Articles

Found 14 Documents
Search

Stimulasi Molting dan Pertumbuhan Kepiting Bakau (Scylla sp.) Melalui Aplikasi Pakan Buatan Berbahan Dasar Limbah Pangan yang Diperkaya dengan Ekstrak Bayam

ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 15, No 3 (2010): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (216.922 KB)

Abstract

Ekstrak bayam mengandung fitoekdisteroid yang dikenal sebagai stimulan molting pada kepiting.  Selain melalui injeksi,  aplikasi  ekstrak  bayam  melalui  pakan  buatan  juga  terbukti  mampu  mempercepat  molting  dan pertumbuhan kepiting bakau.  Kendala yang dihadapi pakan buatan yang digunakan masih mahal karena berbahan dasar ikan dengan kandungan protein yang tinggi,  sehingga perlu diformulasi pakan buatan khusus kepiting yang berkualitas, murah dan ramah lingkungan, serta disukai oleh kepiting.  Tujuan dari penelitian ini untuk mengevaluasi pakan buatan berbahan dasar limbah pangan yang diperkaya ekstrak bayam yang dapat memberikan respon molting dan pertumbuhan terbaik pada kepiting, serta efisien di produksi dalam skala besar.  Empat pakan buatan dengan berbagai kadar protein (P) dan karbohidrat (K) digunakan pada penelitian ini, yaitu pakan A (46,84% P; 33,33% K), B (41,57% P; 38,29% K), C (35,62% P; 44,32% K), dan D (30,62% P; 49,13% K), sebagai kontrol pakan berbahan dasar non limbah. Selama penelitian, kepiting dipelihara secara individu dalam karamba yang di letakkan di tambak.   Hasil penelitian menunjukkan bahwa pakan D dengan kadar protein 30,62% dan karbohidrat 49,13%  serta diperkaya dengan ekstrak bayam (700 ng/g kepiting) memberikan hasil terbaik dalam menginduksi molting kepiting bakau.  Dapat disimpulkan, pakan buatan yang digunakan  sebaiknya mempunyai kadar nutrien yang seimbang dan merupakan campuran berbagai bahan baku pakan agar kandungan nutriennya saling melengkapi. Kata kunci : Ekstrak bayam, kepiting bakau, limbah pangan, molting, pakan buatan Spinach extracts contains phytoecdysteroid, a substance which is well known to stimulante molting in crabs. In addition through injection, artificial feed that contains spinach extract had been proven to accelerate molting and growth on mud crabs. The problem faced in utilizing the artificial feed is related to its expensive cost, since it’s mainly produced from fish based materials with a very high protein concentration. Thus, it is essential to formulate a special artificial feed for crabs which have a quality, inexpensive, environmentally friendly, and liked by the crabs. The purpose of this study was to evaluate artificial feed made from food waste enriched with spinach extracts, which can provide the best growth response and molting in crabs, as well as efficient to be produced in large scale. Four artificial diets with different protein levels (P) and carbohydrates (K) used in this study were feed A (P: 46,84%; K: 33,33%), B (P: 41,57%; K: 38,29%), C (P: 35,62%; K: 44,32%) and D (P: 30,62%; K: 49,13%), and as control is feed derived from non-waste materials. During the test, crab was culture individually in cages placed in ponds. The results showed that the feed D with 30,62% of protein and 49,13% of carbohydrates and enriched with spinach extract (700 ng/g crab), gives the best results in inducing molting of mud crabs. In conclusion, artificial feed should consist of a mixture of various raw materials, so that their nutrients can be balanced and complementary. Key words :  Spinach extract, mud crab, food waste, molting, artificial feed

Respon Molting, Pertumbuhan, dan Mortalitas Kepiting Bakau (Scylla olivacea) yang disuplementasi Vitomolt melalui Injeksi dan Pakan Buatan

ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 16, No 4 (2011): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (604.611 KB)

Abstract

Salah satu teknologi produksi kepiting cangkang lunak adalah menggunakan vitomolt untuk menstimulasi molting.  Penelitian bertujuan menganalisis respon molting, pertumbuhan, dan mortalitas kepiting bakau setelah diberikan vitomolt melalui injeksi dan pakan buatan. Penelitian dilaksanakan pada bulan Mei - Juli 2011, di Crabs Research Station yang terletak di Kabupaten Maros. Ada tiga perlakuan suplementasi vitomolt, yakni; secara tunggal melalui injeksi, kombinasi injeksi-pakan buatan, dan tanpa suplementasi vitomolt (kontrol), Hasil penelitian menunjukkan bahwa suplementasi vitomolt melalui injeksi dengan dosis 15 µg/g kepiting memberikan respon persentase molting tertinggi, yakni (84,00±5,48%), namun kombinasi injeksi (15 µg/g kepiting) dan pakan buatan (32.375 mg/kg pakan) memberikan respon molting yang lebih cepat.  Pada minggu kedua setelah perlakuan, kepiting yang molting pada perlakuan kombinasi adalah 14%, dibandingkan perlakuan lainnya, masing-masing 8% untuk perlakuan secara tunggal melalui injeksi dan 2% untuk kontrol.  Suplementasi vitomolt tidak memberikan pengaruh yang signifikan terhadap pertumbuhan setelah molting, namun memberikan pengaruh yang siginifikan pada mortalitas.  Mortalitas kepiting yang mendapat suplementasi vitomolt lebih rendah (6-8%) dibandingkan tanpa suplementasi vitomolt (24%). Kata kunci: vitomolt, injeksi, pakan buatan, kepiting cangkang lunak   One of the soft shell crab production technology is by application vitomolt to stimulate molting. The study aims to analyze the response of molting, growth, and mortality of mangrove crabs after being given vitomolt through injection and artificial feed. The experiment was conducted between May-July 2011, at Crabs Research Station in Maros Regency. There were two treatments of vitomolt and a control in this experiment, namely single treatment by injection, combination treatment by injection-artificial feed, and without vitomolt supplementation (control),  Results showed that supplementation of vitomolt through injection at a dose of 15 mg / g crab had highest percentage of molting (84.00 ± 5.48%), but a combination among injection (15 µg / g of crab) and artificial feed (32 375 mg / kg of feed) give faster molting response.  On the second weeks after treatment, there were 14% of crab had been molting in combination treatment, compared other treatments, respectively 8% for a single treatment by injection and 2% for control.  Vitomolt supplementation did not have a significant influence on growth after molting, but it gives a significant effect on mortality. Mortality of crabs that got vitomolt supplementation was lower (6-8%) compared without vitomolt supplementation (24%). Key words: vitomolt, Injection, artificial feed, soft shell crab

Mikroflora Saluran Pencernaan Ikan Gurame (Osphronemus gouramy Lacepede)

TORANI Vol 19, No 1 (2009)
Publisher : Fakultas Ilmu Kelautan dan Perikanan UNHAS

Show Abstract | Original Source | Check in Google Scholar | Full PDF (105.419 KB)

Abstract

The objectives of this experiment was to find out micro flora that have proteolitic and amylolytic activity in the intestine giant gouramy. Isolated in aerobe and anaerobe condition eighth Tripticase Soy Broth (TSB, Merck) as a culture medium added NaCl 1% with casein as an energy source for proteolitic and starch for amylolitic, pH 7 and incubation temperature 29ºC. Isolate purified is done with 102 to 1010 dilution series, than transfer to Tripticase Soy Agar (TSA). Identified pure isolate in a physiology and biochemistry manner. The intestine giant gouramy obtained 12 isolate consist 4 isolate aerob proteolitic microbe (Staphylococcus sp., Clostridium sp., Bacillus sp. and Moraxella sp.), 2 anaerob proteolitic microbe isolate (Nitrococcus sp. dan Aeromonas sp.), 3 aerob amylolitic microbe isolate (Mycobacterium sp. Lactobacillus sp. dan Aeromonas sp.), and 3 anaerob amylolitic microbe isolate (Carnobacterium sp., Citrobacter sp. and Streptococcus sp.). Key words: giant gouramy, microflora, microbe proteolitic, amylolitic, aerob, anaerob

Uji Fisik dan Kimiawi Pakan Buatan untuk Udang Windu Penaeus

TORANI Vol 19, No 2 (2009)
Publisher : Fakultas Ilmu Kelautan dan Perikanan UNHAS

Show Abstract | Original Source | Check in Google Scholar | Full PDF (91.066 KB)

Abstract

Using binder in producing artificial feed is significanly needs for water stability of feed. One of the feed binder using in producing shrimp feed is seaweed. The aims of the research is to evaluate the species of seaweed that has better effect as material for shrimp feed binder according to physical and chemical characteristic. The research design used Complete Randomized Design with four treatments and three replicates. The treatments consist of Eucheuma denticulatum, Kappaphycus alvarezii powder and commercial feed as control. Physical parameter of the feed was examined physical, include water stability of feed, hardness, homogenity, the droughning speed, atractant, and feed appetite. The chemical analizys of the feed including examine protein, lipid, and procsimate analysis were done. The result of physical and chemical analysis to the feed in term of variaty of seaweed species shown that the binder from seaweed has better result than artificial feed comercial shrimp. The species of seaweed, G. gigas is better result as binder in shrimp feed. The prosimate analisys has shown the nutrition contain in all feed has been examine, it still in range of tiger prawn.Keywords : Artificial feed, tiger prawn, binder, seaweed, physical dan chemical examine

Effectiveness of artificial diet enriched by spinach extract on molting stimulation to produce soft shell crab

Jurnal Akuakultur Indonesia Vol 10, No 1 (2011): Jurnal Akuakultur Indonesia
Publisher : Jurnal Akuakultur Indonesia

Show Abstract | Original Source | Check in Google Scholar | Full PDF (65.469 KB)

Abstract

Artificial feed is an alternative media applications spinach extract (EB) that is known to contain molting stimulant. However, utilization of the artificial feed is related to its expensive cost, with a very high protein concentration since its mainly produced from fish based materials, so need to be studied artificial feed formulation with substitution of vegetable material in stimulating molting and growth of mud crabs. Four formula artificial feed enriched EB (700 ng/g crab) used in this study were feed A (fish, crab shells, and cassava), feed B (fish, silage, shell crab, and cassava), feed C (fish, silage, shell crab, soy flour, and cassava), and feed D (fish, silage, shell crab, soy flour, corn starch, and pollard), trash fish and feed A without EB as control. During the test, mud crab intermolt phase was culture individually in crab box placed in pond. The results showed that the percentage of molting and weight growth in their respective in the feed A (44% and 41.96%); feed B (56% and 31.57%); feed C (74% and 23.20%); feed D (50% and 39.15%); trash feed control (24% and 50.66%); and feed A without EB (28% and 35.11%). An opposite phenomenon, where the feed C with the highest percentage of molting but with the lowest growth rate, the opposite occurs in the control of trash feed. This is apparently the effect of spinach extract as a stimulant molting, where performance can be optimized with a complete and balance nutrient composition. This prediction is supported by the analysis of protein content of crabs tested at the highest feed C treatment compared with the control feed. Key words: spinach extract, soft shell crab, molting, artificial feed, growth   ABSTRAK Pakan buatan merupakan alternatif media aplikasi ekstrak bayam (EB) yang diketahui mengandung stimulan molting.  Namun demikian, pakan buatan yang digunakan masih mahal dengan kandungan protein yang tinggi, karena berbahan dasar ikan, sehingga perlu dikaji formulasi pakan buatan dengan subtitusi berbagai bahan nabati  dalam menstimulasi molting dan pertumbuhan kepiting bakau.  Empat formula pakan buatan yang diperkaya EB (700 ng/g kepiting) digunakan pada penelitan ini, yaitu Pakan A (ikan, cangkang kepiting, dan ubi), Pakan B (ikan, silase, cangkang kepiting, dan ubi), Pakan C (ikan, silase, cangkang kepiting, tepung kedelai, dan ubi), dan Pakan D (ikan, silase, cangkang kepiting, tepung kedelai, tepung jagung, dan pollard). Pakan rucah dan pakan A tanpa EB digunakan sebagai kontrol.  Selama penelitian, kepiting bakau fase intermolt dipelihara secara individu dalam crab box yang diletakkan di tambak. Hasil penelitian menunjukkan persentase molting dan pertumbuhan bobot masing-masing pada Pakan A (44% dan 41,96%); Pakan B (56% dan 31,57%); Pakan C (74% dan 23,20%); Pakan D (50% dan 39,15%); kontrol pakan rucah (24% dan 50,66%); dan  pakan A tanpa EB (28% dan 35,11%).  Terjadi anomali, yaitu Pakan C dengan persentase molting tertinggi, tetapi dengan tingkat pertumbuhan terendah, namun terjadi sebaliknya pada kontrol pakan rucah. Hal ini diduga efek dari ekstrak bayam sebagai stimulan molting, dimana kinerjanya dapat dioptimumkan dengan komposisi nutrien lengkap dan seimbang.  Pendugaan ini didukung hasil analisis kadar protein kepiting uji pada perlakuan Pakan C tertinggi dibandingkan kontrol. Kata kunci: Ekstrak bayam, kepiting cangkang lunak, molting, pakan buatan, pertumbuhan

Quality of tiger shrimp artificial feed using various dosages of seaweed (Gracilaria gigas) meal as binder

Jurnal Akuakultur Indonesia Vol 10, No 1 (2011): Jurnal Akuakultur Indonesia
Publisher : Jurnal Akuakultur Indonesia

Show Abstract | Original Source | Check in Google Scholar | Full PDF (91.481 KB)

Abstract

The quality of an artificial feed particularly the stability of the feed in the water is highly determined by binding agents. The objective of this study was to determine the optimum dosage of seaweed, Gracilaria gigas meal as binder.  Completely randomized design was used in this study, with three dosages of sea weed meal as treatment feeds, i.e. 3, 6, and 9%, with three replications. The control feed was a commercial feed. The physical parameters measured were water stability, hardness level, homogeneity level, sinking rate, attractiveness, and palatability of the feed, and the chemical parameters were protein and lipid dispersion. Based on parameters of hardness level, homogeneity level, protein and lipid dispersion, feed used G. gigas meal of 9% was better than the commercial feed; parameters of sinking rate, attractiveness, and palatability with G. gigas of 9% was equal to the commercial feed; and based on parameters of water stability, the commercial feed was better than treatment feeds. However, when the three treatment feeds were compared, the 9% dosage of G. gigas meal was better than the other two dosages. Based on the results, the feed using seaweed, G. gigas meal of 9% was the best feed. Key words:  Artificial feed, binder, feed quality, G. gigas meal   ABSTRAK Bahan perekat sangat menentukan kualitas pakan buatan, terutama stabilitas dalam air.  Tujuan penelitian ini adalah untuk menentukan dosis tepung rumput laut, Gracilaria gigas yang terbaik sebagai bahan perekat. Penelitian didesain menggunakan rancangan acak lengkap, dengan tiga dosis tepung G.gigas, yaitu 3, 6, dan 9% yang diulang tiga kali.  Pakan komersial digunakan sebagai pakan kontrol.  Parameter fisik yang diukur adalah water stability (kecepatan pecah dan dispersi padatan), tingkat kekerasan, tingkat homogenitas, kecepatan tenggelam, daya pikat dan daya lezat pelet, sedangkan parameter kimiawi adalah dispersi protein dan lemak.  Berdasarkan parameter tingkat kekerasan, tingkat homogenitas, dispersi potein dan dispersi lemak pakan yang menggunakan binder tepung G. gigas 9% lebih baik dibanding dengan pakan komersial; parameter kecepatan tenggelam, daya pikat dan daya lezat pakan yang mengandung binder G. gigas 9% sama dengan pakan komersial; dan berdasarkan water stability, pakan komersial lebih baik dibanding dengan pakan yang menggunakan binder tepung rumput laut G. gigas. Namun bila ketiga pakan perlakuan dibandingkan, pakan dengan binder G. gigas 9% masih lebih baik dibanding dengan kedua pakan perlakuan lainnya.  Sesuai hasil penelitian ini, pakan yang menggunakan binder tepung rumput laut, G. gigas dengan dosis 9% adalah pakan terbaik. Kata kunci:  kualitas pakan, binder, tepung G. gigas, pakan buatan

Glycogen and proximate content of white shrimp fed on different carbohydrate level and feeding frequency

Jurnal Akuakultur Indonesia Vol 14, No 1 (2015): Jurnal Akuakultur Indonesia
Publisher : ISSA

Show Abstract | Original Source | Check in Google Scholar | Full PDF (2760.886 KB)

Abstract

ABSTRACT White shrimp Litopenaeus vannamei is one of penaeid shrimp which can be cultured either in traditional and advanced technology scale. One problem that commonly faced by pond farmer is the high price of feed with high protein content. This research was to identify the optimal level of carbohydrate and feeding frequency on glycogen deposit and chemical composition of white shrimp juvenile. Research used factorial completely randomized design with two factors in triplicates. Treatments were factor A, carbohydrate level in feed respectively A1 (30%), A2 (37%), A3 (44%), A4 (50%), and factor B daily feeding frequency respectively B1 (twice), B2 (four times), and B3 (six times) respectively. White shrimp used had an initial average body weight of 0.3 g/shrimp. Feeding level was 10% of shrimp body weight. Results showed that both factors, carbohydrate level in feed, feeding frequency and their interactions were not significantly different on glycogen deposit of white shrimp juvenile. Analysis result on chemical compositions of white shrimp juvenile consisted of protein, lipid, nitrogen-free extract, crude fiber, ash, and energy were generally increased after treatments. Keywords: glycogen deposit, feeding frequency, chemical composition, carbohydrate level ABSTRAK Udang vaname Litopenaeus vannamei merupakan salah satu jenis udang penaeid yang dapat dibudidayakan baik dalam skala teknologi tradisional maupun skala teknologi maju. Salah satu masalah yang dihadapi para petani tambak adalah tingginya harga pakan yang disebabkan karena tingginya kandungan protein pakan. Penelitian ini bertujuan untuk menguji efek pemberian pakan dengan kadar karbohidrat dan frekuensi pemberian berbeda terhadap deposit glikogen dan komposisi kimia tubuh juvenil udang vanamei. Penelitian menggunakan desain rancangan acak lengkap pola faktorial dengan dua faktor dan setiap faktor diberi masing-masing tiga ulangan. Perlakuan yang diuji adalah faktor A, kadar karbohidrat pakan berturut-turut A1 (30%), A2 (37%), A3 (44%), A4 (50%), dan faktor B, frekuensi pemberian pakan dalam sehari berturut-turut B1 (dua kali), B2 (empat kali), dan B3 (enam kali). Udang vaname yang digunakan memiliki bobot rata-rata 0,3 g/individu. Dosis pakan ditetapkan sebesar 10% dari bobot tubuh udang dengan frekuensi pemberian pakan disesuaikan dengan perlakuan. Hasil penelitian menunjukkan bahwa faktor level karbohidrat pakan, frekuensi pemberian pakan dan kombinasi keduanya tidak berpengaruh signifikan terhadap deposit glikogen juvenil udang vaname.  Hasil analisis terhadap komposisi kimia tubuh juvenil udang vaname meliputi protein, lemak, bahan ekstrak tanpa nitrogen (BETN), serat kasar, kadar abu dan energi secara umum mengalami peningkatan setelah diberikan perlakuan dibandingkan pada awal penelitian. Kata kunci: deposit glikogen, frekuensi pemberian pakan, komposisi kimia, level karbohidrat

KUALITAS LINGKUNGAN DAN AKTIVITAS ENZIM PENCERNAAN UDANG VANNAMEI (Litopenaeus vannamei) PADA BERBAGAI KONSENTRASI PROBIOTIK BIOREMEDIASI-Bacillus sp. (THE ENVIRONMENTAL QUALITY AND ENZYME ACTIVITIES OF DIGESTIVE VANNAMEI SHRIMP (Litopenaeus vannamei) ON VARIOUS CONCENTRATIONS OF BIOREMEDIATION-Bacillus sp. PROBIOTICS)

Fish Scientiae Vol 1, No 2 (2011): Fish Scientiae, Vol.1 No.2 Desember 2011
Publisher : Lambung Mangkurat University-Indonnesia

Show Abstract | Original Source | Check in Google Scholar

Abstract

Probiotik Bioremediasi-Bacillus sp. dengan komposisi bakteri yang menguntungkan, serta bekerja secara sinergis pada lingkungan budidaya dan pada saluran cerna inang. Selain, dapat memperbaiki kualitas lingkungan juga dapat meningkatkan aktivitas enzim pencernaan udang. Pada akhirnya menyebabkan peningkatan pertumbuhan dan memperkecil resiko timbulnya penyakit  pada udang.  Tujuan dari penelitian ini menentukan konsentrasi optimum aplikasi probiotik Bioremediasi-Bacillus sp.  dalam media budidaya udang vannamei.  Penelitian didesain dalam Rancangan Acak Lengkap (RAL) dengan 4 perlakuan konsentrasi probiotik Bioremediasi-Bacillus sp. yaitu kontrol (tanpa probiotik); 0,5; 1,0; 1,5 ppm per minggu, masing-masing dengan 3 ulangan.  Selama penelitian, udang uji dipelihara dalam akuarium kaca berkapasitas 30 L dengan kepadatan 4 ekor/L dan diberi pakan berbentuk powder dengan kadar protein 52% sebanyak 70-100% total biomassa.  Media air yang digunakan bersalinitas ± 30 ppt sebanyak 25 L.  Hasil penelitian menunjukkan terjadi perbaikan kualitas lingkungan budidaya pada perlakuan aplikasi probiotik, terutama kadar amoniak lebih rendah dibandingkan kontrol.  Kadar enzim pencernaan α-amilase dan protease juga meningkat signifikan dibandingkan kontrol.  Keadaan inilah yang menyebabkan sintasan dan pertumbuhan udang vannamei yang mendapat perlakuan pemberian probiotik lebih tinggi dibandingkan kontrol, sedangkan berbagai konsentrasi probiotik tidak menghasilkan respon perbedaan. Dapat disimpulkan aplikasi probiotik Bioremediasi-Bacillus sp. dengan konsentrasi 0,5 ppm per minggu dalam media budidaya dapat memperbaiki kualitas lingkungan budidaya dan aktivitas enzim pencernaan α-amilase dan protease, sehingga dapat meningkatkan sintasan dan pertumbuhan udang vannamei.Bioremediation-Bacillus sp. probiotics with the composition of the beneficial bacteria, as well as working synergistically on aquaculture and environment in the host gastrointestinal tract. In addition, it can improve the quality of the environment can also increase the activity of digestive enzymes shrimp. Ultimately lead to increased growth and minimize the risk of disease of shrimp. The purpose of this study to determine the optimum concentration of applications Bioremediation-Bacillus sp. probiotics vannamei shrimp culture in the media. The study was designed in a Completely Randomized Design (CRD) with 4 treatment concentration of bioremediation-Bacillus sp. probiotics the control (without probiotic), 0.5; 1.0, 1.5 ppm per week, with three replications each. During the study, the test shrimp rearing  in glass aquaria with a capacity of 30 L with a density of 4 fish / L and fed the form of powder with 52% protein content as much as 70-100% of total biomass. Water medium used ± 30 ppt salinity  as much as 25 L. The results showed improvement of environmental quality cultivation occurs in the probiotic treatment applications, particularly ammonia levels lower than controls. Digestive enzyme levels of α-amylase and protease also increased significantly compared to controls. This condition which cause the vannamei shrimp survival and growth were receiving higher than controls of probiotic treatment, while various concentrations of probiotic did not produce differences in response. Application of Bioremediation-Bacillus sp.  probiotics can be concluded with a concentration of 0.5 ppm per week in culture media can improve the quality of the environment cultivation and the activity of digestive enzymes α-amylase and protease, thus increasing the survival and growth of vannamei shrimp

Effects of Dosage of Mix.Microorganisms in Feed Raw Materials Fermentation Containing Sargassum sp. on Growth Performance, Chemical Body Composition and Hepatosomatic Index of Milkfish, Chanos chanos Forsskal

TORANI: Journal of Fisheries and Marine Science Vol 1, No 2 (2018)
Publisher : Marine Science and Fisheries Faculty, Hasanuddin University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (420.448 KB)

Abstract

Mixed microorganisms consist of bacteria, fungi, yeasts, and molds that produce important enzymes to ferment raw materials, thereby increasing the nutrient content of milkfish feed. This study aims to examine various doses of mix. microorganisms fermented raw materials on growth performance, chemical composition of the body, and hepatosomatic index of milkfish. Milkfish weighing 28.40 ± 0.11 g is kept in hapa of 1 m3 and placed on brackish water ponds. The test feed contains Sargassum sp. and formulated from raw materials fermented with mix. microorganism (control, 10, 15 and 20 mL / 100 g). The experimental results show the relative growth rate (%) and the growth of biomass (g) of milkfish fed with fermented feedstock with a dose of 10 mL / 100 g (122.77 ± 3.00%, and 522.05 ± 12.19 g ), the real feed is higher than the other dose. The fat content, crude fiber, and energy of test fish fed with fermented feedstock with 10, 15, and 20 mL / 100 g doses were significantly lower, while the hepatosomatic index was significantly higher than the control. (91.11-97,78%), protein content and NFE or Nitrogen Free Extracts (66.81 ± 0.41 72.33 ± 0.28% and 0.88 ± 0.38- 2.24 ± 0.92%), hepatic and muscle glycogen (7.16 ± 0.25-7.3 ± 0.31 mg / g and 6.16 ± 0.16, 6.51 ± 0.35 mg / g) were the same in all treatments. Thus, a dose of 10 mL / 100 g feed ingredients is the best dose in fermenting feed ingredients.Keywords: fermentation,  milkfish,  mix. microorganism, artificial feed, Sargassum sp.

Pengaruh Suhu terhadap Kelangsungan Hidup dan Percepatan Metamorfosis Larva Kepiting Bakau (Scylla olivacea)

Jurnal Perikanan Universitas Gadjah Mada Vol 17, No 2 (2015)
Publisher : Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

Kepiting bakau merupakan salah satu komoditas perikanan bernilai ekonomis penting di kawasan AsiaPasifik. Penelitian ini bertujuan untuk menentukan suhu optimal bagi pemeliharaan larva kepiting bakau (Scylla olivacea). Penelitian dilaksanakan di Balai Perikanan Budidaya Air Payau (BPBAP), Kecamatan Galesong, Kabupaten Takalar, Sulawesi Selatan. Hewan uji yang digunakan adalah larva kepiting bakau (S. olivacea) stadia zoea-1 yang ditebar dengan kepadatan 50 ekor/l dan dipelihara sampai memasuki stadia megalopa. Wadah penelitian menggunakan baskom plastik hitam berkapasitas 50 l diisi air media bersalinitas 30 ppt sebanyak 35 l yang dilengkapi dengan thermostat untuk mempertahankan suhu media percobaan. Pakan yang digunakan adalah pakan alami berupa rotifer dan nauplius Artemia dan pakan buatan berupa flake. Penelitian dirancang dengan menggunakan rancangan acak lengkap dengan 4 perlakuan dan masing-masing perlakuan mempunyai 3 ulangan. Keempat perlakuan yang dicobakan adalah perbedaan suhu media pemeliharaan larva kepiting bakau, yaitu : 26, 28, 30, dan 32oC. Hasil analisis ragam menunjukkan bahwa suhu media pemeliharaan berpengaruh sangat nyata (p < 0,01) pada tingkat kelangsungan hidup dan kecepatan metamorfosis larva kepiting bakau (S. olivacea). Tingkat kelangsungan hidup tertinggi dan perubahan metamorfosis larva kepiting bakau dari zoea ke megalopa tercepat dihasilkan pada suhu 30 oC yakni 31,60% dan 17 hari, sedangkan tingkat kelangsungan hidup terendah dan perubahan metamorfosis terlama pada suhu 26 oC yakni 18,89% dan 20,67 hari.