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All Journal Jurnal Sains dan Inovasi Perikanan/Journal of Fishery and Innovation (JSIPi) Omni-Akuatika Indonesian Journal of Tropical Aquatic MADROSATUNA : Jurnal Pendidikan Guru Madrasah Ibtidaiyah Intensive Journal Jurnal Media Akuakultur Indonesia Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Hermawan, David
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media

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EVALUATION FEASIBILITY AND BUSINESS DEVELOPMENT STRATEGY ENLARGEMENT WHITE SHRIMP (LITOPENAEUS VANNAMEI) AT DUKUHTUNGGAL VILLAGE GLAGAH SUB DISTRICT LAMONGAN Lutfi, Ika Maulana; Hermawan, David; Zubaidah, Anis
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Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v1i1.6077

Abstract

This research aims to analyze the financial feasibility and formulating business development strategies enlargement of White shrimp at Dukuhtunggal Village Sub district Glagah Lamongan. The research using survey method. The sampling method used snowball sampling by the number of respondents as many as 18 people. The result showed that the business of enlarging white shrimp enlargement enterprise development deserves to be implemented and developed, because of the results of the assessment in accordance with the investment criteria Net Present Value (NPV) reached Rp 283.927.334, Net Benefit Cost Ratio (Net/B/C) by 28, Internal Rate of Return (IRR) reached 645.5%, the value of payback period  of 0.37 or three months of seven days and the Profitability index (PI) of 1.53. Business development strategy is known through proceeds from the matrix IFE and EFE with a total score of 3.341 and 3.272. Matrix IE shows the position of the company located on the cell to one which means grow and build so that the appropriate strategy to be applied is the intensive strategy i.e., market penetration, market development, product development and integration strategies. The formulation of the strategy produces eight alternative development strategies i.e., an increase in production capacity, strengthening the institutional role, leveraging capital access, empowerment of farmers, increase the use of quality seeds, weaves cooperation with suppliers, maintaining the condition of the infrastructure, and improve the implementation and monitoring of standard operational procedures. Keywords: Litopenaeus vannamei, feasibility, strategy enlargement
ANALYSIS OF GROUPER BUSINESS DEVELOPMENT IN GEROKGAK DISTRICT, BULELENG REGENCY, BALI PROVINCE Hermawan, David; Sutarjo, Ganjar Adhywirawan; Aziz, Abdul
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Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v2i2.11131

Abstract

Fisheries development is a human effort in increasing the utilization of all fishery's biological resources which include the fishery capture, aquaculture, and processing sectors. Grouper is a commodity that has high economic value, but the amount of aquaculture production is still low, one of which is in Gerokgak district. This research was conducted from February to March 2018, in Gerokgak District, Buleleng Regency, Bali Province. Data obtained through interviews, observations, documentation, and questionnaires directly with respondents, namely the Department of Maritime Affairs and Fisheries of Buleleng Regency, business owners, managers, and grouper farmers. The analysis used in this study was to obtain a grouper cultivation strategy using a SWOT analysis. From the results of the calculation of the analysis and determination of the SWOT matrix, thew government must increase grouper aquaculture results by increasing the number of hatchery and enlargement businesses. The government is more responsive to the problems faced by farmers.Keywords: Aquaculture, Development strategy, Fisheries, Grouper, SWOT
Pengaruh pengkayaan Daphnia sp. menggunakan astaxanthin terhadap kualitas warna merah ikan Cupang Halfmoon (Betta splendens, Regan 1910) Prasetyo, Dony; Handajani, Hany; Hermawan, David; Fuhaira, Iqbal
JSIPi (Jurnal Sains dan Inovasi Perikanan) (Journal of Fishery Science and Innovation) Vol 4, No 1 (2020): JURNAL SAINS dan INOVASI PERIKANAN
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jsipi.v4i1.11071

Abstract

Betta splendens adalah salah satu jenis ikan hias yang mempunyai daya tarik dan nilai ekonomis pada kualitas warna yang dimunculkan dari tubuhnya. Tujuan dari penelitian ini adalah untuk mengetahui pemberian pakan hidup yang diperkaya dengan astaxanthin Carophyll© red dapat meningkatkan kualitas warna merah pada ikan cupang halfmoon merah serta untuk mengetahui dosis Carophyll© red yang memberikan nilai optimal bagi warna ikan cupang. Metode penelitian yang digunakan adalah menggunakan metode rancangan acak lengkap (RAL) dengan perlakuan dosis Carophyll© red yang diperkaya melalui Daphnia sp. dengan 5 perlakuan 5 ulangan : 0 g (kontrol); 0,25 g L-1; 0,5 g L-1; 0,75 g L-1 dan 1 g L-1. Ikan yang digunakan adalah ikan cupang halfmoon dengan warna yang seragam. Pengamatan yang dilakukan selama 28 hari meliputi kualitas warna yang dilakukan dengan menggunakan alat color reader, perhitungan jumlah konsumsi Daphnia sp. selama pemeliharaan, pertumbuhan panjang, bobot yang dihasilkan dan kualitas air. Hasil penelitian menunjukkan bahwa peningkatan kualitas warna pada ikan cupang optimal dengan dosis 0,25-0,5 g L-1. Namun peningkatan warna bersifat temporer. Tidak terdapat perbedaan signifikan terhadap pertumbuhan bobot dan panjang mutlak, laju pertumbuhan berat mutlak. Pengkayaan Dapnia sp. dengan Carophyll© red dapat mingkatkan konsumsi pakan dan sintasan ikan Cupang.
Optimation of tempe liquid waste usage for growth performances and feed uptake on Oreochromis niloticus Andriawan, Soni; Hermawan, David; Rahmania, Shafira
Journal Omni-Akuatika Vol 20, No 1 (2024): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2024.20.1.1076

Abstract

Tempe liquid waste (TLW) contains nutrients such as fat, protein, carbohydrates, nitrogen, phosphate, and potassium that could be used in fish rearing. Moreover, it has lactic acid bacteria (LAB) belonging to gram-positive microorganisms, which could decompose organic and inorganic matter in water. Therefore, this study aimed to determine whether TLW could have the potential to enhance Tilapia (Oreochromis niloticus) growth and improve feed efficiency. The study used 180 fish (6.04 ± 0.13 g) reared in twelve aquariums and TLW was obtained from boiling soybeans during the tempe production process in the village of Sanan, Malang. The research design was Completely Randomized Design (CRD), which involved four treatments, T0 (no TLW), T1 (3%), T2 (5%), and T3 (7%) with three replications. The result showed that T2 resulted in the highest growth rate (11.22 ± 0.29 g), specific growth rate (2.07 ± 0.32% / day), feed conversion rate (1.54 ± 0.16), feed efficiency (56.02 ± 1.24%) and survival rate (91.11 ± 0.58%) compared to others. Nonetheless, there was no difference in the absolute length (Lm) parameter at the end of the research. The research results also found that water quality remained favourable for supporting tilapia cultivation under all observed conditions, except for the oxygen levels in the control group, which fell below the standard (<3 mg L-1). Finally, the present study concluded that 5% of TLW could be the best; in contrast, the higher concentration of TLW decreased O. niloticus growth performance, feed efficiency, and survival rate.Keywords: fish development, tilapia, wastewater, water qualities
Rose anthocyanin microencapsulation for improving the color of two strains of koi Andriawan, Soni; Hakim, Riza Rahman; Hermawan, David; Bahiyya, Choridatul; Darmawan, Ari Wahyu; Miranda, Felix; Dahlia, Lisma; Dewantari, Arinta Agnie
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 3 (2025): SEPTEMBER 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.3.46784

Abstract

Koi fish coloration is genetically significant, but environmental factors and color quality can lead to degradation. Some individuals use synthetic dyes to enhance their appearance, which harms the environment. This study explored the effects of microencapsulated Rose sp. flower anthocyanin (MRFA) as a natural alternative dye to enhance the color of Sanke and Kohaku koi fish. Sanke exhibits orange-black hues, while Kohaku shows orange-white hues, allowing for comparative analysis. Before the experiment, MRFA was analyzed using FESEM and XRD to assess the particle size distribution and shape of the anthocyanin microcapsules. A Randomized Complete Design (CRD) with four treatments (T0, 150 mg (T1), 300 mg (T2), and 450 mg (T3)) and five replications were used. Data was analyzed with SPSS. Results showed that MRFA particles were distributed, though not entirely homogeneous (14 m to 170 m), with XRD spectra indicating interactions between maltodextrin and Rose sp. anthocyanin. Results showed that MRFA significantly improved certain color parameters in Sanke, particularly at moderate doses (T1 and T2), but the control group (T0) outperformed MRFA in some cases. In Kohaku, no significant improvement was observed compared to the control, suggesting that MRFA was less effective in enhancing whiteorange pigmentation. Overall, our findings indicate that MRFA supported koi growth but showed limited, strain-specific effects on coloration. Further studies with longer trials and larger populations are needed to confirm its potential as a natural feed additive.Keywords:Herbal extractCyprinus carpioKohakuPigmentSanke
Peningkatan Kemampuan Membaca Intensif Melalui Metode Role Playing dalam Kegiatan Pasar Baca Hermawan, David; Ahmala, Majidatun
MADROSATUNA : Jurnal Pendidikan Guru Madrasah Ibtidaiyah Vol. 8 No. 1 (2025)
Publisher : Latifah Pres

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rendahnya tingkat kemampuan membaca anak kelas 3 MIS Tanjungsari disebabkan oleh banyak faktor diantaranya adalah kurangnya minat anak dalam membaca, sedikitnya jumlah bacaan yang sering dijumpai oleh anak, kurangnya perhatian dari orang tua dan guru terhadap kemampuan membaca anak, ketidakmampuan guru dalam menerapkan metode dan media belajar membaca yang tepat, serta pelaksanaan kegiatan pembelajaran yang masih bersifat monoton dan membosankan bagi siswa. Hal tersebut dapat dilihat dari 21 siswa yang ada hanya 7 siswa saja yang benar-benar sudah pandai dan lancar dalam membaca, sedangkan 14 diantaranya masih belum terlalu pandai dan lancar dalam membaca. Oleh sebab itu, peneliti melaksanakan metode role playing dengan kegiatan pasar baca untuk meningkatkan kemampuan membaca intensif. Metode penelitian yang digunakan adalah metode deskriptif kualitatif. Hasil penelitian menunjukan bahwa dengan metode role playing melalui kegiatan pasar baca ini dapat meningkatkan semangat dan antusias anak dalam belajar membaca, meningkatkan rasa kekeluargaan dan solidaritas antar teman, meningkatkan kemampuan membaca anak, serta dapat meningkatkan kemampuan berpikir anak dalam mengolah dan merangkai huruf maupun kata.
FEEDING DIFFERENT TYPES OF FEED ON VANNAMEI SHRIMP (LITOPENAEUS VANNAMEI) MAINTAINING WITH LOW SALINITY MEDIA Hermawan, David; Scabra, Andre Rachmat; Hariadi
Jurnal Media Akuakultur Indonesia Vol 2 No 1 (2022): Indonesian Journal of Aquaculture Medium
Publisher : Program Studi Budidaya Perairan Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/mediaakuakultur.v2i1.1279

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh pemberian jenis pakan yang berbeda terhadap nilai Laju Pertumbuhan Spesifik (SGR), Rasio Konversi Pakan (FCR), dan Sintasan (SR) udang vannamei (Litopenaenus vannamei) pada pemeliharaan media bersalinitas 2 ppt. Metode penelitian yang digunakan adalah metode eksperimen dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari 3 perlakuan dan masing-masing diulang 4 kali. Perlakuan pertama (P1), kedua (P2), dan ketiga (P3) berturut turut adalah pemeliharaan udang vannamei dengan pemberian pakan jenis pellet, pakan alami jenis cacing sutra (Tubifex tubifex), dan kombinasi antara keduanya. Hasil penelitian menunjukkan bahwa pemberian jenis pakan yang berbeda, memberikan pengaruh yang nyata terhadap nilai Laju Pertumbuhan Spesifik (SGR) udang vannamei. Pemberian pakan kombinasi antara cacing sutra (Tubifex tubifex)dengan pakan pellet, merupakan perlakuan yang terbaik dengan nilai SGR sebesar 6,07% BW/hari. Perlakuan yang diberikan pada penelitian ini tidak memberikan pengaruh yang nyata terhadap nilai FCR dan SR. Hasil pengamatan kualitas air selama penelitian ini meliputi nilai derajat keasaman (pH) yang berkisar antara 6,6 – 6,8, kemudian suhu yang berkisar antara 24,3 -24,5 oC, salinitas yang bernilai homogen, yaitu 2 ppt, dan kandungan oksigen terlarut (DO) yang berkisar antara 6,8 – 7,3 mg/l.
Using Infographics to Help Students Understand Descriptive Texts Better Hermawan, David; Margana, Margana
Intensive Journal Vol 8, No 2 (2025): Intensive Journal October
Publisher : Universitas Islam Kalimantan Muhammad Arsyad Al Banjari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/intensive.v8i2.22146

Abstract

This study aims to (1) examine how the use of infographic media improves the reading comprehension of eighth-grade students in descriptive texts at SMPN 1 Dusun Selatan, and (2) explore the process and behavioral changes that accompany the improvement in students’ reading comprehension after the implementation of infographic media. The study utilized the Classroom Action Research (CAR) method, following the model proposed by Mills (2018), with two observation cycles consisting of planning, implementation, observation, and reflection. Data were collected through pre-test and post-test reading comprehension assessments, interviews, questionnaires, and photographs. The reading comprehension ability was evaluated based on the Kriteria Ketuntasan Minimal (KKM), with the goal of achieving scores above the minimum mastery threshold. Quantitative data were analyzed using statistical methods, while qualitative data were analyzed descriptively and triangulated to ensure validity and reliability. The findings show significant improvements in students' reading comprehension after the use of infographic media. The average post-test score increased by 35%, and the percentage of students meeting the KKM rose from 48% in the pre-test to 84% in the post-test. Additionally, students exhibited positive changes in their behavior, becoming more engaged, active, and confident in their learning. They showed a greater ability to focus on interpreting texts and expressed less anxiety when faced with descriptive texts. This study concludes that infographic media effectively enhances reading comprehension and fosters behavioral changes, such as increased student engagement and confidence, which ultimately improves learning outcomes.
Co-Authors Abdul Aziz Andre Rachmat Scabra Anis Zubaidah Bahiyya, Choridatul Dahlia, Lisma Darmawan, Ari Wahyu Dewantari, Arinta Agnie Dony Prasetyo Fuhaira, Iqbal Ganjar Adhywirawan Sutarjo Hany Handajani Hariadi Lutfi, Ika Maulana Majidatun Ahmala Margana Margana Miranda, Felix Rahmania, Shafira Riza Rahman Hakim Soni Andriawan