Nasmia Nasmia , Radjuddin Syamsuddin , Alexander Rantetondok , Elmi N. Zainuddin

1.Department of Aquaculture, Faculty of Animal Husbandry and Fisheries, Tadulako University, Palu, Central Sulawesi, Indonesia
2.Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, South Sulawesi, Indonesia
Author    Correspondence author
International Journal of Aquaculture, 2014, Vol. 4, No. 23   doi: 10.5376/ija.2014.04.0023
Received: 24 Apr., 2014    Accepted: 21 May, 2014    Published: 21 Aug., 2014

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Nasmia et al., 2014, Characterization and Identification of Bacteria Isolated from Seaweed Gracilaria verrucosa (Linn., 1758) Infected by Ice-ice, International Journal of Aquaculture, Vol.4, No.23: 1-7 (doi: 10.5376/ija.2014.04.0023)

Ice-ice disease in cultivated algae occurs due to pathogenic bacterial infections.  Generally, ice-ice disease is characterized by whitening of the branches and initiated with the color changes of the thalli becomes transparent. This study was aimed to isolate and identify bacteria on seaweed Gracilaria verrucosa infected with ice-ice.  Isolated bacteria was inoculated in Tryptic Soy Agar (TSA) and Thiosulphate Citrate Bile Sucrose (TCBS). Morphological and biochemical characterization of the bacterial isolates revealed eight species of bacteria were found in infected thalli including Acinetobacter sp., Pseudomonas sp., Bacillus sp., Micrococcus sp., Corinoverm sp., Cytophaga sp., Vibrio mimicus and V. Campbelii, but not allidentified bacteria are pathogens on Gracilaria verrucosa. The pathogenic bacteria were Acinetobacter sp, Pseudomonassp, Bacillus sp, Cytophaga sp. and Vibrio sp. The symptoms of ice-ice disease are generally characterized by bleaching thalli at the base, middle and end of the young thalli, which begins with change of thalli color into white transparent.

Gracillaria verrucosa; Pathogenic bacteria; Ice-ice disease; Indonesia