Analysis of Protein Content and Amino Acid Profile in Fish Feed Made from Maggot Meal and Earthworm Meal

Abstract

Amino acids were the main components of protein with great potential in feed for fish growth and survival. Some fish feed ingredients sourced from animal protein that can reduce the use of fish meal are maggot and earthworms. The purpose of this study was to determine the protein content and amino acid profile through the use of maggot meal and earthworm meal in fish feed. The use of maggot meal was substituted from 5% to 20%, while earthworm meal was substituted by 4%. Fish feed formulation with ratio of fish meal (FM), maggot meal (MM) and earthworm meal (EM) was tested based on several ratios, namely F1 (30% FM and 5% MM, 4% EM); F2 (25% FM, 10% MM and 4% EM); F3 (20% FM, 15% MM and 4% EM); F4 (15% FM, 20% MM and 4% EM). The results showed that the protein content produced ranged from 23.65% to 26.66%. Glutamic acid had the greatest amino acid profile across all formulations, followed by aspartic acid, arginine, and lysine. Protein content and amino acid profile in the treatment formulas F3 (15% MM and 4% EM) and F4 (20% MM and 4% EM) always occupy the highest position, while the combination ratio of F1 (5% MM and 4% EM); F2 (10% MM and 4% EM) were generally always in the lower position. This shows that the results of the amino acid profile content of the second combination of this type of natural animal source have increased in line with the increase in the addition of maggot meal.