Optimization of Kappaphycus alvarezii seaweed seeding system by aquaculture

Kappaphycus alvarezii is the main commodity of the cultivation in Madura-East Java. The preparation of qualified seeds of seaweed is one of the efforts in increasing its production. Conventional method of water nursery that has been carried out has several weaknesses, which are susceptible to pest and fluctuationg climate. The application of aquaculture method is one of the main ways to improve the quality and quantity of seaweed seeds through nutrient enrichment and the optimization of environmental factors measured in seawater as media. Therefore, in this research, the media optimization of K. alvarezii seaweed seeding was carried out by aquaculture. The condition in optimizing seaweed seeding was determined by setting the culture condition according to the environmental parameters where seaweed was taken. The method used in this study was TMAMQ test to measure the antioxidant capacity, the total of phenol, biomass and TPC test. This result of this research was obtained through morphological observation of seaweed growth with the provision of a recirculation system, 0.05M urea and UV-filter showed the most excellent performance observed from the number of talus growth, in addition, UV-filter could help it inhibit the growth of microbes that were proven through total colony test in the medium of seawater after entering UV, it did not show microbial growth.