Production performance and business analysis of clown loach Chromobotia macracanthus (Bleeker 1852)  in recirculating systems with different stocking densities and water discharge

Aquaculture is is often constrained by the availability of water, both in quality and quantity. The aim of this study was to determine the optimum maintenance system of elver (Anguilla bicolor bicolor) on a wet, moist and dry system through production performance studies and physiological responses. The research was conducted from August to September 2018 at the Production Technic and Management of Aquaculture Laboratory, Department of Aquaculture, IPB University. A completely randomized design with 5 treatments and 3 replications was used in this study, namely treatment with high water wet system 0% of body height (A), high water wet system 50% of body height (B), high water wet system 100% of body height (C), moist system (D), and dry system (E). The body weight of elver was 18.80 ± 0.62 g which derived from fish cultivator in Bogor, West Java. Fish was fed 3 times per day at satiation with commercial feed which a protein content of 50%. Results showed that treatment C was the best result with survival rate of 100%, the specific growth rate of 0.45% day -1, the absolute growth rate of 0.07 g day 1 and feed conversion ratio of 6.57. The analysis of variance showed that the treatments showed the significant effect (P <0.05). The blood glucose value closest to the eel condition before treatment was found in the treatment C.

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Improved performance of botia fish Chromobotia macracanthus with the utilization of blood clam shell in the recirculation system

Jurnal Akuakultur Indonesia ◽

10.19027/jai.19.2.160-170 ◽

2020 ◽

Vol 19 (2) ◽

pp. 160-170

Author(s):

Rani Ria Rizki ◽

Iis Diatin ◽

Tatag Budiardi ◽

Irzal Effendi

Keyword(s):

Water Quality ◽

Environmental Changes ◽

Ph Value ◽

Stocking Density ◽

Production Performance ◽

Randomized Design ◽

Fish Samples ◽

Recirculation System ◽

Blood Clam ◽

Improved Performance

ABSTRACT Intermediate and holding rearing of botia face several problems such as the limited land, water quality, and decreased growth. The application of a recirculation culture system using the blood clam filter is increased to water quality and expected to solve the problems. This study aimed to analyze the production performance of botia fish on intermediate and holding rearing in the recirculation system by utilizing blood clams as the filter. This study used a factorial completely randomized design with two factors; clam particle sizes (1 mm, 2 mm, and 3 mm) and dosages (1.4 g/L, 1.8 g/L, and 2.2 g/L). Every experiment was conducted in three replication. The aquarium used in this study was 40×40×60 cm3. The size of fish samples was 3.5 ± 0.5 cm with the stocking density (3 fish/L, each test aquarium). The recirculation system was applied seven days before the fish were stocked. Every 15 days, weight and length of fish were measured (for 60 days). The results of physical (temperature) and chemical (pH, dissolved oxygen, ammonia dan nitrite) water quality in the recirculation system using the blood clam filter showed good conditions for botia fish. The stress response of botia blood glucose and TKO fluctuates with environmental changes. Mineral water and fish produced by calcium, magnesium, and phosphorus increase until the end of maintenance. There is an interaction at TKH between particle size and the dose of blood shells, whereas, LMPW, LMPL, and RKP significantly different only the use of dose 2.2 g/L. Keywords: Clamshells, botia fish, pH value, minerals, recirculation. ABSTRAK Permasalahan pada proses penampungan ikan botia yaitu keterbatasan lahan, kualitas air yang buruk dan pertumbuhan ikan botia yang lambat. Penerapan sistem resirkulasi menggunakan cangkang darah dapat meningkatkan kualitas air dan kinerja produksi. Penelitian ini bertujuan menganalisis kinerja produksi budidaya ikan botia pada sistem resirkulasi dengan pemanfataan cangkang kerang darah sebagai bahan filter. Penelitian ini menggunakan rancangan acak lengkap faktorial dua faktor, yaitu ukuran partikel cangkang kerang darah (1 mm, 2 mm, dan 3 mm) dan dosis cangkang kerang darah (1.4g/L, 1.8g/L dan 2.2g/L). Setiap perlakuan dilakukan dengan tiga kali ulangan. Akuarium yang digunakan dalam penelitian berukuran 40×40×60 cm3. Ikan yang digunakan berukuran 3.5 ± 0.5 cm dengan padat tebar 3 ekor/L. Sistem resirkulasi dioperasikan selama tujuh hari sebelum ikan ditebar. Bobot dan panjang ikan diukur setiap 15 hari selama 60 hari pemeliharaan. Penelitian dalam sistem resirkulasi menggunakan cangkang kerang darah pada media filter menghasilkan kondisi kualitas air suhu, pH, oksigen terlarut, amonia dan nitrit air. Respons stres ikan berupa glukosa darah dan tingkat konsumsi oksigen (TKO) berfluktuasi seiring dengan perubahan lingkungan. Mineral air dan ikan yang dihasilkan meliputi kalsium, magnesium dan fosfos meningkat hingga akhir pemeliharaan. Parameter tingkat kelangsungan hidup (TKH) memiliki interaksi antara ukuran partikel dan dosis cangkang kerang darah, sedangkan untuk laju pertumbuhan bobot mutlak (LPMB), laju pertumbuhan panjang mutlak (LPMP) dan rasio konversi pakan (RKP) berbeda nyata dengan penggunaan dosis 2.2 g/L. Kata kunci: Cangkang kerang darah, ikan botia, pH, mineral, resirkulasi.

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Optimization of stocking density in intensification of mud crab Scylla serrata cultivation in the resirculation system

Jurnal Akuakultur Indonesia ◽

10.19027/jai.16.2.253-260 ◽

2017 ◽

Vol 16 (2) ◽

pp. 253

Author(s):

Yuni Puji Hastuti ◽

Kukuh Nirmala ◽

Iman Rusmana ◽

Ridwan Affandi ◽

Wahyu Budi Kuntari

Keyword(s):

Stocking Density ◽

Production Performance ◽

Scylla Serrata ◽

Food Conversion ◽

Mud Crab ◽

Absolute Growth Rate ◽

Randomized Design ◽

End Of Treatment ◽

Absolute Growth ◽

Mangrove Crabs

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

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The effectiveness of the use of filter on the number of Nitrosomonas sp. and water quality in aquaponics systems

Jurnal Akuakultur Indonesia ◽

10.19027/jai.17.1.1-8 ◽

2018 ◽

Vol 17 (1) ◽

pp. 1

Author(s):

Yuli Andriani ◽

, Zahidah ◽

Yayat Dhahiyat ◽

Ujang Subhan ◽

Irfan Zidni ◽

...

Keyword(s):

Water Quality ◽

Growth Rate ◽

Activated Carbon ◽

Average Length ◽

Fish Growth ◽

Silica Sand ◽

Filter Media ◽

Randomized Design ◽

Absolute Growth ◽

Filter Water

ABSTRACTThis study aims to determine the most effective type of living filter media for the bacteria Nitrosomonas sp. in order to improve water quality in aquaponics systems. The method used in this study was completely randomized design, consisting of five treatments and each was repeated three times. The treatments were: A (without addition of filter media), B (addition of palm fibers, silica sand, and activated carbon), C (addition of palm fibers, silica sand, gravel, and activated carbon), D (addition of palm fibers, silica sand, rocks, and activated carbon), and E (addition of palm fibers, silica sand, bioball, and activated carbon). Parameters measured were: 1) the number of Nitrosomonas bacteria, 2) water quality (ammonia, nitrate, and phosphate); and, 3) productivity of fish and Chinese spinach. Data were analyzed using a descriptive method. The findings show that the highest number of bacteria was found in treatment E, 9.29×105 CFU/mL on the bioball filter media and 4.43×105 CFU/mL in rearing tanks. The best water quality was in treatment B, with a concentration of ammonia of 0.17 mg/L, nitrate of 0.33 mg/L, and phosphate of 0.54 mg/L. Plant productivity was the best in treatment B in which the average length and weight reach 48.1 cm and 11.1 grams of plant/week, respectively. The best fish growth was seen in treatment C with an absolute growth rate of 4.4 grams and a specific growth rate of 1.9%/day. The recommended filter was made of Arenga pinnata fibers, silica sand, gravels, and active carbon of about 2 cm thick each.The results showed that the type of filter on the aquaponic system had an effect on the amount of Nitrosomonas sp. in water, water quality, and the productivity of Chinese spinach.Keywords: aquaponics, filter, water quality, Nitrosomonas sp.ABSTRAKPenelitian ini bertujuan untuk menentukan jenis filter yang paling efektif sebagai media hidup bakteri Nitrosomonas sp. sehingga menghasilkan kualitas air yang baik dalam sistem akuaponik. Rancangan percobaan yang digunakan adalah rancangan acak lengkap, yaitu lima perlakuan dengan tiga kali pengulangan. Perlakuan dalam penelitian ini meliputi: A (tanpa penambahan media filter), B (penambahan media filter ijuk, pasir silika, dan karbon aktif), C (penambahan media filter ijuk, pasir silika, kerikil, dan karbon aktif), D (penambahan media filter ijuk, pasir silika, batu, dan karbon aktif), dan E (penambahan media filter ijuk, pasir silika, bioball, dan karbon aktif). Parameter yang diamati adalah: 1) jumlah bakteri, 2) kualitas air (meliputi amonia, nitrat, dan fosfat), serta 3) produktivitas ikan dan kangkung air. Data hasil penelitian dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa jumlah kelimpahan bakteri Nitrosomonas sp. tertinggi terdapat pada perlakuan E, yaitu 9,29×105 CFU/mL pada media filter bioball dan 4,43×105 CFU/mL pada media air pemeliharan. Adapun kualitas air terbaik yaitu pada perlakuan B dengan konsentrasi amonia 0,17 mg/L, nitrat 0,33 mg/L, dan fosfat 0,54 mg/L. Produktivitas kangkung terbaik yaitu pada perlakuan B dengan panjang rata-rata mencapai 48,1 cm dan bobot tanaman 11,1 gram/minggu. Pertumbuhan ikan terbaik terdapat pada perlakuan C, dengan nilai pertumbuhan ikan mutlak sebesar 4,4 gram dan pertumbuhan spesifik 1,9%/hari. Hasil penelitian menunjukkan bahwa jenis filter pada sistem akuaponik berpengaruh terhadap jumlah Nitrosomonas sp. dalam air, kualitas air, dan produktivitas tanaman kangkung. Filter yang disarankan dari hasil penelitian ini adalah yang tersusun atas ijuk, pasir silika, batukerikil, dan karbon aktif masing-masing setinggi ±2 cm.Kata kunci: akuaponik, filter, kualitas air, Nitrosomonas sp., produktivitas tanaman

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Growth of Goramy (Osphronemus goramy Lac 1801) Monoculture and Polyculture with Nilem (Osteochilus hasselti C.V)

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2021/v14i630313 ◽

2021 ◽

pp. 28-35

Author(s):

Ayi Yustiati ◽

Esa Jaya Dinata ◽

Herman Hamdani ◽

Ibnu Bangkit

Keyword(s):

Water Quality ◽

Growth Rate ◽

Survival Rate ◽

Feed Efficiency ◽

Stocking Density ◽

Pond Water ◽

National Standard ◽

Daily Growth Rate ◽

Daily Growth ◽

Randomized Design

This research was conducted to determine the optimal density of gorami (Osphronemus goramy Lac 1801) and nilem (Osteochilus hasselti C.V) polyculture with varios nilem density. The research are carried out in the maintenance pool of the Kawungsari Fish Farmers Group, Kertayasa Village, Pangandaran Regency, Indonesia. The research method used is an experimental method with 4 treatments and 4 replications using Completely Randomized Design (CRD). Variation of stocking densities carried out with the ratio of gorami: nilem is 30 : 0 fish m2 -1 (control), 30:10 fish m2 -1, 30: 20 fish m2 -1 and 30: 30 fish m2 -1. The fish are kept for 40 days in a pond with an area of 6 x 8 m and a height of 1.2 m. The fish used are gorami with 6-8 cm long and nilem with 4-6 cm long, gorami fish from the PangandaranKertayasa farmer group and nilem fish come from the seed hall which triggers gorami stock and nilem (BPPSIGN) Tasikmalaya. Obtained data are done at the beginning of the study and every 10 days, namely on day 10th, 20th, 30th and 40th. The parameters observed included daily growth rate, survival rate, feed efficiency, periphyton abundance and water quality. The results showed the stocking density of 30 fish m2 -1gorami with 20 fish m2 -1nilem was the most optimal stocking density with survival rate of 93.5%, daily growth rate of 1.19%, and gorami’s feed efficiency is 32.66%. Pond water quality including temperature, pH and dissolved oxygen is still within optimum range in accordance with the Indonesian National Standard for maintenance of gorami and nilem.

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Pertumbuhan Rumput Laut Kappaphycus alvarezii Yang Dikultur Menggunakan Dua Jenis Tali Ris Dengan Kondisi Berbeda

e-Journal BUDIDAYA PERAIRAN ◽

10.35800/bdp.3.1.2015.6929 ◽

2019 ◽

Vol 3 (1) ◽

Author(s):

Harnoto H ◽

Joppy D Mudeng ◽

Lukas L.J.J Mondoringin

Keyword(s):

Growth Rate ◽

Kappaphycus Alvarezii ◽

Daily Growth ◽

North Sulawesi ◽

Randomized Design ◽

Trial Length ◽

Long Line ◽

Two Factors ◽

Absolute Growth ◽

The Absolute

The study aimed to determine the growth of seaweed Kappaphycus alvarezii cultured using different type of rope ris with different conditions. The study was conducted over 64 days, starting on September 1 to November 3, 2014 Village Jaya Karsa, North Minahasa Regency, North Sulawesi. The experiment was designed according to 2x3 factorial experiment in a completely randomized design (CRD). Two factors were tested, namely rope ris type and conditions. Factors ris types strap consisted of two type: Monofilament nylon and Multifilament PE. Factor conditions of ris rope consisted of three levels, namely: new, used cleaned, and the former was not cleaned, so there were 6 treatments. Experiment container was floating longlines. One unit consisted of 3 longline trial. Length per longline 28.80 m, 18 pieces of string length of rope ris 1.6 m each strap was 7 point planting, planting the overall number of points 378 points planting. K. alvarezii seaweed seedlings obtained from Jaya Karsa farmers. Weighing was done 4 times, weighing early, 1 week, 2 weeks, and at the end of week 3, using a digital scale with a precision of 1 g. Accretion weight was calculated to be the absolute growth rate (g) and daily growth rate (%). The results showed that the absolute growth and the daily growth of seaweed K. alvarezii not significantly influenced by different type and condition of the rope ris. Keywords : Kappaphycus alvarezii, long line, Multifilament PE, Monofilament nylon.

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PENGARUH JENIS PAKAN BUATAN DAN ALAMI TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP LARVA UDANG VANAME (Litopenaeus vannamei)

Jurnal Akuakultur Rawa Indonesia ◽

10.36706/jari.v8i2.12760 ◽

2020 ◽

Vol 8 (2) ◽

pp. 176-192

Author(s):

Tiara Putri ◽

Supono Supono ◽

Berta Putri

Keyword(s):

Water Quality ◽

Growth Rate ◽

Survival Rate ◽

Litopenaeus Vannamei ◽

Feed Utilization ◽

Daily Growth ◽

Growth And Survival ◽

Randomized Design ◽

Feeding Methods ◽

Absolute Growth

The study aimed to determine how the growth and survival capabilities of vaname shrimp larvae (Litopenaeus vannamei) are affected by different feeding methods and thereby the most efficient method. The study was conducted at the PT. Citra Larva Cemerlang, South of Kalianda in Lampung Province. For the experiment Completely Randomized Design (CRD) was utilized with 3 feeding methods and each was replicated 3 times. The feeding methods tested were: fozen, liquid and powdered Artemia feed. The experiments were done with up to 5000 shrimps on Zoea 1 stadia per month, which were kept in rearing tanks for 17 days.The test parameters observed were absolute growth, specific growth rate, efficiency of feed utilization, survival rate and water quality. Based on the results of statistical analysis (Anova) feeding frozen Artemia gave the best results with absolute growth of 5,6 mg, daily growth rate of 0,33 mg/hari, efficiency of feed utilization of 0,27%, and survival rate of 72,9%. Water quality during maintenance temperatures obtained is 27,1-32oC, pH 7,73-8,26, dissolved oxygen 3,8-7,1 mg/l, salinity 30-34 ppt, ammonia 0,02-1,57 mg/l. Keywords: Litopenaeus vannamei, Artemia, growth, frozen, powder, liquid.

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Optimization of stocking density in intensification of mud crab Scylla serrata cultivation in the resirculation system

Jurnal Akuakultur Indonesia ◽

10.19027/jai.16.2.264-271 ◽

2017 ◽

Vol 16 (2) ◽

pp. 264

Author(s):

Yuni Puji Hastuti ◽

Kukuh Nirmala ◽

Iman Rusmana ◽

Ridwan Affandi ◽

Wahyu Budi Kuntari

Keyword(s):

Stocking Density ◽

Production Performance ◽

Scylla Serrata ◽

Food Conversion ◽

Mud Crab ◽

Absolute Growth Rate ◽

Randomized Design ◽

End Of Treatment ◽

Absolute Growth ◽

Mangrove Crabs

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

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PENGARUH FREKUENSI PEMBERIAN PAKAN PADA PENDEDERAN KE DUA IKAN LELE DUMBO YANG DIPELIHARA DI KOLAM TANAH

Jurnal Sains Natural ◽

10.31938/jsn.v1i1.5 ◽

2017 ◽

Vol 1 (1) ◽

pp. 1

Author(s):

Sri Sundari ◽

Estu Nugroho ◽

Jojo Subagja

Keyword(s):

Water Quality ◽

Growth Rate ◽

Survival Rate ◽

Design Of Experiment ◽

Critical Time ◽

Stocking Density ◽

Randomized Design ◽

Feed Management ◽

Survival And Growth ◽

Filter Selection

Effect of Feed Frequency on Second Rearing Larvae of Catfish Culture in Earthen Pond. Breeding is an important part in business scale of catfish. The critical time of catfish culture is in second rearing of larvae (from 2-3 cm to 8-10 cm) due to their canibalism. The successibility of seed rearing is depend on continuesly feed reservation, including feed management. The objective of this research was to get information about feed frequency given to seed reared in earthen pond. Research was conducted using farmer’s earthen pond in Pabuaran, Kemang Bogor district. Cat fish seed originated from farmer located in Bogor, with size of 2-3 cm per each and stocking density of 100 fish/m2. Treatments were feed frequency i.e. 2x; 4x and 6x in a day or night. Observed parameter were survival and growth rate, including water quality. Block Randomized Design of Experiment were used with two replications. Samping was conducted every 7 days. Result showed that there was statistically significant differences (P<0.05) among treatment in survival rate, while no statistically differences in growth rate of seeds length and weight. Feed frequency 2x at night gived the best result of survival rate and percentage of ”filter selection” was up to 80% and 37.76% respectivelly.Keywords : Feed frequency, second rearing, catfish ABSTRAK Salah satu skala bisnis ikan lele yang penting adalah pembenihan. Pada pembenihan lele, masa kritis salah satunya ditemui pada tahapan pendederan kedua (dari ukuran 2-3 cm ke 8-10 cm). Keberhasilan pendederan ini sangat tergantung pada kesediaan pakan yang kontinu, sehingga dapat menekan kanibalisme yang ada. Tujuan penelitian ini yaitu untuk mendapatkan informasi frekuensi pakan yang diberikan dengan tepat pada pendederan ikan lele yang dipelihara di kolam tanah. Penelitian ini dilaksanakan di kolam tanah di daerah pabuaran, Kemang, Bogor. Ikan uji yang digunakan adalah benih ikan lele ukuran ± 2-3 cm/ekor, dengan kepadatan 100 ekor/m2. Perlakuan yang diamati adalah frekuensi pemberian pakan, yaitu i) 2x, ii) 4x dan iii) 6x, baik dilakukan pada siang maupun malam hari. Secara garis besar parameter yang diamati dalam penelitian ini meliputi pertumbuhan, dan kelangsungan hidup serta sifat fisika dan kimia air. Rancangan percobaan yang digunakan adalah rancangan acak blok yaitu berupa waktu siang dan malam dengan 2 ulangan waktu. Sampling dilakukan 7 hari sekali. Hasil yang diperoleh menunjukkan adanya perbedaan yang nyata (P<0,05) dari perlakuan terhadap sintasan benih, namun tidak berbeda nyata pada laju pertumbuhan harian berat dan panjang benih. Pemberian pakan dengan frekuensi 2x pada malam hari memberikan pengaruh yang terbaik dengan sintasan mencapai 80%, dengan persentase lolos saring mencapai 37.76%.Kata kunci : frekuensi pakan, pendederan 2, ikan lele

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EVALUATION OF THE USE OF MALANG SAND AS A FILTER MATERIAL ON WATER QUALITY, PHYSIOLOGICAL RESPONSES AND PRODUCTION PERFORMANCE OF MUD CRAB Scylla serrata

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v12i3.32939 ◽

2020 ◽

Vol 12 (3) ◽

pp. 833-848

Author(s):

Yuni Puji Hastuti ◽

Arul Tabah Prastomo ◽

Ridwan Affandi ◽

Wildan Nurussalam ◽

Dudi Muhammad Wildan ◽

...

Keyword(s):

Water Quality ◽

Growth Rate ◽

Physiological Responses ◽

Production Performance ◽

Scylla Serrata ◽

Mud Crab ◽

Feed Conversion ◽

Absolute Growth Rate ◽

Absolute Growth ◽

Mud Crabs

Mud crab Scylla serrata is one of crustacean commodities with high economic value. One of the unsolved obstacles in mud crabs cultivation is crabs’ stress level caused by the declining water quality. The recirculating system is a method for maintaining water quality throughout the rearing period of culture crab. This system can use a variety of physical filter materials, such as zeolite, sand, and other materials. This study aimed to determine the amount of malang sand as a physical filter which positively affect the physiological responses and production performance of mud crabs. This research was carried out using a recirculating system with a completely randomized design conducted in five treatments with three replicates, i.e., malang sand with a weight of 0 kg (control), 5 kg, 10 kg, 15 kg, and 20 kg. The results proved that the best physiological response and production performance of mud crab was observed at malang sand treatment with a weight of 5 kg. This treatment showed specific growth rate, absolute growth rate for body weight, absolute growth rate for body length, and the survival rate of mud crabs with the highest value of 0.18±0.061%, 0.13±0.05 g/day, 0.0016±0.00006 cm/day, and 77.77%, respectively, yet it had the lowest feed conversion ratio of 3.76±004. In addition, the 5 kg treatment had water quality parameters in the tolerable ranges for mud crabs’ growth.

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