Growth and survival rate of Aaptos suberitoides and Petrosia sigricans in the circulatory system

Sponges are animals that can produce bioactive compounds. This use needs to be accompanied by sponge cultivation techniques to avoid decreasing the availability of sponge colonies in nature. This study aims to determine the growth rate and survival rate of sponges Aaptos suberitoides and Petrosia nigricans in a recirculation system and to determine the process of wound healing due to transplantation. The research was carried out in September – November 2010 at the Central Laboratory for Marine Science Studies – IPB University, North Jakarta. Sponges are taken from natural habitats and then transplanted into maintenance ponds. The center of the transplanted sponge fragment is passed through a polyethylene rope which is used as a substrate for the sponge. The survival of Petrosia nigricans is decreasing rapidly every week. At the 6th, week the viability of Petrosia nigricans was 0%. Meanwhile, Aaptos suberitoides has a value of 100% with several fragments of 20. The results of measurements of the Petrosia nigricans sponge for 12 weeks show an average and standard deviation of growth rate in length of -0.04±0.24 cm/week and width of 0.02±0.16 cm/week. Meanwhile, the Aaptos suberitoides sponge is 0.06±0.07 cm/week and 0.05±0.09 cm/week wide. Signs of wound closure in Petrosia nigricans were visible on the fourth day after transplantation, while Aaptos suberitoides experienced wound closure on the second day after transplantation. The measurement value for ammonia in the pool is 0.9542 mg/L, nitrate is 0.3544 mg/L, nitrite is 0.0060 mg/L and salinity is 28-38 0/00, and the temperature is 27-29 °C. The sponge Aaptos suberitoides has a better growth response and has a wider survival tolerance than the sponge Petrosia nigricans in maintaining survival in the recirculation system.