NDLI: Dietary threonine requirement of juvenile Nile tilapia, Oreochromis niloticus

Content Provider	Springer Nature Link
Author	Yue, Yirong Zou, Zhiying Zhu, Jinglin Li, Dayu Xiao, Wei Han, Jue Yang, Hong
Copyright Year	2014
Abstract	An 8-week feeding trial was conducted to determine the dietary threonine requirement of juvenile Nile tilapia Oreochromis niloticus. Six isonitrogenous and isoenergetic diets were formulated to contain graded levels of threonine, 0.73, 0.91, 1.14, 1.31, 1.56 and 1.72 % of dry weight, respectively. Each diet was randomly assigned to triplicate groups of 25 juvenile fish (2.97 ± 0.02 g), which were fed three times daily (8:30, 12:30 and 17:00) to apparent satiation. By the end of the feeding trial, weight gain (WG) was found to have increased with increasing dietary threonine levels up to 1.31 %, but WG then decreased in fish fed higher dietary threonine concentrations. Threonine concentration had no significant impact on survival, body composition or the measured haematological and immune parameters. There were, for example, no significant differences in serum lysozyme activity, superoxide dismutase activity, immune globulin M concentration and C-reactive protein content among dietary treatments. Using quadratic regression analysis of WG data, the optimal dietary threonine inclusion for juvenile tilapia was estimated to be 1.33 % of the diet (4.74 % of dietary protein).
Starting Page	1457
Ending Page	1467
Page Count	11
File Format	PDF
ISSN	09676120
Journal	Aquaculture International
Volume Number	22
Issue Number	4
e-ISSN	1573143X
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-03-02
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nile tilapia Threonine requirement Weight gain Haematological parameters Freshwater & Marine Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Agronomy and Crop Science

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