Article Per Year (5 Year)
p-Index From 2019 - 2024
2.282
P-Index
This Author published in this journals
All Journal Management of Aquatic Resources Journal (Maquares) Journal of Aquaculture Management and Technology Omni-Akuatika Sains Akuakultur Tropis : Indonesian Journal of Tropical Aquaculture Jurnal Litbang: Media Informasi Penelitian, Pengembangan dan IPTEK Scripta Biologica
Dicky Harwanto
Department Of Aquaculture, Faculty Of Fisheries And Marine Science, Universitas Diponegoro. Jl. Prof. H. Soedarto, S.H., Tembalang, Semarang 50275, Central Java, Indonesia. Tel.: +62-24-7474698, Fax.: +62-24-7474698
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Education Environmental Science Other

Published : 17 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 17 Documents
Search

 1   2 
KARAKTERISTIK PERTUMBUHAN CUMI KUPING (Euprymna morsei, Verrill) YANG DIDARATKAN DI PPI TAMBAKLOROK, SEMARANG Wahyuningrum, Martha; Afiati, Norma; Harwanto, Dicky
Management of Aquatic Resources Journal (MAQUARES) Volume 3, Nomor 1, Tahun 2014
Publisher : Departemen Sumberdaya Akuatik,Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (410.362 KB)

Abstract

 Euprymna morsei masuk dalam famili sepiolidae. Jenis ini tidak memiliki cangkang dalam atau yang biasa disebut dengan gladius seperti pada jenis cumi-cumi lain pada umumnya. E. morsei hidup di daerah benthopelagic, biasanya banyak ditemukan di perairan pantai yang memiliki dasar berpasir. Spesies ini banyak dijumpai di perairan Indonesia, Malaysia, Filipina dan tersebar di seluruh Jepang. Penelitian ini bertujuan untuk mengetahui karakteristik morfometri E. morsei, hubungan panjang berat dan pertumbuhan allometrik pada E. morsei. Penelitian ini dilaksanakan pada bulan Desember 2012 – Februari 2013 di PPI Tambaklorok, Semarang, Jawa Tengah yang dilanjutkan dengan identifikasi dan pengukuran di Laboratorium Hidrobiologi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Tembalang, Semarang. Metode pengambilan sampel yang digunakan dalam penelitian ini adalah sistematik random sampling, yaitu penarikan sampel secara sistematik (pengambilan sampel pada tempat dan selang waktu yang sama) pada suatu populasi yang homogen. Variabel yang diukur dalam penelitian ini adalah Panjang Mantel (PM), Panjang Mata (PM), Tinggi Mata (TMt), Panjang Kepala (P), Panjang Lengan (PL), Panjang Tentakel (PT), Panjang Sirip (PS), Lebar Sirip (LS), Lebar Badan (LB), dan Berat Basah (Bb). Nilai hubungan panjang berat E. morsei mempunyai persamaan W = 0,00285L2,416 dengan nilai slope (b) adalah sebesar 2,416. Nilai slope (b) tersebut menunjukkan bahwa pertumbuhan E. morsei bersifat allometrik negatif. Nilai faktor kondisi pada penelitian ini adalah sebesar 1,019, kisaran faktor kondisi tersebut menunjukkan bahwa jenis ini memiliki bentuk tubuh yang agak gemuk.
PENGARUH PENAMBAHAN SUMBER KARBON ORGANIK BERBEDA TERHADAP PERTUMBUHAN DAN RASIO KONVERSI PAKAN BENIH LELE “(Clarias sp.)” DALAM MEDIA BIOFLOK Aji, Sigit Bayu; Sudaryono, Agung; Harwanto, Dicky
Journal of Aquaculture Management and Technology Volume 3, Nomor 4, Tahun 2014
Publisher : Journal of Aquaculture Management and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.521 KB)

Abstract

Intensifikasi budidaya lele dapat memberikan dampak negatif bagi kesehatan lingkungan. Teknologi bioflok merupakan salah satu pemecah masalah lingkungan dan dapat meningkatkan produksi budidaya. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan sumber karbon berbeda terhadap pertumbuhan dan rasio konversi pakan lele. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 3 perlakuan dan 3 ulangan. Perlakuan yang diujikan adalah penambahan sumber karbon berbeda dalam media bioflok A (molase), B (tapioka), dan C (gandum). Hewan uji menggunakan benih lele dengan bobot rata-rata individu sebesar 7,16±0,36 g. Lele dipelihara pada ember berdiameter 60 cm dengan volume 10 liter selama 42 hari dan pemberian pakan 4% dari berat biomassa. Hasil penelitian  menunjukan bahwa  penambahan sumber karbon organik dalam media bioflok tidak berpengaruh nyata (P<0,05) terhadap pertumbuhan mutlak, laju pertumbuhan spesifik, kelulushidupan, rasio konversi pakan dan total konsumsi pakan  lele. Nilai pertumbuhan mutlak yang dicapai pada perlakuan A, B, dan C berturut-turut adalah 10,09±0,06 g; 10,85±0,76 g dan 10,31±0,19 g.  Nilai laju pertumbuhan spesifik yang dicapai adalah (A) 2,21±0,02 %/hari; (B) 2,31±0,16 %/hari; dan (C) 2,23±0,16 %/hari. Nilai kelulushidupan lele (A) 96,67±5,77 %; (B) 96,67±5,77 % dan (C) 86,67±5,77 %. Nilai FCR (A) 1,16±0,03; (B) 1,07±0,10; dan (C) 1,12±0,05 g. Dan total konsumsi pakan sebesar (A) 11,72±0,24 g; (B) 11,57±0,50 g dan (C)  11,51±0,24 g. Penelitian ini membuktikan Penambahan sumber karbon organik berbeda tidak memberikan pengaruh nyata (P>0,05) terhadap laju pertumbuhan spesifik harian, kelulushidupan, rasio konversi pakan dan tingkat konsumsi pakan dalam media bioflok. Ketiga sumber karbon organik yang berbeda (molase, tapioka dan gandum) semua memberikan hasil yang sama. Intensification of catfish farming can adversely affect the health of the environment. Bioflok technology is one environmental problem solvers and can improve aquaculture production. This study aims to determine the effect of different carbon sources on catfish feed efficiency and growth.This study used a completely randomized design (CRD) with 3 treatments and 3 replications. The treatment being tested is the addition of different carbon sources in the media bioflok A (molasses), B (tapioca), and C (wheat). Animal trials using seed catfish with an average individual weight of 7.16 ± 0.36 g. Catfish maintained at 60 cm diameter bucket with a volume of 10 liters for 42 days and feeding 4% of the weight of the biomass. The results showed that the addition of an organic carbon source in the medium bioflok no significant effect (P < 0.05) to the absolute growth , specific growth rate , survival rate , feed conversion ratio and total feed consumption of catfish . Absolute value of the growth achieved in treatment A , B , and C , respectively, 10.09 ± 0.06 g ; 10.85 ± 0.76 g and 10.31 ± 0.19 g . Value of the specific growth rate achieved was ( A ) 2.21 ± 0.02 % / day ; ( B ) 2.31 ± 0.16 % / day ; and ( C ) 2.23 ± 0.16 % / day . Catfish survival value ( A ) 96.67 ± 5.77 % ; (B) 96.67 ± 5.77 % , and (C) 86.67 ± 5.77 %  Food Conversion Ratio Value (A) 1,16±0,03; (B) 1,07±0,10; dan (C) 1,12±0,05 g. And total feed consumption of (A) 11.72 ± 0.24 g; ( B ) 11.57 ± 0.50 g and ( C ) 11.51 ± 0.24 g . This study proves The addition of organic carbon sources did not differ significant effect ( P > 0.05) on daily specific growth rate , survival rate , feed conversion ratio and feed intake level in bioflok media . These three different sources of organic carbon (molasses ,tapioca and wheat) all gave similar results.
PENGARUH C/N RATIO BERBEDA TERHADAP EFESIENSI PEMANFAATAN PAKAN DAN PERTUMBUHAN UDANG WINDU(Penaeusmonodon) PADA MEDIA BIOFLOK Hidayat, Riyan; Sudaryono, Agung; Harwanto, Dicky
Journal of Aquaculture Management and Technology Volume 3, Nomor 4, Tahun 2014
Publisher : Journal of Aquaculture Management and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (146.704 KB)

Abstract

Udang merupakan salah satu komoditas yang di andalkan dalam peningkatan devisa negara dari sektor non migas. Udang mampu berkembang dengan pesat bila dibudidayakan secara baik, terpenuhi segala kebutuhan hidupnya dan tidak ada gangguan lingkungan. Pakan merupakan komponen budidaya yang menyerap biaya paling besar sampai 80%. Teknologi bioflok merupakan salah satu alternatif penyediaan pakan tambahan berprotein untuk kultivan sehingga dapat meningkatkan pertumbuhan dan efisiensi pakan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penggunaan sistem bioflok dengan sumber C/N yang berbeda terhadap efisiensi pakan dan pertumbuhan udang windu dan mengetahui ratio C/N yang menghasilkan efisiensi pakan dan pertumbuhan udang windu yang terbaik. Parameter variable bebas yang dikaji meliputi pertumbuhan mutlak, laju pertumbuhan spesifik (SGR), tingkat konsumsi pakan (TKP), efesiensi pemanfaatan pakan (EPP) dan kelulushidupan (SR). Rancangan percobaan penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 3 perlakuan dan 3 ulangan, yaitu perlakuan A (C/N ratio 12), perlakuan B (C/N ratio 18), dan perlakuan C (C/N ratio 24). Hasil penelitian menunjukkan bahwa jumlah karbon yang berbeda memberikan pengaruh yang sangat nyata (P<0,01) terhadap laju pertumbuhan harian dan efesiensi pemanfaatan pakan dan tidak berpengaruh nyata (P>0,05) terhadap kelulushidupan (SR). Ratio C/N yang memberikan efisiensi pemanfaatan pakan dan pertumbuhan terbaik adalah 24, dengan nilai SGR 1,08±0,079%; EPP 72,32±6,17g; TKP 39,27±1,58; SR 90,00±10,00 dan kualitas air masih dalam kisaran layak untuk kehidupan udang windu (Penaeus monodon). Shrimp is one commodity in the count in an increase in national income of the non-oil sector. Shrimp able to thrive if cultivated properly, meet all the needs of life and no environmental interference. Feed an cultivating components that absorb the greatest costs up to 80%. Bioflok technology is an alternative to the provision of additional food protein kultivan so as to improve growth and feed effeciency. The purpose of this study was to determine the effect of the use of the system with the source bioflok C/N is different to the feed effeciency and growth of balck tiger shrimp and determine the ratio C/N which produces feed effeciency and growth of tiger shrimp are best. Free variabel parameters studied include the absolute growth, specific growth rate (SGR), the level of feed intake (TKP),  effeciency of feed utilization (EPP), survival rate (SR). Parameters of this study supports using a completely randomized design (RAL) with 3 treatments and 3 replications, namely treatment A (C/N ratio 12), treatment B (C/N ratio 18), and treatment C (C/N ratio 24). The results showed that the number of different carbon gives significant influence (P<0,01) the daily growth rate and  effeciency of feed utilization and not significant effect (P>0,05) to survival rate (SR). Ratio C/N which gives the best growth and feed effeciency was 24, with a value of  SGR 1,08±0,079%; EPP 72,32±6,17g; TKP 39,27±1,58; SR 90,00±10,00 and the water quality is still within the range for a decent life tiger shrimp (Penaeus monodon).
EFEK PERGANTIAN AIR DENGAN PERSENTASE BERBEDA TERHADAP KELULUSHIDUPAN, EFISIENSI PEMANFAATAN PAKAN DAN PERTUMBUHAN BENIH MONOSEX IKAN NILA (Oreochromis niloticus) Istiqomah, Dian Annisa; Suminto, -; Harwanto, Dicky
Journal of Aquaculture Management and Technology Volume 7, Nomor 1, Tahun 2018
Publisher : Journal of Aquaculture Management and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (472.577 KB)

Abstract

Ikan nila (O. niloticus) merupakan salah satu komoditas ikan air tawar yang mendapat perhatian besar bagi usaha budidaya perikanan terutama dalam usaha peningkatan gizi masyarakat di Indonesia. Peningkatkan produksi ikan diantaranya melakukan manajemen pakan, padat penebaran yang optimal dan manajemen kualitas air. Penelitian ini bertujuan untuk mengetahui  jumlah pergantian air media yang terbaik dan mengetahui pengaruh pergantian air pada media sebanyak 0, 50, 100, dan 150%/hari terhadap kelulushidupan, efisiensi pemanfaatan pakan, protein efisiensi rasio dan pertumbuhan relatif  pada  ikan nila. Metode pada penelitian ini adalah eksperimental dengan rancangan rancangan acak lengkap 4 perlakuan 3 ulangan. Perlakuan yang diberikan adalah A (0%), B (50%), C (100%), dan D (150%) per hari dengan pergantian air terus - menerus. Materi yang digunakan yaitu ikan nila yang diberikan wadah ember padat tebar 1 ekor per liter. Pemberian pakan dilakukan 2 kali sehari yaitu pagi dan sore, diberikan secara at satiation. Parameter data kualitas air yang diukur meliputi DO, pH, suhu dan amonia. Berdasarkan hasil penelitian yang dilakukan, pergantian air yang baik pada pemeliharaan benih ikan nila dicapai pada 50, 100,150% /hari dengan nilai RGR (7.68±0.72), (7.95±0.89), (7.84±0.44), PER (0.94±0.04), (0.97±0.05), (096±0.06) EPP (38.39±1.47), (39.43±2.27), (38.82±2.42) SR (66.67±7.64), (70.00±5.00), (81.67±5.77)  dan TKP (84.58±6.30), (85.57±9.04), (84.13±5.55). Kualitas air pada media pemeliharaan yang meliputi suhu, DO, pH, dan amonia berada pada kisaran yang sesuai untuk budidaya ikan nila. Tilapia fish (O. niloticus) is one of the commodities freshwater fish which gets huge attention for the fisheries business especially in the community nutrition improvement business in Indonesia. Things to consider to increase fish production are feed management,optimum stocking density and change management water quality. This research aims to know the amount of the best media water turn and knowing the effect of media water change as much as 0, 50, 100, and 150%/day over survival rate, the efficiency utilization of feed, protein efficiency ratio and relative growth in Tilapia fish. Method in this research of experimental design of randomized design complete over 4 treatments with 3 repetitions. The treatment given are  A (0%), B (50%), C (100%), and D (150%) per day water exchange. The materials used are Tilapia fish given solid bucket container with stocking density 1 ind/litre. Feeding was twice a day i.e. morning and afternoon, satiation given. Parameters of water quality data measured include DO, pH, temperature and ammonia. The exchange the best water on seed breeding of Tilapia fish achieved at 50, 100, 150%/day with the value of the RGR (7,68±0,72), (7,95±0,89), (7,84±0,44), PER (0,94±0,04), (0,97±0,05), (0,96±0,06), EPP (38,39±1,47), (39,43±2,27), (38,82±2,42)  SR (81,67±5,7), (70,00±5,00), (8,67±5,77), and TKP (84,58±6,30), (85,57±9,04), (84,13±5,55). Water quality maintenance media which include temperature, DO, pH, and ammonia are in the range that suitable for fish farming of tilapia.
PENGARUH PEMUASAAN TERHADAP PERTUMBUHAN DAN PROFIL DARAH IKAN LELE DUMBO (Clarias gariepinus) PADA SISTEM RESIRKULASI Widyantoro, Wisnu; Sarjito, -; Harwanto, Dicky
Journal of Aquaculture Management and Technology Vol 3. No 2 (2014): Journal of Aquaculture Management and Technology
Publisher : Journal of Aquaculture Management and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.875 KB)

Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh pemuasaan pakan terhadap pertumbuhan dan profil darah ikan lele dumbo pada sistem resirkulasi. Metode yang digunakan adalah metode eksperimental. Ikan uji yang digunakan adalah ikan lele dumbo dengan panjang 7,87±0,09 cm dan berat 4,01±0,20 g sebanyak 120 ekor atau 10 ekor per perlakuan. Penelitian ini menggunakan 4 perlakuan 3 ulangan. Variabel yang dikaji meliputi nilai laju pertumbuhan spesifik/spesifik growth rate (SGR), efisiensi pemanfaatan pakan (EPP), dan profil darah. Perlakuan A (pemberian pakan setiap hari), perlakuan B (pemberian pakan selama 6 hari diikuti pemuasaan pakan 1 hari); perlakuan C (pemberian pakan selama 5 hari diikuti pemuasaan pakan 2 hari); dan perlakuan D (pemberian pakan selama 4 hari diikuti pemuasaan pakan 3 hari). Pengukuran profil darah dilakukan untuk mengukur kadar darah dalam tubuh ikan lele yang diberi perlakuan. Nilai SGR dari perlakuan A, B, C dan D berturut-turut adalah 2,57±0,06 %/hari, 2,17±0,11 %/hari, 1,65±0,10 %/hari, dan 1,80±0,08 %/hari. Nilai EPP dari perlakuan A, B, C dan D berturut-turut adalah 58,14±1,02 %, 54,64±2,94 %, 43,76±2,30 %, dan 47,56±2,25 %. Profil darah pada ikan lele yang diberi perlakuan menunjukkan hasil rata-rata masih berada dibawah kadar normalnya, hasil ini disebabkan karena kurangannya nutrisi pakan. Dengan demikian, pemuasaan pakan ikan lele pada sistem resirkulasi memberikan pengaruh yang nyata terhadap pertumbuhan dan pemanfaatan pakannya.              The effect of fasting time on the growth and bloods profile of catfish (Clarias gariepinus) in recirculating system were investigated. This research was used experimental method. One hundred and twenty catfishes with length 7.87±0.09 cm and weight 4.01±0.20 g or 10 fish per treatment were tested under 4 treatments and 3 replicates. The variables including specific growth rate (SGR), efficiency of feed utilization (EPP), and profile of blood were examined. Four treatments were devided into A (feeding every day), B (feeding for 6 days followed by 1 day starvation), C (feeding for 5 days followed by 2 days starvation); and D (feeding for 4 days followed by 3 days starvation). Measurement of blood profiles was carried out to measure the levels of blood in catfish’s body that given preferential treatment. The SGR values of treatment A, B, C and D are 2.57±0.06 %/d, 2.17±0.11 %/d, 1.65±0.10 %/d, and 1,80±0,08 %/d, respectively. The EPP values of treatment  A, B, C and D are 58,14±1.02 %, 54.64±2.94 %, 43.76±2.30 %, and 47.56±2.25 %, respectively. Value of blood profile on catfish under treatment showed lower than normal levels, this result due to lack of feed nutrients. Thus, starvation on catfish in reciculating system has a significant effect on growth and  efficiency of feed utilization.
PENGARUH RASIO C/N BERBEDA TERHADAP RASIO KONVERSI PAKAN DAN PERTUMBUHAN BENIH LELE (Clarias sp.) DALAM MEDIA BIOFLOK Imron, Ali; Sudaryono, Agung; Harwanto, Dicky
Journal of Aquaculture Management and Technology Volume 3, Nomor 3, Tahun 2014
Publisher : Journal of Aquaculture Management and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.021 KB)

Abstract

Intensifikasi budidaya lele dapat memberikan dampak negatif bagi kesehatan lingkungan. Teknologi bioflok merupakan salah satu pemecah masalah lingkungan dan dapat meningkatkan produksi budidaya. Penelitian ini bertujuan untuk mengevaluasi penggunaan sistem bioflok dengan rasio C/N berbeda terhadap rasio konversi pakan, pertumbuhan dan kelulushidupan lele, menentukan jenis rasio C/N yang menghasilkan rasio konversi pakan dan pertumbuhan lele terbaik.   Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 3 perlakuan dan 3 ulangan. Perlakuan yang diujikan adalah penambahan karbon tapioca dalam media bioflok dengan rasio A C/N 12 (tapioka), B C/N 18 (tapioka), dan C C/N 24 (tapioka). Hewan uji menggunakan benih lele dengan bobot rata-rata individu sebesar 7,16±0,36 g. Lele dipelihara pada ember berdiameter 60 cm dengan volume 10 L selama 42 hari dan pemberian pakan 5% dari berat biomassa. Hasil penelitian menunjukkan bahwa pengaruh rasio C/N berbeda terhadap rasio konversi pakan dan pertumbuhan benih lele (Clarias sp.) tidak berpengaruh  nyata (P>0,05) terhadap rasio konversi pakan (Clarias sp.) dalam  media bioflok. Penggunaan C/N ratio yang berbeda  berpengaruh  nyata (P<0,05) terhadap pertumbuhan dan tidak berpengaruh nyata (P>0,05) terhadap kelulushidupan lele (Clarias sp.) dalam media bioflok, rasio C/N yang terbaik menghasilkan pertumbuhan dan rasio konversi pakan yaitu C/N 24, dibandingkan dengan C/N 12 dan C/N 18. Laju pertumbuhan spesifik yang dicapai pada perlakuan A, B, dan C berturut-turut adalah 2,20; 2,38; dan 2,58%/hari.  Nilai FCR yang dicapai adalah 1,16; 1,12; dan 1,06. Nilai kelulushidupan lele berkisar antara 83-86,7%. Dan total konsumsi pakan sebesar 11,60;11,62; dan 11,18 g. Penelitian ini membuktikan bahwa pengaruh rasio C/N berbeda terhadap penambahan karbon tapioka  dalam media bioflok dapat meningkatkan biomassa sel bakteri yang dapat dimanfaatkan sebagai pakan tambahan bernutrisi. Penelitian ini membuktikan bahwa rasio C/N yang berbeda tidak memberikan pengaruh nyata (P>0,05) terhadap rasio konversi pakan dan berpengaruh nyata (P<0,05) terhadap pertumbuhan lele dalam media bioflok. Intensification of catfish cultivation can give negative effects to the health of environment. Biofloc technology is one of the way to solve the environment problems and can increase cultivation production. This research aim to evaluate the of biofloc system with ratio C/N different with the ratio of catfish food convertion, different with growth and catfish survival; determine the ratio type C/N that resulting in food ratio convertion and growth of the best catfish. This research uses Complete Random Desaign (CRD) with 3 treatment and 3 repetition. The treatment that is tested is by adding carbon tapioca in the biofloc medium with ratio A C/N 12 (tapioca), B C/N 18 (tapioca). And C C/N 24 (tapioca). Animals trial uses catfish seeds with weight aproximately per individu 7.16 ± 0.36. Catfish cultivates in buckets with diameter 60 cm and volume 10 liter for 42 days and feeding with 5 % from their biomass. The result of this research shows that the effect of ratio C/N is different with feed convertion ratio and the growth of catfish seeds (Clarias sp.) doesn’t any effects (P > 0.05) on food convertion ratio (Clarias sp.) in biofloc medium. The ussing C/N ratio that is different gives the real effects (P < 0.05) towards the catfish survival (Clarias sp.) in the biofloc medium, C/N ratio that gives the best resulting on the growth and food convertion ratio is C/N 24, compared with C/N 12 and C/N 18. The specific growth rate that are achieved on A, B, and C treatments is 2.20 ; 2.38 ; and 2.58 % /day. The FCR value that is achieved 1.16 ; 1.12; and 1.06. The catfish survival value aproximately between 83-86,7 % and the total feeding consumtion is  11.60 ; 11.62 ; and 11.18 g. This reseacrh proves that adding the tapioca carbon in by biofloc medium can increase the biomass bacteria cells that can be used as nourishing additional food. This study proves that the C / N ratio was not different significant effect (P> 0.05) on feed conversion ratio and significantly (P <0.05) on the growth of catfish in biofloc medium.
The Effectiveness of Three Biofilter Media on Total Ammonia Nitrogen (TAN) Removal and Survival Rate of Tilapia Gift Seeds (Oreochromis niloticus) in Recirculation Aquaculture System Mira Andhika Pierrenia; Sri Rejeki; Dicky Harwanto
Journal Omni-Akuatika Vol 17, No 2 (2021): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2021.17.2.899

Abstract

Efforts to increase tilapia production are carried out through intensive culture by taking into account various aspects that support fish survival. The culture system that supports intensive culture is the Recirculation Aquaculture System (RAS). The RAS technology has the ability to support aquaculture with very high density and high yields compared to open culture systems. This study aims to determine the effect of different biofilter media in RAS on decreasing TAN concentration and growth of tilapia seeds. The method used was experimental with three treatments and four replications. Tilapia with an average individual weight of 3.40 ± 0.15 g were maintained in RAS with three different biofilter media treatments, sand (A), polystyrene microbeads (B) and kaldnes (C). The parameters observed were pH, DO, temperature, TAN removal efficiency, specific growth rate (SGR) and survival rate (SR). The results showed that different biofilter media had a significant effect (P <0.05) on the TAN removal efficiency value but had no significant effect (P> 0.05) on the SGR and SR values. The sand biofilter treatment (A) gave the best TAN removal efficiency of 36.61±4.82%.Key words: Kaldnes, Polystyrene, Sand, TAN, Tilapia
Increasing Production Efficiency of Maggot with Integrated IoT Censor for Effective, Efficient, and Organized Prototype for Natural Feed in Aquaculture Nadia Elisabet Br. Hutapea; Lisya Junus; Putri Puspita Ningrum; Hani Wahyunida Isnaini; Muchammad Zidni Ilman; Nurul Aziz; Dicky Harwanto
Journal Omni-Akuatika Vol 18 (2022): Omni-Akuatika Special Issue 4th Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.S1.974

Abstract

The need for feed determines 60-70% of aquaculture total production cost. Hence, the feed factor plays a very important role in performing an effective, efficient, inclusive, and sustainable aquaculture. The requirements needed to be a good cultivar are fulfilment of macronutrients and micronutrients, toxin-free, and accessible. Maggot can be used as a natural feed alternative in cultivation activities due to its sufficient nutrients content. Since 2012, aquaculture activities in Indonesia have increased alongside the rising needs for food and population growth. In this research, we conducted a research on the cultivation process of maggot by constructing three effective, efficient, and organized prototypes to achieve natural feed alternative for fish. In the first prototype, the hatching container (70x80x50 cm) will be designed with IoT censor for environmental parameter that is accessible in real time via the Blynk IoT platform. The second prototype is the vertical biopond, in which the structure and plastic container will be used to grow maggot. The structure of vertical biopond will be that of two-rack wood shelf with size specification of 80x100x34 cm. An important note to take, all designs will be created vertically. The third prototype is a 3 in 1 stall that has three components which are green net (200x150x100 cm), pupation container (30x42x15 cm), and hatching container (20x23x10 cm). All three designs can optimize the provision of economical and ecological feed that supports the fulfilment of Sustainable Development Goals in Indonesia.Keywords: Aquaculture, Black soldier fly, Internet, Natural feed, and SDGs 
The Role of Filter with Different Media Compositions on Water Quality and Survival of Pangasius (Pangasius sp.) in Recirculation Aquaculture System Ariska Nur Oktavia; Sri Hastuti; Dicky Harwanto
Journal Omni-Akuatika Vol 17, No 1 (2021): 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.2021.17.1.824

Abstract

The high market demand for Pangasius (Pangasius sp.) has encouraged farmers to adopt a cultivation system with high stocking densities and high feeding rates. This causes fish farming waste to increase and ammonia in the waters also increases, resulting in a decrease in water quality. One of the efforts to overcome this problem is by using Recirculation Aquaculture System (RAS). This study aims to examine the effect of filters with different media compositions in RAS of Pangasius. Test fish, average weight of 4.59 g, kept for 30 days in aquarium with a density of 1.15 g.L-1. The feed is given at satiation, twice a day. There were five treatments and four replications during study. The treatments were the difference composition of filter media, i.e. A (100% zeolite), B (25% net + 75% zeolite), C (50% net + 50% zeolite), D (75% net + 25% zeolite), and E (100% net). Dacron was used as a mechanical filter in all treatments. The results showed that the composition of different filter materials had a significant effect (P <0.05) on Survival Rate (SR), Total Amount of Feed Fed (TFF), Relative Growth Rate (RGR), and Feed Conversion Efficiency (FCE). The best performance was showed by media biofilter composition of 25% nets + 75% zeolite, with the value of VTR (Volumetric Total Ammonia Nitrogen Removal) were 55.45-66.32 g.m-3.day-1, SR was 93.75%; TFF was 124.84 g; RGR was 2.13%.day-1, and FCE was 46.87%. Various different compositions of net and zeolite as filter media on RAS were able to manage TAN below tolerance limit.Keywords: catfish, recirculation system, filter composition, dacron, net, zeolite.
Production Performance of Gracilaria verrucosa using Verticulture Method with Various Wide Planting Area in Karimunjawa Titik Susilowati; Agus Nadlir; Alfabetian Harjuno Condro Haditomo; Seto Windarto; Dicky Harwanto; Kurnia Adi
Journal Omni-Akuatika Vol 15, No 1 (2019): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (398.972 KB) | DOI: 10.20884/1.oa.2019.15.1.671

Abstract

Gracilaria verrucosa is one type of seaweed that can be developed into a high-value product. Market demand for agar reaches 21.8% per year, but only 13.1% can be met. This is due to the low level of production of G. verrucosa in Indonesia. Utilization of G. verrucosa is still relying on aquaculture from the farm, which causes low production. Cultivation of seaweed with verticulture methods can increase the production of G. verrucosa. Karimunjawa is a potential area for seaweed cultivation. The aim of this study is to determine the effect of different density areas on the growth and production of G. Verrucosa and to determine the best density area for its production in Karimunjawa. This research used G. verrucosa wrapped in a mesh size of 0.5cm with a weight of 50g per pack. Each verticulture strap contains 4 packs and each treatment consists of 9 straps. The treatment was in the form of differences in the planting area of 25x25cm2 (A), 50x50cm2 (B) and 75x75cm2 (C). The results showed significant differences (P <0.01) between each treatment. The 75x75cm2 area has the best yield on absolute growth, relative growth rate (RGR) and specific growth rate (SGR) of 83.10 ± 4.12g; 3.96 ± 0.20% / day and 2.33 ± 0.07% / day. The best results of G. verrucosa production obtained at an area of 50x50cm2 (5.32 ± 0.26 kg / m2).
Co-Authors - Desrina, - Agung Sudaryono Agus Nadlir Alfabetian Harjuno Condro Haditomo Ali Imron Ariska Nur Oktavia Astarini Shabrina Aryanti Ayudya Wisma Hapsari Bella Manik Hapsari CHONDRORESMI BANOR FAWWAZ Hani Wahyunida Isnaini Herna Octivia Damayanti Istiqomah, Dian Annisa Johannes Hutabarat Kurnia Adi Lisya Junus Mamluatul Lailiyah Martha Wahyuningrum Metachul Husna Mira Andhika Pierrenia Muchammad Zidni Ilman Nadia Elisabet Br. Hutapea Norma Afiati Nurul Aziz Panjaitan, Rio Judika Samuel Putri Puspita Ningrum Riyan Hidayat Rosa Amalia Sarjito - Seto Windarto Sigit Bayu Aji Sri Hastuti Sri Rejeki Suminto Suminto Titik Susilowati Tristiana Yuniarti Wisnu Widyantoro