Haemato‐immunological and serum biochemical parameters,intestinal histomorphology and growth performance of rainbow trout (Oncorhynchus mykiss) fed dietary fermentable fibre (Vitacel®) |
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| Authors: | P Yarahmadi H Kolangi Miandare SH Hoseinifar |
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| Institution: | 1. Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran;2. Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran |
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| Abstract: | The aim of this study was to investigate the effects of dietary fermentable fibre (Vitacel®) on haemato‐immunological and serum biochemical parameters, intestinal histomorphology, growth performance and proximate body composition of rainbow trout (Oncorhynchus mykiss). One hundred and twenty fish (81.65 ± 1.49 g) were fed diets containing 0 and 10 g kg?1 fermentable fibre (Vitacel®) for 50 days. At the end of feeding trial, growth performance parameters were significantly improved in fermentable fibre (Vitacel®)‐fed fish. Although feeding on fermentable fibre (Vitacel®)‐supplemented diet had no remarkable effect on haematological parameters (RBC, Htc and Hb) (P > 0.05), white blood cell (WBC) count and monocyte level were significantly affected (P = 0.040 and P = 0.020, respectively). In case of serum biochemical parameters, a significant increase and decrease were observed in serum total protein (P = 0.040) and cholesterol level (P = 0.000), respectively. Also, lysozyme level was significantly increased following administration of Vitacel® in diet (P = 0.006). Histomorphological evaluations revealed that villus length (P = 0.004) and tunica muscularis thickness (P = 0.000) were significantly higher in fermentable fibre (Vitacel®)‐fed fish. These results indicate that fermentable fibre can be considered as a dietary supplement for improving the health status and performance of rainbow trout. |
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| Keywords: | biochemical parameters fermentable fibre growth performance haemato‐immunology rainbow trout Vitacel® |
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