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All Journal HAYATI Journal of Biosciences Jurnal Ilmu Pertanian Indonesia Jurnal Akuakultur Indonesia Jurnal Teknologi Perikanan dan Kelautan Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Ilmu dan Teknologi Kelautan Tropis Jurnal Ilmu-Ilmu Perairan dan Perikanan Indonesia Jurnal Akuakultur Rawa Indonesia Maspari Journal Biospecies Bumi Lestari ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Natur Indonesia Berkala Perikanan Terubuk BIOTROPIA - The Southeast Asian Journal of Tropical Biology Maspari Journal Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Aceh Journal of Animal Science Jurnal Edukasi dan Sains Biologi JURNAL BIOLOGI INDONESIA ZOO INDONESIA Jurnal Biodjati Omni-Akuatika Acta Aquatica: Aquatic Sciences Journal Jurnal Pengelolaan Perikanan Tropis (Journal Of Tropical Fisheries Management) LIMNOTEK - Perairan Darat Tropis di Indonesia Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Indonesian Aquaculture Journal Jurnal Penelitian Perikanan Indonesia Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology) Molekul: Jurnal Ilmiah Kimia Best Journal (Biology Education, Sains and Technology) Zoo Indonesia Jurnal Risalah Kebijakan Pertanian dan Lingkungan Habitus Aquatica : Journal of Aquatic Resources and Fisheries Management Abdi Masya JESBIO : Jurnal Edukasi dan Sains Biologi Berkala Penelitian Hayati Manfish Journal Journal of Marine Studies MetaBio : Jurnal Pendidikan

RIDWAN AFFANDI

Departemen Manajemen Sumberdaya Perairan, FPIK IPB Kampus IPB Dramaga, Jalan Agatis 16680

Author-ID : 431625

Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Veterinary Other

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Penentuan pH optimum untuk pertumbuhan kepiting bakau Scylla serrata dalam wadah terkontrol Hastuti, Yuni Puji; Nadeak, Horas; Affandi, Ridwan; Faturrohman, Kurnia
Jurnal Akuakultur Indonesia Vol. 15 No. 2 (2016): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

ABSTRACT One of the abiotic factors that affects the growth and the survival of crabs is pH. The optimum pH media will give maximum impact on mangrove crabs because it is related with the osmoregulation process. This study aimed to examine the effect of pH on the survival rate (SR) and specific growth rate (SGR) of mangrove crab Scylla serrata through the reaction of physiological condition. This study consisted of the treatments with the pH medium 5 (A), pH medium 6 (B), pH medium 7 (C), and pH medium 8 (D). The crab’s maintenance in different pH gave a significant effect (P<0.05) on the survival rate of the crabs. The pH treatments also gave a significant effect (P<0.05) on the SGR of the crabs. The low level of crab stress at pH 7 was described by the total value of high hemocyte and the high osmotic load so that the pH 7 was the optimum condition for the crabs. Keywords: pH, survival, specific growth rate, mangrove crabs ABSTRAK Salah satu faktor abiotik yang mempengaruhi pertumbuhan dan kelangsungan hidup kepiting adalah pH. Media pH optimum akan memberikan dampak maksimum pada kepiting bakau karena terkait dengan proses osmoregulasi. Penelitian ini bertujuan untuk menguji pengaruh pH pada tingkat kelangsungan hidup (SR) dan laju pertumbuhan spesifik (SGR) kepiting mangrove Scylla serrata melalui reaksi kondisi fisiologis. Penelitian ini terdiri atas perlakuan dengan media pH 5 (A), sedang pH 6 (B), sedang pH 7 (C), dan menengah pH 8 (D). Pemeliharaan kepiting di pH yang berbeda memberikan pengaruh yang signifikan (P<0,05) pada tingkat kelangsungan hidup kepiting. Perlakuan pH juga memberikan efek yang signifikan (P<0,05) pada SGR dari kepiting. Rendahnya tingkat stres kepiting pada pH 7 digambarkan oleh nilai total hemosit tinggi dan beban osmotik tinggi sehingga pH 7 adalah kondisi optimum untuk kepiting. Kata kunci: pH, kelangsungan hidup, laju pertumbuhan spesifik, kepiting mangrove

Genetic variability and performance of Asian swamp eel Monopterus albus (Zuiew, 1793) from West Java cultured in saline water medium Soelistyowati, Dinar Tri; Syarif, Ahmad Fahrul; Affandi, Ridwan; Hidayatullah, Dendi
Jurnal Akuakultur Indonesia Vol. 16 No. 1 (2017): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

ABSTRACT Asian swamp eel Monopterus albus (Zuiew, 1793) is freshwater fish species which is prospective for domestic and export markets. The production is limited depend on the catches of natural population. The cultivation of eel has been carried out to increase the production for sustainability. This study was conducted to evaluate the genetic variability and performance of Asian swamp eel from West Java and its potential cultivation in water based media with salinity. Three populations from West Java were collected of different altitudes from Sukabumi (673 m asl), Cianjur (429 m asl), Karawang (51 m asl) sized 19–26.5 cm and weighed 4.95–11.4 g. The cultivation was performed during 30 days in water media without substrate at salinity 6 ppt with density of 1 kg/m2 and maintenance at container 50×30×30 cm completed with shelter pipe of ¾ inches diameter and 20 cm length, height of water 10 cm and water exchange 100% every day, fed at satiation using Tubificidae once a day. Genetically, all of the populations showed low heterozygosity at 1.19–1.23% and genetic distance 0.01–0.04. Asian swamp eel adapted better at water salinity 6 ppt which indicated by low mesure of osmotic gradient and blood glucose. Asian swamp eel from Karawang showed superior at survival rate (90%) and daily growth rate (1.42/day). Keywords: Asian swamp eel, Monopterus albus, cultivation, genetic variability, salinity ABSTRAK Belut sawah Monopterus albus (Zuiew, 1793) merupakan komoditas ikan air tawar potensial di pasar domestik maupun ekspor, namun produksinya masih mengandalkan hasil tangkapan dari alam karena budidaya belum berkembang. Penelitian ini bertujuan untuk mengevaluasi keragaman genetik dan keragaan belut sawah asal Jawa Barat dan potensinya untuk dikembangkan dengan teknik budidaya di air bersalinitas tanpa lumpur. Tiga populasi belut sawah dikoleksi dari lokasi di Jawa Barat dengan ketinggian berbeda yaitu Sukabumi (673 m dpl), Cianjur (429 m dpl), Karawang (51 m dpl). Sumber genetik belut berukuran 19–26,5 cm dan bobot berkisar 4,95–11,4 g dipelihara selama 30 hari dalam media air tanpa substrat bersalinitas 6 ppt. Wadah pemeliharaan berukuran 50×30×30 cm dilengkapi shelter pipa paralon diameter ¾ inci dan panjang 20 cm serta ketinggian air 10 cm. Padat penebaran ikan 1 kg/m2 (20 ekor/wadah), serta pergantian air 100% dilakukan setiap hari dan pemberian pakan berupa Tubificidae secara at satiation satu kali sehari. Secara genetik ketiga populasi menunjukkan tingkat heterosigositas yang rendah yaitu berkisar 0,19–0,23 % dan jarak genetik 0,01–0,04. Belut sawah menunjukkan respons adaptasi yang baik dalam media air tanpa substrat pada salinitas 6 ppt berdasarkan indikator beban osmotik dan kadar glukosa yang rendah. Belut sawah asal Karawang unggul pada laju pertumbuhan harian (1,42/hari) dan kelangsungan hidup (90 %). Kata kunci: belut sawah Monopterus albus, budidaya, keragaman genetik, salinitas

Survival and growth responses of snakehead fish Channa striata Bloch. juvenile in aerated and unaerated acid sulfate water Purnamawati, ,; Djokosetiyanto, Daniel; Nirmala, Kukuh; Surawidjaja, Enang Harris; Affandi, Ridwan
Jurnal Akuakultur Indonesia Vol. 16 No. 1 (2017): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

ABSTRACT The aim of the research was to analyze survival rate, specific growth rate, albumin, and feed efficiency and physiological (blood glucose, cortisol, dan haemoglobin) responses of snake head fish juvenil that reared at aerated and unaerated of tidal land water have been conducted in the laboratory. Experiments using completely randomized design with aerated and unaerated as a treatment, and each treatment has twelve replications. The snakehead fish juvenil wich length 2.4±0.2 cm and weight of 0.21±0.05 g reared in the aquarium that are size 30×25×35 cm (water volume 25 L) with a stocking density 2 juvenile/L, for 40 days. The fishes were fed with commercial feed with protein content about 40%, feeding two times a day (morning and afternoon) were at satiation. Replacement of water done every two days about 10% of the total water volume in the aquarium. The results showed that unaerated median significantly affected to biometric and physiological response of juvenile of snake head fish. The media un-aerated gives the best results shown by the higher value of survival (92%), specific growth rate (6.73%/ day), feed efficiency (78.22%), protein retention (41.91%), energy retention (30.81%) value of albumin (6.60 g/100 mL) and the haemoglobin (5.58 g/dL), and have the lowest value of cortisol (21.49 ng/L) and blood glucose (43.36 mg/100 mL). Keywords: acid sulfate water, growth rate, aeration, Channa striata ABSTRAK Penelitian ini bertujuan untuk menganalisis respons kelangsungan hidup, pertumbuhan spesifik, albumin, dan efisiensi pakan dan fisiologis (kortisol, glukosa darah, dan hemoglobin) juvenil ikan gabus yang dipelihara dengan dan tanpa aerasi pada media air rawa pasang surut. Penelitian menggunakan rancangan acak lengkap dengan aerasi dan tanpa aerasi sebagai perlakuan, dan masing-masing perlakuan memiliki 12 ulangan. Juvenil ikan gabus berukuran panjang 2,4±0,3 cm dan bobot 0,21±0,03 g dipelihara dalam akuarium 30×25×35 cm (volume 25 L) dengan padat tebar 2 ekor/L, selama 40 hari. Ikan diberi pakan berupa pakan komersial dengan kadar protein ±40%, pemberian pakan dua kali sehari (pagi dan sore) at satiation. Penggantian air dan penyiponan dilakukan dua hari sekali sebanyak 10% dari volume total dalam akuarium. Hasil penelitian menunjukkan bahwa perlakuan tanpa aerasi berpengaruh nyata terhadap respons biometrik dan fisiologis juvenil ikan gabus. Media tanpa aerasi memberikan hasil yang lebih baik ditunjukkan oleh kelangsungan hidup (92%), laju pertumbuhan spesifik (6,73%/ hari), efisiensi pakan (78,22%), retensi protein (41,91%), retensi energi (30,81%), kadar albumin (6,60 g/100 mL), dan hemoglobin (5,85 g/dL) yang lebih tinggi, sedangkan kadar kortisol (219 ng/L) dan glukosa darah (43,36 mg/100 mL) yang terendah. Kata kunci: media sulfat masam, pertumbuhan, aerasi, Channa striata

Application of gamal Gliricidia sepium leaves compost as depuration agent of leads (Pb) in the body organ of red tilapia Oreochromis sp. Robin, ,; Nirmala, Kukuh; Harris, Enang; Affandi, Ridwan; Jusadi, Dedi
Jurnal Akuakultur Indonesia Vol. 16 No. 1 (2017): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

ABSTRACT This study was aimed to perform depuration of Pb contained in tilapia body. The experiments were conducted in aquarium using compost of Gliricidia sepium leaf at a concentration of 10g/L, 20 g/L, 30 g/L, 40 g/L, and 0 g/L (control). The result showed that Pb level in fish muscle immersed with compost of Gliricidia leaf at a dose of 30 g/L for five days successfully decreased to a safe limit for human consumption (<0.3 mg/kg). However, decrease of Pb level in fish liver and kidney to finally reach the safe limit required seven days. Decreasing level of lead in the organs of experimental fish along with the increasing level of Pb in compost and maintenance media indicated that Pb accumulated in fish were released into the maintenance media by compost through chelation process. To conclude, compost of G. sepium leaves can be used as the material for depuration of Pb in the body of tilapia Keywords: humic acid, fulvic acid, depuration, Gliricidia leaves, lead, red tilapia ABSTRAK Penelitian ini bertujuan untuk mendepurasi Pb yang terkandung di tubuh ikan nila. Percobaan dilakukan di dalam akuarium menggunakan kompos daun gamal pada konsentrasi 10 g/L, 20 g/L, 30 g/L, 40 g/L, dan 0 g/L (kontrol). Hasil penelitian menunjukkan bahwa, Pb di daging ikan yang direndam dengan kompos daun gamal pada konsentrasi 30 g/L selama lima hari, kadarnya menurun hingga batas aman untuk dikonsumsi manusia (<0,3 mg/ kg). Penurunan Pb di hati dan ginjal untuk mencapai kadar aman membutuhkan waktu yang lebih lama, yakni tujuh hari. Seiring dengan menurunnya kadar Pb dalam organ ikan uji, kisaran Pb dalam kompos dan media budidaya meningkat, menunjukkan bahwa Pb dari tubuh ikan dilepaskan ke media budidaya dan terjadi proses khelat oleh kompos. Dengan demikian, kompos daun gamal bisa digunakan sebagai bahan pendepurasi Pb dari tubuh ikan nila. Kata kunci: asam humat, asam fulvik, depurasi, daun gamal, timbal, nila merah

Optimization of stocking density in intensification of mud crab Scylla serrata cultivation in the resirculation system Hastuti, Yuni Puji; Nirmala, Kukuh; Rusmana, Iman; Affandi, Ridwan; Kuntari, Wahyu Budi
Jurnal Akuakultur Indonesia Vol. 16 No. 2 (2017): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

ABSTRACT This study aimed to determine optimum stocking density of mud crab Scylla serrata through the applied of different stocking density in every treatment in recirculation system. Experimental design used was complete randomized design (CRD) with three density treatments which were 5 (P1), 10 (P2), and 15 ind/container (P3). All treatments replicated three times. The crab with the average of body weight 150 g/ind cultured in a plastic box (40×30×30 cm). Crab was cultured within 60 days and were fed two times a day by at satiation method. The result showed that P2 treatment gave the best result of mangrove crabs production performance among all treatments with 73.33±5.77% survival rate, 0.68±0.01 g/ind/day absolute growth rate and food conversion ratio 10.11±0.01. Treatment P1 gave the good response of stress, it indicated by the lowest glucose of all tretamnets at the level of 31.91 mg/dL in the end of treatment periods. The water quality during study period was fluctuative as affected by different stocking density in the treatments. Keywords: mud crab, stocking density, production performance ABSTRAK Penelitian ini bertujuan untuk menentukan padat tebar optimal kepiting bakau Scylla serrata melalui penerapan kepadatan tebar yang berbeda pada setiap perlakuan dalam sistem resirkulasi. Rancangan penelitian yang digunakan adalah rancangan acak lengkap dengan tiga perlakuan yaitu 5 (P1), 10 (P2), dan 15 ekor/wadah pemeliharaan (P3) dengan tiga ulangan. Kepiting bakau yang digunakan memiliki berat rata-rata 150 g/ekor. Wadah pemeliharaan yang digunakan selama pemeliharaan adalah kontainer plastik yang berukuran 40×30×30 cm. Pemeliharaan kepiting bakau dilaksanakan selama 60 hari dan diberikan pakan berupa ikan rucah dua kali sehari secara at satiation. Penelitian menunjukkan bahwa perlakuan P2 memberikan hasil kinerja produksi terbaik dibandingkan perlakuan lainnya dengan nilai kelangsungan hidup 73,33±5,77%, laju pertumbuhan mutlak 0,68±0,01 g/ekor/hari, dan rasio konversi pakan 10,11±0,01. Perlakuan P1 menunjukkan respons stres yang baik dengan memiliki nilai kadar glukosa paling rendah dari perlakuan lain yaitu 31,91 mg/dL pada akhir masa pemeliharaan. Kualitas air selama penelitian memiliki nilai yang fluktuatif di setiap perlakuan sebagai efek adanya perbedaan jumlah padat tebar setiap wadahnya Kata kunci: kepiting bakau, padat tebar, kinerja produksi

Optimization of salinity range for rearing glass eel Anguilla bicolor bicolor Hesti Lukas, Ade Yulita; Djokosetiyanto, Daniel; Budiardi, Tatag; Sudrajat, Agus Oman; Affandi, Ridwan
Jurnal Akuakultur Indonesia Vol. 16 No. 2 (2017): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

ABSTRACT Fasting is one of a method that used for measured growth of fish in a shorter period of time. This study was aimed to determine the optimum range of salinity for improve the survival and growth of glass eel Anguilla bicolor bicolor. It used a completely randomized design (CRD) with four salinity treatments and three replications, namely (A) 0 g/L, (B) 10 g/L, (C) 20 g/L, and (D) 30 g/L. The fish used were of glass eel A. bicolor bicolor with 0.15–0.23 g of weight. The experiment was conducted in an aquarium of 60×30×30 cm with a volume of 30 Liters and at a stocking density of 2 g/L for 14 days. During the maintenance, glass eels were fasted for have a significantly of biomass decline. Data collection was done at the start and the end of maintenance. Parameters measured included survival (%) and the rate of decline in absolute biomass (g). Physical and chemical parameters included temperature, dissolved oxygen, and pH which were measured daily, while ammonia and alkalinity were measured every seven days. Result showed that survival was not significantly different between treatments (P>0.05), while the rate of decline in absolute biomass was significantly different between treatments (P<0.05). Treatments of 0 g/L salinity was the lowest survival than the others. While treatment of 10 g/L salinity was the lowest rate of decline in absolute biomass. According to research, the optimum salinity was 10 g/L, and after analysis with quadratic regression analysis, the optimum range of salinity were 5.00–13.40 g/L. Keywords: optimum salinity, survival, growth, glass eel, Anguilla bicolor bicolor ABSTRAK Pemuasaan merupakan salah satu metode pengukuran perubahan bobot ikan yang dipelihara dalam waktu singkat. Penelitian ini bertujuan untuk menentukan kisaran salinitas optimum untuk meningkatkan kelangsungan hidup dan pertumbuhan glass eel Anguilla bicolor bicolor. Rancangan penelitian yang digunakan adalah rancangan acak lengkap (RAL), dengan empat perlakuan salinitas dan tiga ulangan, yaitu (A) 0 g/L, (B) 10 g/L, (C) 20 g/L, dan (D) 30 g/L. Penelitian dilakukan selama 14 hari. Ikan yang digunakan adalah glass eel A. bicolor bicolor dengan bobot 0,15–0,23 g dengan padat tebar 2 g/L. Pemeliharaan dilakukan di akuarium berukuran 60×30×30 cm dengan volume air 30 Liter/akuarium. Selama pemeliharaan glass eel dipuasakan sehingga diperoleh penurunan biomassa yang signifikan. Pengambilan sampel data dilakukan setiap tujuh hari berupa kelangsungan hidup (%) dan laju penurunan biomassa mutlak (g). Parameter fisika kimia air berupa ammonia dan alkalinitas dilakukan setiap tujuh hari, sedangkan suhu, oksigen terlarut (DO), dan pH dilakukan setiap hari. Hasil penelitian menunjukkan bahwa kelangsungan hidup tidak berbeda nyata antar perlakuan (P>0,05) sedangkan laju penurunan biomassa mutlak berbeda nyata antar perlakuan (P<0,05). Berdasarkan hasil penelitian, salinitas 10 g/L, 20 g/L, dan 30 g/L menunjukkan kelangsungan hidup 100%, sedangkan salinitas 0 g/L memberikan kelangsungan hidup terendah. Salinitas 10 g/L menunjukkan pemakaian energi terendah untuk metabolisme tubuh sehingga memberikan penurunan bobot biomassa terendah dibandingkan dengan perlakuan lainnya. Hasil penelitian menunjukkan salinitas optimum adalah 10 g/L, dan setelah dihitung menggunakan analisis regresi kuadratik, maka kisaran salinitas optimum adalah 5,00–13,40 g/L. Kata kunci: salinitas optimum, kelangsungan hidup, pertumbuhan, glass eel, Anguilla bicolor bicolor

The effect of temperature on the physiological condition and growth performance of freshwater eel elver Anguilla bicolor bicolor McClelland, 1844 Fekri, Latifa; Affandi, Ridwan; Rahardjo, Muhammad Fajar; Budiardi, Tatag; Simanjuntak, Charles Parningotan Haratua; Fauzan, Tezza; Indrayani, Indrayani
Jurnal Akuakultur Indonesia Vol. 17 No. 2 (2018): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

ABSTRACT This study aimed to analyze the effect of water temperature on the physiological condition and growth performance of freshwater eel elver Anguilla bicolor bicolor (McClelland, 1844). This study was conducted in March 2017 at the Physiology Laboratory of Aquatic Animal, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University. The study used a completely randomized design with five different levels of temperature (22°C, 24°C, 26°C, 28°C, and 30°C) as treatments with two replications. The size of elver was 2‒3 g. Fish were fed with 1 mm pellet containing 45% of protein. The feeding level was 7 % of fish biomass and the feeding frequency was two times a day. The results showed that temperatures range from 24‒30°C could be used for freshwater eel elver rearing and 28‒30°Cwere the best temperatures to support survival and growth performance of eel elver. A temperature of 24°C was the best temperature that could reduce the metabolism rate and did not cause stress on the elver. Keywords: elver, physiological conditions, growth performance, metabolism, temperature ABSTRAK Penelitian dengan tujuan menganalisis pengaruh suhu terhadap kondisi fisiologis dan kinerja pertumbuhan elver ikan sidat (Anguilla bicolor bicolor McClelland, 1844) telah dilakukan pada bulan Maret 2017 di Laboratorium Fisiologi Hewan Air FPIK IPB. Penelitian menggunakan rancangan acak lengkap dengan lima perlakuan suhu berbeda (22°C, 24°C, 26°C, 28°C, dan 30°C) dengan masing-masing dua ulangan. Ukuran benih yang digunakan 2‒3 g. Pakan yang diberikan berupa pellet berukuran 1 mm dengan kadar protein 45%. Jumlah pakan yang diberikan (FR) adalah 7% dari biomassa ikan dan diberikan dua kali sehari. Hasil penelitian menunjukkan bahwa kisaran suhu 24‒30°C dapat digunakan dalam pemeliharaan elver ikan sidat, dan suhu 28‒30°C merupakan suhu yang sangat baik untuk mendukung kelangsungan hidup dan pertumbuhan elver ikan sidat. Suhu media 24°C adalah suhu terbaik yang dapat menekan laju metabolisme dengan tidak menyebabkan stres pada elver ikan sidat. Kata kunci: elver, kondisi fisiologis, kinerja pertumbuhan, metabolisme, suhu

Production and business performance of Anguilla bicolor fingerlings in a recirculation system with different stocking densities Budiardi, Tatag; Diatin, Iis; Arlita, Kriswidya; Vinasyiam, Apriana; Sudrajat, Agus Oman; Setiawati, Mia; Affandi, Ridwan; Kamal, Mohammad Mukhlis; Wahju, Ronny Irawan; Nurilmala, Mala
Jurnal Akuakultur Indonesia Vol. 22 No. 2 (2023): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19027/jai.22.2.156-169

Eel (Anguilla bicolor) in the grow-out culture requires good fingerling seeds. Increasing the eel productivity can be done by increasing the stocking density, that should be balanced with good environmental and feed management. This study aimed to analyze the production and business performance of fingerlings in a recirculation system to increase the eel survival and growth rate. The study used a completely randomized design with three different stocking densities, namely 4 g/L (A), 5 g/L (B), and 6 g/L (C). The average weight of each fingerling was 20 ± 4.09 g, that was kept in a 1.5-m3 pond with a recirculation system. Feeding was performed two times a day using commercial feed with probiotic supplementation. The results showed that different stocking densities significantly affected feed conversion ratio, total biomass weight, and coefficient of variance. However, different stocking densities had no significant effect on survival rate, absolute weight growth rate, specific weight growth rate, and condition factor. The C treatment obtained the highest profit with an R/C ratio of 1.20 ± 0.03. The best production and cultivation performance of eel fingerling in a recirculation system with different stocking densities is found in treatment C (6 g/L). Keywords: Anguilla bicolor, business performance, production performance, recirculation system, stocking density ABSTRAK Budidaya ikan sidat (Anguilla bicolor) pada segmen pembesaran memerlukan benih yang baik khususnya untuk benih fingerling. Upaya peningkatan produksi benih ikan sidat dapat dilakukan dengan peningkatan padat tebar yang diiringi dengan manajemen lingkungan dan pakan yang baik. Tujuan penelitian ini menganalisis kinerja produksi dan kinerja usaha pada pemeliharaan fingerling dalam sistem resirkulasi sehingga meningkatkan kelangsungan hidup dan pertumbuhan. Penelitian menggunakan rancangan acak lengkap yang terdiri atas 3 perlakuan padat tebar dengan tiga ulangan, yaitu padat tebar 4 g/L (A), 5 g/L (B), dan 6 g/L (C). Fingerling ikan sidat yang digunakan berbobot awal 20 ± 4,09 g/ekor, yang dipelihara dalam bak 1,5 m3 dengan sistem resirkulasi. Pakan diberikan dua kali sehari berupa pakan buatan komersial yang diberi probiotik. Hasil penelitian menunjukkan bahwa padat tebar berpengaruh nyata terhadap parameter rasio konversi pakan, laju pertumbuhan mutlak biomassa, dan koefisien keragaman bobot tetapi tidak berpengaruh nyata terhadap tingkat kelangsungan hidup, laju pertumbuhan mutlak bobot, laju pertumbuhan spesifik bobot, dan faktor kondisi. Hasil analisis kinerja usaha budidaya fingerling dengan padat tebar berbeda menunjukkan berbeda nyata dan sebanding dengan kinerja produksi. Perlakuan C memberikan keuntungan tertinggi dengan rasio R/C sebesar 1,20 ± 0,03. Kinerja produksi dan kinerja usaha budidaya fingerling ikan sidat (Anguilla bicolor) dalam sistem resirkulasi dengan padat tebar berbeda terbaik terdapat pada perlakuan C (6 g/L). Kata kunci: Anguilla bicolor, kinerja produksi, kinerja usaha, padat tebar, sistem resirkulasi

Acute toxicity of mercury to freshwater cultured milkfish Chanos chanos: Clinical symptoms and lethal concentration assessment Ezraneti, Riri; Khalil, Munawar; Affandi, Ridwan; Nirmala, Kukuh
Journal of Marine Studies Volume 1, Issue 2 (July, 2024)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/joms.v1i2.17880

The increasing use of mercury in the industrial sector poses significant risks to freshwater ecosystems and aquatic organisms. Milkfish (Chanos chanos), a widely consumed species, is now being reared in freshwater environments, raising concerns about mercury bioaccumulation and food safety. This study aimed to determine the median lethal mercury concentration for milkfish at 96 hours (LC50) in freshwater using an experimental approach and probit analysis. Five mercury concentrations were tested: 0 (control), 0 .110 mg Hg/L, 0.195 mg Hg/L, 0.347 mg Hg/L, and 0.618 mg Hg/L. The results indicated that mercury is highly toxic to milkfish, with a 96-hour LC50 of 0.147 mg Hg/L. Clinical symptoms observed included loss of reflex movements, irregular swimming, frequent surfacing with widened mouth and operculum openings, convulsions, and ventilation of the ram before mortality. These findings highlight the acute toxicity of mercury in freshwater milkfish and underscore the potential health risks associated with mercury contamination in aquaculture systems.

PERBANDINGAN HASIL BELAJAR SISWA DENGAN MENGGUNAKAN MODEL PEMBELAJARAN STUDENT TEAM ACHIEVMENT DIVISION DAN THINK PAIRAND SHARE PADA MATERI SISTEM EKSKRESI SECARA DARING KELAS VIII SMP NEGERI 4 PEMATANGSIANTAR TAHUN PELAJARAN 2020/2021 Affandi, Ridwan; Saragih, Marlindoaman
Jurnal Metabio Vol. 4 No. 1 (2022): MetaBio : Jurnal Pendidikan (Edisi Elektronik)
Publisher : Program Studi Pendidikan Biologi, Fakultas Keguruan Dan Ilmu Pendidikan Universitas Simalungun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36985/bkg60b69

This study aims to determine the differences in student learning outcomes and the magnitude of the differences in student learning outcomes using the Student Team Achievement Division and Think Pair and Share learning models on the excretory system online in grade VIII of SMP Negeri 4 Pematangsiantar in the 2020/2021 academic year. The population was 187 students, consisting of 6 classes, and the sample was taken using Cluster Random Sampling, resulting in two classes: experimental class 1 (VIII-5) with 32 students and experimental class 2 (VIII-8) with 32 students. Experimental class 1 was treated using the Student Team Achievement Division learning model, and experimental class 2 was treated using the Think Pair and Share learning model. Data analysis was carried out by finding the mean (X̅ ), standard deviation (S), and hypothesis testing (t-test) at a significance level of α = 0.05. The research results obtained an average post-test score of 86.09 for experimental class 1 and 85.16 for experimental class 2, with a difference in learning outcomes of 0.93. The results of the hypothesis testing (t-test) obtained thitung (2.625) > ttabel (1.99) at a significance level of α = 0.05 and degrees of freedom (dk) = 62. Therefore, Ho is rejected and Ha is accepted, meaning there is a difference in student learning outcomes using the Student Team Achievement Division and Think Pair and Share learning models on the online excretory system material for class VIII of SMP Negeri 4 Pematangsiantar in the 2020/2021 academic year. It was concluded that there is a difference in student learning outcomes using the Student Team Achievement Division and Think Pair and Share learning models on the online excretory system material for class VIII of SMP Negeri 4 Pematangsiantar in the 2020/2021 academic year.

Co-Authors , Suharsono -, Hariningsih . Sulistiono . Syafiuddin Abdul Rahman Singkam Abdul Rahman Singkam Ade Yulita Hesti Lukas Adinda Kurnia Putri Agoes Mardiono Jacoeb Agus Alim Hakim Agus Oman Sudrajat Agus Salim Ahmad Fachrudin Ahmad Fahrul Syarif Akhmad Firmansyah Alam Putra Persada Ali Mashar Alimuddin Am Azbas Taurusman Andi Chadijah Andi Gunawan Antonius Suwanto Apriana Vinasyiam Arlita, Kriswidya Asbar Laga, Asbar Azam B. Zaidy Bahiyah Bahiyah Bambang Kiranadi Bambang Priyo Utomo Benny Heltonika Cathrine Ferlianova Leuwol Cecep Kusmana Chair Rani Charles Parningotan Haratua Simanjuntak Daniel Djokosetiyanto Daniel R Monintja Daniel R Monintja DEDI JUSADI Dedi Soedarma Dedi Soedharma DEDI SOEDHARMA Dedy Soedharma Delismawati Lubis Dendi Hidayatullah, Dendi Desrita Desrita Didik Wahju Hendro Tjahjo Dietriech Geoffrey Bengen Dimas Angga Hedianto Dinar Tri Soelistyowati Djadja S . Sjafei Djadja S. Sjafei Djadja Subardja Sjafei Djadja Subardja Sjafei Djamar Tumpal F. Lumbanbatu Eddy Supriyono Efriyeldi, Efriyeldi Eko Harianto, Eko Elen Selviana Ena Sutisna Enang Harris Enang Harris Enang Harris Surawidjaja Enang Harris Surawidjaja, Enang Harris Endah Purnamawati Epa Paujiah, Epa Etty Riani F. Damianus Hukom Farida Nur Rachmawati Fauzan, Tezza Ferdinand Hukama Taqwa Firat Meiyasa Gadis Sri Haryani Gadis Sri Haryani Gadis Sri Haryani Gatot Yulianto Gema Wahyu Dewantoro Gema Wahyu Dewantoro, Gema Wahyu Hadra Fi Ahlina Haninditya, Beta Harahap, Antoni Hardono Manan Harpasis S. Sanusi Harpasis S. Sanusi Haryono . Haryono Haryono Haryono Haryono Haryono Haryono Haryono Haryono Hayono, Hayono Hayono, Hayono Henni Syawal Heru Setijanto Husain Latuconsina Iis Diatin Ilham Zulfahmi Iman Rusmana iman supriatna Iman Supriatna INDRAYANI INDRAYANI Ing Mokoginta ING MOKOGINTA Irzal Effendi Isdradjad Setyobudiandi Isdradjat Setyobudiandi Iska Angelika Ismudi Muchsin Ismudi Muchsin Istiyanto, Joko Jack Mamangke Jannesa Nasmi Jimmi . Jr., Muhammad Zairin Jusmaldi Jusmaldi Kadarwan Soewardi Kardiyo Praptokardiyo Kasful Anwar Khairunnisa, Nursifa Koeswinarning Sigit Kukuh Nirmala Kuntari, Wahyu Budi Kurnia Faturrohman Kurniawati H Ekosafitri La Eddy Larasati, Aulia Nur Latifa Fekri Lella Herdiana Lenny S Syafei M F Rahardjo M F Rahardjo M Mukhlis Kamal M. Apuk Ismane M. F. Rahardjo M. F. Rahardjo M. F. Rahardjo M. F. Rahardjo M. F. Rahardjo, M. F. M. Fadjar Rahardjo M. Mukhlis Kamal, M. Mukhlis M. Zairin Junior Mafatih Devi Safrina, Mafatih Devi Mala Nurilmala Mardani, Danis Aditya Marlindoaman Saragih Mennofatria Boer Menofatria Boer MF Rahardjo Mia Setiawati Mohammad Kamal Mohammad Mukhlis Kamal Mozes R. Toelihere MOZES R. TOELIHERE MOZES TOELIHERE Muchammad Sri Saeni Mufti Abdul Murhum MUHAMMAD AGUS SUPRAYUDI Muhammad Jamal Muhammad Mukhlis Kamal Muhammad Mukhlis Kamal Muhammad Mukhlis Kamal Muhammad Mukhlis Kamal, Muhammad Mukhlis Mukhlis Kamal Mulyadi . Mulyadi . Mulyadi Mulyadi Mulyadi Mulyadi Munawar Khalil Murniarti Brojo Nadeak, Horas Nanik Mustikaning Tyas Nastiti Kusumorini NASTITI KUSUMORINI Nidya KARTINI Nidya Kartini Norce Mote Norman Razieb Azwar Nur Bambang Priyo Utomo Nur Bambang Priyo Utomo Nur Bambang Priyo Utomo Nurfitri Triramdani Nurhidayat Nurhidayat Nurhidayat Nurhidayat Nurlisa Alias Butet Odang Carman Odilia Rovara Prastomo, Arul Tabah Priyo Handoyo Wicaksono Purnama Sukardi Purnama Sukardi Purnamawati, , R. Widjajakusuma Radhita Millaty Rahadjo, M F Rahadjo, M F Rahardjo, MF. Rahardjo, MF. Rahardjo, Muhammad Fajar Rahmadi Azis, Rahmadi Retno Cahya Mukti Rika Fauziah Riri Ezraneti Riri Ezraneti Rita Rachmawati Rizky Regina Kawirian Rizsa Mustika Pertiwi Robin, , Ronny I. Wahju Roza Elvyra Rudhy Gustiano Rudhy Gustiano Rudhy Gustiano Saddon Silalahi SATA YOSHIDA SRIE RAHAYU Seiichi Watanabe Setyo Wahyudi Siska Tridesianti Siti Nurul Aida Siti Sofiah Sri Wahyuni Srihadi Agungpriyono Sukenda Sukenda Sulistiono Sulistiono Sulistiono Sulistiono Sulistiono Sulistiono Sulistiono Surachman Suwardi Suradi Suradi Suradi Wijaya Saputra Sutrisno Sukimin Sutrisno Sukimin Syamsiar, Syamsiar Syamsul Bahri Agus, Syamsul Bahri TARUNI SRI PRAWAST MIEN KAOMINI ANY ARYANI DEDY DURYADI SOLIHIN Tatag Budiardi TATI NURHAYATI Thomas Nugroho Tjahjo Winanto Tjahjo Winanto, Tjahjo Tri Daryanto Tri Prartono Tri Wahyuni Tridesianti, Siska Triheru Prihadi, Triheru Triyanto Triyanto Triyanto Tussadiyah, Fadzillah Untung Susilo Untung Susilo Usman Muhammad Tang Vera Dewiana Bakhris Wahyuni, Sri Wasmen Manalu Widiana, Widiana Wildan Nurusallam Wildan Nurussalam Wildan, Dudi Muhammad Y. Hadiroseyani Yanti Sinaga Yonvitner - Yulfiperius, Yulfiperius Yuli Siti Fatma Yuli Wahyu Tri Mulyani Yulia Sistina Yulintine Yulintine Yulvian Sani Yuni Puji Hastuti Yunizar Ernawati Yusfiati Yusfiati Yusminah Hala Yusnarti Yus Zulfa Yandes

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