Open AccessReplacement of fishmeal by two types of fish protein hydrolysate in feed for postlarval shrimp Litopenaeus vannamei
Author(s) -
Quinto B.P.T.,
Albuquerque J.V.,
Bezerra R.S.,
Peixoto S.,
Soares R.
Publication year - 2018
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12605
Subject(s) - fish meal , shrimp , hydrolysate , biology , litopenaeus , tilapia , food science , commercial fish feed , aquaculture , hydrolysis , fish <actinopterygii> , biochemistry , fishery
After filleting of tilapia, the material remaining is discarded and this waste represents about 700 g/kg of fish body volume, corresponding to carcass and viscera. These leftovers are important sources of proteins that can be used as feed in aquaculture industry by producing protein hydrolysates. In this study, two protein hydrolysates of tilapia were produced, with one ( FPH 1) and two ( FPH 2) hours of hydrolysis. The nutritional composition of the hydrolysates showed desirable levels of crude protein and essential amino acids. Electrophoresis revealed peptides ranging from 10 to 250 kD a. In addition, caseinolytic activity was recorded by zymogram. The hydrolysates were incorporated separately in experimental diets to replace fishmeal at distinct levels: 0, 40, 80 and 120 g/kg, totalizing seven diets named 0 (control), 40H 1 , 80H 1 , 120H 1 , 40H 2 , 80H 2 and 120H 2 . A 45‐day feeding trial was carried out to evaluate the zootechnical performance of postlarvae fed these diets. In conclusion, the use of FPH 2 as a substitute for fishmeal promotes better shrimp growth than FPH 1 and allows higher levels of substitution. In addition, it is recommended a 60 g/kg fishmeal replacement by FPH 2 to improve growth.