Open AccessGrowth Response and Resistance to Streptococcus iniae of Nile Tilapia, Oreochromis niloticus , Fed Diets Containing Distiller’s Dried Grains with Solubles
Author(s) -
Lim Chhorn,
Garcia Julio C.,
YildirimAksoy Mediha,
Klesius Phillip H.,
Shoemaker Craig A.,
Evans Joyce J.
Publication year - 2007
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/j.1749-7345.2007.00093.x
Subject(s) - streptococcus iniae , oreochromis , nile tilapia , biology , tilapia , protein efficiency ratio , zoology , soybean meal , feed conversion ratio , meal , weight gain , food science , juvenile , body weight , fishery , fish <actinopterygii> , ecology , endocrinology , raw material
This study was conducted to evaluate the effect of dietary levels of distiller’s dried grains with solubles (DDGS) on growth, body composition, hematology, and resistance of Nile tilapia, Oreochromis niloticus , to Streptococcus iniae challenge. Five isocaloric diets containing DDGS at levels of 0, 10, 20, and 40%, and 40% DDGS + lysine (Diets 1–5) as partial replacements of a combination of soybean meal (SBM) and corn meal (CM) on an equal protein basis were fed to juvenile Nile tilapia (9.41 ± 0.14 g) for 10 wk. Fish fed Diet 4 had the lowest weight gain (WG), feed efficiency ratio, protein efficiency ratio (PER), and whole‐body protein. Supplementation of lysine to the 40% DDGS diet (Diet 5) improved WG and PER. Hematological and immunological parameters were not affected by dietary treatment. There were no significant differences among the average number of days to first mortality after S. iniae challenge and cumulative mortality 14 d postchallenge among fish in various treatments. DDGS can be incorporated in tilapia diet at a level of 20% as a substitute for a combination of SBM and CM without affecting their growth performance, body composition, hematological parameters, immune response, and resistance to S. iniae infection.