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    Impact of manganese hydroxychloride on egg quality, antioxidant capacity, bone characteristics, and mineral excretion in laying quail
    (The University of Agronomic Sciences and Veterinary Medicine of Bucharest, 2024) Olgun, Osman; Kılınç, Gözde; Gül, Esra Tuğçe; Gökmen, Fatih; Yıldız, Alpönder; Uygur, Veli; Sevim, Behlül; Sarmiento-Garcia, Ainhoa
    This research investigated the impact of different concentrations of manganese hydroxychloride (MnH) on productive performance, egg quality, antioxidant status, tibia characteristics, and mineral excretion in laying quails. A total of 125 female ten-week-old female quails, were divided into five groups with five subgroups, each containing five quails. The birds were fed isoenergetic and isonitrogenous diets with different levels of MnH (containing 55 g/100 g Mn) at 18.86 mg/kg (basal diet), 40, 60, 80, and 100 mg/kg for twelve weeks. Results indicated that MnH supplementation enhanced egg production and feed intake (P < 0.05) compared to the non-supplemented group. The optimal eggshell quality, including shell- breaking strength, thickness, and weight, was observed at 80 mg/kg MnH (P<0.01) compared to the basal diet. Regarding the antioxidant capacity in the yolk, the yolk's 2,2- diphenyl-1-picrylhydrazyl (DPPH) value increased significantly (P<0.01) with 100 mg/kg MnH supplementation, while malondialdehyde (MDA) values remained unaffected across all groups. Increasing dietary MnH levels elevated Mn excretion in faeces and reduced copper levels (P<0.01). However, MnH addition adversely affected tibia biomechanical properties compared to the basal diet (P<0.01), with no significant impact on tibia mineral accumulation (P>0.05). These results suggest that including 80 mg/kg MnH in laying quail diets would be adequate to improve certain aspects of production and eggshell quality, although its impact on bone parameters requires further investigation.
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    Performance and meat quality characteristics of male quails (Coturnix coturnixjaponica) fed diets supplemented with pomegranate seed oil
    (Consejo Superior de Investigaciones Científicas, 2023) Sarmiento-Garcia, Ainhoa; Gökmen, Seyit A.; Sevim, Behlül; Olgun, Osman
    Pomegranate seed oil (PSO) is a nutritive, antioxidant-rich by-product, and it has been tested as a feed ingredient for livestock. However, studies on quails are scarce. The current study investigated that the effect of PSO on the performance and meat instrumental quality of quails. Area of study: Turkiye. Material and methods: A total of 60 seventy-day-old male quails were equally subjected to 3 dietary treatments con-sisting of 20 birds (5 replicates with 4 birds each). The quails were fed a diet supplemented with 0, 100, and 200 mg kg-1 pomegranate seed oil (PSO). After 10 weeks, two birds per subgroup were randomly selected and slaughtered. Main results: Supplementation of PSO reduced (p<0.05) feed intake and body weight gain linearly. However, there was no significant effect of PSO on carcass traits. For color parameters, the L* and b* values of breast and thigh meat increased with the addition of PSO to the diet (p<0.05). Cooking losses were highest in the thigh of quails fed 200 mg kg-1 PSO. On the other hand, in the breast, the lowest values for this parameter were observed in the groups that had received 100 mg kg-1 of PSO. Research highlights: Including 100 mg kg-1 of PSO can improve some meat quality characteristics without affecting performance parameters. There is a possibility that meat quality could be negatively affected by values higher than this. Nevertheless, further research is needed to determine the optimal dose of PSO to improve quail meat quality and its performance.
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    The use of purple carrot powder in the diet of laying quails improved some egg quality characteristics, including antioxidant capacity
    (Springer Science and Business Media B.V., 2023) Sarmiento-Garcia, Ainhoa; Olgun, Osman; Kılınç, Gözde; Sevim, Behlül; Gökmen, Seyit Ahmet
    The goal of the current experiment was to investigate the effect of dietary concentrations of purple carrot powder (PCP) on performance, egg production, egg quality, and the antioxidant capacity of the yolk in laying quails. A total of one hundred and fifty 22-week-old Japanese laying quails were allotted to 5 dietary treatments each with 6 replicates of 5 quails. Quails were allocated to five dietary treatments (0, 0.1, 0.2, 0.3, and 0.4%) with PCP addition at an increasing level from 0 to 4000 mg/kg diet respectively, which were fed ad-libitum throughout the duration of the experiment. No differences were detected between dietary treatments for any of the performance parameters or egg production. Eggshell weight and eggshell thickness (P < 0.05) were linearly affected by PCP dietary, reaching maximum levels at 0.4% of PCP supplementation, while the percentage of damaged egg and egg-breaking strength remained similar for all experimental groups (P < 0.05). Quails receiving PCP diets showed a yellowness (b*) (P < 0.05) egg yolk color than those fed the control diet, without affecting the rest of the color parameters and egg internal quality. Increasing PCP levels in diets reduced linearly yolk TBARS (P < 0.01) and increased linearly DPPH (P < 0.01). The addition of PCP, a safe and readily available agricultural by-product, as a component of the diet of laying quail was effective without adversely affecting quail production. Moreover, the inclusion of PCP in the diet might benefit laying quails’ eggs by improving some quality traits and enhancing the yolk’s antioxidant capacity, which could improve their shelf-life and acceptability.