Pengaruh Substitusi Silase Ikan Rucah Dengan Persentase Yang Berbeda Pada Pakan Buatan Terhadap Efisiensi Pakan, Pertumbuhan Dan Kelulushidupan Benih Ikan Mas (Cyprinus Carpio)

Problems arising in the cultivation of carp is carp feed prices are relatively expensive, requiring alternative materials in an effort to improve the nutrient content of feed goldfish and fisheries as well as to utilize the waste to be processed into fish silage research aims assess the effect of the addition of trash fish silage the artificial feed on protein efficiency ratio, the efficiency of feed utilization, relative growth rate and survival rate of carp seed. The method used in this research is the experimental method. The material used is a seed carp with an average individual weight of 0.9 to 1 g. Experimental design used was completely randomized design (CRD) with 4 treatments and each with three replications. Feed given 3 times a day ie at 07.00, 13.00, and 16.00. Treatment A, B, C, and D is applied artificial feed trash fish silage added with a dose of A (0%), B (5%), C (10%) and D (15%)%. The variables measured were EPP, PER, RGR and SR. EPP values for treatments A, B, C, and D, respectively, 22.77; 34.65; 29.84, and 24.68%. PER values for treatments A, B, C, and D, respectively, 1.01; 1.40; 1.16, and 0.79%. RGR values for treatments A, B, C, and D, respectively, 3.72; 5.02; 4.48, and 3.91% / day. SR values for all treatments A, B, C, and D is 100%. Water quality values for all the treatment that the water temperature 25-27oC, pH 6.9 to 7.5, DO 5-7mg / L, and ammonia 0.39-1mg / L. The results showed that a different dose of rumen silage has a highly different significant result (P 0.05) to SR carp juvenile

The Improvement of the Survival, Growth and Production of Vaname Shrimp (Litopenaeus Vannamei) and Seaweed (Gracilaria Verucosa) Based on Polyculture Cultivation

The presence of aeration on the cultivation of polyculture system can eliminate oxygen depletion at night while the intensity of light would effect the seaweed Gracilaria verucosa to perform photosynthesis. The supplies of oxygen is to eliminate the oxygen depletion at night until morning, and propose the efficiency of feeding activity, and also stabilize the water quality. The purpose of this research is to improve the survival, growth and production of vaname shrimp, and Gracilaria verucosa. This research was conducted in Jepara Brackishwater Aquaculture Research and Development Center (BBPBAP), from May until August 2013. A number of 75 shrimps and 1,750 g Gracilaria vericosa were cultivated in the 800 L tank, which observed for 96 days. There are four type of treatments, oxygen supply O1 (3,500 lux light intensity), O2 (Aeration with 700 mL minute-1 speed), O3 (light intensity and aeration), O4 (without light and aeration), three replications. This research was conducted using an experimental Randomized Block Design. The survival rate and growth of shrimp (Litopenaeus vannamei) showed a highly significant (p < 0.01) different between the treatments, while the growth and biomass production of seaweed (Gracilaria verucosa) showed a significantly (p < 0.05) different. The three treatments of oxygen and light supply, aeration and the combination of light and aeration, it can be concluded that survival, growth and production of vaname shrimp and Gracilaria verucosa. The combination of light and aeration treatment is the best, it can be concluded survival rate of shrimp (94.64%) compare to the treatment without oxygen (45.24%). Absolute growth rate of shrimp increased from 9.57 g to 12.97 g. The specific growth rate of shrimp increased from 4.73% to 5.07%. The biomass production of shrimp increased from 181.56 g m-2 to 883.95 g m-2. The combination of light and aeration can improve the absolute growth rate of Gracilaria verucosa from 25.86 g to 52.724 g. The specific growth rate of seaweed increased from 1.77% to 2.64% then biomass production of Gracilaria verucosa also to increase from 2,557.76 g to 5,063.2 g

Mariculture Based on Thropic Saprobic Index Analysis (Case Study: Coast of Sayung Distric Demak, Central Java Indonesia)

Coastal erosion in Sayung Distric, Demak Regency submerged 300 hectares of brackish water ponds. However, after the local government management by soft and hard barriers construction resulting the formation of semi-closed coastal water area with the depth of 1 – 7 m in depth. The condition of the this eroded coastal water is physically degraded, idle and abandont. The aims of this research were to evaluate ecological condition of the eroded coastal water at Sayung for coastal aquaculture based on its Trophic Saprobic Index values. The research was carried out from September 2009- August 2010. The results show that the eroded coastal water at Morosari, Sayung District Demak Central Java is lightly to moderately polluted, however, ecol[ogically it is still suitable for coastal aquaculture activity, especially for cultured organisms which are at the lowest level of the food chain/the plankton feeder