Pinandoyo Pinandoyo

            Diets is the material that most costs production up to 70 % of operational costs. One effort that can be made to increase growth while reducing production costs is to add natural ingredients in the form of turmeric to the commercial feed. The purpose of the study was to discover the effects of additional turmeric extract (Curcuma longa LINN) as natural ingredients on the growth performance and survival rate of cobia (Rachycentron canadum). This research method used a completely random design with four treatments. Each treatment were to have different extract dose, A 0 ml/kg as a control, (extract dose B 5 ml/kg, C 10 ml/kg and D 15 ml/kg). The extract of Turmeric is sprayed on commercial feed according to dosage of each treatment. At the end of maintenance parameters observed include the absolute weight, food convertion ratio, specific growth rate, daily growth rate, feed intake, and survival. The result of observing the growth performance of cobia with additional extract turmeric, wich the optimum dose is 15 ml/kg capable of producing maximum absolute weight of 35,75 g, total lenght of  9,33 cm, Specific Growth Rate of 2,00 % ind. /day, Food Convertion Ratio of 0,75 %, Feed Intake of 655,33 g, Efficiency Feed of Utilization of 145,20 %, Protein Efficiency Ratio of 2,79 % and Survival Rate of 100%.   Keyword : Rachycentron canadum, Turmeric Extract, Growth, Survival Rate

Sea worms (Nereis sp.) is one of the natural feed that can increase the production of shrimp and fish eggs. DHA selco is a commercial product commonly used as an enrichment ingredient in natural feed to increase nutrient content. The purpose of the study was to find out the influence of sea worms (Nereis sp) enriched with DHA selco on the growth and survival of cobia fish and to find out the best dose of DHA Selco used for enriching Nereis sp. The study uses a complete randomized design with 4 treatment and 3 repeats. Addition of DHA selco in different dosi : A (without DHA selco), B (0.6 g./l DHA selco), C (0.9 g/l DHA selco), D (1.2 g/l DHA selco). The maintenance period of 21 days with a solid spread of 50 heads/hapa. Frequency of feeding 3 times a day, by method at satiation. The results showed that the addition of DHA selco had a real effect (P>0.05), Feed utilization efficiency, Relative Growth Rate, absolute length growth, biomass weight, Protein Efisiensi ratio and SR. Feed utilization efficiency , Relative Growth Rate value, absolute length growth, biomass weight, Protein Efisiensi ratio and Survival rate were highest in D treatment (1.2 g/l DHA selco) with consecutive values of 47.67±1.15 g/ day, 82.27±5.30 %, 16.47±1.22%, 4.07±0.15 %, 1.28±0.10 g, 2.43±0.09 %, 49.33±4.16%. Water quality during the study ranged still in optimal conditions for the growth of cobia fish, the temperature of 28.4-28.6 °C; pH 7.57; salinity 32-33 ppt; DO 5.12-5.33 mg/l.

Daphnia magna is a potential feed for fish. The aim of this research was to find the best treatment and effect of D. magna culture addition from fermented organic fertilizer, to growth and survival rate of Oreochromis niloticus larvae. There were five treatments, each with three repetitions used in the study. All treatments used chicken dung, and different combinations of rice bran, coconut oilcake waste and tilapia larvae. Feeding on tilapia was given by ad libitum method for five times a day until 14 days. Water quality during the research was maintained at temperature 28–29°C, DO 0.3 ppm and pH 8.1–8.2. Observed variables include relative growth rate, survival rate, food consumption rate and water quality. Our results showed that D. magna cultured by fermented organic fertilizer for tilapia larvae (O. niloticus) had high significant effect (p < 0.01) on the relative growth rate and survival rate. Treatment of D. magna cultured by 1.2 g/L chicken manure, 0.9 g/L rice bran and 0.3 g/L coconut oilcake showed the highest value on the relative growth rate (10.86%); survival rate (98.46%) and food consumption at first week (106.43%) and second week (152.76%)