Ikan nila merupakan ikan budidaya yang disukai oleh masyarakat karena dagingnya yang gurih dan lezat. Untuk peningkatkan produksi ikan nila diperlukan pakan yang cukup, baik kualitas maupun kuantitasnya. Pakan merupakan komponen biaya operasional utama pada budidaya ikan nila yang diperkirakan mencapai 40%-60%. Untuk mengatasi hal tersebut diperlukan teknologi yang dapat menekan biaya operasional dalam sistem budidaya. Tujuan dari penelitian ini adalah mengevaluasi frekuensi pemberian pakan yang berbeda terhadap pertumbuhan dan sintasan ikan nila merah (Oreochromis niloticus) yang dipelihara dengan sistem bioflok. Metode yang diterapkan adalah eksperimen dengan empat perlakuan dan tiga kali ulangan. Perlakuannya adalah frekuensi pemberian pakan pelet yaitu (A) 1 kali/hari, (B) 2 kali/hari, 3 kali/hari, dan 4 kali/hari. Ikan nila ukuran 3,71 ± 0,11 cm dan bobot 4,49 ± 0,021 g dipelihara selama 56 hari dalam bak 100 L dengan padat tebar 16 ekor/bak. Ikan dipelihara dengan teknologi bioflok dan diberikan pakan setiap harinya sebanyak 5%/berat biomasa/hari. Hasil penelitian menunjukkan bahwa pemeliharaan ikan nila merah pada sistem bioflok dengan frekuensi pemberian pakan yang berbeda berpengaruh nyata (P<0,05) terhadap performa pertumbuhan, sintasan, dan efisensi pakan. Perlakuan frekuensi pemberiaan pakan 2 kali/hari merupakan perlakuan terbaik menghasilkan pertumbuhan bobot mutlak 23,07 ± 0,89 g; laju pertumbuhan harian 3,23 ± 0,05%; sintasan 91,66 ± 3,60%; dan efisensi pakan 96,73 ± 6,70%.Tilapia (Oreochromis niloticus) is a cultured fish that is favored by the public, because of its delicious meat and high protein content. To increase production, quality, and quantity of feed is needed, feed is the main component in the cultivation system and it is estimated that 40%-60% of the costs incurred in maintaining tilapia are needed. To overcome this, technology is needed that can reduce operational costs in fish culture. The purpose of this study was to evaluate the growth and survival of red tilapia with different feeding frequencies reared with a biofloc system. The research method applied was experimental with four treatments and three replications. The treatment was the frequency of feeding, namely (A) 1 time/day, (B) 2 times/day, 3 times/day, and 4 times/day. Tilapia were reared for 56 days in a 100 L tank with a stocking density of 16 fish/tank. Initial size 3.71 ± 0.11 cm and weight 4.49 ± 0.021. Tilapia are reared with biofloc technology and given daily feed of 5%/weight of biomass/day. The results showed that rearing red tilapia with different feeding frequencies in the biofloc system had a significant effect (P<0.05) on growth performance, survival, and feed efficiency. Treatment B with a frequency of feeding 2 times/day was the best, with absolute growthof 23.07 ± 0.89 g, daily growth rate of 3.23 ± 0.05%, survival rate 91.66 ± 3.60%, and feed efficiency 96.73 ± 6.70%.

Chicken feather meals constitutes 80-85% protein, the main component being betakeratin, a fibrous and insoluble structural protein extensively cross linked by disulfide bonds. The keratins can not be absorbed directly in the digestive system, therefore a processing technique is required to make it more absorbable. Processing technique can be fermentation by microorganism Bacillus subtilis to degrade keratin by secretion of keratinase. The aim of this study was to examine fermentation of chicken feather meal with B. subtilis to improve the quality of fish feed ingredients. The treatments were: no-fermented; fermentation of chicken feather meals: 6, 8, 10, 12 and 14 ml inoculum fermentation using B. subtilis, respectively for chicken feather meal as much as 2 g. The results showed that the processing fermentation with 10 ml inoculum B. subtilis gives the best results in the highest keratinase activity (273.33 U/ml), increased the protein content of chicken feather meals (74.16 to 85.20%), but decreated of lipid content (2.44 to 1.42%) and carbohydrate content (7.86 to 2.05%) with a change in the physical properties of white -yellow (color), soft (texture), and less typical sting (smell).

Untuk meningkatkan pendapatan nelayan di Kampung Sungai Kayu Ara Kecamatan Sungai Apit Kabupaten Siak perlu diberikan mata pencaharian alternatif berupa budidaya ikan dengan menggunakan teknologi bioflok. Agar teknologi bioflok dapat diaplikasikan, maka masyarakat sasaran perlu diberi pengetahuan dan keterampilan melalui kegiatan penyuluhan. Kegiatan penyuluhan dilakukan untuk meningkatkan ilmu pengetahuan dan keterampilan masyarakat sasaran sehingga mereka dapat mengaplikasikan budidaya ikan dengan teknologi bioflok. Pelaksanaan penyuluhan menggunakan metoda ceramah, diskusi dan demontrasi terhadap berbagai materi yang disajikan. Dari hasil kegiatan diketahui bahwa masyarakat sasaran terlihat antusias terhadap kegiatan yang dilaksanakan, peserta mulai mengerti dan paham terhadap materi yang disajikan dan terjadi peningkatan pengetahuan peserta tentang budidaya ikan lele dengan teknologi bioflok antara 60-80%.

Most of the Kampung Harapan residents are farmers, namely farming corn, sweet potatoes, chilli, fruit, vegetables (such as spinach and kale) and fish farming. This village is prospective to be used as rearing sites for aquaponic systems. Aquaponic cultivation technology can be developed in limited area and water, and it also can increase business efficiency through the utilization of nutrients from the uneaten fish meal and the metabolism wastes of fish for vegetables, so it could be able to produce fish and vegetables optimally on narrow land and limited water sources, including in urban areas. Through the fish rearing with aquaponic systems, fish farmers will get two advantages in one production stage. This activity was carried out through discussion and practice, which the activity took place in the village office and in the home yard of the fish farmer group in Harapan Village. Extension activities involve fish farmers, plantation farmers and several students. The results of the activities showed that skills and knowledge of fish farmers increase regarding aquaponics fish farming and making pellets mix with gingger. Plastic fish ponds as a pilot project produce high yields of catfish and leafy vegetables, so it can be an alternative income for fish farmers.