DOI: 10.36347/sajb.2018.v06i12.007

Pages: 781-786

The study about modification of the integrated multi-trophic aquaculture (IMTA) was examined by adding components of scavenger organism namely Vannamei shrimp (Litopenaeus vannamei). The purpose of this study is to compare the production abalone per unit volume of water between the integrated system of abalone and macroalgae (Ulva lactuca) with the integrated system of shrimp, abalone and ulva. The completely randomized design (CRD) was using with three treatments, i.e. a) biomass ratio of shrimp: abalone: ulva = 4: 1: 40; b) biomass ratio of shrimp biomass: abalone: ulva = 2: 1: 40; and c) biomass ratio of shrimps: abalones: ulva = 0: 1: 40 (as a control), with three replication respectively. The results of the variance analysis (ANOVA) showed that the ulva cultivated in condition of high nitrogen compounds from residual metabolites of shrimp, grew faster than the ulva cultivated without shrimp. Enhancement of the shrimp biomass in the system will increase the growth of ulva. Aquaculture systems with larger shrimp biomass will produce ulva with a higher protein content than ulva harvested from nature. Abalone is consuming ulva in an integrated aquaculture system with larger shrimp biomass, grew faster than abalone no consuming ulva cultivated without shrimp.