Abstract
Optimal salinity on rearing media is needed to get the best production performance of climbing fish culture. The aim of this experiment is to get an optimal salinity on rearing media of climbing fish. This experiment was conducted in wet lab of Research Institute for freshwater Aquaculture and Fisheries Extension. The treatments were different salinities on rearing media; 0 ppt, 3 ppt, 6 ppt and 9 ppt. Each treatment has 3 replicates. Experiment design use completely randomized design. The initial weight of fish was 1 ± 0.11g and initial length of fish was 2 ± 0.3 cm. Aquaria of 40x22x20 cm was used for rearing media. Each aquarium with 15 lt of water was stocked 350 fish. Fish was fed frozen blood worm (protein contains of 62.5%) at ad libitum. Duration time of rearing was 40 days. Sampling was conducted every 10 day for fish weight, lenght and water quality. The result showed that optimal salinity of survivale rate, specific growth rate and total length were on salinity of 1.8 ppt, 2.5 ppt and 3.3 ppt. The value of water quality parameter in aquaria such as temperature, pH, Oxygen, nitrite, nitrate an amonia is still feasible for climbing fish rearing.
Highlights
Climbing fish (Anabas testudineus) is a kind of fresh water and brackish water specific local fish [1] and has high economic value in Sumatra and Kalimantan
Water quality condition is related to capability to get sucsesfully aquaculture
Data were analyzed using ANOVA for growth, survival rate and feed conversion while water quality was analyzed by deskriftive analysis
Summary
Climbing fish (Anabas testudineus) is a kind of fresh water and brackish water specific local fish [1] and has high economic value in Sumatra and Kalimantan. Culture technology is needed to develop a climbing fish production, any efforts of culture was conducted but production is still low. This case predicted caused of unsuitable water quality. Water quality condition affects fish physiology proccess so it can be a limited factor. Salinity will affect directly by osmotic pressure dan osmoregulation proccess. Kaneko and Hiroi [11] said omoregulation process is needed to control water balancing and ion between in the fish body and environment so physiology process in fish body works normally. Osmoregulation process was needed to control water balance of ions between fish body and environment so that physioligy process in fish body works normally [8, 11]. Many researchers conducted culture experiment of climbing fish, no one researcher did an optimal salinity on rearing media to get maximum productivity from rearing technology of climbing fish fry
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