Effects of noni leaf (Morinda citrifolia) on hematologic and physiological profile of carp (Cyprinus carpio)

Increasing immunity is one way to prevent disease attacks in fish. This study determined the impact of noni leaf powder (Morinda citrifolia) on the hematological and physiological profile of carp (Cyprinus carpio). The research was conducted from August to October 2022. As an experimental research, a completely randomized design with one factor (noni leaf powder feed supplements) was applied. Consists of 2 levels, namely the experimental unit (a1, 1.5 g/100 g feed of Hi Provit 781-2) and the experimental control unit (a0, 0 g/g feed of Hi Provit 781-2). Feed was fed to fish reared in floating net cages (FNC) at the hydroelectric power reservoir (HPR) of Koto Panjang. The hematological (total erythrocytes, hemoglobin levels, and hematocrit levels) and physiological profiles (absolute weight, specific growth rate, survival rate, and blood glucose) of carp were examined. The hematological profile of carp in a1 was significantly different from the carp in a0. The total erythrocyte average of carp at a1 was higher (1.61x10⁶ cells/mm³) than at a0 (1.44x10⁶ cells/mm³). The average hemoglobin level in a1 was higher (7.93 g/dL) compared to 6.53 g/dL in a0. The hematocrit level in a1 was 31.67%, slightly higher than a0 (30.33%). Compared to the fish in a0, the carp in a1 had a better physiological profile. In the treatment which used noni leafs the fish survival rate was marginally higher at 94.67%, compared to 91% in a0, blood glucose was 81.67 mg/dL, compared to 57.67 mg/dL in a0, absolute weight was 25.61 g, compared to 16.69 g in a0, and specific growth rate was 1.68%/day, compared to 1.53%/day in a0. It can be concluded that adding noni leaf extract to fish feed can be used as an effort to control carp disease in the future.