PERFORMA UDANG VANAME Litopenaeus vannamei (Boone, 1931) YANG DIPELIHARA PADA SISTEM BIOFLOC DENGAN SUMBER KARBON BERBEDA

ABSTRACT The intensive cultivation of Litopenaeus vannamei with biofloc systems is one of the most efficient way to reduce shrimp cost production, because the biofloc can be used as feed subtitution for L. vannamei cultured. The application of the biofloc system in commercial ponds is still experiencing many obstacles so that it is not optimal in supporting the success of cultivation. One of the factors that determine the success of shrimp farming with a biofloc system is the determination of the right organic carbon source. The objective of this research was to know the effect of addition of C-carbohydrate (wheat, tapioca, and mollases) on shrimp growth, survival rate, biomass, efficency of feed and feed conversion ratio of white shrimp L. vannamei. The design of the research was using a completely randomized design, consisted of three experimental treatments with four replications. The result of this research showed that the biofloc systems with addition of C-carbohydrate on growth performance of the shrimps were not significantly different (P>0.05) among those treatments. The biofloc technology with addition of C-carbohydrate using treatment B (wheat) showed higher survival rate (SR), biomass, feed conversion ratio (FCR), and feed efficiency were significantly different (P 0.05).  Penggunaan sumber karbon organik yang berbeda berpengaruh nyata terhadap tingkat kelangsungan hidup, biomasa, konversi pakan, maupun efisiensi pakan udang vaname.  Sumber karbon gandum menghasilkan tingkat kelangsungan hidup, biomassa, konversi pakan, dan efesiensi pemanfaatan pakan yang lebih baik dibandingkan dengan sumber karbon tapioka dan molase.  Penggunaan sumber karbon gandum dalam sistem biofloc menghasilkan nilai tingkat kelangsungan hidup 75,4±7,2%, biomassa 256,8±23,6g , FCR 1,3±0,1 dan efisiensi pemanfaatan pakan sebesar 74,9±7,3%. Kata kunci : biofloc, gandum, molase, tapioka