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All Journal Jurnal Dedikasi Omni-Akuatika Acta Aquatica: Aquatic Sciences Journal Indonesian Journal of Tropical Aquatic Edusiana : Jurnal Manajemen dan Pendidikan Islam Jurnal Media Akuakultur Indonesia Journal of Fisheries & Marine
David Hermawan
University Of Muhammadiyah Malang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Public Health Other

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Community Empowerment Through Probiotic Production and Fish Feed Production Based on Local Materials in Gapoktan Mekar Mulyo, Sukun District, Malang City Ganjar Adhywirwan Sutarjo; David Hermawan; Rahmad Pulung Sudibyo
Jurnal Dedikasi Vol. 17 No. 2 (2020): November
Publisher : Direktorat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/dedikasi.v17i2.14699

Abstract

Increasing the local materials' utilization through community participation in freshwater fish farming is one of the keys to realizing family-based food independence. It can be done by utilizing narrow land, utilizing local raw materials that can be used as ingredients for handmade fish feed, preventing pests and diseases, and improving the aquatic environment's quality. Those steps need to get the attention of various parties through an appropriate technology approach. One of the areas for developing freshwater fish farming in Malang is the Sukun sub-district. The fish farmer group association called "Gapoktan" in the sukun sub-district that carries out fisheries activities is the "Mekar mulyo" Gapoktan. Gapoktan Mekar Mulyo was formed in 2014 with the chairman, Mr. Rahmad, located in Gadang village, Sukun sub-district. There are four groups: one mina weling fish cultivator group, two farmer groups, namely blossom sari, advanced farmers, and one mulyo farmer group. The number of group members is 55 people. Internal community service activities for Gapoktan "Mekar Mulyo" fish farmers in Gadang village, Sukun District, Malang City aim to increase knowledge and skills on the application of acceptable fish farming methods (CBIB), to improve partners' skills in producing fish feed based on indigenous raw materials, and to increase the skills and knowledge of partners in environmental management based on herbal plants. The methods used in the fisheries team's internal community service program where training and mentoring on acceptable fish farming methods (CBIB), independent fish feed production, and probiotic propagation based on local raw materials. The internal community service activities results are as follows: partners can implement an intensive cultivation system in freshwater fish cultivation activities based on acceptable fish farming practices (CBIB). The program partners have succeeded in producing independent fish feed in fermentation, increasing probiotics manufactured from local raw materials, and partners can implement sustainable water quality monitoring. This evaluation is in line with the increase in fish production data during the activity.
Study of Proportions Seaweed Eucheuma cottonii L. and Cooking Time on Quality of Functional of Seaweed Dodol David Hermawan; Warkoyo Warkoyo; Claudia Jasmine; Okta Pringga Pakpahan
Journal Omni-Akuatika Omni-Akuatika Special Issue 2nd Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (235.825 KB) | DOI: 10.20884/1.oa.2018.14.2.540

Abstract

Seaweed as a source of nutrition contains carbohydrates, protein, lipid and ash. Ones of ingredients that works for healthy were dietary fiber. Eucheuma cottonii seaweed contains carrageenan, which can act as a stabilizer, a material thickening, gelling agent, and emulsifiers. This research is aim to know the level of resilience Dodol with the proportion of seaweed and cooking time. The study was conducted using a randomized block design consisting of two factors. The first factor is proportions seaweed thickener composition, glutinous rice flour, rice flour (30:35:30, 40:25:20, 50:15:10), the second factor is cooking time (20, 30, 40 minutes) repeated three times. The observations parameter includes moisture content, ash content, protein, lipid, crude fiber, and texture.The research results showed that has interaction between the proportion of seaweed and cooking time. The proportion of seaweed and cooking time gives effect to the moisture content and the texture of dodol seaweed. The proportions give effect to the moisture content, ash, lipid, crude fibre, and texture while treatment cooking time gives effect to the moisture content, ash, protein, lipid, and texture of dodol seaweed. The best treatment is produced by treatment of 50 g of seaweed: 15 g of glutinous rice: 10 g of rice flour and 40 minutes cooking time with the result 62.10% moisture content, 3.32% ash content, 2.42% protein, 3.25% lipid, 5.20% crude fibre, 76.70 N texture. 
PEMBERIAN JENIS PAKAN YANG BERBEDA PADA PEMELIHARAAN UDANG VANNAMEI (LITOPENAEUS VANNAMEI) DENGAN MEDIA BERSALINITAS RENDAH Andre Rachmat Scabra; David Hermawan; Hariadi Hariadi
Jurnal Media Akuakultur Indonesia Vol 2 No 1 (2022): Jurnal Media Akuakultur Indonesia
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.
EVALUATION FEASIBILITY AND BUSINESS DEVELOPMENT STRATEGY ENLARGEMENT WHITE SHRIMP (Litopenaeus Vannamei) AT DUKUHTUNGGAL VILLAGE GLAGAH SUB DISTRICT LAMONGAN Ika Maulana Lutfi; David Hermawan; Anis Zubaidah
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 1 No. 1 (2018): August
Publisher : Universitas 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 David Hermawan; Ganjar Adhywirawan Sutarjo; Abdul Aziz
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 2 No. 2 (2019): August
Publisher : Universitas 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 conductedfrom February to March 2018, in Gerokgak District, Buleleng Regency,Bali Province. Dataobtainedthrough 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 toobtaina grouper cultivation strategy using a SWOT analysis. From the results of the calculation of the analysis and determination of the SWOT matrix,thewgovernment 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.
The effect of AB Mix nutrition on growth performance of catfish (Clarias gariepinus) and lettuce (Lactuca sativa) cultivated in aquaponic systems Rogerio Lainus Tilman Sarmento; Riza Rahman Hakim; David Hermawan
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 3 No. 2 (2020): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v3i2.12923

Abstract

Catfish farming is growing rapidly because the cultivation and marketing technology is relatively easy for the community to master, and the required business capital is relatively small. Pond water waste originating from fish metabolism and dissolved food waste is toxic to fish. One of the efforts that can be done is fish farming that is integrated with plants through an aquaponics system. Research to determine the effect of AB Mix addition on the growth of African catfish and lettuce cultivated by the aquaponics system. The research method used was an experimental method with a completely randomized design (CRD) consisting of three treatments and three replications. The addition of AB mixed nutrition did not differ in the growing significance of catfish and lettuce. However, the increase in growth occurred with an increasing dosage of AB mix with the best treatment with AB Mix 3 mL L-1. This treatment resulted in absolute growth in fish of 20.52 g and 4.62 g of watercress. The use of a dosage of AB mix higher than 3 mL L-1 may result in better growth.
Analysis of purse seine fisheries business feasibility in coastal fishing port Pondok Dadap, Sendang Biru, East Java, Indonesia Imam Nurul Firdaus; Dony Prasetyo; Ganjar Adhywirawan Sutarjo; David Hermawan
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 3 No. 1 (2020): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v3i1.13316

Abstract

A purse seine is a fishing tool made of nets which are operated by circling the hordes of fish to a bowl-shaped tool at the end of the fishing process and is commonly used to catch pelagic fish by fishermen at UPT PPP Pondokdadap. The purpose of this study was to determine the technical aspects and income of the purse seine vessels in Sendang Biru village and to analyze the feasibility of the purse seine fishery business in the Sendang Biru village. This research was conducted from May to June 2019 at UPT PPP Pondokdadap, Sendang Biru, Malang Regency. The research sample was taken by purposive sampling. Data analysis using descriptive analysis and business financial analysis. The results of the calculation of the business analysis and investment on the purse seine ship found a profit of IDR 1,394,798,872, R/C of 43, PP of 13 months, ROI of 92, NPV of IDR 90,337,780,072, IRR of 633.8 %, and Net B/C is 61. The results show that the purse seine fishery business meets the requirements and is still feasible to be implemented.
Effect of different types of feed (squid, sea worms, and trash fish) to gonad maternity and fundamental levels of Galah shrimp (Macrobrachium Rosenbergii) Ganjar Adhywirawan Sutarjo; David Hermawan; Alvi Zahrotun Nisa
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 4 No. 1 (2021): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v4i1.15850

Abstract

Giant prawns (Macrobrachium rosenbergii) need enough nutrients for the reproductive process. One way to give feed which contains high enough protein. Complete nutritional content, especially protein, can be found in natural food. The type of natural feed used for main feeds including squid, sea worms, trash fish. Complete nutrient content can affect the rate of gonadal development and fecundity. (Squid, sea worms, trash fish) on the level of gonadal maturity and density of broodstock parents (Macrobrachium rosenbergii). This research was conducted by a completely randomized design (CRD) trial design. This study used 4 replications of different types of feeding. The types of feed given are squid, sea worms, trash fish, and pellets at a dose of 5% from biomass/day. The parameters of observation include observation of the level of gonad resistance, fundamentality of broodstock parent, and measurement of water quality (temperature, pH, and dissolved oxygen). The results showed that the administration of different types of feed (sea worms, trash fish) had a very significant effect on the level of maturity and had a significant effect on the probability of prawns (M. rosenbergii). After analysis of variance, the results of F Calculations are greater than F Table 0.05 and F Table 0.01. The smallest significant difference test (LSD) was obtained in P1 (Squid feed) with the Gonad maturity rate ± 5- 6 days as much as 83 % parent and fecundity average results of 28,846 ± 4,925.3 thousand / 45 g.
The addition of Daphnia magna and Ascorbic Acid to Angelfish Feed to Improve Its Growth and Immune Response (Pterophyllum scalare) Titan Aji Wiratama; Dessy Amitha Kusumaningdyah; Anis Zubaidah; David Hermawan; Hany Handajani
Jurnal Ilmiah Perikanan dan Kelautan Vol. 13 No. 1 (2021): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v13i1.19312

Abstract

HighlightThe growth of angelfish which supplemented D. magna enriched ascorbic   acid was identified and analyzedThe survival rate of angelfish after challenge test using A. hydrophylla was identified and analyzedThe composition of ascorbic acid in D. magna was analysed using iodometry titration test D. magna that has been added ascorbic acid was analyzedAbstractAngelfish (Pterophyllum scalare) is a tropical ornamental fish in freshwater with considerable potential in the global market and promising cultivation. However, it has a slow growth. The purpose of this research was to find the impact of giving feeding variations, namely D. magna that enriched ascorbic acid on improving the angelfish growth and its immune response. The research method used was Completely Randomized Design (CRD) using four treatments and three replications. The dosage of ascorbic acid consisted of 0 mg/L, 50 mg/L, 100 mg/L, and 150 mg/L. The fish was fed twice a day and applied with ad libitum. The result showed the addition of ascorbic acid had impacted its growth, and it produced SGR 2.393±0.003 %/day and challenge tests. The Survival Rate (SR) after challenge test was 79.99±1.000 %. In conclusion, the highest amount of growth and survival was treatment D (150 mg/L). 
Growth performance of eel fish (Anguilla bicolor) which are maintained in containers of different colors Hany Handajani; David Hermawan; Andrea Sherina Jasmine
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica, Vol. 11: No. 2 (August, 2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v11i2.15205

Abstract

Performance of Eel (Anguilla bicolor) maintened in containers of different colors. Growth is the main driver in increasing the profitability of aquaculture. In addition to maintenance management the color of the container is also a factor supporting the growth of eels. This study aims to determine the effect of the color of different rearing containers on the growth and appetite response of eel. The test fish used were elver stage eels with an average weight (129 ±131g). The method used is an experiment with two treatments they are grey and green. The test fish were placed in a container measuring 19x4 m2 and a water level of 1m with a stocking density of 1100 individuals each, 30 days of rearing. The variables observed were growth performance including SR (Survival Rate), ADG (Average Daily Growth), FCR (Food Conversion Ratio), SGR (Specific Growth Rate). The results obtained indicated that there was a significant difference in the average growth of fish reared in grey and green containers. Grey container treatment was proven to get higher yields with average final weight values (192.4 ± 4.5 g), FCR (1.01 ± 0.02), ADG (2.01g/day ± 0.06), SGR (1 .25%BW/day±0.02). Based on the results of the study it can be concluded that there is a significant difference in the growth of eels reared in ash and green containers. The color of the ash container proved to be better in supporting growth performance.Keywords: Elver; Green; Grey; Nocturnal
Co-Authors Abdul Aziz Achmad Baihaqi Alvi Zahrotun Nisa Amaliya Mufarroha Andre Rachmat Scabra Andrea Sherina Jasmine Anis Zubaidah Claudia Jasmine Dessy Amitha Kusumaningdyah Dony Prasetyo Ganjar Adhywirawan Sutarjo Ganjar Adhywirwan Sutarjo Hany Handajani Hariadi Hariadi Ika Maulana Lutfi Imam Nurul Firdaus Okta Pringga Pakpahan Rahmad Pulung Sudibyo Riza Rahman Hakim Rogerio Lainus Tilman Sarmento Titan Aji Wiratama Warkoyo .