Optimisation of nursery rearing for megalopa of giant mud crab Scylla serrata (Forskal, 1775)

Three nursery rearing trials were conducted to overcome the inconsistent survival of megalopa of the giant mud crab Scylla serrata (Forskal, 1775) during metamorphosis to crab instar. In the first trial, 3-4 days old megalopa (4.73 mg mean body weight) were stocked in hapas erected in outdoor brackishwater ponds and indoor fiberglass (FRP) tanks at densities of 500 nos. m-2 and 1 no. l-1 respectively and reared for 15 days using minced clam meat (Meretrix casta) as feed. Outdoor hapas were provided with seaweed, Gracilaria tenuistipitata as shelter. Mean survival rate of crab instar following three consecutive runs were significantly higher (p<0.05) for megalopa reared in outdoor hapas (57.7±2.7%) over indoor FRP tanks (24.1±2.2%). To ascertain the life stage that yields optimal survival on weaning from indoor hatchery to ponds, zoea 5 (Z5) and megalopa 1-day old (M1), 2-day old (M2), 3-day old (M3) and 4-day old (M4) were reared in hapas for15 days and fed on minced clam meat. Three day and 4-day old megalopa demonstrated significantly higher survival rates (p<0.05) of 62.3±3.08% and 69.6±2.35% respectively to crab instar stage at conclusion of the trial. Megalopa (3-4 days old, 5.05 mg mean body weight) were stocked to 100 l tanks (stocking density - 1 no. 4 l-1) and reared for a period of 8 days using different feeds viz., artemia biomass (T1), minced clam meat (T2), crab larvae (T3) and artemia nauplii (T4) in the third trial to evaluate various production parameters. Crab instar conversion rate (number of crab instars/number of megalopa stocked × 100) was significantly higher (p<0.0001) for megalopa fed using artemia biomass (T1) and minced clam meat (T2) at 74.66±5.81% and 72.00±2.30% respectively. Results of the present study indicate that, high density rearing (500 no. m-2) of megalopa (3-4 days old) in outdoor hapas provided with seaweed refuge for short periods (15 days) would yield higher survival rate to crab stage. Nursery rearing of megalopa in ponds reduces the hatchery phase in mud crab larval rearing and maximise production of crab instars.

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THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)

Indonesian Aquaculture Journal ◽

10.15578/iaj.13.2.2018.63-69 ◽

2018 ◽

Vol 13 (2) ◽

pp. 63

Author(s):

Haryati Haryati ◽

Yushinta Fujaya ◽

Early Septiningsih

Keyword(s):

Survival Rate ◽

Artificial Diet ◽

Control Treatment ◽

Larval Rearing ◽

Mud Crab ◽

Artificial Diets ◽

Growth And Survival ◽

The Third ◽

Crab Larvae ◽

Research Experiment

Live foods such as rotifers and Artemia are commonly used as foods in larval rearing of mud crab (S. olivacea). However, the continuous availability and nutritional consistency of live foods are difficult to control. Thus, the development of artificial diets to partially or fully replaced live foods is needed to overcome the limitations of live foods. The purpose of this research was to determine the best stage at which mud crab larvae can be weaned from live foods to artificial diets. The research experiment consisted of: treatment-1, the larvae were fed with live foods from zoea-1 to megalopa stages as the control treatment; treatment-2, the larvae were fed with artificial diet from zoea-2 to megalopa stages; and treatment-3, the larvae were fed with artificial diet from zoea-3 to megalopa stages. In treatment-4, artificial diet was given from zoea-4 to megalopa stages. The growth and survival rate of larvae in treatment-1, 3, and 4 were not significantly different (P>0.05) but significantly different with treatment-2. Based on the present results, this study suggests that artificial diet can be given to mud crab larvae (S. olivacea) from the third zoea stage.

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Effect of salinity on the survival and growth of mud crabling, Scylla serrata

University Journal of Zoology Rajshahi University ◽

10.3329/ujzru.v29i1.9462 ◽

1970 ◽

Vol 29 ◽

pp. 29-32 ◽

Cited By ~ 3

Author(s):

MY Mia ◽

MMR Shah

Keyword(s):

Growth Rate ◽

Body Weight ◽

Specific Growth Rate ◽

Specific Growth ◽

Survival Rates ◽

Growth Increment ◽

Scylla Serrata ◽

Mud Crab ◽

Salinity Levels ◽

Survival And Growth

An experiment was conducted for a period of eight weeks under laboratory conditions to determine the effect of different salinity levels on the survival and growth of crablings of mud crab, Scylla serrata. The different salinity levels tested were: 5 ppt, 10 ppt, 15 ppt, 20 ppt and 25 ppt. The differences in growth increment in terms of body weight (BW) were significant (p<0.05) among different salinity treatments. The specific growth rate (SGR%/day) values of 2.67, 2.85, 4.07, 4.39 and 4.46 at 5 ppt, 10 ppt, 15 ppt, 20 ppt and 25 ppt, respectively were found significant (p<0.05). The survival rates of crablings were found to be the highest (47.67%) at 25 ppt and lowest (10%) at 5 ppt (p<0.05). The results indicated that increase of salinity from 5 to 25 ppt had significant effect on the survival and growth of mud crablings. Key words: Mud crabling; salinity; specific growth rate; survival rate DOI: http://dx.doi.org/10.3329/ujzru.v29i1.9462 UJZRU 2010; 29(1): 29-32

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SUBSTITUSI PENGGUNAAN NAUPLIUS ARTEMIA DENGAN PAKAN MIKRO DALAM PEMELIHARAAN LARVA KEPITING BAKAU, Scylla olivacea

Jurnal Riset Akuakultur ◽

10.15578/jra.13.1.2018.29-38 ◽

2018 ◽

Vol 13 (1) ◽

pp. 29 ◽

Cited By ~ 1

Author(s):

Usman Usman ◽

Kamaruddin Kamaruddin ◽

Asda Laining

Keyword(s):

Survival Rate ◽

Artificial Diet ◽

Digestive Enzyme ◽

Carapace Width ◽

Survival Rates ◽

Mud Crab ◽

Crab Larva ◽

Crab Larvae ◽

Artemia Nauplii ◽

Digestive Enzyme Activities

Adanya molting death sindrom yang umumnya terjadi pada stadia zoea-5 ke megalopa dan ke krablet-1 pada kepiting bakau, Scylla olivacea, diduga berkaitan dengan ketidakcukupan nutrien yang dikonsumsi larva, sehingga perlu dicobakan penggunaan pakan buatan (mikro) pada stadia tersebut. Penelitian ini bertujuan untuk mendapatkan dosis optimum penggunaan pakan mikro (micro diet, MD) untuk mensubstitusi penggunaan nauplius Artemia (Art) dalam pemeliharaan larva kepiting bakau. Hewan uji yang digunakan adalah larva kepiting bakau stadia zoea-4—5. Hewan uji tersebut dipelihara dalam wadah bak fibre berisi air laut 150 L dengan kepadatan 12 ind./L. Perlakuan yang dicobakan adalah pemberian pakan uji berupa: nauplius Artemia sebanyak 100% (100% Art), nauplius Artemia 75% + pakan mikro 25% (75% Art + 25% MD), nauplius Artemia 50% + pakan mikro 50% (50% Art + 50% MD), nauplius Artemia 25% + pakan mikro 75% (25% Art + 75% MD), dan pakan mikro 100% (100% MD). Pemberian pakan uji dilakukan pada pagi dan sore hari selama 15 hari pemeliharaan (hingga larva mencapai stadia krablet-1). Hasil penelitian menunjukkan bahwa pada penggunaan nauplius Artemia 50% + pakan mikro 50% didapatkan sintasan krabet-1 tertinggi (5,6%) dan berbeda nyata (<0,05) dengan sintasan krablet pada penggunaan 100% nauplius Artemia (sintasan 2,4%) dan 100% pakan mikro (sintasan 2,1%). Bobot badan, lebar karapaks krablet, dan aktivitas enzim pencernaan relatif sama di antara perlakuan. Penggunaan pakan mikro dapat menggantikan 50% penggunaan Artemia dalam pemeliharaan larva (zoea-5 hingga krablet-1) kepiting bakau.Cases of molting death syndrome generally occur on the transitional stage of zoea-5 to megalopa stage and to crablet-1 of mud crab, Scylla olivacea. It is suspected that the event could be related to nutrient insufficiency consumed by the larvae which can be supplemented using artificial diet (micro diet). This study aims to obtain an optimum dosage use of the micro diet (MD) to substitute the use of Artemia nauplii (Art) in the crab-larva rearing. Test animals used were mud crab larvae of zoea-4—5 stadia. The test animals were reared in the fiberglass containers, filled with seawater as much as 150 L, and stocked with a density of 12 ind./L. The treatments tested were feeding tests in the form of: Artemia nauplii as much as 100% (100% Art), Artemia nauplii 75% + micro diet 25% (75% Art + 25% MD), Artemia nauplii 50% + micro diet 50% (50% Art + 50% MD), Artemia nauplii 25% + 75% micro diet (25% Art + 75% MD), and micro diet 100% (100% MD). The larvae were fed daily in the morning and afternoon for 15 days until the larvae reach crablet stage. The results showed that the use of Artemia nauplii 50% + 50% micro diets obtained the highest survival rate (5.6%) of crablet-1 and significantly different (<0.05) with the survival rates of crablet fed with 100% of Artemia nauplii (survival rate of 2.4%) and crablet fed with 100% micro diet (survival rate of 2.1%). Body weight, carapace width of crablet, and digestive enzyme activities were relatively similar between the treatments. The use of micro diet could replace 50% of the utilization of Artemia nauplii in larvae (zoea-5 to crablet-1) rearing of mud crab.

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PENGARUH KEPADATAN TERHADAP SINTASAN, PERTUMBUHAN, DAN GAMBARAN DARAH BENIH IKAN BETUTU Oxyeleotris marmorata

Jurnal Riset Akuakultur ◽

10.15578/jra.12.4.2017.341-350 ◽

2018 ◽

Vol 12 (4) ◽

pp. 341

Author(s):

Tri Heru Prihadi ◽

Adang Saputra ◽

Gleni Hasan Huwoyon ◽

Brata Pantjara

Keyword(s):

Body Weight ◽

Survival Rate ◽

Physiological Response ◽

Hematological Parameters ◽

Survival Rates ◽

Stocking Density ◽

High Growth ◽

Water Volume ◽

Fish Length ◽

Growth And Survival

Ikan betutu Oxyeleotris marmorata merupakan ikan lokal potensial menjadi komoditas budidaya. Performa pertumbuhan dan sintasan dapat ditingkatkan dengan mengoptimalkan padat tebar. Tujuan penelitian adalah menentukan padat tebar yang menghasilkan sintasan dan pertumbuhan tinggi, serta respons fisiologis terbaik. Kolam yang digunakan berukuran 2 m x 1 m x 1 m dan diisi air 1 m3. Perlakuan yang diuji adalah kepadatan 50 ekor/m3, 100 ekor/m3, dan 150 ekor/m3. Ukuran benih yang digunakan 4,24 ± 0,58 cm dengan bobot 2,74 ± 0,45 g. Selama 60 hari masa pemeliharaan, pakan yang diberikan adalah cacing sutra Tubifex sp. secara sekenyangnya. Hasil penelitian menunjukkan sintasan benih ikan betutu yang dipelihara pada berbagai padat tebar tidak berbeda secara nyata, pertumbuhan spesifik panjang (1,50 ± 0,37%/hari) dan bobot total benih ikan betutu (1,95 ± 0,32%/hari) tertinggi, dan perubah respons fisiologis berupa gambaran darah paling stabil dicapai pada padat tebar 50 ekor/m3, serta biomassa tertinggi dicapai pada kepadatan 150/m3. Hasil penelitian ini dapat dijadikan informasi dasar untuk melakukan pendederan ikan betutu secara terkontrol.Sand goby, Oxyeleotris marmorata is a potential fish species for aquaculture in Indonesia. However, the growth performance and survival rate of the fish seed are still low. Such challenges could be solved through the optimization of stocking density of the fish. The research objective was to determine the optimal stocking density to produce high growth and survival rate, as well as the best physiological response. The ponds used in this experiment were 2 m x 1 m x 1 m in size (water volume: 1 m3). The stocking density treatments were 50, 100, and 150 individual/m3. The initial fish length average was 4.24 ± 0.58 cm, with the initial body weight average of 2.74 ± 0.45 g. During 60 days of rearing period, the fish were fed with Tubifex sp. ad libitum. The results showed that the survival rates on different stocking densities were not significantly different. The highest specific growth on length (1.50 ± 0.37%/day) and body weight total (1.95 ± 0.32%/day) and the most stable physiological response related to its hematological parameters were achieved by seed stocked at 50 individuals/m3. The best biomass total was achieved by seed stocked at 150 individuals/m3. The result of this study could be applied as basic information to culture sand goby in a controlled environment.

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THE MASS SEED PRODUCTION OF GOLDEN TREVALLY FISH (Gnathanodon Speciosus Forsskal) WITH DIFFERENT FEED

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v6i2.9014 ◽

2015 ◽

Vol 6 (2) ◽

Author(s):

Tony Setia Dharma

Keyword(s):

Body Weight ◽

Survival Rate ◽

Seed Production ◽

Economic Value ◽

Stocking Density ◽

Food Type ◽

Larval Rearing ◽

Total Length

ABSTRACT Golden trevally fish is a prospective commodity that can be cultured and contains high economic value. The purpose of this study was to determine the best type of food for golden trevally fish growth. The larval rearing were conducted using concrete tanks with 6 m3 of volume. Three different food were used as treatments, i.e: (a) pellet micro, (b) small shrimp, and (c) trash fish. The start of experiment for larvae were reared for 30 days old. The stocking density of larvae was reared at 10 pc/l. Sampling of larvae were conducted every 7 days to measure of survival rate (SR), total length (TL) and body weight (BW). The larvae were reared with flowthrow system. At 70 days old, larvae were harvested and graded. The results showed that there was no significantly different among treatments (P>0.05) for survival rate, but the growth was significantly difference among treatments (P<0.05). The survival rate (SR) treated with trash fish was 5.38±1.20%, small shrimp 4.05±1.10%, and micro pellet 4.01 ± 1.20%. The total length and weight treated with trash fish were 5.40 ± 0.80 cm and 53±0,50 mg, respectively, while treaded with small shrimp were 4.80 ± 0.20 cm and 61±0.30 mg, and micro pellet were 4.54±0.56 cm and 48±0.40 mg, respectively. Keywords: seed, food type, growth, survival, golden trevally fish.

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PENGARUH HORMON ECDYSON TERHADAP SINTASAN DAN PERIODE MOULTING PADA LARVA KEPITING BAKAU Scylla olivacea

Jurnal Riset Akuakultur ◽

10.15578/jra.12.4.2017.335-339 ◽

2018 ◽

Vol 12 (4) ◽

pp. 335

Author(s):

Sutia Budi ◽

M. Yusri Karim ◽

Dody D. Trijuno ◽

M. Natsir Nessa ◽

Herlinah Herlinah

Keyword(s):

Survival Rate ◽

Economic Value ◽

Stocking Density ◽

Good Effect ◽

Mud Crab ◽

Crab Larvae ◽

South Sulawesi ◽

Post Spawning ◽

High Quality Seed ◽

Different Doses

Kepiting Bakau Scylla olivacea merupakan salah satu komoditas perikanan yang memiliki nilai ekonomis yang sangat tinggi. Kendala yang dihadapi dalam kegiatan perbenihan kepiting bakau adalah masih tingginya tingkat mortalitas. Tujuan penelitan untuk mengevaluasi pengaruh hormon ecdyson terhadap sintasan dan periode moulting pada larva kepiting bakau Scylla olivacea. Penelitian dilakukan di Unit Stasiun Pembenihan Kepiting Maranak Balai Riset Perikanan Budidaya Air Payau dan Penyuluhan Perikanan (BRPBAP3) Maros, Provinsi Sulawesi Selatan. Hewan uji berupa larva kepiting bakau Scylla spp. stadia zoea. Pakan uji dalam penelitian berupa rotifer dan Artemia yang dilakukan pengkayaan dengan hormon ecdyson. Wadah penelitian berupa akuarium 110 L berjumlah 12 buah yang diisi dengan air sebanyak 100 L, air bersalinitas 28-30 ppt dengan kepadatan larva sebanyak 50 ekor/L. Perlakuan yang diuji adalah berbagai dosis hormon ecdyson dalam pakan, yakni A= 0 mg/L; B= 0,5 mg/L; C= 1 mg/L; dan D= 1,5 mg/L; dengan tiga kali ulangan. Parameter yang diukur adalah sintasan dan periode moulting. Hasil penelitian menunjukkan bahwa perlakuan dosis hormon ecdyson memberikan pengaruh yang baik terhadap sintasan dan periode moulting larva kepiting bakau.Mud crab, Scylla olivacea is one of highly valued and sought-after fishery commodities. Despite its high economic value, mud crab culture still faces a problem in producing high-quality seed which is high mortality rate post-spawning. The study aim was to evaluate the effect of the Ecdyson hormone on the survival rate and molting period of the mud crab larvae. The study was conducted at the Maranak Crab Seedling, BRPBAP3 Maros, South Sulawesi Province. The trial used mud crabs larvae that were in zoea stage. The trial feed was given in the form of Rotifer and Artemia enriched with the Ecdyson hormone. Twelve 110-liter aquaria were filled with 100 L of 28-30 ppt of seawater. The stocking density of mud crab seed was 50 larvae/L. The treatments consisted different doses of Ecdyson hormone in the feed, i.e. A= 0 mg/L, B= 0.5 mg/L, C= 1 mg/L, and D= 1.5 mg/L, with three replications for each treatment. The parameters measured were survival rate and molting period. The results showed that the treatment of Ecdyson hormone doses gave a good effect on the survival rate and molting period of mud crab larvae.

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THE MASS SEED PRODUCTION OF GOLDEN TREVALLY FISH (Gnathanodon Speciosus Forsskal) WITH DIFFERENT FEED

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v6i2.9014 ◽

2015 ◽

Vol 6 (2) ◽

Author(s):

Tony Setia Dharma

Keyword(s):

Body Weight ◽

Survival Rate ◽

Seed Production ◽

Economic Value ◽

Stocking Density ◽

Fish Growth ◽

Food Type ◽

Larval Rearing ◽

Total Length ◽

Trash Fish

ABSTRACT Golden trevally fish is a prospective commodity that can be cultured and contains high economic value. The purpose of this study was to determine the best type of food for golden trevally fish growth. The larval rearing were conducted using concrete tanks with 6 m3 of volume. Three different food were used as treatments, i.e: (a) pellet micro, (b) small shrimp, and (c) trash fish. The start of experiment for larvae were reared for 30 days old. The stocking density of larvae was reared at 10 pc/l. Sampling of larvae were conducted every 7 days to measure of survival rate (SR), total length (TL) and body weight (BW). The larvae were reared with flowthrow system. At 70 days old, larvae were harvested and graded. The results showed that there was no significantly different among treatments (P>0.05) for survival rate, but the growth was significantly difference among treatments (P<0.05). The survival rate (SR) treated with trash fish was 5.38±1.20%, small shrimp 4.05±1.10%, and micro pellet 4.01 ± 1.20%. The total length and weight treated with trash fish were 5.40 ± 0.80 cm and 53±0,50 mg, respectively, while treaded with small shrimp were 4.80 ± 0.20 cm and 61±0.30 mg, and micro pellet were 4.54±0.56 cm and 48±0.40 mg, respectively. Keywords: seed, food type, growth, survival, golden trevally fish.

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PENGARUH PERBEDAAN PADAT TEBAR LARVA TERHADAP PERTUMBUHAN DAN SINTASAN PADA IKAN UCENG (Nemacheilus fasciatus)

BERITA BIOLOGI ◽

10.14203/beritabiologi.v18i2.3561 ◽

2019 ◽

Vol 18 (2) ◽

pp. 209-214

Author(s):

Jojo Subagja ◽

Vitas Atmadi Prakoso ◽

Otong Zenal Arifin ◽

Anang Hari Kristanto

Keyword(s):

Weight Gain ◽

Survival Rate ◽

Specific Growth ◽

Negative Impact ◽

Fish Larvae ◽

Survival Rates ◽

Stocking Density ◽

Larval Rearing ◽

Growth And Survival ◽

Length Gain

Proper stocking density on larval rearing of barred loach (Nemacheilus fasciatus Valenciennes, 1846) is very important in terms of obtaining the best growth and survival rate. This study was aimed to observe the growth and survival rate of barred loach subjected to different larval stocking density. Fish larvae were obtained by artificial spawning from in aquarium. Larvae were stocked on aquariums (50 × 40 × 30 cm) with three stocking density treatments (5, 10, and 15 individuals/L) and three replications. The experimental fish larvae were fed by Artemia and commercial feed (crude protein content: 30%) and feeding frequency twice per day (ad libitum). The length and weight were reassured every 10 days during 70 days of rearing period. Temperature, pH, and dissolved oxygen were measured at each treatment. Data obtained from measurements were analysed to assess the length gain, weight gain, specific growth rate (SGR), biomass gain, and survival rate. The results showed length gain of 3.35 ± 0.01, 2.94 ± 0.10, and 2.82 ± 0.15 cm and weight gain of 0.573 ± 0.023, 0.436 ± 0.018, and 0.417 ± 0.043 g in larval stocking density of 5, 10 and 15 individuals/L, respectively. Specific growth rates and biomass growth were of 6.22 ± 0.41, 5.93 ± 0.21, and 5.68 ± 0.41 %/day and 94.04 ± 5.39, 146.80 ± 3.81, and 167.24 ± 17.48 g in larval stocking density of 5, 10 and 15 individuals/L, respectively. Meanwhile, the survival rates obtained in this study were 89.13 ± 7.25, 93.13 ± 5.13, and 76.50 ± 3.54 % in larval stocking density of 5, 10 and 15 individuals/L, respectively. Increased stocking density has a negative impact on the growth and survival rate of barred loach.

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Utilization of Trash Fish for Cultivation of Crablet Mud Crab (Scylla serrata)

ILMU KELAUTAN Indonesian Journal of Marine Sciences ◽

10.14710/ik.ijms.25.3.110-114 ◽

2020 ◽

Vol 25 (3) ◽

pp. 110-114

Author(s):

Heppi Iromo ◽

Dori Rachmawani ◽

Abdul Jabarsyah ◽

Zainuddin Zainuddin

Keyword(s):

Carapace Width ◽

Survival Rates ◽

Scylla Serrata ◽

Mud Crab ◽

Growth And Survival ◽

Weight Growth ◽

Randomized Design ◽

Trichiurus Lepturus ◽

Trash Fish ◽

In The Wild

The high demand for mud crabs in North Kalimantan causes catch to increase in the wild. If it is not balanced with efforts to increase its aquaculture of mud crab, in the future there will be a decline in population. This study aims to determine the growth and survival rate of mud crab seed (crablet, Scylla serrata) in the application method of different types of trash fish. This research used a completely randomized design with 4 treatments and 3 replications. The Crablet used carapace width average 0.07-0.09 cm and weigh average 0.05-0.07 g with total 150 crablets. The treatments applied by trash fish were (A) Tilapia Fish (Oreochromis mossambicus), (B) Longfin Herrings Fish (Ilisha elongata), (C) Sword Fish (Trichiurus lepturus) and (D) Snails (Telescopium telescopium). The results were The best weight growth of crablet occurs in the treatment of T. lepturus (P>0.05) and the highest of survival rates of crablet were found in treatment T. telescopium (P<0.05) than the other. The trash fish were used turned out to be able survival of crablet mud crab (Scylla serrata).

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Water quality, growth and production performance of stinging catfish, Heteropneustes fossilis (Bloch) in cemented tanks with two different stocking densities

Bangladesh Journal of Zoology ◽

10.3329/bjz.v47i1.42026 ◽

2019 ◽

Vol 47 (1) ◽

pp. 107-119

Author(s):

Dulon Roy ◽

Abdullah Al Masud ◽

Pritam Kumar Saha ◽

MM Kutubuddin ◽

Md Muzahidul Islam

Keyword(s):

Water Quality ◽

Body Weight ◽

Survival Rate ◽

Stocking Density ◽

Culture Technique ◽

Production Performance ◽

Heteropneustes Fossilis ◽

Tank Culture ◽

Significant Difference ◽

T1 And T2

Attempt has been taken to develop intensive tank culture technique providing natural environment for Stinging catfish (Heteropneustes fossilis) inside tank to increase survival rate as well as production. The experiment was conducted for a period of 150 days in two tanks (T1 and T2) of 300 m2. Fish fries with a mean weight and length ranged from 1.02 to 2.2 g and 2.7 to 3.5 cm were stocked in T1 and T2, respectively. Stocking density of fingerlings were 1, 25,000 and 1, 50,000 per Ha in T1 and T2, respectively. Commercial pelleted feed was supplied to tank reared fish twice daily at a rate of 3-10% of body weight per day and later feeding rate was adjusted based on body weight by sampling. Important water quality parameters (temperature, DO, pH, transparency, ammonia and nitrate) were recorded weekly throughout the culture period. Survival rate was 87% and 84% in T1 and T2, respectively. Mean final weight were 41.73 ± 2.09g and 40.6 ± 0.90 g in T1 and T2, respectively. Length-weight relationship indicates that the growth rate was always higher in T1 followed by T2. Results showed that net yield was relatively higher in T2 (5115.35 ± 113.13 Kg/ha) than T1 (4537.12 ± 227.4 Kg/ha). In case of production, there was significant difference (p < 0.05) between two treatments. This experiment demonstrated the potential of H. fossilis production through new technique of tank culture system. However, more research is needed using local feed ingredients with higher stocking density. Bangladesh J. Zool. 47(1): 107-119, 2019

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