Molluscicide of fentin acetate (C20H18O2Sn) is commonly used at the present due to effective in terms to control of molluscs in the rice field. The aims of this experiment is to determine toxicity effect of fentin acetate on growth, productivity, and blood glucose on the common carp, Cyprinus carpio cultured at rice field water. A 12 of rice field plots with size of 25m2 each were used. The stocking density of common carp was 25 fish/m2 for each rice plot. The culture period of the common carp was 21 days. The different fentin acetate concentration as treatments were as followed M0) without molluscicide; M1) 0.375 g/L of molluscicide; M2) 0.75 g/L of molluscicide); and M3) 1.5 g/L of molluscicide. Statistical analysis using one-way ANOVA with three replicates for each treatment was performed. The result showed that the treatment of molluscicide at 0.75 g/L was significantly different to the others on survival rate and productivity (p<0.05). Application of 0.75 g/L of molluscicide showed a positive correlation on blood glucose value.

Fentin acetate is used as a pesticide in rice fields to eradicate pests. Research with physiological factors approach is expected to increase the survival rate and growth performances of tilapia. The purpose of this study was to determine the impact of different concentrations of fentin acetate on the biological performance and hematological characteristics of tilapia (Oreochromis niloticus). The research used 16 rice fields with a 30 m2 each (6 x 5 m). The research design used a completely randomized design with four treatments and three replications: A. 0.00 g L−1, B. 0.375 g L−1, C. 0.75 g L−1 and D. 1.5 g L−1. The results showed that treatment C resulted in the best growth of tilapia. It was noted that absolute weight gain, daily growth rate and productivity were significantly different (P<0.05) with treatments A, B and D. The highest value in treatment C were 20.53 g (absolute weight gain), 5.43 (daily growth rate) and 501.58 g (productivity). The survival rate in treatments B and C were not significantly different (P>0.05) as well as treatments A and D. The concentration of molluscicide fentin acetate at a dose of 0.75 g/L affected the decrease in the hematological characteristics of tilapia.

Water quality is the main factor that should have been considered in the part of aquaculture where the fish will grow in the optimal environment circumstances that suit biological demands. Adding the aeration aims to increase dissolved oxygen and turbulence. The objectives of this study is to see how different aeration rates affect the survival and growth of Mahseer Tor soro. The research used 12 aquariums, each sizing of 66x24x30 cm. Fish’s stocking density was three individuals per Liter for each aquarium. The randomization design was completed with four treatments and three replicates. The different aeration rate as a treatment were A) 0; B) 1000; C) 2000; and D) 3000 ml/minute. The results show that the highest absolute length (1.73±0.611 cm) and survival rate (98.33%) at 1000 ml/minute were the highest where the blood profile such as blood glucose, the hematocrit, haemoglobin, and erythrocyte values at 1000 ml/minute was the lowest compared to other treatments (P<0.05). The best of aeration rate for seed culture of masher, Tor soro is 1000 ml/minute, which has resulted in dissolved oxygen is ranging from 7.05–7.71 mg/L.

Indonesian shortfin eel, Anguilla bicolor bicolor is one of the eel species that high market demand both for local and export. Feeding frequency is an important that related to production for culture. The purpose of this experiment is to determine the optimal feeding frequencies on survival and growth of shortfin eel at glass eel to elver stages cultured in a recirculating aquaculture system. Four treatments of different feeding frequencies and three replicates each were performed. The treatments were as followed A) 1 time a day; B) 2 times a day; C) 3 times a day; and D) 4 times a day. The result showed that the feeding frequency affect the survival, length and weight growths, and glucose value. The best of survival rate (82.61±3.15%), weight (1.91±0.28 g) and length (10.64±0.45cm) found at feeding frequency 3 times a day compared to the others (P<.0.05). Blood glucose value increases with increasing feeding frequency. Water quality such as dissolved oxygen (DO), temperature and pH were within the optimal range. Three times a day of feeding frequency is recommended for applying on glass eel culture in a recirculating aquaculture system.