The Effects of Probiotics Administration on Silkworms (Tubifex sp) Natural Feed on Groowth of Kancra Fish (Tor soro)

Kancra fish (Tor soro) is a freshwater fish that has become scarce. This is seen from the decrease of its population in its natural habitat. To anticipate the decline of the kancra fish population. The method used in this research is completely randomized design (CRD) experimental methodology. Based on the results of the research that has been conducted, the administration of diffrent probiotic dosage in natural feed shows the best result in treatment C (probiotic 5%). This proves that the administration of different probiotic doses results in variations where treatment C (probiotic 5%) which has an average grow of 0,150 grams is different from treatment A (probiotic 1%) which has an average growth of 0,087 grams and treatment B (probiotic 3%) which has an average growh of 0.117 grams.