期刊
AQUACULTURE NUTRITION
卷 19, 期 1, 页码 54-63出版社
WILEY
DOI: 10.1111/j.1365-2095.2012.00938.x
关键词
Caspian brown trout; dietary nucleotides; blood parameters; growth; immune; stress
类别
资金
- Tarbiat Modares University, Tehran, Iran
- University Research Deputy
A feeding trial was conducted to evaluate the effects of Optimun, a commercial nucleotide (NT) product, on the growth, haemato-immunological and serum biochemical parameters and stress responses of Caspian brown trout fingerlings (average initial weight of 12.26 g). A basal diet was supplemented with levels of 0 (control), 1.5, 2.5, 3.5 and 5 g NT kg-1 to formulate five experimental diets. After 8 weeks of feeding trial, fish fed diet with 2.5 g NT kg-1 had the highest final weight compared with other treatments. The fish fed diets with 2.5 g NT kg-1 had higher blood protein, albumin, albumin/globulin ratio, red blood cells, white blood cells and lymphocyte content and lower alkaline phosphatase. The lysozyme activity in serum was found to be significantly (P < 0.05) greater in fish fed diet with 2.5 g NT kg-1. Concerning both stressors (confinement and salinity stress), fish fed diet with 2.5 g NT kg-1 had lower plasma cortisol and glucose levels. Thus, administration of 2.5 g kg-1 of the Optimun dietary nucleotide formula is recommended to promote growth and immunity as well as to enhance stress responses of Caspian brown trout.
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