Dietary nucleotide supplements influence the growth,haemato‐immunological parameters and stress responses in endangered Caspian brown trout (Salmo trutta caspius Kessler, 1877) |
| |
Authors: | A Abedian Kenari N Mahmoudi M Soltani S Abediankenari |
| |
Institution: | 1. Department of Fisheries, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, , Noor, Mazandaran, Iran;2. Department of Aquatic Animal Diseases and Health, Faculty of Veterinary Medicine, University of Tehran, , Tehran, Iran;3. Departments of Microbiology and Immunology, School of Medicine, Mazandaran University of Medical Sciences, , Sari, Iran |
| |
Abstract: | A feeding trial was conducted to evaluate the effects of Optimûn, 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 Optimûn dietary nucleotide formula is recommended to promote growth and immunity as well as to enhance stress responses of Caspian brown trout. |
| |
Keywords: | Caspian brown trout dietary nucleotides blood parameters growth immune stress |
|
|