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Bacteria Isolation From Skin, Gills And Water When Treated With Different
Diet Studied In Oreochromis sp.
Nur Syuhada Binti Rosli
Supervisor: Dr. Nor Omaima Harun
Bachelor of Science (Biological Sciences)
School of Fundamental Science
The aim of this study is to determine the microbial community and the immunity of
fish when treated with different diets. 75 fish were treated with different diets in five
tanks. The treatment are by having the commercial pellet to be added whether with
oligochaete (Eisenia foetida), oyster mushroom (Pleurotus sajor-caju), pitcher plant
(Nepenthes gracilis) or combination of all of the ingredients. The fish is collected
randomly to analyze the bacteria in each week. The results of identification tests
showed 190 bacteria colonies from 12 species have been identified by using traditional
biochemical test. Three species are rarely found on fish. The bacteria are vary,
encompasses Gram-positive bacteria and Gram-negative bacteria with different
morphology and characteristics. In this study, fish have observed to secrete more
mucus (protein) than bacteria colony isolated to avoid invasion of pathogens. Thus,
the different diet utilization in fish have role in changing the microbial community and
increase the immunity of fish.
388 | U M T U N D E R G R A D U A T E R E S E A R C H D A Y 2018