Journal of Biology and Nature

This research aims to know the role of maggot flour protein as a fishmeal protein source replacement on growth performance and survival of common carp (Cyprinus carpio) and the optimum dose from artificial maggot flour feed. This research take a place at Aquaculture Laboratorium of Diponegoro University in 23 January – 6 March 2023. The experimental method using complete randomized design (RAL) consisting of 4 treatments 3 repetitions. The treatment is applied with percentage maggot flour substitution 0%, 10%, 20%, and 30% per gram of feed. The substitution set according to carp protein sufficient (30 – 35%), so that carp does not having excess protein that can effect on growth performance. The test fish used was common carp with an average size of 4.54 ± 0.23 cm with an average weight of 0.75 ± 0.03 gr/head. The experimental containers using a aquarium tank with size of 45cm x 30cm x 22.5cm. Stocking density per aquarium is 0.5 fish/liter with a maintenance period of 42 days. The experimental using feeding methods 5% of biomass with a frequency 3 times/day. The experimental results showing that substitution of artificial maggot flour feed for common carp is significantly influential (P<0.05) on specific growth rate (SGR), feed conversion ratio (FCR), and survival rate (SR) of common carp. Based on experimental, the best dose substitution artificial maggot flour feed has been shown in treatments C (20%) and D (30%). Treatment C produced SGR 1.93 ± 0.04 and FCR 2.41 ± 0.07 and treatment D produced SGR 1.97 ± 0.09% and FCR 2.34 ± 0.12. The results of observations during the research showed that common carp fed with the experimental feed (substitution of maggot flour for artificial feed 0%, 10%, 20%, 30%) had a high survival rate with an average survival rate above 90%.