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Ichsan Setiawan
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depik@usk.ac.id
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Faculty of Marine and Fisheries Universitas Syiah Kuala Jalan Meureubo No. 1, Kopelma Darussalam Banda Aceh, 23111, Indonesia
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INDONESIA
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
ISSN : 20897790     EISSN : 25026194     DOI : 10.13170/depik
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan is a peer review international journal, this journal is publishing high-quality articles in aquatic sciences and fisheries in general. The aim of the journal is to publish and disseminate the current or new findings of the research, and give a significant contribution to the development of fisheries and aquatic sciences in several topics, but not limited to: Fisheries (Aquaculture, Capture Fisheries, Fish Processing) Aquatic Ecology (Freshwater, Marine, and Brackishwater) Aquatic Biology (Fish, Mollusk, Crustacean, Plankton, Coral reefs) Oceanography
Articles 944 Documents
Kondisi suhu dan salinitas serta korelasinya dengan variabilitas eddy di Perairan Halmahera dan Mindanao Gadza B.T. Suharyo; Noir P Purba; Lintang P.S. Yuliandi; Mega L. Syamsuddin
Depik Vol 9, No 3 (2020): December 2020
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (599.13 KB) | DOI: 10.13170/depik.9.3.15534

Abstract

The purpose of this study was to determine the dynamics of the waters around Halmahera Eddy (HE) and Mindanao Eddy (ME) both horizontally and vertically. The location of the study is in the Pacific Equator Pacific Waters with embedded at 20 - 10oN and 125o-135o E. The data used were temperature and salinity downloaded from Argo Float data centre and combined with surface currents data from MyOcean. The results showed that the two eddies have different impacts on water conditions. In HE, the characteristics are shown by convergent moving mass of water, increasing surface temperature and decreasing salinity. The characteristics of eddy in these waters indicate the existence of downwelling. In ME the mass of water moves divergently, the condition of the sea surface temperature is lower and the salinity level increases. The characteristics of eddy in these waters indicate upwelling.Keywords:EddiesUpwellingIndonesia ThroughflowArgo floatABSTRAKTujuan dari penelitian ini untuk mengetahui dinamika perairan di sekitar Halmahera Eddy (HE) dan Mindanao Eddy (ME) baik secara horizontal dan vertikal. Lokasi kajian berada di Perairan Pasifik Equator Barat dengan koordinat 2o LS – 10o LU dan 125o BT – 135o BT. Data yang digunakan adalah data suhu dan salinitas dari Argo Float dan data arus permukaan dari MyOcean. Hasil penelitian menunjukan bahwa kedua eddy ini memberikan dampak yang berbeda terhadap kondisi perairan. Di HE, karakteristiknya ditunjukkan dengan massa air yang bergerak secara konvergen, meningkatnya suhu di permukaan dan menurunnya kadar salinitas. Karakteristik eddy di perairan ini menunjukkan adanya downwelling. Di ME massa air bergerak secara divergen, kondisi suhu permukaan lautnya lebih rendah dan kadar salinitasnya meningkat. Karakteristik eddy di perairan ini ini menunjukkan adanya upwelling.Kata kunci:EddiesTaikan airArus Lintas IndonesiaArgo float
Uji selektivitas ekstrak etil asetat (EtOAc) biji putat air (Barringtonia racemosa) terhadap keong mas (Pomacea canaliculata) dan ikan lele lokal (Clarias batrachus) Musri Musman; Sofyatuddin Karina; Kavinta Melanie
Depik Vol 1, No 1 (2012): April 2012
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (128.03 KB) | DOI: 10.13170/depik.1.1.23

Abstract

Abstract. This study examined the selectivity of ethyl acetate extract of putat air (Barringtonia racemosa) in controlling Pomacea canaliculata compared to local catfish (Clarias batrachus). Five concentration of putat air (25, 50, 100, 200, and 400 ppm) with triplicate were tested in this study. The powder of putat air kernel was extracted through increasing the polarity of solvent, i.e. dichloromethane, ethyl acetate, and methanol. The mortality data were analyzed using Trimmed Spearman Karber (TSK) program version 1.5. The selectivity value was calculated based on LC50 values obtained from TSK. The results showed that (1) LC50 values of putat air's kernel extract of putat air to P. canaliculata and C. batrachus were 25.00 and 87.06 ppm, respectively, (2) the selectivity value of putat air's kernel extract as molluscicide of P. canaliculata was 3.48. Key words: Pomacea canaliculata, local catfish (Clarias batrachus), putat air (Barringtonia racemosa).
Variabilitas suhu laut pada kejadian IOD (Indian Ocean Dipole) di perairan barat Sumatera menggunakan data Argo Float Hanani Adiwira; Noir P. Purba; Syawaludin A. Harahap; Mega L. Syamsuddin
Depik Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4141.802 KB) | DOI: 10.13170/depik.7.1.8089

Abstract

The objective of the research was to analyze the vertical variability of the water column in the West Sumatra waters. The data used to analyze the vertical variability was the temperature data sets from Argo float instruments which were operated from 2009 to 2011 in the West Sumatran sea region. The secondary data that used was the geostrophic current data sets which obtained from the Jason image satellite also sea temperature anomaly data. The method used in this research is by analyzing temporally and spatially and then describing while comparing the data. The result of the research showed that IOD formed from June to July with the peak of IOD was from September to November and the disintegration starts in December. The SST average on 2009 (Neutral IOD) during peak phase of IOD was 29.060C, in 2010 (Negative IOD) the SST mean is 28.690C, in 2011 (Positive IOD) the SST mean was 28.790C. The result from spatial analyzes showed that the strong IOD was the main reason for the movement of the mixed layer in West Sumatra waters, so the warm water cannot be found around the West Sumatra waters. The upper boundary depth of thermocline during peak phase of 2009’s neutral IOD starts from September was on 82.59 m, in October was 86.12 m and in November was 89.5 m. In Septemeber 2010 the upper thermocline boundary was found on 89.06 m deep, in October was 104.05 m, and in November was 107.36 m, the thermocline got deeper because the input of water masses from West Indian Ocean intensifies because of negative IOD event. In September 2011 the upper thermocline boundary was found on 64.16 m, in October was 75.35 m and in November was 79.88 m. The thermocline found more shallow because the mixed layer on East Indian Ocean moved westward so the thermocline lifted up to fill the water column emptiness.Penelitian ini bertujuan mengkaji variabilitas kolom air secara vertikal di perairan Barat Sumatera. Data yang digunakan yaitu data suhu dari instrumen Argo float yang beroperasi di perairan Barat Sumatera tahun 2009 – 2011. Data pendukung yaitu data arus geostropik yang diperoleh yang diperoleh dari citra Jason selain itu digunakan data suhu anomali laut. Metode yang digunakan adalah analisis temporal dan spasial serta deskriptif komparatif. Hasil penelitian menunjukkan proses pembentukan IOD terjadi pada Juni – Agustus kemudian mencapai puncak pada September – November dan proses peluruhannya pada Desember. Rata – rata SPL pada fase puncak tahun 2009 (IOD netral) yaitu 29.060C; pada 2010 (IOD negatif) yaitu 28.690C; dan pada 2011 (IOD positif) yaitu 28.790C. Berdasarkan analisis spasial IOD dengan intensitas kuat mengakibatkan pergerakan massa air hangat melewati perairan Barat Sumatera sehingga tidak terdeteksi lagi di lokasi ini. Batas atas termoklin pada fase puncak IOD 2009 (September) yaitu 82.59 m; Oktober sekitar 86.12 m dan November mencapai 89.5 m. Selanjutnya pada 2010 yaitu pada September sekitar 89.06 m; Oktober sekitar 104.05 m dan November mencapai 107.36 m. Terlihat, termoklin semakin dalam karena massa air hangat dari Hindia Barat yang mengisi perairan Barat Sumatera menjadi semakin kuat pada fase IOD negatif. Sebaliknya, pada September 2011 termoklin berada pada kedalaman 64.16 m; Oktober pada kedalaman 75.35 m dan November sekitar 79.88 m. Pada periode ini termoklin terdeteksi lebih dangkal karena lapisan mixed layer bergerak ke Hindia Barat dan kekosongannya diisi lapisan termoklin. 
Komposisi kimia kupang merah (Musculista senhausia) segar dan rebus Nurjanah .; Agoes M. Jacoeb; Reza Nurul Ulma; Shinta Puspitasari; Taufik Hidayat
Depik Vol 3, No 3 (2014): Desember 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (287.698 KB) | DOI: 10.13170/depik.3.3.2151

Abstract

The purpose of this study was to determine the yield, chemical compositions, amino acids, minerals, and heavy metal residues (Pb, Hg) of fresh and boiled mussel. Amino acid was analyzed usingHPLC, minerals and heavy metals were examined using AAS and phosphorus by spectrophotometer, fatty acids by GC, and cholesterol by Liebermann-Buchard. The results showed that the chemical composition of water content, ash, protein and lipid of mussels meat were decreased about 6.09%, 2.25%, 1.39%, 0.42%, respectively after boiled while carbohydrate was increased 4.07% and the amino acids were decreased after boiling. The Ca, Mg, K, P, Na, Cu were declined after boiled, while Co, Fe, Mn and Zn were incraseed. In addition, the Pb was decreased after boiled while Hg and Se were not detected in both fresh and boiled mussel meat. SAFA fatty acids was 38.71% (fresh) and 37.31% (boiled), MUFA 8.13% (fresh) and 8.02% (boiled), PUFA 10.31% (fresh) and 8.77% (boiled), and the cholesterol contents were 102.57 mg/100 g of fresh and 100.97mg/100 g for boiled mussel meat.
Distribusi patogen dan kualitas lingkungan pada budidaya perikanan laut di Provinsi Kepulauan Riau Romi Novriadi; Sri Agustatik; Saipul Bahri; Didi Sunantara; Endang Wijayanti
Depik Vol 3, No 1 (2014): April 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (394.433 KB) | DOI: 10.13170/depik.3.1.1357

Abstract

Abstract. Increasing of aquaculture production is playing an important contribution to increase of environmental and pathological problems in several aquaculture production centers. Therefore, prevention and control of diseases are now become a top priority for the sustainability of this industry. The objective of the present study was to evaluate the distribution of fish pathogen in some mariculture production centers in Riau Islands Province. The study was conducted from Febrari 2011 to December 2013. The study showed that Nodavirus and Iridovirus as a viral disease-causing agents were commonly found in marine fish farm. While Vibrio spp., Aeromonas spp. and Edwardsiella spp. were general pathogenic microorganism in marine and freshwater fish farms. Furthermore, there were also found various parasites such as Diplectanum sp., Gyrodactilus sp., Caligus sp., Trichodina sp., Rhexanella sp., Hirudinae sp., Benedenia sp.  and Cylodonela sp. in various marine and freshwater fish production centers in the Riau Islands Province. Keywords: Monitoring; Fish diseases;Parasite; Bacteria; Virus. Abstrak. Peningkatan laju produksi perikanan budidaya secara umum berperan penting dalam peningkatan masalah lingkungan dan patogen di beberapa unit produksi budidaya. Oleh karena itu, pencegahan dan pengendalian penyakit saat ini menjadi prioritas untuk menjamin keberlanjutan industri ini. Penelitian ini bertujuan untuk melakukan monitoring dan menilai distribusi patogen pada beberapa sentra produksi perikanan laut di Provinsi Kepulauan Riau. Monitoing dilakukan mulai Februari 2011 sampai Desember 2013. Hasil penelitian menunjukkan bahwa Nodavirus dan Iridovirus merupakan agen penyebab penyakit virus yang umum ditemukan di budidaya ikan laut. Sementara Vibrio spp., Aeromonas spp. dan Edwardsiella spp. merupakan mikroorganisme patogen yang umum ditemukan di sentra budidaya ikan laut dan ikan air tawar. Hasil kajian monitoring juga menunjukkan bahwa Diplectanum sp., Gyrodactilus sp., Caligus sp., Trichodina sp., Rhexanella sp., Hirudinae sp., Benedenia sp. dan Cylodonela sp. merupakan parasit yang memiliki distribusi tinggi di berbagai sentra produksi ikan air laut dan tawar di Kepulauan Riau.Kata Kunci : Monitoring; penyakit ikan; ; parasit; bakteri; virus; Kepulauan Riau.
Perubahan sebaran dan kerapatan hutan mangrove di Pesisir Pantai Bama, Taman Nasional Baluran menggunakan citra satelit SPOT 4 dan SPOT 6 Andhika Rahmatullah Laksmana Fudloly; Mochammad Arif Zainul Fuad; Anang Dwi Purwanto
Depik Vol 9, No 2 (2020): August 2020
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (853.399 KB) | DOI: 10.13170/depik.9.2.14494

Abstract

The condition of mangrove forests in the Baluran National Park area is always changing. Mapping changes of mangrove area and density is needed to find out areas that need attention for mangrove conservation. The study aimed to determine the distribution and the density of mangrove forests in coastal waters of Bama, Baluran National Park. The image data used were SPOT 4 acquisition in 2007 and SPOT 6 acquisition in 2017 as well as field data that have been collected on 23-25 January 2019. The method of separating mangrove and non-mangrove objects used supervised classification, whereas for estimating the density of mangrove using the Normalized Difference Vegetation Index (NDVI) algorithm. The results showed the distribution of mangrove forests in coastal waters of Bama, Baluran National Park from 2007-2017 decreased in area by 8.9 ha. In contrast, the condition of mangrove density increased significantly, where the changes in mangrove density were dominated in the high-density class. The results of the accuracy tests using the method confusion matrix obtained an overall accuracy of 88%, while the accuracy-test with the kappa method obtained an accuracy of 87.76%. The resulting accuracy value indicates a high level of accuracy (more than 85%) and according to the specified requirements.Keywords: Mangrove, NDVI, SPOT 4, SPOT 6, Baluran National Park ABSTRAKKondisi luasan hutan mangrove di kawasan Taman Nasional Baluran terus mengalami perubahan. Pemetaan perubahan luasan dan kerapatan mangrove sangat diperlukan untuk mengetahui area yang membutuhkan perhatian untuk pelestarian mangrove. Penelitian ini bertujuan untuk mengetahui sebaran dan kerapatan hutan mangrove di  pesisir pantai Bama, Taman Nasional Baluran. Data yang digunakan dalam penelitian adalah citra SPOT 4 akuisisi tahun 2007 dan citra SPOT 6 akuisisi tahun 2017 dan data hasil survei lapangan yang telah dilakukan pada tanggal 23 - 25 Januari 2019. Metode pemisahan obyek mangrove dan non mangrove menggunakan klasifikasi terbimbing (supervised), sedangkan untuk pendugaan tingkat kerapatan mangrove menggunakan algoritma Normalized Difference Vegetation Index (NDVI). Hasil penelitian menunjukkan sebaran hutan mangrove di pesisir pantai Bama, Taman Nasional Baluran dari tahun 2007-2017 mengalami penurunan luasan sebesar 8,9 ha, sedangkan kondisi tingkat kerapatan mangrove mengalami peningkatan yang cukup signifikan dimana perubahan kerapatan mangrove didominasi pada kelas kerapatan rapat. Hasil uji akurasi menggunakan metode matriks kesalahan (confusion matrix) memperoleh overall accuracy sebesar 88%, sedangkan uji akurasi dengan metode kappa diperoleh tingkat akurasi sebesar 87,76%. Nilai akurasi yang dihasilkan menunjukkan tingkat ketelitian yang cukup tinggi (lebih dari 85%) dan telah memenuhi syarat yang ditetapkan.Kata kunci: Mangrove, NDVI, SPOT 4, SPOT 6, Taman Nasional Baluran
Analisis kesesuaian dan daya dukung lingkungan untuk pengembangan wisata bahari di Pulau Bawean Kabupaten Gresik Provinsi Jaya Timur Sukandar Sukandar; Citra S. U. Dewi; Muliawati Handayani
Depik Vol 6, No 3 (2017): December 2017
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.161 KB) | DOI: 10.13170/depik.6.3.7024

Abstract

Bawean Island has potency as a ecotourism destination in Gresik District, Province of Jaya timur. This island is one of the popular destination for local tourist, and the visitors are increasing over the years; but there was no study on the suitability and carrying capacity of the island for marine ecotourism activities. The purpose of this study was to analysis the suitability and carrying capacity of Bawean Island for marine tourism. The Results of the analysis showed that the area of marine ocotourism in Bawean is Suitable (S1) for marine ecotourism development with a value for leisure travel 88.33%, snorkeling activity was 84.21%; and diving 81.48%. The total value carrying capacity of region was 398 persons/day.Pulau Bawean memiliki potensi sebagai daerah tujuan wisata bahari di kabupaten Gresikproins Jaya timur. Pulau ini telah menjadi tujuan wisata lokal bagi masyarakat Jaya timur dan jumlah kunjungan wisatawan semakin meningkat dari tahun ke tahun. Namu belum ada kajian mengenai kesesuaian dan daya dukung lingkungan di Pulau Bawean sebagai kawsan wisata bahari. Oleh karena itu penelitian ini bertujuan untuk mengkaji kesesuaian dan daya dukung Pulau Bawean sebagai kawasan wisata bahari. Hasil analisis menunjukkan bahwa Pulau Bawean sesuai (S1) untuk dikembangkan sebagai kawasan wisata bahari  dengan nilai untuk wisata rekreasi pantai sebesar 88,33%, wisata snorkeling sebesar 84,21% dan wisata selam sebesar 81,48%. Nilai total daya dukung kawasan sebesar 398 orang/hari.
Relationship of ENSO (El Niño – Southernoscillation ) and monsoon index on variability of rainfall and sea surface height in coastal City Semarang, Central Java Rosyidah Rosyidah; Kunarso Kunarso; Elis Indrayanti
Depik Vol 11, No 3 (2022): DECEMBER 2022
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (734.557 KB) | DOI: 10.13170/depik.11.3.26699

Abstract

The city of Semarang is one of the coastal areas in Indonesia that is prone to flooding. Flood events that often occur in the Semarang City area can be triggered by high rainfall. Variations in rainfall and sea level are closely related to global atmospheric circulation such as ENSO and regional atmospheric circulation, Monsoon. This study aims to examine the relationship between ENSO and Monsoon with the distribution of rainfall and sea level in coastal city Semarang from 2012 to 2021. Correlation and composite analysis were used to analyze the relationship and impact of ENSO and Monsoon phenomena on rainfall and sea level. The results showed the strong correlation of the ENSO index (Southern Oscillation Index) to rainfall in the JJA and SON periods. Generally, El Niño (La Niña) has an impact on increasing (decreasing) rainfall. Meanwhile, Australian Summer Monsoon Index (AUSMI) only strongly correlates with rainfall in the SON period. The westerly (eastern) wind indicated by a positive (negative) monsoon index in the SON period has the effect of increasing (reducing) rainfall. The ENSO phenomenon with sea level during the JJA period has a strong relationship. In JJA, the highest sea level (maximum tide) rises by 12.6 cm during El Niño and decreases by 0.6 cm during La Niña. Meanwhile, the lowest sea level (minimum low tide) decreased by 16.6 cm during El Niño and increased by 0.7 cm during La Niña. These results can explain the influence of global and regional atmospheric circulation on a local scale on the coast of Semarang City.Keywords:RainfallSea levelEl NiñoLa NiñaMonsoon
Keragaman fitoplankton di perairan estuaria Kuala Gigieng Kabupaten Aceh Besar, Provinsi Aceh Fahni Sarinda; Irma Dewiyanti
Depik Vol 2, No 1 (2013): April 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (533.466 KB) | DOI: 10.13170/depik.2.1.581

Abstract

Abstract. The objective of the present study was to evaluate diversity of phytoplankton as bioindicator water quality viewed from abundance, diversity index, evenness index, and saphrobic coefficient in Kuala Gigieng, Aceh Besar District, Aceh Province. Sampling was conducted on December 2011 to January 2012. This study applied purposive sampling method. The research obtained 4 families consisted of Crysopyceae (42 genera), Chlorophyceae (8 genera), Cyanophyceae (14 genera) and Euglenophyceae (4 genera). The highest abundance of phytoplankton was 1,362.89 ind/l at high tide on station 3 and the lowest was at low tide on station 1 (809,835 ind/l). The diversity index (H’) was ranged from 3.14 to 4.75, the evenness index (E) was ranged from 0.49 to 0.74, and saprobic coefficient was ranged from 0.331to 0.887. Based on saprobic coefficient, pollution level and water quality was categorized light to moderate level. Furthermore, phase of saprobic were     β-mesosaprobik, β-meso/Oligosaprobik dan β/α-mesosaprobik.Key words : phytoplankton, abundance, diversity index, saprobic coefficient.
Ratio of coral reefs to macroalgae: An ecosystem approach management Aditiyawan Ahmad; Achmad Fahrudin; Mennofatria Boer; Yusli Wardiatno; Mohammad Mukhlis Kamal
Depik Vol 8, No 2 (2019): August 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (708.161 KB) | DOI: 10.13170/depik.8.2.13422

Abstract

Abstract. The decline in the quality of coral reef ecosystems is not only caused by human activities but also caused by competition in ecosystems, including competition for space and nutrients. Research on the comparison of coral reefs with macroalgae is one of the determinants of coral reef health which is the basis for the management of coral reefs with an ecosystem approach. The purpose of this study was to analyze the comparison of coral reef cover with macroalgae. The research method used is Line Intercept Transect (LIT), the research location is 13 stations divided into 3 locations, namely north, centre, and south from Ternate Island in North Maluku. The results showed that the condition of coral reefs ranged from 24 – 86.60%, based on the condition categories of 13 observation locations, the coral reefs of Ternate Island were in very good condition at 15.38%, good conditions at 46.16%, adequate conditions at 30.77%, and damaged conditions 7.69%, while the condition of macroalgae cover ranged from 0 - 30.60% in the area of coral reef ecosystems. The ratio of the of coral reefs to algae ranges from 0 to 1.117, based on the ratio value, it is classified as low, medium to high, spread in the coral reef ecosystem of Ternate Island. Coral reef management strategies on Ternate Island include a continuous monitoring program for coral reef ecosystems, education on coral reef ecosystems, creating a conscious community of waste, and limiting the capture and restoking of herbivorous fish in coral reef areas.Keywords: Coral reef, ecosystem approach management, macroalgae, Ternate Island

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