Abstract
Environmental problems due to aquaculture occur along with the increase in aquaculture production. IMTA is one system used as a solution in dealing with environmental problems. The objective of this study was to analyze the growth performance, survival rate, and production of the main commodity (tilapia) and the supporting commodities (Peres, Lemeduk, and Depik) which are applied through the application of integrated multi-trophic aquaculture (IMTA) using floating net cages. This research was conducted at the Lukup Badak Fish Seed Center, Central Aceh from July to August 2020. The experimental design used was a completely randomized design (CRD) with 4 treatments and 3 replications, namely: A (tilapia), B (tilapia and peres), C (tilapia and lemeduk), and D (tilapia and depik). ANOVA test results showed that the IMTA system had a significant effect on absolute length growth, absolute weight growth, specific growth rate (SGR), survival rate, and biomass production of tilapia (P0.05). The results showed that maintenance for 42 days produced the highest value in treatment B with the increase in absolute length growth (4.26cm±0.24); absolute weight growth (5.47g±0.45), specific daily growth rate (2.28%/day±0.13) and the highest tilapia biomass production (480g/0.5m2±19.25). The highest survival rate was found in treatment C (82.42%±2.28). It was concluded that the treatment using the IMTA system was better than without the IMTA system.Keywords:IMTAWater qualityGrowth performanceTrophic interactionBiomass production
Highlights
Tilapia (Oreochromis niloticus) is a fishery commodity that has economic value and potential in aquaculture because it is able to adapt to environmental conditions with a wide range of salinity (Aliyas, et al, 2016)
Results from the ANOVA test showed that the parameters of absolute length growth, absolute weight growth, specific growth rate (SGR), tilapia biomass production, and tilapia survival had a significant effect on integrated multi-trophic aquaculture (IMTA) polyculture system (P
The highest absolute length growth of tilapia was found in treatment B (4.26 cm ± 0.24) and the lowest was found in treatment A (3.45 cm ± 0.07)
Summary
Tilapia (Oreochromis niloticus) is a fishery commodity that has economic value and potential in aquaculture because it is able to adapt to environmental conditions with a wide range of salinity (Aliyas, et al, 2016). Red tilapia has several advantages compared to other freshwater fish. These advantages are fast growth, easy to breed, willingness to eat all food ingredients (omnivores), wide adaptability and high tolerance to environmental conditions (Suwoyo et al, 2018; Iskandar et al, 2021). Fish cultivation using floating net cages is commonly found in Laut Tawar Lake, Aceh. According to Sambu and Amir (2017) the use of floating net cages for tilapia in lakes and reservoirs were widely developed as a source of freshwater fish production. Aquaculture system using floating net cages is one of the causes of aquatic environment degradation
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