https://www.researchgate.net/publication/305699172_Marine_algae_of_the_South_China_Sea_bordered_by_Indonesia_Malaysia_Philippines_Singapore_Thailand_and_Vietnam
size, while a density of 3000 PL m⁻³ achieved the highest production output in the integrated system. In the second experiment, which followed the 30-day growth trial, shrimp quality was assessed via an immersion challenge test using pathogenic Vibrio parahaemolyticus (a concentration of 2 × 10⁸ CFU mL⁻¹) on the shrimp groups previously stocked at a density of 3000 PL m⁻³ and integrated with different quantities of seaweed. After 14 days of challenge, the cumulative mortality in the monoculture system averaged 75.6%, which was significantly higher (p < 0.05) than those in the integrated groups (17.8–31.1%). It is concluded that the integration of P. monodon shrimp and G. tenuistipitata improved tank water quality as well as shrimp survival and growth while also enhancing the antibacterial activity of shrimp against V. parahaemolyticus infection in the nursery phase.
The results were obtained 5 tons/ha of seaweed from the initial density of seaweed 1 ton/ha after 3 months of maintenance with daily growth rate of 4.18%/day. Vannamei shrimp growth of 0.5 gram to 16.7 gram/fish, shrimp production from 1 ton/ha to 3,5 tons/ha. Based on the economic analysis showed gain with the value of R/C ratio of 1.83 and Rentability of 80.08%. This research can be concluded that the presence of seaweed as biofilters generally will increase the specific growth rate of Vannamei shrimp. The biofiltration method is more likely, given the application is very simple, high adaptability, easy maintenance, and economic value increase.
[INFOMINA] Benefits When Farming Integrated Shrimp Seaweed
Some algae that can be used in shrimp polyculture have an acceptable economic potential. The macroalgae Kappaphycus alvarezii, which has been co-cultured with shrimp, has a commercial value because it is the prime material used to produce carrageenan (Lombardi et al. 2006), a product widely used in the food industry as a thickening and stabilizing agent. Gracilaria salicornia has commercial value as an agar source and duckweed (Lemnaceae sp.) is used as a high-protein fish feed that thrives in nutrient-rich waters, such as aquaculture effluent (Ruenglertpanyakul et al. 2004). The algae Ulva clathrata, which has been cultivated in shrimp aquaculture waste water, shows a high biofiltering efficiency, uptake and assimilation of nitrogenous compounds (Da Silva-Copertino et al. 2009); in addition, this alga is commonly used in Asiatic countries as food for human consumption (Zemke-White & Ohno 1999).
Similar results can be achieved with algae. A number of aquatic plants have chitinase enzymes with antifungal activity (Shirota et al. 2008). For instance, the seaweed Gracilaria sp., which has been used in integrated polyculture with shrimp, possesses antimicrobial activity (Sasidharan et al. 2009). Kappaphycus sp., another species used in shrimp polyculture, has been shown to possess antiviral and antibacterial properties (Trono 1999). The sole presence of Gracilaria textorii in aquatic environments has been shown to decrease the number of Vibrio sp. (Pang et al. 2006). However, there is not enough information about the effect of seaweed on bacterial counts and on the incidence of viruses in shrimp culture
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