AbstractMystus nemurus C.V is one of freshwater fish that inhabit the Banjiran swamps. To understand the type of food consumed by M. nemurus, a study has been conducted on February - March 2018. There were 100 fishes captured, that was consisted of 71 fishes with filled stomach and 29 fishes with empty stomach. Stomach content of the fish was analyzed as a basis to calculate the Preponderance Index (PI). Results shown that the main food of M. nemurus was fish (38%), the complementary food was unidentified debris (31%), and additional food was plant (24%), insects (4%), crustacean (1%), and domestic waste (2%). Keywords: Catfish, fish food, Index of Preponderance, Flooded Area
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