Budidaya ikan secara intensif, dengan padat penebaran dan dosis pemberian pakan yang tinggi akan mengakibatkan penurunan kualitas air budidaya, dimana sisa pakan dan sisa metabolisme ikan pada wadah budidaya, akan menghasilkan toksin berupa amonia sehingga dibutuhkan sistem budidaya yang dapat mereduksi toksin. Akuaponik merupakan salah satu sistem budidaya yang mampu mereduksi toksin di perairan dengan cara mempertahankan kualitas air selama periode tertentu tanpa mengganggu pertumbuhan ikan yang dipelihara dengan menggunakan tanaman sebagai biofilter. Tanaman akuaponik yang sering digunakan pembudidaya adalah tanaman yang memiliki akar serabut, antara lain kangkung air, sawi, selada. Jenis-jenis tanaman tersebut dapat memanfaatkan unsur hara yang ada dalam air media budidaya dari hasil buangan bahan organik oleh bakteri nitrifikasi berupa nitrat untuk pertumbuhan tanaman yang dibudidayakan. Adapun jenis ikan yang sering digunakan dalam sistem akuaponik adalah ikan mas, nila, lele, bawal dan patin. Ikan mas (Cyprinus carpio L.) pada saat ini merupakan ikan air tawar yang paling tinggi produksinya dan sudah dibudidayakan secara komersil. Penelitian telah dilakukan untuk mengetahui pertumbuhan ikan mas (C. carpio) pada media biofilter dengan menggunakan jenis tanaman berbeda. Ikan mas yang digunakan dalam penelitian berukuran 5 – 7 cm. Penelitian didesain dengan menggunakan pola rancangan acak lengkap (RAL) 4 perlakuan (sebagai biofilter, yaitu tanaman sawi, kangkung, selada dan tanpa tanaman sebagai kontrol. Semua perlakuan diulang sebanyak 5 kali. Hasil penelitian menunjukan bahwa penggunaan biofilter tanaman sawi memberikan pertumbuhan bobot mutlak tertinggi pada ikan mas.

Banggai Cardinalfish (Pterapogon kauderni) is one of the endemic fish from the waters of the Banggai Islands, Central Sulawesi Province. One factor challenging the production of P. kauderni larvae is the male fish will nurture the eggs and larvae for 30 days, hindering next spawning cycle. One effort to overcome this problem an increase of male fish number should be performed, for example through sex reversal. This study aimed to determine the effectiveness of the hormone 17α-methyltestosterone (17α-MT) through Artemia sp. to increase male sex percentage P. kauderni. This study used a completely randomized design by testing four treatments namely feeding Artemia sp. which has been soaked with 2.0 mg of the 17α-MT hormone for two- hours given to P. kauderni larvae for 10 days (A); 20 days (B); 30 days (C), and without hormone treatment 17α-MT (control). Each treatment included control was performed in triplicates. The percentage of male sex was 93.33 % at 30 days treatment and was higher (P<0.05) compared to controls (53.3 %). Additionally, the results showed that daily growth rate, biomass gain and survival rate of all treatments were not significantly different (P>0.05) with those of control. In conclusion, Artemia sp. contained 17α-methyltestosterone enhanced male percentage of P. kaurderni. Keywords: growth, male percentage, Artemia sp., survival rate, Pterapogon kauderni

Lake Rano has abundant water resources, one of which is Nilem fish (Osteochilus hasselti). However, the abundance of Nilem (O. hasselti) has not been appropriately utilized and has become a pest in the local community's fishery activities. This study aimed to examine the potential of Nilem (O. hasselti) in terms of nutrient content as a local raw material in making the fish feed to support fish farming activities in Lake Rano. The method in conducting the research was initiated by taking samples of Nilem fish directly from the waters of Lake Rano, then drying the whole fish (without cleaning), and mashing it. Furthermore, testing the nutrient content of fish meal as a test sample. The analysis showed that the whole Nilem fish meal had a protein content of 39.62%, a fat content of 1.4%, a carbohydrate content of 31.7%, an ash content of 17.9%, and a moisture content of 9.38%. It can be concluded that Nilem fish (O. hasselti) has the potential to be used as a substitute for the primary raw material as a source of animal protein for making fish feed, especially in Lake Rano.

The climbing perch (Anabas testudineus) is an economically valuable freshwater fish. Relatively slow growth has been a challenge in the domestication of this species in Indonesia. Nutrition, including feed lipid content, is one factor affecting growth. This study examined the effect of enriching feed with fish oil on the growth and survival of climbing perch (A. testudineus) fingerlings. The research was carried out at the Water Quality and Aquatic Biology Laboratory, Faculty of Animal Husbandry and Fisheries, Tadulako University, Palu, Central Sulawesi, Indonesia from 17 December to 18 January 2020. A completely randomized design (CRD) was used with 4 treatments and 5 replicates. The fish oil feed enrichment treatments were: A (control, 0%); B (1%); C (2%) and D (3%). Water quality remained within the optimum range throughout the research period. Over the month, climbing perch absolute weight gain ranged from 2.4±0.981 g (A) to 3.4 ± 0.836 g (D), while growth in length ranged from 0.404±0.092 cm (A) to 0.504±0.071 cm (D); however, the differences were not statistically significant (P0.05). The survival rate of climbing perch over the one month study period was 100% under all treatments, indicating that basic nutritional needs were met. Enrichment of a commercial feed with fish oil (Scott’s emulsion) at rates of 1-3% did not provide a significant benefit in terns of climbing perch fingerling growth.

Penelitian ini dilakukan untuk mengetahui jenis pakan yang memberikan kelangsungan hidup dan pertumbuhan yang tinggi pada larva Pterapogon kauderni pasca pelepasan dari mulut induknya. Penelitian didesain menggunakan tiga perlakuan meliputi; pemberian pakan komersial (A), udang rebon/Acetes (B), dan rotifer/Rotifera sp. (C). Setiap perlakuan diberi tiga kali ulangan. Pakan diberikan sebanyak tiga kali dalam sehari (pagi, siang dan sore hari) secara at-satiation. Lama pemeliharaan dilakukan selama satu minggu. Hasil analisis menunjukkan laju pertumbuhan harian tertinggi terjadi pada perlakuan B (1.39±0.92%), dan berbeda secara signifikan (P<0.05) dengan perlakuan A (0.90±0.02%). Pertambahan biomasa tertinggi terjadi pada perlakuan C (0.005 g) dibandingkan perlakuan lainnya (A=0.003 g, B=0.003 g). Kelangsungan hidup untuk semua perlakuan tidak berbeda secara signifikan (P>0.05). Sebagai kesimpulan, jenis pakan yang memberikan kelangsungan hidup dan pertumbuhan tertinggi pada larva ikan P. kauderni pasca pelepasan dari mulut induknya adalah rotifer.