Open AccessApparent Protein and Energy Digestibility and Amino Acid Availability of Corn and Co‐products in Extruded Diets for Nile Tilapia, Oreochromis niloticus
Author(s) -
Vidal Luiz Vítor Oliveira,
Xavier Tadeu Orlandi,
Michelato Mariana,
Martins Elias Nunes,
Pezzato Luiz Edivaldo,
Furuya Wilson Massamitu
Publication year - 2015
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12184
Subject(s) - nile tilapia , oreochromis , corn gluten meal , dry matter , biology , gluten , tilapia , fish meal , food science , meal , ingredient , soybean meal , zoology , fish <actinopterygii> , fishery , raw material , ecology
We assessed the nutritional value of corn in extruded diets for Nile tilapia, Oreochromis niloticus , by determining the apparent digestibility coefficients of dry matter, crude protein, and gross energy, and by measuring the apparent availability coefficients ( AACs ) of essential and non‐essential amino acids ( AAs ) in several corn‐based diets. We fed 180 juvenile Nile tilapia a reference diet containing 325.8 g/kg crude protein and 4613 kcal/kg gross energy or a test diet containing a 70:30 mixture of the reference diet and a test ingredient (whole corn, corn germ, corn germ meal, corn gluten feed, or corn gluten meal). The apparent digestibility coefficients ranged from 56.3 to 96.6% (dry matter), 89.4 to 96.8% (crude protein), and 59.0 to 95.4% (gross energy). The AACs of all AAs exceeded 80% for all diets and were >90% for corn gluten meal. All ingredients showed high levels of apparent digestibility for crude protein and high AACs of AAs . Diets based on whole corn or corn gluten meal showed higher digestibility values for dry matter and gross energy, suggesting that they are preferable choices for Nile tilapia.