Open AccessReplacement of fishmeal by soy protein concentrate with taurine supplementation in diets for golden pompano ( T rachinotus ovatus )
Author(s) -
Wu Y.,
Han H.,
Qin J.,
Wang Y.
Publication year - 2015
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.12161
Subject(s) - feed conversion ratio , fish meal , weight gain , biology , food science , zoology , meal , fish <actinopterygii> , protein efficiency ratio , commercial fish feed , body weight , fishery , aquaculture , endocrinology
Two 7‐week feeding trials were conducted to evaluate the capacity of golden pompano ( Trachinotus ovatus ) to use soy protein concentrate ( SPC ) as a dietary fish meal substitute. In trial I, fish were fed with a control diet (C) containing 400 g kg −1 fish meal and other four diets in which the fish meal in diet C was replaced by SPC at 20 (R20), 40 (R40), 60 (R60) and 80% (R80). In trial II , a 3 × 2 design was used, and 40 and 80% of the fish meal in diet C were replaced by SPC , with or without 5 g kg −1 taurine supplementation (six diets, C + T, R40 + T, R80 + T, C, R40 and R80, were formulated). In trial I, no significant difference was found in the feed intake between feeding treatments. The weight gain and nitrogen retention efficiency ( NRE ) decreased, whereas the feed conversion ratio ( FCR ) and phosphorus retention efficiency ( PRE ) increased, with decreasing dietary levels of fish meal. No significant differences were found in the weight gain, FCR and NRE between fish fed diets C and R20, whereas fish fed diets C and R20 had higher weight gain than those fed diets R40, R60 and R80. In trial II , no significant differences were found in the feed intake, weight gain, FCR , NRE and PRE between fish fed diets C + T and C. No significant differences were found in the feed intake, weight gain and NRE between fish fed diets R40 and R40 + T or between fish fed diets R80 and R80 + T. At the end of trial II , no significant differences were found in the condition factor, hepatosomatic index and body composition between fish fed diets C and C + T, or between fish diets R40 and R40 + T, or between fish fed diets R80 and R80 + T, except that fish fed diet R40 had lower body protein content than that of fish fed diet R40 + T. The present study reveals that taurine supplementation can elevate fish meal replacement level by SPC in the golden pompano diets. Fish meal can be reduced from 400 to 320 g kg −1 , if fish meal is substituted by SPC without taurine supplementation, and can be further reduced to 240 g kg −1 , if fish meal is substituted by SPC with 5 g kg −1 taurine supplementation.