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    Pre-challenge and post-challenge haemato-immunological changes in Oreochromis niloticus (Linnaeus, 1758) fed argan oil against Lactococcus garvieae
    (Wiley, 2017) Baba, Esin; Acar, Umit; Yılmaz, Sevdan; Ontas, Canan; Kesbic, Osman Sabri
    The present study investigated the effects of argan oil, obtained from Argania spinosa, on pre- and post-challenge immuno-haematological and biochemical responses of Nile tilapia, Oreochromis niloticus. For this purpose, the fish were fed diets containing 0, 0.5%, 1% or 2% argan oil for 45days. Following 45days of feeding, fish were challenged with Lactococcus garvieae and mortality was recorded for 15days. During the pre-challenge period, significantly higher respiratory burst activity, total white blood cell (WBC), serum lysozyme activity and myeloperoxidase activity were determined in the argan oil-fed groups. The serum glucose and cholesterol levels decreased whilst total protein and albumin did not change in the groups fed with argan oil-supplemented diets. After challenge with Lactococcus garvieae, the percentage survival (%) was found to be the highest in the 1% and 2% argan oil-supplemented feeding groups. Also, there was a significant increase in weight gain, specific growth rate and feed conversion ratio in those fish fed argan oil. The results of this study indicated that after the supplementation of fish diets with argan oil, especially at 1% and 2% concentrations, the immunological, haematological and biochemical values remained similar in both the pre- and post-challenge periods and the immune response against L. garvieae in Nile tilapia was modulated.
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    Öğe
    The use of Avena sativa extract against Aeromonas hydrophila and its effect on growth performance, hematological and immunological parameters in common carp (Cyprinus carpio)
    (Taylor & Francis Ltd, 2016) Baba, Esin; Acar, Umit; Ontas, Canan; Kesbic, Osman Sabri; Yılmaz, Sevdan
    In this research the effects of oat Avena sativa extract on the non-specific immune system of common carp (Cyprinus carpio) was examined. For this purpose, the fishes (average weight 9.91 +/- 1.52 g) were fed with 5 g kg(-1), 10g kg(-1) and 20 g kg(-1) oat extract supplemented diets for 60 days. Following 60 days of feeding, the fishes were injected with Aeromonas hydrophila and mortalities were recorded. Lysozyme and myeloperoxidase activity, improved in all groups that received feed supplemented with oat extract. Serum glucose and cholesterol decreased while total protein and albumin in fish increased with the use of the diet supplement with oat extract. Haemoglobin (Hb), mean cell hemoglobin (MCH) and mean cell haemoglobin concentration (MCHC) increased with diet supplemented with oat extract. Oat extract at the concentration of 10 g kg(-1) showed significantly higher relative percentage survival (67%) when compared with the control against A. hydrophila injection. Also the dietary supplementation with oat extract caused a significant increase in growth parameters (final weight (FW), weight gain (WG), specific growth rate (SGR) and feed conversion ratio (FCR), when compared to non-supplemented control basal diet. The results suggest that A. sativa extract can be used as a feed supplement to enhance fish immune response and disease resistance against A. hydrophila.