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IDENTIFICATION OF CUSTOMARY RULES IN PRIVATE FOREST MANAGEMENT ON SIHUTINGCUSTOMARY LAND, ARITONANG VILLAGE,MUARA DISTRICT, NORTH TAPANULI REGENCY Andrian Sianturi; Muhammad Mardhiansyah; Yossi Oktorini
JURNAL ILMU-ILMU KEHUTANAN Vol 5, No 1 (2021)
Publisher : Fakultas Pertanian, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jiik.5.1.41-46

Abstract

Private forest of Aritonang village is on customary land which is the inheritance of the ancestors in the form of gift/wages by Raja Aritonang to Ompu Guru Sukkunon (a descendant of the Ompusunggu clan) and Ompu Guru Solupa (a descendant of the Rajagukguk clan) are managed based on customary rules. The purpose of this research was to identify the customary rules that apply and to find out the benefits of customary rules in the management of private forests in the customary land of the village of Aritonang. This research was conducted in Aritonang village, Muara Distric, North Tapanuli Regency in April - May 2019. This research used purposive sampling technique to selection of informants. Namely the male lineage and the female lineage of Guru Sukkunon and Guru Solupa who live in hamlet 1 of Aritonang village as much as 36 families, Non-descendant communities Ompu Guru Sukkunon and Ompu Guru Solupa (relatives) who are domiciled in hamlet 1 of Aritonang village as many as 6 families and Batu Binumbun village community who border directly with customary land of Sihuting in Aritonang village as much as 1 family. And this research used qualitative descriptive analysis to analyze the data. Customary rules that apply in the management of Aritonang’s Sihuting private forest cover the process of granting and inheriting management rights of the land land, the time span of use and omission of land, types of plants that are allowed to be planted and/or cared for, yields, establish houses, and determination of sanctions for violators of customary law. The benefits of customary rules in the management of Aritonang’s Sihuting customary forests are the maintenance of order and justice in the process of granting and managing the management rights of customary land.
CHARACTERISTICS OF MANGROVE LAND COVER SPECTRAL USING SENTINEL-2A SATTELITE IMAGE IN KEMBUNG RIVER BENGKALIS REGENCY RIAU PROVINCE Gustiara Ningsih; Yossi Oktorini; Viny Volcherina Darlis
JURNAL ILMU-ILMU KEHUTANAN Vol 2, No 2 (2018)
Publisher : Fakultas Pertanian, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1082.848 KB) | DOI: 10.31258/jiik.2.2.48-56

Abstract

In visual way, distinguishing mangrove land cover located in Kembung river Bengkalis is hard to do especially if it is using far remote sensing technology. However by applying spectral analyze method, this problem is possibly fixed. It started by taking area sample (training area) 3x3 pixels as many as 10 areas for each classes of land cover, then the result obtained is analyzed by statistical variability test before continued to DMRT test to measure the ability of separation by using separability. Based on the analysis of variability to the spectral value of sattelite vision Sentinel-2A that F-hit (17,626) higher than F-tab (1,98), it showed the treatment has significant effect. The result of DMRT test on reflectancy value of spectral sattelite vision sentinel-2A can be classified into five spectral groups and DMRT test to the mangrove land cover consisted of four groups. Meanwhile, based on separability test there are 36 class pairs, 32 (90,9%) can be separated each way, while 4 (9,1%) can not be separated.
PEMETAAN DETAIL TUTUPAN LAHAN MENGGUNAKAN PESAWAT TANPA AWAK DI ARBORETUM UNIVERSITAS RIAU DAN SEKITARNYA Wahyu Bintoro; Yossi Oktorini; Viny Volcherina Darli
JURNAL ILMU-ILMU KEHUTANAN Vol 2, No 1 (2018)
Publisher : Fakultas Pertanian, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1063.926 KB) | DOI: 10.31258/jiik.2.1.15-25

Abstract

Unmanned aerial vehicle is one way to get the information of spatial data that photographed in detail small objects on the land with coverage area that is not too broad. The photo shoot was done in the Riau University Arboretum and surrounding areas. The location of the photo shoot on the research including scientific development zone to study forest ecosystems, activities of Student Affairs and the place that usually visited by community. This research aims to mapping and to know the land cover in the Riau University Arboretum and to know value of the accuracy test of the aerial photography from the unmanned aerial vehicle. The aerial photography is analyzed by visual interpretation, the maximum scale based on spatial resolution and use omission commission testing accuracy to compare the value of the observed object in the field and aerial photograph. The bounderies of Riau University Arboretum is not in the field physically, so the Riau University Arboretum as a landmark. The result of the maximum scale is 1:100 with 2.77 cm spatial resolution, so it seems clear the land cover in the aerial photography i.e. vegetation, buildings, and undeveloped land. The result of accuracy test that was conducted showed that the percentage of accuracy reaches 95%, so that the data from the unmanned aerial vehicle can be utilized for mapping a region.
KEANEKARAGAMAN JENIS REPTIL DI KAWASAN HUTAN LARANGAN ADAT KENEGERIAN RUMBIO KECAMATAN KAMPAR KABUPATEN KAMPAR Nur Fitriana; Defri Yoza; Yossi Oktorini
JURNAL ILMU-ILMU KEHUTANAN Vol 1, No 2 (2017)
Publisher : Fakultas Pertanian, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (179.168 KB) | DOI: 10.31258/jiik.1.2.1-9

Abstract

Rumbio village in Kampar district Kampar regency Riau province began to be recognized by local and foreign communities due to the existence of the Forest Reserve. The Forest Reserve of Kenegerian Rumbio it stored a variety of natural resources as well as the flora and fauna typical to this area.One of the richness of the fauna in the Rumbio cutomary prohibition forest are reptiles that need preservation to avoid extinction. Research on reptile diversity is one of the efforts to preserve the existence of reptiles. The purpose of this research is to identify the types of reptiles found in Rumbio customary prohibition forest,reptile diversity known by using of Visual Encounter Survey (VES) method and Passive sampling. The results showed that the reptile species found were 116 individuals from 10 species and 5 families. Families that found such as Gekkonidae, Geomydidne, Homalopsis buccata, Colubridae, Scincidae.
KEANEKARAGAMAN JENIS POHON DI HUTAN LARANGAN ADAT IMBO PUTUI DESA PETAPAHAN KABUPATEN KAMPAR PROVINSI RIAU Widia Safitri; Defri Yoza; Yossi Oktorini
JURNAL ILMU-ILMU KEHUTANAN Vol 3, No 2 (2019)
Publisher : Fakultas Pertanian, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.284 KB) | DOI: 10.31258/jiik.3.2.17-22

Abstract

Imbo Putui Prohibition Forest was located in Petapahan Village, Tapung District, Kampar Regency, Riau Province. The area of Imbo Putui Prohibition Forest is 250 ha. Imbo Putui Prohibition Forest was known to store a great variety of species, both flora and fauna. There are 59 different types of trees from 24 different families and there are 6 types of trees that have an important value index (INP) of more than 15%, the type was medang, mempening, kelat, meranti, lalan and kempas. It was necessary to do research with the title of Tree Species Diversity in Imbo Putui Prohibition Forest in Petapahan Village, Kampar Regency, Riau Province, which aims to determine the diversity of tree species found in the Imbo Putui Indigenous Forest. So that the value of plant species diversity in the Imbo Putui Prohibition Forest was obtained was high, which was 3.28. The value of Imbo Putui Indigenous Forest Prohibition species was high, which was 8.68. The evenness index value in the Imbo Putui Prohibition Forest was high at 0.80.
Land Cover Changes Monitoring of Kerumutan Protected Forest by Using Landsat Imageris Supriyan Syahrizal; Yossi Oktorini; Rudianda Sulaeman
JURNAL ILMU-ILMU KEHUTANAN Vol 2, No 2 (2018)
Publisher : Fakultas Pertanian, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.649 KB) | DOI: 10.31258/jiik.2.2.57-64

Abstract

Kerumutan Protected Forest is a conservation forest area in Riau Province which has the characteristics of peat swamp forest. This area has a disturbance of forest areas, illegal logging and forest fires that affect changes in forest cover. To determine the land cover changes in Kerumutan Protected Forest, monitoring was conducted to see land cover changes in the area. The purpose of this research was determined the land cover changes condition in Kerumutan Protected Forest area through interpretation of landsat imageris during 1996, 2008, 2013, and 2017. This research was carried out using the overlay process, test of accuracy and classification of reports between two classes of land cover in different years so that changes could determined. Based on results from landsat imageris analysis during 1996, 2008, 2013, and 2017, the land cover area of Kerumutan Protected Forest has changed, during 1996-2018 the primary land cover of wetland forest decreased to 14164,56 ha, secondary wetland forest increased to 13392,81 ha, swamps land increased to 7,83 ha, shrubs land decreased to 251,55 ha, open ground land increased to 33,21 ha, water body decreased to299,7 ha. During 2008-2013 the primary wetland forest decreased to 5604,39 ha, secondary wetland forest decreased to 12378,06 ha, swamps land increased to 19016,64 ha, shrubs land increased to 482,67 ha, open ground land increased to 276,39 ha, body water increased to 318,8 ha. During 2013-2017 the primary wetland forest increased to 17527,23 ha, secondary wetland forest decreased to 16779,33 ha, swamps land decreased to 4298,49 ha, shrubs land increased to 81,36 ha, open ground land decreased to 880,83 ha, and the body water increased to 336,06 ha.
Keragaman, Distribusi dan Kelimpahan Chaetognatha di Kawasan Pesisir Kota Dumai Provinsi Riau Eko Prianto; Romie Jhonnerie; Yossi Oktorini; Adriman Adriman; Budijono Budijono
Jurnal Kelautan Vol 15, No 2: Agustus (2022)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v15i2.13168

Abstract

ABSTRAKChaetognatha atau cacing panah (arrow worm) merupakan salah satu kelompok holoplankton yang distribusi dan keragamannya cukup tinggi di perairan. Chaetognatha memiliki peran yang sangat penting didalam rantai makanan dan juga berfungsi sebagai bioindikator kondisi oceanograf suatu wilayah. Kelimpahan Chaetognatha di dalam perairan dapat mempengaruhi kelimpahan larva ikan dan zooplankton lainnya, sehingga informasi keberadaannya sangat penting dalam pengelolaan perikanan. Penelitian ini bertujuan untuk mengetahui keragaman, distribusi dan kelimpahan Chaetognatha di perairan pesisir Kota Dumai Provinsi Riau. Penelitian ini dilaksanakan pada bulan April hingga September 2021 di perairan pesisir Kota Dumai. Jumlah stasiun pengambilan sampel sebanyak tiga titik dengan jumlah pengambilan sampel sebanyak dua kali pada masing-masing stasiun. Jumlah jenis Chaetognatha di perairan pesisir Kota Dumai tergolong rendah hanya ditemukan 2 jenis yaitu Eukronia calliops dan Sagitta megalopthalmus. Distribusi Chaetognatha di perairan Kota Dumai cukup merata dan ditemukan di ketiga lokasi penelitian walaupun kelimpahan yang relatif berbeda. Kelimpahan Chaetognatha berkisar antara 19-322 ind/1000 m3, namun jika dibandingkan dengan perairan lainnya, kelimpahan dilokasi studi sangat rendah.Kata kunci: Chaetognatha, keragaman, Kota Dumai, perairan pesisirABSTRACTChaetognatha or arrow worms are one of the holoplankton groups whose distribution and diversity is quite high in waters. Chaetognatha has important role in the food chain and also functions as a bioindicator of oceanographic conditions. The abundance of Chaetognatha in the waters can affect the abundance of fish larvae and other zooplankton, so that information on its existence is very important in fisheries management. The aims of study to determine the diversity, distribution and abundance of Chaetognatha in the coastal waters of Dumai City, Riau Province. This research was conducted from April to September 2021 in the coastal waters of Dumai City. The number of sampling stations are three points and the number of samplings twice at each station. The number of Chaetognatha species in the coastal waters of Dumai City is relatively low, only 2 species were found, namely Eukronia calliops and Sagitta megalopthalmus. The distribution of Chaetognatha in the waters of Dumai City was quite even and found in three sites, although the abundances were relatively different. The abundance of Chaetognatha ranges from 19-322 ind/1000 m3, it is very low compare to other research.Key word: Chaetognath, coastal waters, diversity, Dumai City
“SISTEM PAJAK” SEBAGAI INSTRUMENT PENGELOLAAN SUMBERDAYA PERIKANAN SUNGAI DAN RAWA BANJIRAN BERBASIS KEARIFAN LOKAL DI DESA TAMBAK KECAMATAN LANGGAM PROVINSI RIAU Prianto, Eko; Jhonnerie, Romie; Oktorini, Yossi; Fauzi, Muhammad; Budijono, Budijono
Jurnal Kebijakan Perikanan Indonesia Vol 15, No 1 (2023): (Mei) 2023
Publisher : Pusat Riset Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jkpi.15.1.2023.11-20

Abstract

Hak pengelolaan perikanan (HPP) merupakan salah satu instrument pengelolaan perikanan yang mampu mengurangi laju tangkapan lebih dan meredam konflik perikanan. Di Indonesia penerapan HPP banyak dilakukan oleh masyarakat adat melalui kearifan lokal setempat. Penerapan kearifan lokal sebagai instrumen pengelolaan sumberdaya perikanan khususnya di perairan daratan saat ini masih sangat terbatas khususnya di Provinsi Riau. Penerapan HPP di perairan darat dapat dilihat di Desa Tambak Kabupatan Pelalawan melalui sistem pajak. Penerapan sistem pajak ini telah dilakukan secara turun temurun dan mampu meredam konflik antar sesama nelayan. Tujuan penulisan ini adalah mendeskripsikan sistem pajak sebagai instrument pengelolaan perikanan di sungai dan rawa banjiran berbasis kearifan lokal di Desa Tambak. Data dan informasi berasal dari hasil survei dan wawancara kepada para pemangku kepentingan yang diperkaya dengan studi pustaka. Desa Tambak memiliki potensi sumberdaya perikanan yang cukup besar dengan kegiatan perikanan tangkap lebih dominan. Penangkapan ikan di sungai-sungai dan rawa banjiran umumnya masih menggunakan cara-cara tradisional dengan metode sederhana. Di Desa Tambak setidaknya ditemukan + 53 jenis dengan rata-rata hasil tangkapan nelayan di lokasi lelang berkisar 6-10 kg/hari. Pelaksanaan sistem pajak murni sepenuhnya dikoordinir oleh ninik mamak. Lokasi yang dipajak sebanyak 20 danau dan pelelangannya dilakukan setiap tahun. Harga masing-masing danau yang dipajak akan berbeda-beda setiap tahunnya. Nilai masing-masing danau ini tidak ditentukan oleh ninik mamak tetapi tergantung dengan penawaran tertinggi dari peserta sehingga peserta dengan penawaran tertinggilah yang keluar sebagai pemenangnya. Penerapan sistem pajak sebagai instrument pengelolaan sumberdaya perikanan berkelanjutan sangat tepat sekali karena implementasinya mampu menjaga kelestarian sumberdaya perikanan dan meredam konflik.The auction system is a local wisdom developed in Langgam District, Kampar Regency and is still being implemented. Applying this auction system has provided benefits but still needs to be improved in preserving fish resources. Some of the auction system's weaknesses include tuguk, year-round fishing, and the absence of reservat. To ensure the sustainability of fish resources, it is necessary to improve the implementation of the auction system. This paper aims to describe the auction system “sistem pajak” as an instrument for managing fishery resources in rivers and floodplain based on local wisdom in the Langgam subdistrict and formulate policies to improve the auction system “sistem pajak” regulations. Data and information come from surveys and stakeholder interviews enriched by literature studies. Langgam subdistrict has a large potential for fisheries resources, with capture fisheries activities being more dominant using traditional methods. In the Langgam subdistrict, at least 53 species were found, with the average fishermen catch at auction sites ranging from 6-10 kg/day. Implementing the pure “sistem pajak” is coordinated by ninik mamak. The proceeds from the Pajak Sistem are used for social and development activities. Although implementing this”sistem pajak” can reduce conflict and provide economic benefits to the community, several policies need to be implemented, including i) banning the use of tuguk, ii) implementing an open-close fishing system, iii) creating fishery reserves (reservats), and iv) carry out periodic supervision involving Pokmaswas, auction winners and traditional leaders
KEARIFAN LOKAL MASYARAKAT ADAT DALAM MENGELOLA SUMBER DAYA PERIKANAN BERBASIS EKOSISTEM DI SUNGAI KAMPAR PROVINSI RIAU: STUDI KASUS LUBUK LARANGAN Prianto, Eko; Jhonnerie, Romie; Oktorini, Yossi; Fauzi, Muhammad
Jurnal Kebijakan Perikanan Indonesia Vol 16, No 1 (2024): (Mei) 2024
Publisher : Pusat Riset Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jkpi.16.1.2024.27-37

Abstract

Sumber daya ikan di Sungai Kampar memainkan peran penting bagi masyarakat setempat, namun saat ini menghadapi ancaman overfishing. Salah satu pendekatan untuk mengatasi masalah ini melalui pengelolaan perikanan berbasis Hak Pengelolaan Perikanan (HPP), yang banyak diadopsi oleh masyarakat adat Indonesia melalui kearifan lokal. Salah satu model pengelolaan perikanan berbasis kearifan lokal yang banyak diterapkan disepanjang Sungai Kampar adalah "lubuk larangan”. Tujuan penulisan ini adalah untuk menggambarkan penerapan lubuk larangan sebagai instrumen pengelolaan sumberdaya perikanan berbasis ekosistem di Sungai Kampar dan implikasi didalam penerapannya. Penerapan lubuk larangan sepenuhnya di bawah tanggung jawab ninik mamak dengan dukungan aktif dari masyarakat. Hasil lubuk larangan sepenuhnya diperuntukkan untuk pembangunan dan kegiatan sosial seperti membangun masjid, jalan, menyantuni anak yatim, kegiatan olah raga dan sebagainya. Penerapan "lubuk larangan" menunjukkan aspek penting dalam pengelolaan perikanan berbasis ekosistem, termasuk konservasi sumber daya perikanan, dukungan terhadap keseimbangan ekosistem, perlindungan spesies terancam punah, peningkatan hasil tangkapan jangka panjang, distribusi sumber daya ikan secara adil, pendekatan terpadu dalam pengelolaan, serta partisipasi dan pengawasan masyarakat.Fish resources in the Kampar River play an important role for local communities but are currently facing the threat of overfishing. One approach to overcome this problem is through fisheries management based on Fishery Management Rights, which is widely adopted by Indonesian indigenous communities through local wisdom. One fisheries management model based on local wisdom widely applied along the Kampar River is "lubuk larangan". The purpose of this paper is to describe the application of lubuk larangan as an instrument for ecosystem-based fisheries resource management in the Kampar River and the implications in its implementation. The full implementation of lubuk larangan is below ninik mamak's responsibility with active support from the community. The proceeds from lubuk larangan are fully intended for development and social activities such as building mosques, roads, assisting orphans, sports activities, etc. The application of "lubuk larangan" shows an important aspect in ecosystem-based fisheries management, including conservation of fisheries resources, support for ecosystem balance, protection of endangered species, increase in long-term catches, fair and equitable distribution of fish resources, an integrated approach to management, and community-based participation and supervision.
IDENTIFIKASI SIFAT FISIK TANAH INCEPTISOL PADA PENGGUNAAAN LAHAN (LAND USED) DI SEKITAR KAWASAN KAMPUS BINA WIDYA UNIVERSITAS RIAU harahap, ari azhari; Idwar, Idwar; Oktorini, Yossi; Qomar, Nurul; Darlis, Viny Volcherina; Pebriandi, Pebriandi
Sylva Jurnal Ilmu-ilmu Kehutanan Vol 11, No 2 (2022)
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/sylva.v11i2.5413

Abstract

Tanah adalah perubahan mineral dan bahan organik yang dipengaruhi oleh bahan induk, iklim, topografi, waktu, dan vegetasi yang dapat dibedakan dari ciri-ciri bahan induk asalnya secara sifat fisik tanah dan memiliki beberapa jenis tanah seperti jenis tanah Inceptisol adalah tanah Inceptisol. Tanah Inceptisol merupakan salah satu jenis tanah pada lahan kering yang luasnya 2.600.000 ha di Provinsi Riau dan salah satu penggunaan lahan tanah Inceptisol berada di Riau yaitu di kampus Universitas Riau. Penelitian ini bertujuan untuk mengetahui karakterisasi sifat fisika tanah inceptisol pada penggunaan lahan di Kampus Bina Widya Universitas Riau. metode yang digunakan survei dan observasi dengan  Analisis data dilakukan dengan analisis analisis kuantitatif. Hasil penelitian ini menunjukkan bahwa penggunaan lahan Inceptisol di Universitas Riau memberikan pengaruh terhadap perubahan sifat fisik tanah terutama pada penggunaan lahan akasia dan Arboretum memberikan peningkatan terhadap kadar air, C-organik, warna tanah, dan porositas. Selain itu penggunaan lahan rumput, ekaliptus memberikan pengaruh terhadap peningkatan total ruang pori, permeabilitas, laju infiltrasi. Tekstur tanah pada berbagai penggunaan lahan memiliki tekstur tanah yang hampir sama yaitu kandungan fraksi pasir yang lebih tinggi.
Co-Authors Ade Ilham Ade Ilham Adriman, Adriman Agung Anugrah Agung Anugrah Ana Pratiwi Andrian Sianturi Andrian Sianturi Anggun Tri Nande Ardiansyah Ardiansyah Ari Adrian Arida Susilowati Iswanto Budi Helianto Budijono, Budijono Darli, Viny Volcherina Deddy Samuel Defri Yoza Defrizal Defrizal Defry Yoza Deswina Deswina Deswina, Deswina Dicky Zulkarnaen Dolly Kuswara Harahap Dwi Basliana Okta Eka Surya Ahmadi Eko Prianto, Eko Esa Ervina Evi Sribudiani Ewi Irfani Fanny Kusuma Akmal Farib Hamdani Fariz Hidayat Fatmawati, Riska Fiki Rangga Abdi Freddy, Manompang Gilda Pudikasari Gustiara Ningsih harahap, ari azhari Haryati Haryati Haryati Haryati Haryati Hasanah, Hafiz Idwar, Idwar Ika Purnama Ismenni Banjar Nahor, Ismenni Banjar Juliana Kristian Nurdianto, Kristian Manullang, Kristian H Mardianti, Gusdina Masruri, Niskan Walid Metananda, Arya Arismaya Metri, Erwis Mini Silviana Miswadi Miswadi Miswadi Miswadi Miswadi Morina Widya Afifa Morina Widya Afifa Muhammad Fauzi Muhammad Mardhiansyah Mukhamadun Mukhamadun . Munzil Azim Nafiah, M. Ali Ningsih, Gustiara Nur Fitriana Nur Fitriana Nur Suhada, Nur Nurul Qomar Nurul Qomar Pebriandi, Pebriandi Rahmatdillah Rahmatdillah Recsy Poetu Antari Rino Eka Pratama Riyan Sumitran Rofi Julianda Romie Jhonnerie Rostika, Lina Rudianda Sulaeman Rudianda Sulaeman Sabaruddin Sabaruddin Sahab, Ahmad Shirly Indriana Putri Silitonga, Ester Marisi Silviana, Mini Simanjuntak, Chindy A.S Somadona, Sonia Sugi Ari Wardana Supriyan Syahrizal Syahrizal, Supriyan Syukri, Zulhusni Tengku Muhammad Ulul Azmi Tri Wahyudi Muslim Tuti Arlita Ulul Azmi, Tengku Muhammad Vini Volcherina Darlis Viny Volcherina Darli Wahyu Bintoro Wahyu Bintoro, Wahyu Wan Muhammad Yunus, Wan Muhammad Widhiastika, Dhita Widia Safitri Wishnu Sukmantoro Yuni Elfiza