Potensi Bakteri Proteolitik Aeromonas caviae NU-4 dan Aeromonas sp. NU-8 sebagai Pengendali Pertumbuhan Microcystis aeruginosa BT-02 pada Ikan Mas ( Cyprinus carpio)

Abstract

Cyanobacteria arc a group of phytoplankton that are commonly found in bodies of fresh water in all over the world. Cyanobactcria produce toxins such as microcystin, which is produced by Microcystis aeruginosa which causes the death of fish. This study was conducted to know the potency of proteolytic bacteria, isolated from digestive tract of tilapta fish strain GIFf, which have an ability to inhibit the growth of M. aeruginosa BT-02. The isolates of proteolytic bacteria, which have the ability to inhibit the growth of M. aeruginosa BT-02, are i.e Aeromonas caviae NU-4 and Aeromonas sp. NU-8. The inhibition index that is produced by NU-4 (1.71) was higher than NU-8 (1.34). The inhibition mechanism is still unknown. Toxicity test revealed that there were not aoy carp fish which died during the experiment, but there were some histological changes observed in liver and intestinal of treated carp fish with M. aeruginosa cells.