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    Effects of Dietary Incorporation of Tetra (Cotinus coggygria) Extract on Immune Response and Resistance to Aeromonas hydrophila in Koi Carp (Cyprinus carpio)
    (Israeli Journal Of Aquaculture-Bamidgeh, 2014) Bilen, Soner; Yılmaz, Sevdan; Bilen, Asli Muge; Biswas, Gouranga
    In this study, immunostimulant effects of dietary supplementation of tetra (Cotinus coggygria) extract on the non-specific immune response, and protection against Aeromonas hydrophila infection in Koi carp (Cyprinus carpio) were investigated. Koi were fed with tetra extract incorporated diets containing 0 (Control), 0.5 (Te1), 1.0 (Te2) and 1.5 g/kg (Te3), for 30 days. At the end of the study there were no differences in the values of hematological parameters between treatments. However, red blood cell counts were significantly increased (P < 0.05) in Te2 group. Nitroblue tetrazolium activity was higher in all the treatment groups compared to the control, and highest values were recorded in Te3, Te1 and Te2 groups, respectively. Lysozyme and myeloperoxidase activity of the treatment groups was significantly enhanced compared to control (P < 0.05), and higher values of lysozyme and myeloperoxidase activity were seen in Te3, Te2 and Te1 groups, respectively. In the challenge study with A. hydrophila (108 CFU/ml) administered after 30 days of feeding where the Koi received Te3, Te2, Te1, and control diets, they had 13.3, 20.0, 26.7, and 40.0% mortality, respectively. Tetra extract supplemented diets enhanced the immunological responses and triggered the immune system of Koi carp against A. hydrophila infection.
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    Immunostimulant effects of Cotinus coggyria on rainbow trout (Oncorhynchus mykiss)
    (Academic Press Ltd- Elsevier Science Ltd, 2011) Bilen, Soner; Bulut, Musa; Bilen, Asli Muge
    In this study, non-specific immune effects of tetra (Cotinus coggyria) on rainbow trout (Oncorhynchus mykiss) by dietary intake were investigated. Fish were fed daily ad libitum with diets containing 0.5% and 1.0% tetra for 3 weeks. After this period, fish were switched back to the basal diet for additional 6 weeks. Extracellular and intracellular respiratory burst activities, phagocytosis in blood leukocytes, lysozyme activities, and total plasma protein levels were evaluated at the end of the tetra feeding period and every 3 weeks during the basal diet period. Extracellular and intracellular respiratory burst activities, phagocytic activity, lysozyme activity and total protein level parameters of the groups containing 0.5% and 1.0% tetra were higher than the control group at the end of the 3rd, 6th and 9th weeks, respectively (P < 0.05). The highest values of the non-specific immune parameters were observed in the group fed with 1.0% tetra. Tetra groups did not show any significant difference (P > 0.05) in terms of specific growth rate and average weight of the fish. (C) 2010 Published by Elsevier Ltd.