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    A novel source of calcium: effects of calcium pidolate concentration on egg quality in aged laying quails (Coturnix coturnix Japonica)
    (Cambridge University Press, 2022) Sarmiento-García, A.; Gökmen, S.A.; Sevim, B.; Olgun, O.
    Calcium content in the diet can affect egg quality and production in aged birds. Calcium pidolate is a new form of calcium supplementation in poultry diets, which favours the absorption of this mineral. The current study was conducted to evaluate the effect of dietary calcium pidolate concentration in the diets of aged laying Japanese quails. A total of 120 female quails (27 weeks old) were assigned to four treatment groups, each with six replicates of 5 quails per pen. In the 10-week trial, quail diets were supplemented with calcium pidolate at four concentrations (0, 0.25, 0.50, and 1.00 g/kg), providing 25.1 g/kg, 25.4 g/kg, 25.8 g/kg, and 26.5 g/kg calcium, respectively. As a result of this study, body weight (BW), feed intake (FI), and feed conversion ratio (FCR) did not change with the concentration of calcium pidolate (p>0.05). In contrast, albumen and yolk index decreased as calcium pidolate level increased (p<0.05). Moreover, calcium pidolate at a concentration of 0.50 g/kg resulted in the greatest egg production, eggshell breaking strength and eggshell thickness (p<0.05), while above these levels the factors studied were negatively affected. According to these results, the optimal concentration of calcium pidolate in the diets of aged laying quails was 0.50 g/kg.
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    The effect of organic copper Levels in breeding Japanese quail (Coturnix coturnix Japonica) diets on performance, egg quality, blood and incubation parameters
    (Hellenic Veterinary Medical Society, 2023) Cufadar, Yusuf; Curabay, B.; Gökmen, S. A.; Bahtiyarca, Y.; Sevim, B.
    This study was conducted to determine the effect of different levels of organic copper (organic Cu) supplementation on performance, egg quality, serum parameters and incubation characteristics in Japanese quail diets. 120 Japanese breeder quails of 7 weeks old were used in the study and lasted 84 days. Four diets containing different levels of organic copper (0, 75, 150 and 225 mg/kg) were used in the study. The study was a random design consisting of 20 subgroups with 5 replicates, and 4 females and 2 males were used in each subgroup. As a result of this study, final body weight and body weight gain in Japanese quails was significantly lower in the 75 and 150 mg/kg organic copper groups than in the groups containing 0 and 225 mg/kg copper (p<0.01; p<0.05). Egg production, egg weight, egg mass, feed intake and feed conversion ratio were not affected by dietary copper levels (p>0.05). Eggshell thickness and eggshell ratio were significantly higher in the groups containing 150 and 225 mg/kg organic copper than the control and 75 mg/ kg organic copper groups (p<0.05). Serum cholesterol level was significantly lower in 75 and 150 mg/kg copper groups compared to other groups (p<0.05). Serum albumin, globulin and total protein levels were significantly lower in the 75 and 150 mg/kg copper groups compared to the control group (p<0.01). Serum albumin and total protein concentrations were significantly higher in the 75 and 150 mg/kg copper groups thanthe other groups (p<0.01). The highest serum calcium (Ca) level was in the group containing 225 mg/kg copper (p<0.01). In the study, incubation parameters were not significantly affected by different copper levels in the diet. The results of the study showed that adding 150 mg/kg organic Cu to quail diets can be effective in improving eggshell quality and lowering serum cholesterol levels.
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    The evaluation of dietary application of conjugated linoleic acid on performance, egg quality, blood parameters, antioxidant capacity and egg yolk cholesterol parameters in layer quails
    (Hellenic Veterinary Medical Society, 2021) Gümüş, E.; Sevim, B.; Cufadar, Y.
    Conjugated linoleic acid (CLA) is a poly unsaturated fatty acid (FA) which is accepted as favorable for human health. The aim of this study is to ascertain the effects of CLA on performance, egg quality traits, egg yolk and albumin pH levels, blood serum biochemical parameters, egg yolk cholesterol content and blood antioxidant capacity in layer quails. 96 7-weeks-old female Japanese quails divided to 4 groups with 6 subgroups and the groups fed with basal diet supplied with 0 g/kg, 10 g/kg, 20 g/kg and 30 g/kg CLA respectively for 8 weeks. Our results indicated that CLA supplementation did not statistically affect performance, egg quality traits, egg pH levels, total antioxidant capacity in blood serum and yolk cholesterol content. Although dietary CLA did not significantly differ between groups for blood serum total protein, glycose, total cholesterol, triglyceride and high-density lipoprotein; lipoprotein lipase levels were significantly decreased in CLA supplemented groups (p<0.05). In summary, our results have shown dietary CLA supplementation might affect lipid metabolism and enzyme activity in female Japanese quails.