SUBTITUSI TEPUNG IKAN DENGAN TEPUNG KEONG MAS (Pomacea sp.) DALAM PAKAN PEMBESARAN IKAN KERAPU MACAN (Epinephelus fuscoguttatus)

Penelitian ini dilakukan untuk mendapatkan informasi tentang dosis optimum subtitusi tepung ikan dengan tepung keong mas dalam pakan pembesaran ikan kerapu macan. Ikan uji yang digunakan berupa gelondongan ikan kerapu macan berukuran bobot rata-rata 27,1 ± 1,38 g ditebar dalam keramba jaring apung ukuran 1 x 1 x 2 m3 dengan kepadatan 16 ekor/keramba. Perlakuan yang dicobakan adalah dosis tepung keong mas (GSM) dalam pakan yaitu: 0% (GSM0), 10% (GSM10), 20% (GSM20), 30% (GSM30), dan 40% (GSM40) dengan menurunkan kadar tepung ikan pakan. Unit penelitian diset dengan rancangan acak lengkap. Selama pemeliharaan, ikan diberi pakan uji secara satiasi selama 140 hari. Hasil penelitian menunjukkan bahwa ikan yang diberi pakan dengan kandungan tepung keong mas 0%—30% memiliki nilai laju pertumbuhan spesifik, pertambahan bobot, efisiensi pakan, efisiensi protein, dan retensi protein yang relatif sama (P>0,05), namun ikan yang diberi pakan dengan kandungan tepung keong mas sebanyak 40% memiliki nilai peubah tersebut yang berbeda nyata (P<0,05) lebih rendah dibandingkan yang diberi pakan dengan kandungan tepung keong mas 0%—10%. Konsumsi pakan dan sintasan ikan relatif sama di antara perlakuan (P>0,05). Berdasarkan hasil penelitian ini, maka tepung keong mas dapat digunakan hingga 30% dalam formulasi pakan ikan kerapu macan.This research was conducted to examine the effects of partially substitution of fish meal (FM) in the diets with golden snail meal (GSM) on growth performance of tiger grouper, Epinephelus fuscoguttatus. Fifteen net cages of 1 x 1 x 2 m3, each containing 16 tiger groupers with average initial weight of 27.1 ± 1.38 g, were set up randomly in seawater. Five isoprotein and isocaloric diets were formulated to contain 43.5% FM without GSM as control diet (GSM0); 10% GSM + 34.2% FM (GSM10); 20% GSM + 24.9% FM (GSM20), 30% GSM + 15.6% FM (GSM30); and 40% GSM + 6.3% FM (GSM40). The fish were fed twice daily to satiation for 140 days. The fish fed the diet containing 0%—30% GSM had not significantly different (P>0.05) specific growth rate, weight gain, feed efficiency, protein efficiency, and protein retention. However the fish fed the diet containing 40%GSM had significantly lower (P>0.05) value of the variables compared to the fish feed the diet containing 0%—10% GSM. Total feed intake and survival rate did not differ significantly (P>0.05) among treatments. This result suggests that GSM could be only used up to 30% to replace fish meal in the tiger grouper diets.

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PENGGUNAAN TEPUNG SILASE USUS AYAM DALAM PAKAN PEMBESARAN IKAN KERAPU MACAN, Epinephelus fuscoguttatus

Jurnal Riset Akuakultur ◽

10.15578/jra.1.1.2006.87-96 ◽

2016 ◽

Vol 1 (1) ◽

pp. 87

Author(s):

Rachmansyah Rachmansyah ◽

Usman Usman ◽

Naftali Kabangnga ◽

Makmur Makmur

Keyword(s):

Fish Meal ◽

Control Diet ◽

Partial Replacement ◽

Meal Protein ◽

Epinephelus Fuscoguttatus ◽

Tiger Grouper ◽

Inclusion Level ◽

Net Cage ◽

Biological Performance

Substitusi tepung ikan dengan tepung silase usus ayam dalam pakan telah dilakukan untuk mengevaluasi respon pakan terhadap keragaan biologi ikan kerapu macan, Epinephelus fuscoguttatus. Ikan uji diberi pakan yang mengandung tepung silase usus ayam pada level 0%, 5%, 10%, 15%, dan 20% sebagai pengganti tepung ikan dan dibuat dalam bentuk pelet basah. Pakan diberikan secara at satiation dua kali sehari selama masa pemeliharaan 20 minggu di keramba jaring apung berukuran 1 x 1 x 2 m. Penggantian tepung ikan dengan tepung silase usus ayam sampai 20% atau setara dengan 39% protein tepung ikan tidak berpengaruh nyata bila dibandingkan dengan perlakuan kontrol terhadap keragaan biologi ikan kerapu. Diduga tepung silase usus ayam cukup memadai sebagai pengganti tepung ikan dengan kadar lebih dari 20% dalam pakan pembesaran ikan kerapu macan jika asam amino methionine dan lysine ditambahkan ke dalam pakan.Feeding experiment was conducted to evaluate the effects of replacing fishmeal with poultry offal silage meal (POSM) in diet on biological performance of tiger grouper. Dietary inclusion level of PSOM at 5%, 10%, 15%, and 20% substitution of fish meal were compared with the fish meal based control diet (0% PSOM). Fish were fed diets (moist pellet) at satiation two times daily for 20 weeks rearing at a floating net cage of 1 x 1 x 2 m. The result showed that replacement of fish meal with POSM up to 20% or equivalent to 39% fish meal protein were not significantly different (P>0.05) compared with control diet on all of the biological performance of tiger grouper. From the result, we expected that POSM is suitable as a partial replacement of fish meal more then 20% in tiger grouper diet if methionine and lysine are added.

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FERMENTED BLOOD MEAL USE FOR TIGER GROUPER, Epinephelus fuscoguttatus GROW-OUT DIET

Indonesian Aquaculture Journal ◽

10.15578/iaj.2.1.2007.7-13 ◽

2007 ◽

Vol 2 (1) ◽

pp. 7

Author(s):

Usman Usman ◽

Kamaruddin Kamaruddin ◽

Neltje Nobertine Palinggi ◽

Taufik Ahmad

Keyword(s):

Growth Rate ◽

Weight Gain ◽

Specific Growth Rate ◽

Blood Meal ◽

Feed Efficiency ◽

Fish Meal ◽

Specific Growth ◽

Control Diet ◽

Fish Growth ◽

Tiger Grouper

The experiment aimed to evaluate the optimal level of fermented blood meal used in grow-out diets for tiger grouper, as an alternative protein source to fish meal. Juvenile tiger grouper, initial weight 31.1 ± 2.1 g, were stocked into 1 m x 1 m x 2 m floating net cages at 20 fish cage-1. The treatment applied was isoprotein and isocaloric diets formulated to contain fermented blood meal (FBM) of 0%, 7.5%, 15.0%, 22.5%, and 30.0% replacement of fish meal protein. The diets were fed to the fish twice a day to satiation for 20 weeks. Based on the Tukey test, the fish fed 0%–15.0% FBM demonstrated similar performance (P>0.05) to those fed the control diet (FBM0) in terms of specific growth rate, weight gain, and feed and protein efficiency. Specific growth rate, weight gain, feed efficiency and protein efficiency of the fish fed 22.5%–30.5% FBM were significantly lower (P<0.05) than those of the fish fed control diet (FBM0). However, there was a significant culvilinier decliner in overall fish performance with increasing inclusion of FPM and most notable for weight gain, feed efficiency and feed consumption. Based on regression analysis, the asymptote where fish growth deteriorates as a function of FBM inclusion was determined to be 8.9%. Tiger grouper diets incorporating up to 9% FBM as fish meal replacement had no adverse affects on fish growth and survival.

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Effect of L-Ascorbyl-2-Phosphate Magnesium as a Vitamin C Source in Different Doses on Growth of Patin Pangasius Hypophthalmus Fingerlings

Jurnal Akuakultur Indonesia ◽

10.19027/jai.5.21-29 ◽

2007 ◽

Vol 5 (1) ◽

pp. 21

Author(s):

D. Jusadi ◽

B.A. Dewantara ◽

I. Mokoginta

Keyword(s):

Vitamin C ◽

Feed Efficiency ◽

Optimum Dose ◽

Daily Growth Rate ◽

Daily Growth ◽

Protein Retention ◽

Isocaloric Diets ◽

Average Size ◽

Different Doses ◽

Phosphate Magnesium

This study was aimed to determine optimum dose of L-Ascorbyl-2-Phosphate Magnesium in the diet of patin, Pangasius hypophthalmus fingerlings. Five isoprotein and isocaloric diets containing different dose of L-Ascorbyl-2-Phosphate Magnesium, i.e. 0, 25, 75 and 100 mg/kg diet were used in this experiment. Fish with an average size of 5.00±0.11 g were maintained at a density of 15 fish per aquarium. Fish were fed three times a day at satiation, for 40 days. The results of study shows that vitamin C content in fish body increased as the vitamin C level of the diet increased. Similar pattern to vitamin C content was also found in protein retention, lipid retention, daily growth rate, and feed efficiency (p< 0.05). Thus, it can be concluded that the most optimum dose of L-Ascorbyl-2-Phosphate Magnesium as vitamin C source for patin fingerlings in this experiment was 100 mg Vit C/kg diet. Higher dose of L-Ascorbyl-2-Phosphate Magnesium than 100 mg/kg diet however need to be further verified. Keywords: vitamin C, patin, Pangasius hypophthalmus. ABSTRAK Penelitian ini bertujuan untuk menentukan kadar optimum L-Ascorbyl-2-Phosphate Magnesium dalam pakan ikan patin, Pangasius hypophthalmus ukuran sejari. Lima macam pakan isoprotein dan isokalori mempunyai kandungan L-Ascorbyl-2-Phosphate Magnesium berbeda, berturut-turut 0, 25, 50, 75 dan 100 mg/kg pakan telah digunakan dalam penelitian ini. Benih berukuran rata-rata 5,00±0,11 g dipelihara dalam akuarium dengan kepadatan 15 ekor per akuarium. Ikan diberi pakan tiga kali sehari, secara at satiation, selama 40 hari. Hasil penelitian menunjukkan bahwa kadar vitamin C tubuh meningkat sejalan dengan kadar vitamin C pakan. Demikian pula retensi protein, retensi lemak laju pertumbuhan harian, efisiensi pakan mengikuti pola yang sama seperti kandungan vitamin C tubuh (p<0,05). Dengan demikian dapat disimpulkan bahwa kadar vitamin C L-Ascorbyl-2-Phosphate Magnesium terbaik dalam pakan ikan patin adalah 100 mg/kg pakan, namun perlu diteliti lebih lanjut kadar L-Ascorbyl-2 Phosphate Magnesium yang lebih tinggi dari 100 mg/kg pakan. Kata kunci: vitamin C, ikan patin, Pangasius hypophthalmus.

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VACCINATION OF JUVENILE TIGER GROUPER WITH THREE INACTIVATED BACTERIAL PATHOGENS

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v7i2.11030 ◽

2016 ◽

Vol 7 (2) ◽

Author(s):

. Zafran

Keyword(s):

Bacterial Infection ◽

Sea Water ◽

Control Fish ◽

Bacterial Disease ◽

Bacterial Vaccine ◽

Total Length ◽

Photobacterium Leiognathi ◽

Epinephelus Fuscoguttatus ◽

Tiger Grouper ◽

Net Cages

An experiment to evaluate the efficacy of inactivated polyvalent bacterial vaccines to increase specific immunity of tiger grouper (Epinephelus fuscoguttatus) against bacterial infection was conducted in floating net cages located in Sumbawa Island, West Nusa Tenggara. Polyvalent bacterial vaccine was prepared by mixing three species of killed-bacteria (Vibrio harveyi, V. alginolyticus, and Photobacterium leiognathi) with ratio of 1:1:1. The density of bacterial vaccine was adjusted at 1010 CFU/ml. The vaccines were delivered by immersion. The control fish were immersed in sea water without vaccine. Fish with ± 6 cm of total length and ± 7 g of body weigth were used in this experiment. The fishes were reared in concrete tanks in hatchery of Gondol, Bali until they reached ± 9 cm of total length. Later, the fishes were reared for 6 months in floating net cages located in Sumbawa. Re-vaccinations were delivered 60 days and 120 days post initial vaccination. The results showed that titer antibody and survival rate of the vaccinated fish were 1/128 and 77.11%, higher than the control (titer antibody=1/4-1/8, survival=45.56%, respectively). The relative percent survival of the vaccinated fish was 57.95%. It was suggested that the vaccines were immunogenic and had protective ability against bacterial infection in tiger groupers. Keywords: bacterial disease, polyvalent bacterial vaccine, tiger grouper

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Substituting Fish Meal with Pre-Treated Lima Bean Meal on Growth, Feed Utilization and Nutrient Retention in Clarias Gariepinus Fingerlings Reared in Hapa-in-Pond System

Global Journal of Science Frontier Research ◽

10.34257/gjsfrdvol19is5pg9 ◽

2019 ◽

pp. 9-17

Author(s):

Paulin Nyadjeu ◽

Hapsatou Alim ◽

Justin Djimbie Djopnang ◽

Achare Elvis Ayamba ◽

Minette Eyango Tabi-Tomedi

Keyword(s):

Rural Areas ◽

Fish Meal ◽

Control Diet ◽

Clarias Gariepinus ◽

Nutrient Retention ◽

Lima Bean ◽

Feed Utilization ◽

Protein Retention ◽

Significant Difference ◽

Bean Meal

The present study was conducted during 56 days to evaluate the effect of substituting fish meal (FM) with pre-treated Lima bean meal (LBM) on growth, feed utilization, and nutrient retention in Clarias gariepinus fingerlings weighing 3.00±0.02g. Four isonitrogenous (40% crude protein) diets containing 0% (D0), 25% (D25), 50% (D50) and 100% (D100) of LBM, as FM substitute were used. D0 was considered a control diet. The results obtained indicate no significant difference in weight gain (11.97±0.67g and 12.95±2.12g), specific growth rate (3.46±0.23%/day and 2.95±0.22%/day), protein efficiency ratio (0.89±0.01 and 1.05±0.02), protein retention (10.83±0.23% and 12.48±0.19%) and lipid retention (9.11±0.55% and 9.45±0.43%) of fish fed D0 and D100 respectively. Fish fed D25 and D50, showed significant growth increase, feed utilization performances, and both protein and lipid retention in comparison with D0 and D100. This study indicates that Lima bean meal can be used up to 50% in formulating feed for Clarias gariepinus fingerlings in rural areas.

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PERKIRAAN PADAT PENEBARAN IKAN KERAPU MACAN (Epinephelus fuscoguttatus) YANG OPTIMUM BERDASARKAN PADA KEBUTUHAN OKSIGEN TERLARUT

Jurnal Riset Akuakultur ◽

10.15578/jra.2.3.2007.341-347 ◽

2016 ◽

Vol 2 (3) ◽

pp. 341

Author(s):

Arif Dwi Santoso

Keyword(s):

Dissolved Oxygen ◽

Current Velocity ◽

Stocking Density ◽

Environmental Parameters ◽

Inflow Rate ◽

Stocking Rate ◽

Epinephelus Fuscoguttatus ◽

Tiger Grouper ◽

Aquaculture Area ◽

Net Cages

Studi tentang perkiraan padat penebaran optimum pada ikan kerapu macan (Epinephelus fuscoguttatus) berdasarkan pada kebutuhan oksigen terlarut telah dilakukan pada areal Teluk Hurun, Lampung pada bulan Juli 2003. Rata-rata hasil pengukuran kualitas lingkungan keramba jaring apung 13,5 m3 yang berisi ikan kerapu macan meliputi oksigen terlarut 3,68—6,76 (5,35 ± 0,25) mg/L suhu air 28,64—29,72 (29,09 ± 0,09) oC. Salinitas 32,69—33,0 (32,94 ± 0,13) psu and turbiditas 0,27—13,62 (1,15 ± 0,41) NTU. Data tambahan meliputi laju pemasukan air sungai sekitar 0,02 m3/detik dan kecepatan arus 2,3—5,1 cm/detik. Dari analisis data laju respirasi ikan kerapu macan yang diukur dengan mengunakan fish chamber menghasilkan fungsi korelasi terhadap bobot badan ikan yaitu Y= 0,0038 + 0,6108 dengan R2= 0,7437 dan fungsi padat penebaran yang optimum yaitu Y= 1505,6 X -0.632; R2= 0,7419. Dari kedua fungsi tersebut didapatkan rekomendasi penentuan padat penebaran yang optimum berdasarkan kebutuhan oksigen terlarut dengan batasan sebagai berikut: stok ikan berukuran kurang dari 50 g disarankan ditebar dengan kepadatan 175 ekor/m3, ikan ukuran 100--200 g sekitar 63 ekor/m3 dan ikan ukuran lebih dari 1.200 g sekitar 17 ekor/m3.Study on the optimum stocking rate estimation on tiger grouper (Epinephelus fuscoguttatus) base on dissolved oxygen budged was held in aquaculture area Hurun Bay Lampung in July 2003. Environmental parameters of Hurun Bay estuary were monitored at the site of 13.5 m3 floating net cages for E. fuscoguttatus in July 2003. Average dissolved oxygen inside cages was 3.68—6.76 (5.35 ± 0.25) mg/L with water temperature 28.64—29.72 (29.09 ± 0.09) oC. Salinity 32.69—33.0 (32.94 ± 0.13) psu and turbidity 0.27—13.62 (1.15 ± 0.41) NTU. Inflow rate of cages was 0.02 m3/sec with current velocity 2.3—5.1 cm/s. Results showed that the functions of respiration rate for correlation between respiration of E. fucoguttatus and their weight was Y= 0.0038x + 0.6108 with R2= 0.7437 meanwhile the functions of optimum stocking density was Y= 1505.6 X -0.632, R2= 0.7419. On basis of dissolved oxygen budged, estimated optimum stocking density for lower limit was 175 ind./m3 for fish 50 g in average, 63 ind./m3 for fish 100--200 g and 17 ind./m3 for fish up to 1,200 g.

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Inhibition test of mangosteen peel extract (Garcinia mangostana L.) against bacterial diseases of tiger grouper (Epinephellus fuscoguttatus)

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/869/1/012071 ◽

2021 ◽

Vol 869 (1) ◽

pp. 012071

Author(s):

Y Akmal ◽

R Humairani ◽

M Muliari ◽

I Irfannur ◽

R Rinaldi ◽

...

Keyword(s):

Bacterial Disease ◽

Garcinia Mangostana ◽

Bacterial Diseases ◽

Mangosteen Peel ◽

Randomized Design ◽

Epinephelus Fuscoguttatus ◽

Tiger Grouper ◽

Net Cages ◽

Positive Results ◽

Peel Extract

Abstract Cultivation of tiger grouper (Epinephelus fuscoguttatus) in Floating Net Cages in several locations in Bireuen Regency has developed. The potential disease issue can be caused by bacteria, viruses, fungi, or parasites. The purpose of this study was to determine the effectiveness of mangosteen peel extract capsules (Garcinia mangostana L) against bacterial disease in tiger grouper. This research was carried out in April 2019 at the MIPA Laboratory of Al Muslim University and the laboratory of PT. Centra Proteina Prima, Bireuen Regency. The design used was a completely randomized design with four treatments (0%, 10%, 20%, and 30% mangosteen peel extract capsules) with three replications. The parameters studied in this study including the diameter of the inhibition and the observation of MBC (Minimum Bacterial Concentration). The result showed that the administration of mangosteen peel extract capsules with doses of 10%, 20%, and 30% has no significant effect on reducing disease-causing bacteria in grouper grown on TSA media. Positive results were obtained on positive (+) MBC observations, presumably due to the small dose of mangosteen peel extract capsules given so that it could not kill bacteria grown in dishes with an inhibition range of 0 mm.Introduction

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Dietary Inclusion of Fermented Parkia in Feeds as an Organic Strategy to Improve Feed Quality and Antioxidant Parameters of African Catfish (Clarias gariepinus) Fingerlings

Asian Journal of Biotechnology and Bioresource Technology ◽

10.9734/ajb2t/2019/v5i330059 ◽

2019 ◽

pp. 1-14

Author(s):

J. Abafi ◽

M. Aliyu-Paiko ◽

K. M. Adamu ◽

M. A. King

Keyword(s):

Growth Performance ◽

Feed Efficiency ◽

Control Diet ◽

Clarias Gariepinus ◽

Starter Culture ◽

Dietary Treatment ◽

African Catfish ◽

Fish Feed ◽

Crude Fibre ◽

Feed Quality

Aim: The aim of this study is to assess fermented parkia infusion in feed as organic strategy to improve feed quality and immune system of African catfish (Clarias gariepinus) fingerlings. Place and Duration of Study: Department of Biochemistry, Ibrahim Badamasi Babangida University, Lapai, Niger State, Nigeria, between 1st January 2017 and 25th March 2017. Methodology: In the present study, feed ingredients were fermented for 72 hrs with probiotic starter culture from Parkia biglobosa (TF diet) in comparison to a control diet with similar ingredients to the experimental diets but totally unfermented (CF diet) and used to make feed pellets. The experimental feeds were fed at 5% of body weight of each dietary treatment to triplicate groups of 20 fish per tank (100 Liter capacity), two times daily for 10 weeks. Proximate composition and mineral content of diets and whole fish, Feed efficiency, growth performance and Biochemical parameters of the fish were evaluated. Results: The result of proximate compositions of experimental diets revealed a significantly higher protein and ash contents in TF compared to the CF. Carbohydrate content was significantly lower in TF diet while crude fibre, moisture and fat contents were not significantly higher in CF compared to TF. The highest values of some minerals such as sodium (Na), potassium (K), phosphorus (P) and magnesium (Mg) were also recorded in the TF while the least was recorded in CF. The result of feed efficiency and growth performance indicated similar feed acceptance and intake between fish fed the fermented diet and the control. The activities of serum antioxidant enzymes activities of superoxide dismutase and catalase were significantly (P < 0.05) higher in serum of fish fed TF compared to that in fish fed CF diet. Conclusion: It can be deduced from this study that the fermented diet improved the immunity of fish and does not adversely affect the growth performance.

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ANALISIS FINANSIAL PRODUKSI YUWANA KERAPU MACAN (Epinephelus fuscoguttatus ) DENGAN PAKAN PELET KOMERSIAL DAN IKAN RUCAH DALAM KERAMBA JARING APUNG

Jurnal Perikanan Universitas Gadjah Mada ◽

10.22146/jfs.9070 ◽

2005 ◽

Vol 7 (2) ◽

pp. 144

Author(s):

Tatam Sutarmat

Keyword(s):

Body Weight ◽

Financial Analysis ◽

Body Weight Gain ◽

Fish Feed ◽

Feed Conversion ◽

Total Length ◽

Trash Fish ◽

Net Profit ◽

Epinephelus Fuscoguttatus ◽

Tiger Grouper

This study aimed to evaluate financial analysis of fingerling production of tiger grouper (Epinephelus fuscoguttatus) fed commercial pellet and trash fish. The experiment was carried out in floating net cages located in the Gondol Research Institute for Mariculture Bali. A total of 3,000 humpback grouper juveniles with the average body weight of 12 g and 8 cm of total length, were stocked in six 2x2x2 m cages at stocking densities of 500 fishes/cage. The cages were divided in two groups for two treatments in triplicates. The treatments were feeding with commercial pellet and copper raw trash fish. Results showed that body weight gain, total length, specific growth rate, were not significant different (P>0.05) between fish fed commercial pellet and trash fish. Feed conversion ratios obtained by commercial pellet and trash fish were 1.43 and 4.53, respectively. Survival rates were significant different (P<0.05) between fish fed commercial pellet and trash fish which were 83.33 and 69.86%, respectively. Nursering for production of tiger grouper fingerling fed either commercial pellet or trash fish in floating net cage were economically feasible. Feeding with commercial pellet gave a higher net profit of Rp 4,486,250.- with the RC ratio of 1.47 and rentability of 47.12%, while feeding with trash fish gave a net profit of Rp 3,212,500.- with the RC ratio of 1.37 and rentability of 37.35%.This study aimed to evaluate financial analysis of fingerling production of tiger grouper (Epinephelus fuscoguttatus) fed commercial pellet and trash fish. The experiment was carried out in floating net cages located in the Gondol Research Institute for Mariculture Bali. A total of 3,000 humpback grouper juveniles with the average body weight of 12 g and 8 cm of total length, were stocked in six 2x2x2 m cages at stocking densities of 500 fishes/cage. The cages were divided in two groups for two treatments in triplicates. The treatments were feeding with commercial pellet and copper raw trash fish. Results showed that body weight gain, total length, specific growth rate, were not significant different (P>0.05) between fish fed commercial pellet and trash fish. Feed conversion ratios obtained by commercial pellet and trash fish were 1.43 and 4.53, respectively. Survival rates were significant different (P<0.05) between fish fed commercial pellet and trash fish which were 83.33 and 69.86%, respectively. Nursering for production of tiger grouper fingerling fed either commercial pellet or trash fish in floating net cage were economically feasible. Feeding with commercial pellet gave a higher net profit of Rp 4,486,250.- with the RC ratio of 1.47 and rentability of 47.12%, while feeding with trash fish gave a net profit of Rp 3,212,500.- with the RC ratio of 1.37 and rentability of 37.35%.

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KANIBALISME PADA YUWANA IKAN KERAPU MACAN (Epinephelus fuscoguttatus) DALAM KONDISI PEMELIHARAAN SECARA TERKONTROL

Jurnal Riset Akuakultur ◽

10.15578/jra.1.2.2006.245-254 ◽

2006 ◽

Vol 1 (2) ◽

pp. 245

Author(s):

Eri Setiadi

Keyword(s):

Mass Production ◽

Culture System ◽

Economic Value ◽

Size Variation ◽

Intensive Culture ◽

Epinephelus Fuscoguttatus ◽

Tiger Grouper ◽

Set Up ◽

Starvation Experiment

Ikan kerapu macan (Epinephelus fuscoguttatus) merupakan ikan yang memiliki nilai ekonomi penting sebagai komoditas ekspor dan telah berhasil dibudidayakan di Indonesia. Kendala yang dihadapi dalam budi daya ikan tersebut yaitu masih tingginya tingkat kanibalisme pada pemeliharaan secara intensif. Tujuan penelitian ini adalah untuk mengetahui frekuensi gigitan, menelan, dan mortalitas pada pemeliharaan yuwana ikan kerapu macan dan upaya pengendaliannya. Penelitian ini terdiri atas dua tahap, yaitu penelitian variasi ukuran yang dipuasakan (Penelitian I) dan variasi ukuran dengan kepadatan jembret yang berbeda (Penelitian II) terhadap terjadinya kanibalisme, seperti frekuensi gigitan, menelan, dan mortalitas telah dilakukan. Ukuran yuwana kerapu macan yang digunakan sebagai hewan uji terdiri atas tiga ukuran, yaitu ukuran kecil, sedang, dan besar. Hasil penelitian I menunjukkan bahwa ada perbedaan (P<0,0001) di antara perlakuan terhadap frekuensi gigitan, menelan, dan mortalitas. Penelitian II menunjukkan juga adanya perbedaan (P<0,0006) di antara perlakuan terhadap frekuensi gigitan, menelan dan mortalitas. Kepadatan jembret 1.000 individu/L dapat mengurangi kanibalisme.Tiger grouper, E. fusoguttatus is one of the marine finfish species have a high economic value as an export commodity in Indonesia. Mass production of this species has largely been successful in Indonesia. However, cannibalism is a main problem can be reduced mass production during in an intensive culture system. The aim of this experiment is to examine frequency of bitting and swallowing, mortality, and its control. This experiment was focused on size variation and mysid density that affect on frequency of bitting, frequency of swallowing, and mortality. The fry of tiger grouper used in this experiment was consisted of three sizes (small, medium, and big). Two kinds of experiments were set up namely size variation and starvation (experiment I) and size variation and mysid density (experiment II). The result showed that size variation indicated that significantly different (P<0.0001) in frequency of bitting and swallowing, and mortality and also mysid density could affect the frequency of biting and swallowing, and mortality (P<0.0006) among the treatments. Mysid density (1,000 individu/L) could be reduced the cannibalism.

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