows that Derawan Island is located in the epicentre of marine biodiversity of the coral triangle. In addition Derawan Island also hosting two of six marine turtles in the world such as hawksbill and green turtle, in terms of dive spot, there are plenty of locations as the dive spot followed with extraordinary view and diversity of underwater world. Moreover related with accommodation, there are plenty of guesthouses, hotels and cottages and tourist can choose based on their budget.
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Beale, Calvin S., Joshua D. Stewart, Edy Setyawan, Abraham B. Sianipar, and Mark V. Erdmann. "Population dynamics of oceanic manta rays ( Mobula birostris ) in the Raja Ampat Archipelago, West Papua, Indonesia, and the impacts of the El Niño–Southern Oscillation on their movement ecology." Diversity and Distributions 25, no. 9 (2019): 1472–87. http://dx.doi.org/10.1111/ddi.12962.
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Gerald, R. Allen, V. Erdmann Mark, and Dita Cahyani N.K. "Review of the Chrysiptera oxycephala complex of damselfishes (Pomacentridae) with descriptions of three new species from the East Indian Archipelago." Journal of the Ocean Science Foundation 17 (December 21, 2015): 15–84. https://doi.org/10.5281/zenodo.891435.
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The nominal species <em>Chrysiptera oxycephala</em> has been considered a widespread species in the East Indian Archipelago, but genetic analyses and a closer examination of populations throughout the region now show it to be another example of a species complex of closely related parapatric cryptic species and genovariant populations. Three DNA lineages correlate with different color patterns and are described here as new species, including<em> Chrysiptera ellenae</em> (Raja Ampat, West Papua, Indonesia), <em>Chrysiptera maurineae</em> (Cenderawasih Bay, West Papua, Indonesia), and <em>Chrysiptera papuensis</em>(northeastern Papua New Guinea). The original<em> C. oxycephala</em> has the widest distribution, including central Indonesia, Sabah, Philippines, and Palau, as well as a local population in Sulawesi with a divergent mtDNA lineage, but no apparent phenotypic difference (Lembeh genovariant). An additional previously described species, <em>C. sinclairi</em>, is restricted to oceanic insular areas of northeastern Papua New Guinea. The five members of the species complex share most meristic and morphometric features, although some differences are evident in the modes and range of fin-ray counts and the number of scales (combined) on the preorbital and suborbital bones. Nevertheless, color patterns, especially those of small juveniles, distinguish five species, i.e. small juveniles entirely light blue (not persisting into adulthood) in<em> C. ellenae</em>; blue with a dark streak on each scale (and pattern persisting into adulthood) in<em>C. sinclairi</em>; light blue anterodorsally and yellow posteroventrally with a blue streak on upper caudal peduncle in <em>C. maurineae</em>; and light blue anterodorsally and yellow posteroventrally but no blue streak on upper edge of caudal peduncle in<em> C. papuensis</em> and<em> C. oxycephala</em>, but the former has the bicolor pattern with a bright yellow tail persisting into adulthood. The geographic distribution corresponds directly with color-pattern differences and mitochondrial-DNA lineages. The divergence in the control-region mtDNA sequence between the five species in the complex ranges from 2.9–10.9%, with the closest relationship between the species pair of <em>C. maurineae</em> and<em> C. sinclairi</em>, who nevertheless have very different color patterns and also differ in meristics. The two mtDNA lineages within<em> C. oxycephala</em>diverge by 3%, greater than the difference between <em>C. maurineae </em>and<em> C. sinclairi</em>. These results indicate that genotypic divergence does not necessarily correlate well with phenotypic divergence within cryptic-species complexes of reef fishes.
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Polhemus, Dan A., and John T. Polhemus. "The Trepobatinae (Gerridae) of New Guinea and surrounding regions, with a review of the World fauna. Part 5. Taxonomic and distributional addenda." Insect Systematics & Evolution 31, no. 3 (2000): 291–316. http://dx.doi.org/10.1163/187631200x00057.
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AbstractThe small waterstriders of the subfamily Trepobatinae have radiated extensively on New Guinea and surrounding archipelagos. The present contribution is the fifth in a series of reports dealing with this endemic fauna, and presents taxonomic and distributional addenda to our previous tribal level treatments. The following new species are described: Ciliometra setosa from southern Papua New Guinea, Ciliometra waigeo from Waigeo and Batanta Islands, Ciliometra minajerwi from southern Irian Jaya, Stygiobates iweka from southern Irian Jaya, Stygiobates mubi from southern Papua New Guinea, Stygiobates rajana from Waigeo and Gam Islands, Calyptobates kopi from southern Irian Jaya, and Calyptobates kamoro from southern Irian Jaya. The previously unknown male of Iobates somare Polhemus & Polhemus is also described, and new distribution records are provided for the following taxa based on recent collections in northern New Guinea and the Raja Ampat Islands: Iobates affinis (Esaki), Metrobatopsis flavonotatus Esaki, Stygiobates iriana Polhemus & Polhemus, Pseudohalobates inobonto Polhemus & Polhemus, Stenobates australicus Polhemus & Polhemus, Stenobates fakfak Polhemus & Polhemus, Stenobates kamojo Polhemus & Polhemus and Rheumatometroides sele Polhemus & Polhemus. New distribution records are also provided for the following species occurring outside the New Guinea region, based on recent collections in Southeast Asia: Calyptobates samarinda Polhemus & Polhemus from Sumba, and Naboandelus signatus Distant from southern Vietnam. Revised keys are presented for the New Guinea species of Ciliometra, Stygiobates, Iobates and Cryptobates, accompanied by updated distribution maps and illustrations of key characters.
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Setyawan, Edy, Mark V. Erdmann, Ronald Mambrasar, et al. "Spatial connectivity of reef manta rays across the Raja Ampat archipelago, Indonesia." Royal Society Open Science 11, no. 4 (2024). http://dx.doi.org/10.1098/rsos.230895.
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The reef manta ray Mobula alfredi is present throughout most island groups that form the Raja Ampat archipelago, Indonesia. The species is protected regionally and nationally and is currently managed as a single homogeneous population within the 6.7 million ha archipelago. However, scientific evidence is currently lacking regarding the spatial connectivity and population structure of M. alfredi within this archipelago. Using network analysis and an array of 34 acoustic receivers deployed throughout Raja Ampat between February 2016 and September 2021, we examined the movements of 72 subadult and adult M. alfredi tagged in seven regions of Raja Ampat. A total of 1094 M. alfredi movements were recorded and were primarily concentrated between nearby receiver stations, highlighting frequent local movements within, and limited long-distance movements between regional acoustic receiver arrays. Network analysis revealed highly connected nodes acting as hubs important for M. alfredi movements. A community detection algorithm further indicated clusters within the network. Our results suggest the existence of a metapopulation comprising three demographically and geographically distinct subpopulations within the archipelago. They also reveal the importance of Eagle Rock as a critical node in the M. alfredi movement network, justifying the urgent inclusion of this site within the Raja Ampat marine protected area network.
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Arnold, Laura. "Ambel." Journal of the International Phonetic Association, December 22, 2020, 1–21. http://dx.doi.org/10.1017/s0025100320000237.
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Ambel (ISO 639-3: wgo) is an Austronesian language spoken by approximately 1600 people on the island of Waigeo in the Raja Ampat archipelago (West Papua province, Indonesia). Within Austronesian, Ambel belongs to the South Halmahera-West New Guinea (SHWNG) subbranch (see Blust 1978); within SHWNG, Ambel is classified as a Raja Ampat–South Halmahera language (RASH; Remijsen 2001:32–37; Kamholz 2014). Other languages spoken in Raja Ampat include Maˈya, Matbat, Biga, Batta, and several closely-related varieties on Salawati island (all RASH); Biak (a non-RASH SHWNG language); and varieties of Malay, in particular Papuan Malay. While historically Maˈya and Biak were used as lingua francas throughout the archipelago, these days Malay is the dominant language. The spread of Malay in recent decades has been facilitated by improvements in telecommunications and infrastructure in the region; the government-backed immigration of Indonesians from the overcrowded western islands of the nation to the more sparsely populated Papua; and a rapidly growing tourist industry throughout Raja Ampat.
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Schrader, Julian, Soetjipto Moeljono, Junus Tambing, Cornelia Sattler, and Holger Kreft. "A new dataset on plant occurrences on small islands, including species abundances and functional traits across different spatial scales." Biodiversity Data Journal 8 (September 10, 2020). http://dx.doi.org/10.3897/bdj.8.e55275.
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We introduce a new dataset of woody plants on 60 small tropical islands located in the Raja Ampat archipelago in Indonesia. The dataset includes incidence, abundance and functional trait data for 57 species. All islands were sampled using a standardised transect and plot design providing detailed information on plant occurrences at different spatial scales ranging from the local (plot and transect scale) to the island scale. In addition, the dataset includes information on key plant functional traits linked to species dispersal, resource acquisition and competitive strategies. The dataset can be used to address ecological questions connected to the species-area relationship and community assembly processes on small islands and in isolated habitats. The dataset yields detailed information on plant community structure and links incidence, abundance and functional trait data at different spatial scales. Furthermore, this is the first plant-island dataset for the Raja Ampat archipelago, a remote and poorly studied region, and provides important new information on species occurrences.
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Sri Astuti. "Stagnate to Extensive: The Design of Capital City Development in Coastal Archipelago Raja Ampat." Journal of Civil Engineering and Architecture 6, no. 2 (2012). http://dx.doi.org/10.17265/1934-7359/2012.02.011.
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Yohanita, Aksamina Maria. "MAMALIA ASAL PULAU GAM, KEPULAUAN RAJA AMPAT DENGAN BEBERAPA CATATAN BARU." VOGELKOP: Jurnal Biologi 1, no. 1 (2018). http://dx.doi.org/10.30862/vogelkopjbio.v1i1.20.
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ABSTRACTDuring 4 days fieldwork rapid inventory on the low land forest Gam Island, Raja Ampat Archipelago West Papua. Eksploration is the methods used in this study. Mammals were collected on the night with mist-net, and life trap (elliot trap)in forest, garden, and cave araund Yenbeser village. The result showed that 14 species of mammalian and six other allegedly species were found. We found an endemic species of Waigeo Island, Spilocuscus papuensis, and nine other mammals as the new record. That place showed a very good habitat forest to support many species of animal live. There are three species enter the Appendix II CITES and Indonesian government regulation, PP RI No. 7 1999. So far, there is no threat for the forest habitat of mammals by local communities. ABSTRAKInventarisasi cepat mamalia di Pulau Gam Kepulauan Raja Ampat selama empat hari menggunakan metode eksplorasi dengan teknik penangkapan langsung, pemasangan jaring kabut, pemasangan perangkap hidup, dan observasi malam. Habitat yang dikunjungi meliputi hutan, kebun dan goa di sekitar Kampung Yenbeser Pulau Gam. Hasil temuan mengejutkan, sebanyak 14 spesies mamalia berhasil dicatat dan dugaan kehadiran spesies lainnya sebanyak enam spesies menghuni pulau Gam. Pada penelitian ini juga berhasil menemukan spesies endemik Pulau Waigeo yaitu Spilocuscus papuensis dan sembilan spesies mamalia lainnya termasuk laporan baru dalam penelitian ini. Dari 20 spesies mamalia, tiga spesies diantaranya masuk CITES Appendix II serta dilindungi oleh regulasi Indonesia, PP RI No 7 tahun 1999. Sejauh ini, tidak terlihat adanya ancaman dari masyarakat lokal terhadap hutan sebagai habitat mamalia sehingga keberlangsungan hidup hewan dapat terjaga dengan baik.
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Andradi-Brown, Dominic A., Angela J. E. Beer, Luigi Colin, et al. "Highly diverse mesophotic reef fish communities in Raja Ampat, West Papua." Coral Reefs, October 29, 2020. http://dx.doi.org/10.1007/s00338-020-02020-7.
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Abstract Mesophotic coral ecosystems (MCEs; reefs 30–150 m depth) are poorly studied, with existing research heavily geographically biased away from the most species-rich reef regions. Yet, MCEs are of high interest because of their unique species and potential to act as refuges from the impacts of fishing. Using baited remote underwater video systems, we surveyed reef fish communities from 2 to 85 m depths throughout the Raja Ampat archipelago in West Papua, Indonesia—an area considered the heart of the Coral Triangle where coral reef biodiversity is greatest. We sought to provide the first assessment of fish communities across this depth gradient in the region and identify whether human population density and market access differently affected fish abundance based on depth. Here we show that—similar to shallow reefs—Raja Ampat MCEs are exceptionally diverse, with 152 fish species recorded at depths greater than 40 m. We found that fish community structures were highly depth driven, with declines in fish abundance at increased depth. In contrast to previous studies elsewhere in the world, we found that the proportion of planktivores declined across the shallow reef to MCE depth gradient. While greater human population density correlated with lower Epinephelidae and Lutjanidae abundance (two key fisheries families), we did not find evidence that MCEs provide a depth refuge from fishing. Surprisingly, we also found that fish abundance declined at greater distances from the major regional market—likely caused by historical fisheries pressure in more remote areas. These results both expand upon and contrast some previously established MCE-depth patterns and human impact patterns on fish communities, suggesting that regional context and historical pressures matters. Our findings highlight the need for future MCE studies within the Coral Triangle region.
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Arnold, Laura. "The Diachrony of Word Prosody in the Maˈya-Salawati Languages of Raja Ampat". Oceanic Linguistics, травень 2025. https://doi.org/10.1353/ol.2025.a960254.
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In this paper, I reconstruct the word-prosodic system of Proto-Maˈya- Salawati, the parent of several Austronesian languages of the Raja Ampat archipelago in northwest New Guinea. The aim of this reconstruction is twofold. First, word-prosodic changes in the daughter languages provide evidence for the subclassification of this branch, thus contributing to our understanding of language history in this little-known area. Second, the synchronic word-prosodic systems of the daughter languages are genealogically and typologically unusual in two ways: (i) they are all tonal, which is highly uncommon in the Austronesian language family, and (ii) several additionally have contrastive stress, an extremely rare combination crosslinguistically. This paper thus contributes to our theoretical understanding of mechanisms for tone change, as well as how orthogonal systems of lexical tone and lexical stress can emerge and decline. I will conclude that Proto-Maˈya-Salawati itself can be reconstructed with both tone and lexical stress and that several typologically uncommon phonological changes have occurred in the daughter languages—in particular, tone changes conditioned by vowel height and prosodic developments conditioned by syllable loss.
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Setyawan, Edy, Ben C. Stevenson, Mark V. Erdmann, et al. "Population estimates of photo-identified individuals using a modified POPAN model reveal that Raja Ampat’s reef manta rays are thriving." Frontiers in Marine Science 9 (November 15, 2022). http://dx.doi.org/10.3389/fmars.2022.1014791.
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The 6.7-million-hectare Raja Ampat archipelago is home to Indonesia’s largest reef manta ray (Mobula alfredi) population and a representative network of nine marine protected areas (MPAs). However, the population dynamics of M. alfredi in the region are still largely unknown. Using our photo-identification database, we fitted modified POPAN mark-recapture models with transience and per capita recruitment parameters to estimate key demographic characteristics of M. alfredi from two of Raja Ampat’s largest MPAs: Dampier Strait and South East (SE) Misool. A total of 1,041 unique individuals were photo-identified over an 11-year period (2009–2019) from Dampier Strait (n = 515) and SE Misool (n = 536). In our models, apparent survival probabilities and per capita recruitment rates were strongly linked with El Niño–Southern Oscillation (ENSO) events. Our models also estimated high apparent survival probabilities and significant increases in (sub)population sizes in both MPAs over a decade. In Dampier Strait, the estimated population size increased significantly (p = 0.018) from 226 (95% CI: 161, 283) to 317 (280, 355) individuals. Likewise, the estimated population size in SE Misool increased significantly (p = 0.008) from 210 (137, 308) to 511 (393, 618) individuals. Regardless of variation in the percentage change in population size between years throughout the study, the estimated overall population change shows a compound growth of 3.9% (0.7, 8.6) per annum in Dampier Strait and 10.7% (4.3, 16.1) per annum in SE Misool. Despite the global decline in oceanic sharks and rays due to fishing pressure in the last five decades, our study demonstrates the positive impact of a suite of long-term conservation efforts, coupled with the influence of ENSO events, on increasing M. alfredi abundance in Raja Ampat MPAs. Our study also underscores the importance of long-term monitoring to evaluate the effectiveness of conservation management measures on manta ray populations. Our modification of the standard POPAN model by incorporating per capita recruitment and transience parameters represents an important advance in mark-recapture modelling that should prove useful when examining other manta ray populations and other highly migratory species that are likely to have a substantial percentage of transient individuals.
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Lanuru, Mahatma, Khairul Amri, Supriadi Mashoreng, Dahlan Dahlan, and Yunus Paulangan. "ANALYSIS OF THE OCEANOGRAPHIC CONDITIONS OF MEOSBEKWAN ISLAND (RAJA AMPAT DISTRICT) FOR THE SUITABILITY OF SEAWEED CULTIVATION." Jurnal Ilmu Kelautan SPERMONDE, October 4, 2023, 22–28. http://dx.doi.org/10.20956/jiks.v9i2.27367.
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Seaweed cultivation is an alternative community livelihood that potentially helping to reduce pressure on coral reefs in the area of Raja Ampat Archipelago. This study was aimed to conduct an oceanographic analysis of the waters of Meosbekwan Island (Raja Ampat Regency) for the suitability of seaweed cultivation. Oceanographic data collection was carried out at three points (M1, M2, and M3) on the western side of Meosbekwan Island. Analysis of suitability for aquaculture was initiated with an analysis of key parameters, i.e., depth, protection and shipping traffic. The suitability analysis was followed by an analysis of the oceanographic parameters of the waters by weighting them using a ranking system. Furthermore, the final stage of suitability analysis was to evaluate the feasibility level of seaweed cultivation. The results showed that the depth of the waters on the western side of Meosbekwan Island ranged from 1.3 m – 5.8 m with an average depth of 1.5 m in the south (M1), 2.2 m in the middle (M2), and 3.9 m to the north (M3). Wave height during the study ranged from 0.1 – 0.3 m with an average value of 0.25 m at all points. The velocity of the water currents ranged from 0.08 – 0.25 m/s. The salinity of the waters was relatively homogeneous (30 - 31 o/oo). Water temperature also has small and relatively homogeneous variations with a range of 30 - 31˚C. The brightness of the waters ranged from 2.5 – 3.5 m. The bottom of the waters on the west side of Meosbekwan Island generally consists of coarse sand, rubble, and seagrass vegetation Enhalus acoroides and Cymodocea sp. In general, the oceanographic conditions of the waters are suitable for the life and growth of seaweed. The results of the location suitability evaluation indicated that the waters on the western side of Meosbekwan Island were technically feasible to serve as a location for seaweed cultivation.
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Mujiono, Dadang Ilham Kurniawan. "ABRASION IN DERAWAN ISLAND (THE CAUSE AND THE PROPER SOLUTION)." Jurnal Segara 16, no. 1 (2020). http://dx.doi.org/10.15578/segara.v16i1.7501.
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As an archipelago state, Indonesia globally famous with marine mega biodiversity. This country contribute the largest area among 6 countries under the Coral Triangle initiative. The area contains almost 600 species of corals and 76% of total corals worldwide are found in the coral triangle. Moreover, 574 of coral species which 72% of total corals globally are located in Indonesia, and Raja Ampat as the largest marine biodiversity in Indonesia, followed by Derawan Island in the second place. Derawan Island is located in East Kalimantan Province. Despite having an extraordinary marine biodiversity, this island experienced several environment issues. One of them is Abrasion. In terms of methodology, this scientific paper adopt the concept of abrasion, and the type of the research is description explanation which explain the cause of abrasion in Derawan Island and the possible solution which will be implemented in Derawan Island authority. The data type is primer. The Author conducted field research and obtained the data by collecting it from relevant institution, observation and interview. As the result, the research shows that Derawan Island experienced massive abrasion in the east side of the island due to a big numberof residence developments in the South area of the island. As the consequences, the water current which carried sand from East and West side stuck in the South area of the island.
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Subekti, Lukman, Candra Febri Nugraha, Muhammad Arrofiq, Ahmad Adhiim Muthahhari, Budi Eko Prasetyo, and Qurrota A’yun. "Techno-Economic Analysis for Raja Ampat Off-Grid System." Jurnal Nasional Teknik Elektro, March 31, 2024, 42–50. http://dx.doi.org/10.25077/jnte.v13n1.1180.2024.
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Indonesia, an expansive archipelagic nation with over 17,000 islands, encounters significant challenges in ensuring a sustainable and dependable electricity supply, particularly in its West Papua region. The reliance on diesel fuel for electricity generation in this area poses substantial environmental risks and incurs high costs. A comprehensive research study addressing the environmental and economic challenges associated with diesel dependence in West Papua proposed a shift towards sustainable and cost-effective solutions by advocating for adopting off-grid hybrid power systems. This study targeted Yensawai Village in the Raja Ampat Islands, employing a detailed techno-economic analysis through HOMER Pro to identify the most cost-effective system configurations. The findings indicated that the optimal setup consists of a 160 kW diesel generator, complemented by a 70.1 kW solar photovoltaic (PV) system, a 30 kW inverter, and an 80 kWh battery storage unit. This configuration not only proved to be economically viable by reducing the levelized cost of electricity (CoE) by 15.7%—achieving a CoE of $0.236/kWh compared to the base scenario's $0.280/kWh—but also highlighted the potential for similar benefits across regional systems. By focusing on the economic advantages of hybrid energy configurations, this research contributes significantly to the broader discourse on sustainability and the urgent need to reduce diesel dependence, offering a practical approach to cutting electricity generation costs in remote island communities and advancing sustainability initiatives.