ABSTRAKIkan nila merupakan salah satu jenis ikan bernilai ekonomis tinggi dan banyak dikonsumsi masyarakat. Sehubungan dengan hal tersebut, perlu dilakukan rekayasa budidaya untuk memenuhi kebutuhan dan permintaan masyarakat. Penelitian ini bertujuan untuk mengetahui pengaruh lama waktu perendaman tiroksin dan mengetahui lama waktu perendaman tiroksin yang terbaik digunakan untuk memacu pertumbuhan dan kelulushidupan larva nila putih. Penelitian ini dilaksanakan di Balai Benih Ikan Siwarak (BBI) Ungaran, Semarang, Jawa Tengah, pada bulan Oktober-November 2018. Ikan uji yang digunakan adalah larva ikan nila putih yang telah lepas kuning telur. Pemeliharaan dilakukan selama 35 hari. Penelitian ini menggunakan 4 perlakuan dan 3 ulangan yaitu A direndam tiroksin 0,1 mg/L selama 0 menit (kontrol), B direndam tiroksin 0,1 mg/L selama 12 jam, C direndam tiroksin 0,1 mg/L selama 24 jam, D direndam tiroksin 0,1 mg/L selama 36 jam. Variabel yang diukur meliputi, pertumbuhan bobot mutlak, pertumbuhan panjang mutlak, laju pertumbuhan spesifik, kelulushidupan, dan kualitas air. Nilai terbaik pertumbuhan bobot mutlak adalah C 1,05±0,21g. Nilai terbaik laju pertumbuhan spesifik adalah C 10,20±0,54%/hari. Nilai terbaik pertumbuhan panjang mutlak adalah C 36,03±2,59cm. Nilai terbaik kelulushidupan adalah B 92,22±0,96% tetapi tidak berpengaruh nyata terhadap semua perlakuan. Dengan demikian lama waktu perendaman tiroksin berpengaruh nyata terhadap pertumbuhan bobot mutlak, laju pertumbuhan spesifik, dan pertumbuhan panjang mutlak larva nila putih namun tidak berpengaruh nyata terhadap tingkat kelulushidupan larva nila putih. Lama waktu perendaman terbaik untuk meningkatkan pertumbuhan dan kelulushidupan larva nila putih adalah 24 jam.Kata kunci : Lama Waktu Perendaman; Tiroksin; Pertumbuhan; Kelulushidupan; Nila PutihABSTRACT Tilapia fish is one kind fish of high economical value and widely consumed by society. In this regard, cultivation needs to be done to meet the demands and demands of the community. The study aims to determine the long-term influence of thyroxine and the long-time immersion of thyroxine is best used to spur the growth and livelihoods of white tilapia larvae. This research was conducted in the Siwarak Fish Seed Hall (BBI) Ungaran, Semarang, Central Java, in October-November 2018. The test fish used are white tilapia larvae that have loose egg yolks. Maintenance is done for 35 days. This study uses 4 treatments and 3 repeats ie A soaked thyroxine 0.1 mg/L for 0 hours (control), B soaked thyroxine 0.1 mg/L for 12 hours, C soaked thyroxine 0.1 mg/L for 24 h, D soaked thyroxine 0.1 mg/L for 36 hours. The variables measured include, absolute weight growth, absolute length growth, specific growth rate, sustainability, and water quality. The best value of absolute weight growth is C 1.05 ± 0, 21g. The best value of the specific growth rate is C 10,20 ± 0.54%/day. Best value of absolute length growth is C 36,03 ± 2, 59cm. The best value of a livelihood is B 92,22 ± 0.96% but has no real effect on all treatment. Thus a long time the immersion of thyroxine has a noticeable effect on absolute weight growth, specific growth rate, and the absolute long growth of white tilapia larvae but does not affect the degree of livelihood of white tilapia larva. The length of the best soaking time to improve the growth and livelihoods of white tilapia larvae is 24 hours.Key words: Immersion Time; Thyroxine; Growth; Survival; White Tilapia
ABSTRAKSidat (Anguilla bicolor) merupakan jenis ikan yang pertumbuhan lambat, karena kemampuan daya cerna dan efisiensi pemanfaatan pakan sidat rendah. Salah satu usaha untuk mempercepat laju pertumbuhannya yaitu dengan memfermentasikan pakan buatan dan penambahan tepung cacing (Lumbricus sp.) untuk memperbaiki kandungan nutrisi pakan sehingga pertumbuhan sidat akan meningkat. Penelitian ini bertujuan untuk mengkaji pengaruh dan menentukan kombinasi fermentasi pakan buatan dan penambahan tepung cacing tanah yang memberikan pertumbuhan, efisiensi pakan, dan kelulushidupan sidat (A. bicolor) terbaik. Elver sidat yang digunakan adalah 320 ekor dengan berat rata-rata 15±1,2 g yang dibudidayakan dalam enam belas akuarium berukuran 80 l yang diisi 40 L air dan diaerasi. Kepadatan awal 20 ekor/akuarium. Pergantian air dilakukan setiap hari 10% dari total air dan dilakukan pemberian pakan 5% dari biomassa sidat dengan frekuensi pemberian pakan 3 kali sehari, pakan yang diberikan mempunyai kadar protein >50%. Pola rancangan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 4 ulangan. Perlakuan yang diberikan adalah A, B, C, dan D masing-masing ditambahkan dengan tepung cacing tanah 0%, 5%, 10%, dan 15% dari total pakan yang diberikan dalam pakan buatan yang telah difermentasi. Variabel yang diukur adalah PER, SGR, EPP, FCR, dan SR. Hasil penelitian menunjukkan bahwa fermentasi pakan buatan dan penambahan tepung cacing tanah dalam pakan berbentuk pasta berpengaruh nyata (p<0,05) terhadap pertumbuhan (RGR) ,efisiensi pakan (EPP) dan rasio konversi pakan (FCR) namun tidak berpengaruh nyata terhadap kelulushidupan (SR) sidat (A. bicolor) dan kombinasi fermentasi pakan buatan dan penambahan tepung cacing tanah dengan dosis 5% (perlakuan B) memberikan pertumbuhan, efisiensi pakan, dan rasio konversi pakan sidat (A. bicolor) terbaik. Kualitas air pada media pemeliharaan masih pada kondisi layak untuk budidaya sidat. Kata kunci: Anguilla bicolor, fermentasi pakan, tepung cacing tanah, budidaya ABSTRACT The elver of Anguilla bicolor is the kind of fish that the late growth, due to low in digestability and inefficiency to the feed utilization. One of the solutions to accelerate the growth rate is by adding earthworm powder (Lumbricus sp.) and the fermented artificial feed to improve feed nutrition content so the increasing growth. The obyective of this research was to know the effect of fermented artificial feed and the addition of earthworm powder in pasta artificial
Ikan tawes merupakan jenis ikan air tawar yang mempunyai potensi besar untuk dibudidayakan. Percepatan waktu produksi benih ikan tawes dapat dilakukan dengan merangsang pertumbuhan melalui aplikasi recombinant growth hormone (rGH) dalam pakan. Penentuan interval waktu pemberian pakan yang ditambahkan rGH sangat penting dikarenakan penggunaan interval waktu akan memengaruhi jumlah rGH yang masuk ke dalam tubuh ikan. Interval waktu yang tepat akan memberikan jumlah dosis rGH yang cukup yang dibutuhkan oleh ikan. Penelitian ini bertujuan untuk mengetahui pengaruh interval waktu terbaik pemberian pakan yang ditambahkan rGH terhadap pertumbuhan dan sintasan benih ikan tawes (Puntius sp.). Ikan uji yang digunakan adalah benih ikan tawes ukuran 2,53 ± 0,15 cm dengan bobot 0,19 ± 0,08 g. Percobaan menggunakan rancangan acak lengkap (RAL) dengan empat perlakuan dan tiga ulangan yakni pemberian pakan tanpa rGH (perlakuan A), pemberian pakan rGH setiap hari (perlakuan B), pemberian pakan rGH setiap dua hari (perlakuan C), pemberian pakan rGH setiap tiap hari (perlakuan D). Masing-masing perlakuan terdiri atas tiga ulangan. Dosis hormon rGH dalam pakan adalah 2 mg/kg pakan. Hasil penelitian menunjukkan bahwa pengaruh pemberian rGH dalam pakan dengan interval waktu yang berbeda berpengaruh nyata (P<0,05) terhadap total konsumsi pakan (TKP), rasio konversi pakan (FCR), pertumbuhan bobot mutlak dan panjang mutlak, efisiensi pemanfaatan pakan (EPP), dan tidak berpengaruh nyata (P>0,05) terhadap specific growth rate (SGR), dan tingkat sintasan (SR). Interval waktu terbaik pemberian pakan yang ditambahkan rGH terhadap pertumbuhan dan sintasan benih ikan tawes (Puntius sp.) adalah setiap tiga hari sekali (perlakuan D) yang menghasilkan TKP (105,52 ± 4,32); FCR (1,22 ± 0,05); EPP (79,50 ± 3,88); SGR (4,90 ± 0,39); pertumbuhan bobot mutlak (1,80 ± 0,12); pertumbuhan panjang mutlak (2,68 ± 0,01).Tawes is a potential freshwater aquaculture fish species. Tawes hatchery technology is currently being improved where the production of its juveniles can be accelerated by supplementing recombinant growth hormone (rGH) in the feed. Determining the time of feeding interval of feed supplemented with rGH is pivotal to controlling the amount consumed and thus the expected effects of rGH. This study aimed to determine the effects of feeding time intervals on the growth and survival rate of tawes juvenile feed with rGH supplemented feed. Tawes juveniles with an average length of 2.53 ± 0.15 cm and weight of 0.19 ± 0.08 gram were used in this research. A commercial feed was supplemented with rGH at a dose of 2 mg/kg rGH. The experiment used a completely randomized design (CRD) with four treatments and three replications, namely feeding with feed containing no rGH (treatment A), feeding with feed containing rGH every day (treatment B), feeding with feed containing rGH every two days (treatment C), feeding with feed containing rGH every three days (treatment D). The results showed that different feeding time intervals of the feed significantly affected (P<0.05) the total feed consumption (TFC), feed conversion ratio (FCR), absolute weight and length growth, feed utilization efficiency (EPP). There was no significant effect (P>0.05) on the specific growth rate (SGR) and the survival rate (SR). The best time feeding interval was achieved by fish in treatment D (every three days feeding with rGH) indicated by better values of TFC (105.52 ± 4.32), FCR (1.22 ± 0.05), EPP (79.50 ± 3.88), SGR (4.90 ± 0.39), absolute weight gain (1.80 ± 0.12), absolute length gain (2.68 ± 0.01), and SR (93.33 ± 4.16).
Beong are one of endogenous fish in Indonesia and still rely on catches from nature. The level of growth and survival rate in culture of beong is still low, so it is necessary to do cultivation efforts for conservation of beong, so that the beong can be cultivated intensively. One effort that can be do is biological manipulation in the form of stocking density. This study aims to determine the effect of shocking density on growth and survival rate and find out the best amount too. The study was conducted in April-May 2018 at UPT BBI Sawangan, Magelang, Central Java. The method used in this study was experiment method and Completely Randomized Design (CRD) for 4 treatments, 3 replicates with stocking dencities of A (10 fish/m2), B (30 fish/m2), C (50 fish/m2)and D (70 fish/m2). The results showed that different stocking densities gave a significant effect (Sig.> 0.05) on TKP, FCR, SGR and SR. This is allegedly due to feed competition, space competition and cannibalism in Beong fish. Treatment B gave the best results at TKP, FCR, SGR and SR with a value of 1.36 ± 0.01 gr / individual, 1.15 ± 0.11, 4.58 ± 0.22% / day and 83.33 ± 3,34%.
As a food ingredient, turmeric curcumin increases appetite and increases the effectiveness of digestive organs function, while garlic increases fish growth. The combination of the two ingredients is believed to increase growth and survival rate of catfish. This study aimed to determine growth performance, Food Conversion Ratio (FCR) and Survival Rate (SR) of catfish seeds in high density fish farming based on biofloc, and supplemented with turmeric and garlic for feed. The research methodology was a complete randomized design, and treated with T1: turmeric and garlic given once a week; T2: turmeric and garlic were given twice a week, and T3: turmeric and garlic were given three times a week. Fish weight was recorded every week, then data were analyzed for fish growth using regression. The study was conducted in 4 weeks. The results showed that the best weight growth performance was obtained at T1 with the regression equation YT1 = −1.07 + 17.92. This equation provides predictions that fish harvesting can be carried out within 6 weeks, with the average weight of fish measured at 100 grams and FCR = 0.91 ± 0.016 and SR = 88.45 ± 8.89%.
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