Substitution of Maggot Meal (Hermetia illucens) in Feeds to The Growth Performance and Survival Rate of Goldfish (Carassius auratus)

Protein, a macromolecular component, is relatively expensive in artificial feed because it originates from fishmeal. The study was conducted to determine and compare the effect of maggot meal in the experimental feed with commercial feed on the growth performance and survival of goldfish (Carassius auratus), and it was conducted for 30 days. This study used an experimental method, complete randomized design (CRD), including 4 treatments with 3 replicates. The treatments in this study include A as a control (commercial feed) and test feed B, C, and D, each of which has a maggot meal substitution level (g/kg test feed) of 150, 175, and 200 feed, respectively. The experimental fish in this study is goldfish with an average initial weight of 3.2 ± 1.38 grams per fish. The maintenance tank for goldfish in this study used an aquarium with a water level of 50 cm. Growth performance data taken included specific growth rate (SGR), total feed consumption (TFC), feed conversion ratio (FCR), feed utilization efficiency (FUE), and survival (SR). The results showed that substituting maggot meal in the feed had a significant effect (P<0.05) on SGR, TFC, FCR, and FUE but no effect on survival. Based on the results, the best substitution dose of maggot meal that has results close to the control treatment is 175 g/kg, which can produce SGR (0.55%/day), FUE (21.90%), FCR (3.44), TFC (26.67 grams), and SR (80%). Therefore, the 175 g/kg maggot meal can be an alternative ingredient of feed-based fishmeal for goldfish.