Analisis Fisika-Kimia Perairan dan Komunitas Bakteri terkait Kemunculan Penyakit Ice-ice pada Rumput laut (Kappaphycus alvarezii)

Abstract

Ice ice disease can attacks the seaweed group of karaginofit especially Kappaphycusalvarezii which affects discoloration on tallus, decreases carragenan quality, and makes the production of seaweed is low. Thus, ice ice disease must be controled by prevention method to increase the yield quality through detection and identification of this disease. The aims of this research to explore the ice ice causedbacteria diversity in K. alvarezii based on the depth-stratification in order to determine the best depth of seaweed cultivation to avoid ice ice infection. Isolationof the bacteria from K.alvarezii cultivation area carried with terraced dilutionand spread method. The data will be analyzed descriptively. The result of this research was known that the bacteria caused ice-ice disease was found in depth 20 meter. This bacteria had caragenase activity and selulase enzyme to attack K. Alvarezzi thallus.

Ice‐Ice disease: An environmentally and microbiologically driven syndrome in tropical seaweed aquaculture

“…This reduces exposure to temperature fluctuation and to air during low tides when compared to other methods. Cultivation of bacteria from water collected at inactive eucheumatoid cultivation sites with a history of IID incidence found that the water closer to the surface (depth 20-50 cm) contained carrageenan-hydrolysing bacteria (Bacillus, Vibrio) and potential opportunistic pathogens (Flavobacterium, Pseudomonas), which were not found in deeper water, 80 suggesting siting eucheumatoid farms in deeper water may limit exposure to potentially diseaseinfluencing bacteria.…”

Determination of Cultivation Method Based On the Quality of Seaweed (Kappaphycus alvarezii) in Sumenep District

“…Therefore, in Indonesian waters, K. alvarezii is one of the favorite seaweeds that are widely cultivated (KKP, 2010;Wulandari, 2016;Sahabuddin, 2008). However, the production of K. alvarezii in Indonesian waters is still fluctuating, this occurs due to seasonal changes, susceptibility to disease, pests, and infections (Hurtado, 2000;Wilson, 2013) resulting in a decrease in carrageenan quality and even causing crop failure (Tokan, 2009).…”