Abstract
Recent increases in feed ingredient costs have motivated the fisheries industry to identify technologies that will improve feed utilisation and reduce the cost per pound of gain. The effects of two supplemental exogenous enzymes (Natuzyme® and Hemicell®) on the growth performance in Caspian salmon (Salmo trutta caspius) were examined over an 8-week feeding trial. After the experimental period, the survival rate ranged from 91.33 ± 1.15 % in controls to 96.67 ± 1.15 % in the group that received 0.5 g Natuzyme® kg−1 + 0.5 g Hemicell® kg−1 (NH) in their diet and there was a statistical difference between experimental and control groups (p < 0.05). Growth rate was significantly higher in the NH group (1.01 ± 0.01) than the other groups (Sig. = 0.00). The best feed conversion rate (0.64 ± 0.01) was in the NH group and it was significantly lower than the control group, the 0.5 g Natuzyme® kg−1 group, and the 0.25 g Hemicell® kg−1 group (Sig. = 0.03). The best final body weight (80.68 ± 5.27) was observed in the NH group. Also, WBC count (7,716.67 ± 348.80 N/mm3) was significantly higher in the NH group compared to the control (6,916.67 ± 194.10 N/mm3; p < 0.05). No difference was observed in haematocrit%, haemoglobin, red blood cell, mean corpuscular volume, mean corpuscular haemoglobin, and mean corpuscular haemoglobin concentration (p > 0.05). The results suggested that enzyme supplementation caused significant improvement on growth performance and feed utilisation in Caspian salmon.
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ali Zamini, A., Kanani, H.G., azam Esmaeili, A. et al. Effects of two dietary exogenous multi-enzyme supplementation, Natuzyme® and beta-mannanase (Hemicell®), on growth and blood parameters of Caspian salmon (Salmo trutta caspius). Comp Clin Pathol 23, 187–192 (2014). https://doi.org/10.1007/s00580-012-1593-4
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DOI: https://doi.org/10.1007/s00580-012-1593-4