International Journal of Engineering Applied Sciences and Technology, 2019 Vol. 4, Issue 5, ISSN No. 2455-2143, Pages 6-12 Published Online September 2019 in IJEAST (http://www.ijeast.com) 6 PERFORMANCE OF RECIRCULATION SYSTEM IN THE DOMESTICATION AND REARING OF JUARO FISH FINGERLINGS (Pangasius polyuranodon) Niken Ayu Pamukas Mulyadi, Adelina, Santhy Wisuda Sidauruk Department of Aquaculture Department of Aquaculture Faculty of Fisheries and Marine Science, Riau University Faculty of Fisheries and Marine Science, Riau University Pekanbaru, Riau, Indonesia Pekanbaru, Riau, Indonesia Abstract-- The study on the implementation of water resirculation system to domesticate and to grow out juaro fish fingerlings (Pangasius polyuranodon) has been carried out. Several filter materials were used into four kinds of treatment, namely aquarium using aerators (control), aquarium using spons, aquarium using carcoal and palm fiber as well as aquarium using zeolite. Results of the study showed that different filter materials were significantly affecting in the juaro fish fingerling culture media. As long as adaptation period (one week), juaro fish fingerling (Pangasius polyuranodon) could be weaning to consume fish meal by involving other fish species in the same culture media. It was found that treatment of water resirculation system combining with zeolite increased water quality parameters such as DO (3.9-4.56 mg/L), CO2 (8.6-9.15 mg/L), NH3 (0.02-0.10 mg/L), NO2 (0.01-0.08 mg/L), NO3 (0.01-0.09 mg/L) respectively, however, pH and temperature did not differ significantly. The best results were achieved at the same treatment especially absolute weight (9.24 g), absolute length (5.14 cm), specific growth rates (1.76 %), biomass (62.23 g), food efficiency (28.07%), FCR (3.45%) and survival rate (86.67 %). Keywords-- Pangasius polyuranodon, domestication, recirculation, growth I. INTRODUCTION Juaro fish (Pangasius polyuranodon) belongs to family Pangasidae [1] does not have scales, and the fish has hard and sharp dorsal fin [2]. The fish has soft and delicious meat and the price is quite expensive, so it is prospective to fish farming. To fulfill the demand for juaro fish (P. polyuranodon) caught uncontrollably resulting disruption of fish habitat and are feared extinct. To prevent the extinction of the fish domestication and culture should be given priority in order to conserve this fish. For farming activities could be implemented continuously investigations on domestication of the fish is to be done successfully [3]. The food habits [4] and reproduction of juaro fish (P. polyuranodon) [3] have been reported from the Musi River. Through the efforts of domestication, the fish are expected to adapt to the controlled environment and can accept artificial feed and survive at high density. In this context best technologies to be investigated to optimize resource utilization including artificial feed and natural feeds to rear the adults and youngones to produce quality fingerlings to ensure continuous supply to the aquaculture activities for marketing and consumption. Intensive aquaculture techniques to accelerate the growth of juaro fish as well as to improve the water quality must be applied for the success of domestication, spawning, larval rearing, nursery and grow out phases. To improve the water quality in accordance with the conditions needed by fish screening, deposition and absorption techniques are followed. Materials such as sand, gravel, charcoal, palm fiber, pulp lime, alum, stone, zeolite and others [5] along with aeration and water recirculation. Recirculation systems using a wide variety of filter material is an innovation technology expected to reduce waste and increase productivity. Principally, this technology is to conserve land and water use as well as to increase business efficiency through the utilization of nutrients from uneaten food and waste of fish metabolism, and environment friendly fish culture. The study aims to provide information to the fishermen about the techniques of domestication and rearing of juaro fish on limited land and water resources with a recirculation system. The study is expected to reveal the appropriate food to be given at the various domestication stages under a closed recirculation system by using various types of filters to improve water quality and also to find out the best recirculation technology in domestication and rearing of juaro fish.