Digestibility and amino acid availability of three protein-rich ingredient-incorporated diets by Murray cod Maccullochella peelii peelii (Mitchell) and the Australian shortfin eel Anguilla australis Richardson

In this study, the apparent dry matter (ADM), protein (PD) and energy (ED) digestibility, and the amino acid availability (essential, EAAA; non-essential, NEAAA; total, TAAA) of diets incorporated with one of three protein-rich ingredients (soybean meal, shark meat meal waste and meat meal) were evaluated for Murray cod Maccullochella peelii peelii (Mitchell) and the Australian shortfin eel Anguilla australis Richardson. The reference diets (RDs) used for Murray cod and shortfin eel had 50% and 45% protein, and 10% and 15% lipid respectively. The test diets consisted of 30% ingredient and 70% RD, and digestibility estimations were made using chromic oxide as a marker.