Istiyanto Samidjan
Program Studi Budidaya Perairan, Jurusan Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

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Pengaruh Persentase Jumlah Pakan Buatan Yang Berbeda Terhadap Pertumbuhan dan Kelulushidupan Keong Macan (Babylonia spirata L.) Fransiska, Fransiska; Rachmawati, Diana; Samidjan, Istiyanto
Journal of Aquaculture Management and Technology Vol 2, No 4 (2013) : Journal of Aquaculture Management and Technology
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Spettedbabylon(Babylonia spirata L.) is a member of gastropod species are important economic value, so the potential for propagation. Cultivation begins with the discovery of artificial feed derived from fish meal and flour of green mussels as a source of animal protein to feed artificial leopard slugs. Green mussel (Perna viridis) is known as a cheap source of animal protein and rich in essential amino acids (arginine, leucine, lysine). In addition, mussels flour can be substituted in place of fish meal that can be used as an artificial feed. This study aimed to determine the effect of feeding with a different percentage of the amount of feed and figure out the percentage of feed that gives the best effect for growth, and survival spettedbabylon. The material used is a spettedbabylon(Babylonia spirata L.) with an average weight of 15.81 ± 0.02 g / fish originating from Jepara waters. Spettedreared in a plastic container with a basket volume 4 liters of water with 2 stocking density tail / liter, so that each unit there are 8 tails maintenance / container. Test feed is feed-shaped pasta made with flour protein content of 35% green mussels as a source of animal protein. The method used is performed using experimental laboratory methods. Completely Randomized Design (CRD) that is 3 treatments and 3 replications. A treatment (percentage of feed 3%), B (percentage of feed 5%), C (percentage of feed 7%). Data were analyzed using analysis of variance followed by Duncans test. This study was conducted in November 2011 s / d in February 2012 in BBPBAP Jepara, Central Java. The results showed that the percentage of different artificial feed on snails tiger (Babylonian spirata L.) significantly (P <0.05) on the specific growth rate (SGR), Protein Efficiency Ratio (PER), was highly significant(P <0.01) on the efficiencyof feed utilization(EPP), but no significant effect on survival (SR) leopard slug. Treatment A (3%) give the best effect on SGR (0.09 ± 0.02), SR (95.83 ± 7.22) PER (32.84 ± 06,40), EPP (2.50 ± 0, 40) and SR (7.22 ± 95.83). Water quality is still within the normal range for tiger snail farming activities with the 26.9-30o temperature, salinity 31-32 ppt, pH 7-8, DO from 3.9 to 4 mg / liter undetectable ammonia, nitrate and nitrite 0.005 0.011.
Pengaruh Perbedaan Dosis Pakan Keong Mas Dan Ikan Rucah Pada Kepiting Bakau.(Scylla paramamosain) Terhadap Pertumbuhan dan Kelulushidupan Dengan Sistem Battery di Tambak Tugu, Semarang Sadinar, Bintang; Samidjan, Istiyanto; Rachmawati, Diana
Journal of Aquaculture Management and Technology Vol 2, No 4 (2013) : Journal of Aquaculture Management and Technology
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Mud crab is one of the marine living resources of high economic value, occupants biota type has been commercially cultivated in many tropical countries. Mud crabs are well known in the domestic market and abroad as a tasty meat flavor and high nutritional value which contains many important Nutrients such as minerals and fatty acids. The material used is a mud crab (Syilla paramamosain) with an average weight of 100 grams were 36 tails. The method used was experimental methods carried out in the field, using a completely randomized design (CRD). The treatment is given in the form of feeding snails with a dose of 3%, 5%, 7%, and 5% trash fish. Respectively for treatments A, B, C, and D, with 3 replications. The results showethat the dose of different feed snails provide a significant influence on the growth of absolute and specific growth rate of mangrove crabs, but give no significant effect on survival growth of mud crab. Mud crab highest absolute weight gained from treatment C (116.60±0.06 g), and then treatment D (112.67±0.471 g), treatment B (112.08±0.273 g), and the treatment of A (108.63±0.27 g), while the value of survival was 85.19%, 96.30%, 100%, and 85.19% , each on treatment A, B, C, and, D. Water quality are still in a decent range for maintenance of mud crab.
Pemberian Kombinasi Pakan Keong Macan Dan Ikan Rucah Terhadap Pertumbuhan Dan Kelulushidupan Kepiting Bakau (Scylla paramamosain) Asyhariyati, Anis Idha; Samidjan, Istiyanto; Rachmawati, Diana
Journal of Aquaculture Management and Technology Vol 2, No 4 (2013) : Journal of Aquaculture Management and Technology
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In the cultivation of mangrove crab feed is a great operational capital in cultivation beyond the provision of seedlings. For that feed used must be able to act as efficient as possible, so that it can push the cost minimal feed without reducing the level of maximum production. This research aims to know the combination effect of feed the babylon snail and trash fish to theg growth and survival mangrove crab (Scylla paramamosain). This research was carried out in April until Juni 2012 at the farming village of Tugurejo, Mangkang, Semarang District. Animal test used is the mangrove crab with average initial weight of 100 grams. Feed The babylon snail and trash fish. experimental method uses that take place in the field with a randomized Complete Design (RAL), namely 3 and 3 treatment of Deuteronomy. The treatment A (feed The babylon snail), B (trash fish), C (feed combination The babylon snail and trash fish). The variables measured growth (SGR), the utilization of the feed (EPP, PER) and SR, as well as water quality. The results showed a combination feed the babylon snail and fish test rucah fresh gives but has no effect the real influence (P<0,05) against SGR, PER, EPP and SR mangrove crab.
AGENSIA PENYEBAB PENYAKIT BAKTERI PADA KEPITING BAKAU (Scylla paramamosain) YANG BERASAL DARI DEMAK Burhan, Muhammad; Sarjito, -; Samidjan, Istiyanto
Journal of Aquaculture Management and Technology Vol 3. No 2 (2014): Journal of Aquaculture Management and Technology
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Penelitian ini bertujuan untuk mengetahui gejala klinis yang disebabkan penyakit bakterial, jenis bakteri yang menginfeksi kepiting bakau dan mengetahui agensia penyebab penyakit bakterial yang bersifat pathogen pada kepiting bakau (S. paramamosain) yang berasal dari Demak. Pengambilan sampel menggunakan metode purposive sampling pada 20 ekor kepiting bakau dengan panjang karapas 10,53±1,2 cm. Berdasarkan gejala klinis terdapat 5 kepiting yang terinfeksi oleh penyakit bakterial. Isolasi bakteri menggunakan metode pour plate dengan pengenceran 10-1 sampai 10-5 pada luka, insang, hepatopankreas kemudian ditanam sebanyak 1 ml ke cawan petri. Isolasi dari haemolymph diambil sebanyak 0,1 ml kemudian ditanam pada media Zobell, GSP, dan TCBS. Uji postulat Koch dilakukan terhadap keenam isolat terpilih pada 9 ekor kepiting dengan dosis 108 CFU/ml sebanyak 0,2 ml pada kaki renang. Pengamatan gejala klinis dan kematian dilakukan selama 168 jam setelah peyuntikkan. Karakterisasi agensia penyebab penyakit dilakukan secara morfologi dan biokimia. Hasil penelitian menunjukkan gejala klinis yang terdeteksi antara lain adanya luka dan warna coklat kemerahan (melanosis) pada karapas, karapas berwarna gelap, bagian abdomen menghitam, terdapat bintik putih. Berdasarkan uji postulat Koch keenam isolat tersebut dapat menyebabkan kematian 100% terhadap kepiting uji. Hasil karakterisasi secara morfologi dan biokimia keenam isolat agensia penyebab penyakit adalah Vibrio parahaemolyticus (SJ.D 2), V. alginolyticus (SJ.D 4), V. ordalii (SJ.D 9), V. harveyi (SJ.D 12), Aeromonas hydrophila (SJ.D 16) dan Pseudomonas aeruginosa (SJ.D 17). Keenam isolat bakteri bersifat pathogen karena mampu menyebabkan kematian dikondisi kepiting yang dipelihara pada kualitas air yang baik. The aims of this research for to know clinical sign was caused by bacterial disease, type of bacteria that are infected mud crabs and discovering causative agent of bacterial disease in the mud crab (S. paramamosain) from Demak. The sampling method used purposive sampling in 20 mud crabs with length of carapace approximately 10,53±1,2 cm. Based from clinical sign there are 5 mud crabs was suspected with infected by bacterial disease. The methode of bacterial isolated  used pour plate methode with dilution 101 up to 105 from ulcher, gill, hepatopancreas then planted as much as 1 ml in petridish. Isolation of haemolymph was taken as much as 1 ml then planted in Zobell, GSP and TCBS medium. Postulate Koch test conducted on the six selected isolate at 9 crabs with a dose of 108 CFU/ml as much as 0,2 ml in the swimming legs. Observation of clinical sign and mortality conducted for 168 hours after have been injected. Characterization of causative agent bacterial disease conducted by morfology and biochemical test. The result of this research showed that the clinical sign were detected lesion and red color (melanisation) in the carapace, dark color in the carapace, darkside in abdominal, there are white spot in some part. Based postulate Koch test from 6 isolate concluded that caused 100% mortality in mud crab testing. The resulted of characterization morfology and biochemical test from 6 isolate causative agent is  Vibrio parahaemolyticus (SJ.D 2), V. alginolyticus (SJ.D 4), V. ordalii (SJ.D 9),  V. harveyi (SJ.D 12), Aeromonas hydrophila (SJ.D 16) and Pseudomonas aeruginosa (SJ.D 17). The six bacterial isolate is a pathogen caused mortality in the mud crab with good water quality.
PENGARUH PENAMBAHAN VITAMIN E PADA PAKAN BUATAN TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAN KEPITING BAKAU (Scylla paramamosain) Winestri, Jati; Rachmawati, Diana; Samidjan, Istiyanto
Journal of Aquaculture Management and Technology Volume 3, Nomor 4, Tahun 2014
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Salah satu alternatif untuk mengatasi permasalahan pertumbuhan kepiting bakau yang lambat yaitu penambahan vitamin E pada pakan buatan guna meningkatkan nutrisi pakan. Vitamin E yang berfungsi sebagai antioksidan yang menjaga kerusakan protein dan enzim dari radikal bebas yang dapat menghambat pertumbuhan dan proses metabolisme. Penelitian ini bertujuan untuk mengkaji pengaruh penambahan vitamin E pada pakan buatan terhadap pertumbuhan dan kelulushidupan kepiting bakau (S. paramamosain). Penelitian ini dilaksanakan pada Januari hingga Maret 2014 di tambak Desa Tapak, Kecamatan Tugurejo, Mangkang, Semarang. Hewan uji yang digunakan adalah kepiting bakau (S. paramamosain) dengan bobot rata-rata 109,1±1,7 g/ekor yang dipelihara selama 56 hari dengan kepadatan 1 ekor/keranjang plastik dengan ukuran (25 x 16 x 15) cm3. Pemberian pakan sebanyak 5% bobot biomass/hari. Metode yang digunakan dalam penelitian ini adalah eksperimental lapangan dengan pola Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 ulangan penambahan vitamin E, yaitu perlakuan A (0 g/100 g), B (0,4 g/100 g), C (0,6 g/100 g), dan D (0,8 g/100 g).  Hasil dari penelitian ini menunjukkan bahwa penambahan vitamin E memberikan pengaruh nyata (P<0,05) terhadap efisiensi pemanfaatan pakan protein efisiensi rasio dan laju pertumbuhan relatif. Hasil terbaik diperoleh pada perlakuan D dengan nilai (17,88±3,51%), (2,86±0,55%), dan (4,03±0,93%). Penambahan vitamin E tidak memberikan pengaruh nyata (P>0,05) terhadap kelulushidupan kepiting bakau (S. paramamosain). Hasil kualitas air masih dalam kisaran kelayakan bagi budidaya kepiting bakau (S. paramamosain) terkecuali salinitas sedikit dibawah nilai kelayakan namun masih dapat ditolerir oleh kepiting bakau (S. paramamosain). Kesimpulan dari penelitian ini penambahan vitamin E 0,8 g/100 g pada pakan buatan memberikan hasil terbaik terhadap pertumbuhan kepiting bakau (S. paramamosain). One of alternative to overcome the problems in mud crab growthrates was dietary of vitamin E. Vitamin E have function as antioxidant to maintaince the proteins and enzymes by preventing free radicals which can disturb the growth and metabolism processes. This research aimed to assess effect of dietary of vitamin E on the growth and survival rate of mud crabs (S. paramamosain). The research was conducted in January until March 2014 in the brackish water pond Tapak Village, District Tugurejo, Mangkang, Semarang. The animals tested used were mud crab (S. paramamosain) with an average body weight of 109.1±1.7 g/individual, during 56 days at a density of 1 individual/basket with size (25 x 16 x 15) cm3. The feeding rate were 5% for weight biomass/day. The method used in this study is an experimental field with the pattern completely randomized design with 4 treatments and 3 replications of dietarary vitamin E, they were treatment A (0 g/100 g), B (0,4 g/100 g), C (0,6 g/100 g), and D (0,8 g/100 g). The results of this research indicate that dietary of vitamin E effect (P<0.05) on the efficiency of feed utilization, protein efficiency ratio and relative growth rate. The best results were obtained on treatment D with the value (17.88±3.51%), (2.86±0.55%), and (4.03±0.93%). Effects of dietary vitamin E didn’t give significant effect (P>0.05) on the survival rate of mud crab (S. paramamosain). Results of water quality was still within the range of feasibility for mud crab culture (S. paramamosain) except salinity slightly below the value of eligibility but can be tolerated by the mud crab (S. paramamosain). The conclusion of this research dietary 0.8 g/100 g vitamin E gives the best results on the growth of mud crab (S. paramamosain).
PERFORMA PERTUMBUHAN DAN KELULUSHIDUPAN KEPITING BAKAU (Scylla paramamosain) MELALUI PEMBERIAN PAKAN BUATAN DENGAN PERSENTASE JUMLAH YANG BERBEDA Putri, Rizki Andika; Samidjan, Istiyanto; Rachmawati, Diana
Journal of Aquaculture Management and Technology Volume 3, Nomor 4, Tahun 2014
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Kepiting Bakau (Scylla paramamosain) merupakan salah satu komoditi perikanan bernilai ekonomis penting dengan harga pasaran Rp 40.000-200.000,-/kg sehingga berpotensi untuk dibudidayakan. Salah satu aspek yang perlu diperhatikan dalam usaha kegiatan budidaya adalah pakan. Penelitian ini bertujuan untuk mengetahui performa pertumbuhan dan kelulushidupan kepiting bakau (S. paramamosain) yang terbaik dan optimal melalui pemberian pakan buatan dengan persentase jumlah yang berbeda.Materi yang digunakan adalah kepiting bakau (S. paramamosain) dengan bobot rata-rata 100.5±1.03 g. Kepiting dipelihara dalam wadah keranjang buah. Pakan uji adalah pakan buatan berbentuk pelet dengan kandungan protein 35% yang ditambah vitamin C sebesar 24 mg/100g pakan. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 4 perlakuan dan 3 ulangan, kemudian dilanjutkan dengan Uji Jarak Ganda Ducan untuk mengetahui perbedaan nilai antar perlakuan dan Regresi Polinomial Ortogonal untuk menentukan persentase yang optimal. Perlakuan dalam penelitian ini yaitu pemberian pakan dengan persentase  3%(A), 5% (B), 7% (C), dan 9% (D) dari bobot biomassa/hari. Peubah yang diukur yaitu laju pertumbuhan relatif (RGR), efisiensi pemanfaatan pakan (EPP) dan kelulushidupan (SR). Hasil penelitian menunjukkan bahwa perbedaan persentase jumlah pakan berpengaruh nyata (P<0.05) terhadap EPP, sangat nyata (P<0.01) terhadap RGR namun tidak berpengaruh nyata (P>0.05) terhadap SR. Persentase jumlah pakan optimal untuk RGR adalah 5.93% dan EPP 5.4% dari bobot biomassa/hari. Mudcrab (Scylla paramamosain) was one of important fisheries commodity with value 40.000-200.000,-/kg, so potencial was cultivation. One aspect for attention in cultivation were feeds. The aims of study were to determine the growth performance and survival rate of mud crab (S. paramamosain) that the best and optimal through artificial feed with different amount percentages. The materials used are mudcrabs (S. paramamosain) with the initial weigth ranging 100.5± 1.03 g. Crabs kept in containers fruit basket. Experimental diets (pellet formed) with 35% protein content plus vitamin C by 24mg/100g feed. The completely Randomize Design were adopted in this study with 4 treatments and replicated 3 times, then followed by Duncan’s New Multiple Range Test in order to determine the difference among the treatments and Orthogonal Polinomial Regression to determine the optimal treatments. Treatments in this study were percentage of artificial feed 3% (A), 5% (B), 7% (C) and 9% (D) bodyweight/day.The measured variabel were relative growth rate (RGR), food efficiency (EPP), and survival rate(SR).The results derived from this study indicated that different amount percentages was significantly (P<0.05) to EPP, highly significant (P<0.01) to RGR but it’s not significant (P>0.05) to SR. The optimal pecentages’s feed for RGR 5.93% and EPP 5.4% from bodyweight/day.
PENGARUH PERSENTASE JUMLAH PAKAN BUATAN YANG BERBEDA TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAN KEPITING BAKAU (Scylla paramamosain) Qomariyah, Lailiyul; Samidjan, Istiyanto; Rachmawati, Diana
Journal of Aquaculture Management and Technology Volume 3, Nomor 4, Tahun 2014
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Pakan merupakan salah satu modal operasional yang besar dalam usaha budidaya kepiting bakau (S. paramamosain).  Pakan yang digunakan harus dapat berperan efisien, supaya dapat menekan biaya tanpa mengurangi tingkat produksi. Penelitian ini bertujuan untuk mengetahui pengaruh persentase pakan optimal terhadap perkembangan budidaya kepiting bakau (S. paramamosain). Penelitian ini menggunakan Metode Eksperimental yang dilakukan di lapangan dengan Rancangan Acak Lengkap (RAL) yaitu 4 perlakuan dan 3 ulangan.  Perlakuan A (pakan 3% dari bobot biomassa pakan), B (pakan 5% dari bobot biomassa pakan), C (pakan 7% dari bobot biomassa pakan, D (pakan 9% dari bobot biomassa pakan). Hewan uji yang digunakan adalah kepiting bakau (S. paramamosain) dengan berat awal rata-rata 111,91±1,12 g/ekor. Pakan uji merupakan pakan buatan yang diperkaya dengan vitamin E dengan dosis 0,8 g/100 g  pakan, kandungan protein dalam pakan mencapai 35 %. Kepiting bakau (Scylla paramamosain) dipelihara dengan metode single room dalam basket plastik berukuran 25 x 16 x 15 cm selama 56 hari. Hasil penelitian menunjukkan persentase pakan buatan  memberikan pengaruh nyata (P<0,05) terhadap RGR, EPP, PER, tetapi tidak berpengaruh nyata (P>0,05) terhadap SR kepiting bakau.  Persentase optimal yang dihasilkan dari pertumbuhan adalah 7,59%, sedangkan untuk efisieinsi pakan adalah 7,72%. Nilai kelulushidupan kepiting bakau (Scylla paramamosain) berkisar antara 66,67–100,00%. Kesimpulan dari penelitian ini adalah persentase pemberian pakan dengan jumlah berbeda memberikan pengaruh nyata terhadap laju pertumbuhan relatif, efisiensi pemanfaatan pakan dan protein efisiensi pakan, namun tidak memberikan pengaruh nyata terhadap kelulushidupan. persentase pemberian pakan yang dapat diberikan pada pakan buatan untuk kepiting bakau (Scylla paramamosain) adalah pakan dengan persentase 7% dari bobot biomassa. Feed is one of the major operating in cultivation of mud crab (S. paramamosain). Feed used must be able to act efficiently, in order to reduce costs without reducing the level of production. This research aims to determine the optimal effect of the feed percentage on the growth of mud crab aquaculture (S. paramamosain). This research was conducted using Experimental Methods with completely randomized design (CRD), those is 4 treatments and 3 replications. Treatment A (3% feeds of the weight biomass), B (5% feeds of weight biomass), C (7% feeds of weight biomass feed, D (9% feeds of weight biomass). Animal testing used was mud crab (S. paramamosain) with an average initial weight of 111.91 ± 1.12 g / individual. Feed testing is artificial feed enriched with vitamin E at a dose of 0.8 g/100 g of feed, protein content in the feed is 35%. Mud crab (S. paramamosain) maintained by the method of single room in a plastic basket measuring 25 x 16 x 15 cm during 56 day. The results shows the percentage of artificial feed gives significant effect (P <0.05) on RGR, EPP, PER, but not significantly (P> 0.05) on SR mangrove crabs. The optimal resulting percentage of growth was 7.59%, while for efisieinsi feed is 7.72%. The survival rate of mud crab (S. paramamosain) ranged from 66.67 to 100.00%.The survival rate of mud crab (S. paramamosain) ranged from 66.67 to 100.00%. The conclusion of this study is the addition with different doses significant effect on absolute weight growth and efficiency of feed utilization but no significant effect on survival rate. percentage of feeding that can be given on artificial feed for mud crab (S. paramamosain) is feed to the percentage of 7% of the weight of the biomass.
PENGARUH PENAMBAHAN VITAMIN C DENGAN DOSIS YANG BERBEDA PADA PAKAN BUATAN TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAN KEPITING BAKAU (Scylla sp) Ambarwati, Ananti Trisno; Rachmawati, Diana; Samidjan, Istiyanto
Journal of Aquaculture Management and Technology Volume 3, Nomor 4, Tahun 2014
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Peningkatan nilai nutrisi pakan buatan dapat dilakukan dengan penambahan vitamin C sehingga diharapkan mampu meningkatkan pertumbuhan dan kelulushidupan kepiting bakau (Scylla sp). Penelitian ini bertujuan untuk mengetahui pengaruh penambahan vitamin C dengan dosis yang berbeda pada pakan buatan serta mengetahui dosis terbaik vitamin C terhadap pertumbuhan dan kelulushidupan kepiting bakau (Scylla sp). Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 5 perlakuan dan 3 ulangan. Perlakuan tersebut adalah penambahan vitamin C dengan dosis yang berbeda pada pakan buatan, A (0 mg/100 g), B (12 mg/100 g), C (18 mg/100 g), D (24 mg/100 g), dan E (30 mg/100 g). Hewan uji yang digunakan adalah kepiting bakau (Scylla sp) dengan bobot rata-rata 114,7±1,6 g/ekor. Kepiting bakau (Scylla sp) dipelihara dengan metode single room dalam basket plastik berukuran 21 cm x 21 cm x 16 cm selama 56 hari dan pemberian pakan 5%/bobot biomassa/hari. Hasil penelitian menunjukkan bahwa penambahan vitamin C dengan dosis yang berbeda pada pakan buatan berpengaruh nyata (P<0,05) terhadap pertumbuhan mutlak dan efisiensi pemanfaatan pakan namun tidak berbeda nyata terhadap kelulushidupan kepiting bakau (Scylla sp). Pertumbuhan bobot mutlak yang tertinggi dicapai oleh perlakuan D (18,90±5,60 g), efisiensi pemanfaatan pakan tertinggi pada perlakuan D (5,56±1,62%). Nilai kelulushidupan kepiting bakau (Scylla sp) berkisar antara 66,67–100,00%. Kesimpulan dari penelitian ini adalah penambahan vitamin C dengan dosis yang berbeda memberikan pengaruh nyata terhadap pertumbuhan bobot mutlak dan efisiensi pemanfaatan pakan namun tidak memberikan pengaruh nyata terhadap kelulushidupan. Dosis vitamin C yang dapat ditambahkan pada pakan buatan untuk kepiting bakau (Scylla sp) adalah 12 mg/100 g hingga 24 mg/100 g pakan. Improvement of nutrition value of artificial feed can be done with the addition of vitamin C that are expected to enhance the growth and survival rate of mud crab (Scylla sp). This study aims to determine the effect of vitamin C with different doses on artificial feed, and know the best dose of vitamin C on the growth and survival of mud crab (Scylla sp). This study used a completely randomized design  with 5 treatments and 3 replications. The treatment is the addition of vitamin C with different doses on artificial feed, A (0 mg/100 g), B (12 mg/100 g), C (18 mg/100 g), D (24 mg/100 g) , and E (30 mg/100 g). The animal trials that used was mud crab (Scylla sp) with an average weight of 114.7±1.6 g/individual. Mud crab (Scylla sp) maintained by the method of single room in a plastic basket measuring 21 cm x 21 cm x 16 cm during 56 days of feeding 5% / biomass  weight/day. The results showed that the addition of vitamin C with different doses on artificial diets significantly (P <0.05) on absolute weight growth and efficiency of feed utilization but not significantly different to the survival of mud crab (Scylla sp). The highest absolute weight growth achieved by treatment D (18.90 ± 5.60 g), the highest efficiency of feed utilization by treatment D (5,56±1,62%). The survival rate of mud crab (Scylla sp) ranged from 66.67 to 100.00%. The conclusion of this study is the addition of vitamin C with different doses significant effect on absolute weight growth and efficiency of feed utilization but no significant effect on survival rate. The dose of vitamin C can be added to artificial feed for mud crab (Scylla sp) is 12 mg/100 g to 24 mg/100 g of feed. 
SUBTITUSI PAKAN SEGAR DENGAN PAKAN BUATAN TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAKN KEPITING BAKAU (Scylla paramamosain) Rahadiyani, Mega; Rachmawati, Diana; Samidjan, Istiyanto
Journal of Aquaculture Management and Technology Volume 3, Nomor 4, Tahun 2014
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Abstract

Pakan merupakan unsur terpenting dalam menunjang pertumbuhan dan kelangsungan hidup kepiting bakau. Pakan buatan sangat diperlukan terutama pada budidaya secara intensif yang membutuhkan pakan buatan sebagai sumber energi utama, sedangkan pada saat ini pembudidaya kepiting bakau (S. paramamosain) masih menggunakan pakan segar yaitu berupa ikan rucah. Penelitian ini bertujuan untuk mengetahui pengaruh dan persentase terbaik dalam subsitusi pakan segar dengan pakan buatan  terhadap pertumbuhan dan kelulushidupan kepiting bakau di Desa Tapak kecamatan Tugu, Semarang pada Januari – Maret 2014Hewan uji yang digunakan adalah Kepiting Bakau (S. paramamosain) dengan ukuran 122,5±1,5 g. Penelitian ini dilakukan dengan metode eksperimental menggunakan rancangan acak lengkap (RAL) dengan 3 kali ulangan yaitu perlakuan A (0% pakan buatan dan 100% pakan segar), B (25% pakan buatan dan 75% pakan segar), C (50% pakan buatan dan 50% pakan segar), D ( 75% pakan buatan dan 25% pakan segar) dan E (100% pakan buatan dan 0% pakan segar).Hasil penelitian menunjukan bahwa subtitusi pakan segar dengan pakan buatan terdapat pengaruh nyata (P<0,05) terhadap pertumbuhan dan tidak berpengaruh nyata (P>0,05) terhadap kelulushidupan kepiting bakau (S. paramamosain). Perlakuan D (75% pakan buatan dan 25% pakan segar) memiliki hasil tertinggi dengan nilai pertumbuhan bobot mutlak sebesar 18,50±2,62 g. Nilai kelulushidupan kepiting bakau (S. paramamosain) berkisar antara 66,67-100%. Kualitas air pada media pemeliharaan terdapat pada kisaran yang layak dan beberapa parameter kualitas air terdapat pada batas minimum. Feeds is constitutes primal element in prop growth and survival rate of mud crabs. Indispensable artificial feeds especially on treatmenting intensively which need brand feeds as source of main energy, meanwhile for the moment mud crabs ( S. paramamosain ) still utilize fresh feeds which is as fish.  This research intent to know influence and best percentage in subtituation fresh feeds with feeds artificialing to growth and survival rate of mud crabs at Desa Tapak kecamatan Tugu, on January – March 2014.Animal tests that is utilized is mud crabs ( S. paramamosain ) with measure 122,5±1,5 g. This research did by method experimentaling to utilize fledged random design (RAL) with 3 time replicate which is treatment A (0% artificial feeds and 100% fresh feeds), B (25% artificial feeds and 75% fresh feeds), C (50% artificial feeds and 50% fresh feeds), D.( 75% artificial feeds and 25% fresh feeds) and e (100% artificial feeds and 0% fresh feeds).The result showed that subtitusi of fresh feeds with artificial feeds to be gotten reality influence (P<0,05) to growth and not significant (P>0,05) to survival rate of mud crabs ( S. paramamosain ). Treatment D (75% artificial feeds and 25% fresh feeds) having supreme result with appreciative absolute weight growth as big as 18,50±2,62 g. The survival rate of mud crab (S. paramamosain) ranged from 66.67 to 100.00%. Water quality on preserve media exists on gyration that reasonably and some water quality parameter exists on minimum bounds. 
EFEKTIVITAS SUBSTITUSI TEPUNG IKAN DENGAN TEPUNG MAGGOT DALAM PAKAN BUATAN TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAN IKAN PATIN (The Effect of Substitution of Fish Meal with Maggot Meal in Artificial Feed for Growth And Survival Rate of Catfish) Rachmawati, Diana; Samidjan, Istiyanto
JURNAL SAINTEK PERIKANAN Vol 9, No 1 (2013): JURNAL SAINTEK PERIKANAN
Publisher : JURNAL SAINTEK PERIKANAN

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Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh subtitusi tepung ikan dengan tepung maggot terhadap petumbuhan dan kelulushidupan ikan Patin (Pangasius pangasius), serta untuk mengetahui persentase tepung maggot yang paling baik sebagai bahan alternatif pengganti tepung ikan.  Sebanyak 450 ekor ikan Patin (P. pangasius)  dengan bobot rata-rata 147.4+0.062 g dipelihara dalam 15 unit hapa (1m x 1 m x 1.2 m) dengan padat tebar 30 ekor hapa-1 dipelihara selama 56 hari. Pakan uji yang digunakan dalam penelitian ini adalah pakan buatan berbentuk pellet dengan kandungan protein 25% dengan persentase substitusi tepung ikan dengan tepung maggot sesuai dengan perlakuan. Ada 5 tingkatan kombinasi substitusi yaitu: 0%, 25%, 50%, 75%, dan 100% maggot segar dihitung dari bobot kering. Metode penelitian yang digunakan adalah metode eksperimen. Rancangan percobaan menggunakan Rancangan Acak Lengkap (RAL).  Hasil penelitian menunjukkan bahwa pakan uji dengan substitusi tepung ikan dengan tepung maggot persentase berbeda memberikan pengaruh yang sangat nyata (P < 0.01) terhadap  pertumbuhan mutlak, laju pertumbuhan spesifik, rasio konversi pakan dan tidak berpengaruh  nyata (P > 0.05) terhadap terhadap kelulushidupan ikan Patin (P. pangasius).  Hasil penelitian memberikan rataan pertumbuhan bobot mutlak akhir ikan Patin menurun dengan meningkatnya persentase substitusi tepung ikan dengan tepung maggot (147.63 g, 0%; 158.53 g, 25%: 142.76 g, 50%; 127.36 g, 75%; 126.10 g, 100%).  Sedangkan pertumbuhan (SGR) berkisar antara 1.22-1.38% hari-1, dengan konversi pakan (FCR) 2.61-2.98.  Dari hasil analisis ANOVA dapat disimpulkan bahwa untuk mandapatkan pertumbuhan bobot mutlak dan laju pertumbuhan spesifik (SGR) yang terbaik, maggot dapat menggantikan tepung ikan dalam pakan uji sampai 25%, dengan rasio konversi pakan (FCR) sebesar 2.61. Kata Kunci :  Maggot, pakan buatan,  substitusi, pertumbuhan, konversi pakan The purpose of this study was to assess the effect of substitution of fish meal with maggot meal for growth and survival rate of  catfish (Pangasius pangasius), as well as to determine the best percentage of the Maggot meal on artificial feed for fish meal substitution. The total of 450 catfish with an average individual weight of 47.4+0.062 g were cultivated in 15 unit hapas with the dimension of 1m x 1m x 1,2m.  The density of catfish was 30 tails per hapa and nurtured for 56 days. The artificial feed for the experiment was formed as pellets and its protein content was 25%. The study had 5 reiterations of fish meal substitution on artificial feed with the Maggot meal.  There were 0%, 25%, 50%, 75%, and 100%. The research method used in this study was experimental method. The design of experiments was a complete random design. The results showed that artificial feed of Maggot meal on different reiterations significantly (P < 0.01) affected  on the absolute growth, the specific growth rate, and the feed conversion ratio; however, it did  not significantly (P > 0.05 ) affect on the survival rate of cafish (P. pangasius). The study also revealed that the percentage of Maggot meal subtituions negatively related to the weight of harvested average catfish, the higher the percentage of Maggot substituions the lower the weight of the average catfish  (147.63 g, 0%; 158.53 g, 25%: 142.76 g, 50%; 127.36 g, 75%; 126.10 g, 100%). Special Growth Rate (SGR) ranged from 1.22% to 1.38% per day with the Feed Conversion Ratio (FCR) between 2.61-2.98. Based on the ANOVA analysis the artificial feed of Maggot meal with 25% substitution gave the best effect on  both of the absolute and specific growth rate with the FCR of 2.61. Key words : Maggot meal, artificial feed, substitution, growth, food conversion