Person: SÖZCÜ, ARDA
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SÖZCÜ
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ARDA
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Publication Changes in ph of digestive tract and cecal microflora composition in broilers fed with probiotic and prebiotic supplementation (SynerAll).(Oxford Univ, 2016-10-01) İpek, Aydın; Sözcü, Arda; İPEK, AYDIN; SÖZCÜ, ARDA; Ziraat Fakültesi; Zootekni Bölümü; FCM-0798-2022; HXQ-7280-2023Publication Eggshell temperature during early and late incubation affects embryo and hatchling development in broiler chicks(Elsevier, 2022-08-27) Sözcü, Arda; İpek, Aydın; van den Brand, Henry; SÖZCÜ, ARDA; İPEK, AYDIN; Ziraat Fakültesi; Zootekni Bölümü; AAA-5866-2020; FCM-0798-2022This study aimed to investigate effects of eggshell temperature (EST) during early and late incubation on embryo and hatchling development of broiler chicks. A total of 720 eggs were randomly allocated to 3 treatment groups: control EST (37.8 degrees C during the first 14 d and 36.8 degrees C between d 15 and 21 of incubation), early high EST (as control, but 38.9 degrees C between d 4 and 7), and late high EST treatment (37.8 degrees C during the first 14 d and 38.2 degrees C between d 15 and 21). At d 18 of incubation, the length of the femur, tibia, and metatarsus were found to be lower in the early high EST treatment than in both other treatment. Hatchability was higher in the early high and control EST treatment than in the late high EST treatment (Delta = 4.2% on average; P = 0.02), whereas the opposite was found for late term embryonic mortality (Delta = 4.0% on average; P = 0.02). Navel score was higher for the late high EST treatment than for the early high EST and control treatment (1.36 vs. 1.19 and 1.17, respectively; P < 0.001). At hatch, chick weight, and organ weights were lower in the late high EST treatment than in the control treatment, with the early high EST treatment in between. At hatch, most femur, tibia, and metatarsus characteristics were lower for the early high EST treatment compared to both other treatments. The same was found for tibia ash, Ca, and P concentrations. Blood ALP and P levels were higher in the control group than in both other treatment groups. It can be concluded that early high EST particularly affected bone development during incubation, whereas late high EST particularly resulted in a decline in hatchability and chick quality in broiler chicks.Publication The effects of high setter and hatcher temperatures during incubation on slaughter weight and carcass yield in broilers(Tübitak Bilimsel ve Teknolojik Araştırma Kurumu, 2015-01-01) İpek, Aydın; Sözcü, Arda; İPEK, AYDIN; SÖZCÜ, ARDA; Ziraat Fakültesi; Zootekni Bölümü; AAH-2551-2021; AAA-5866-2020; AAH-3973-2021This study was carried out with the aim of determining the effects of higher setter and hatcher temperatures on slaughter weight and carcass yield. In experiment 1, setter temperatures were applied as control (37.8-38.2 degrees C) and high (38.9-40.0 degrees C) between days 10 and 18 during incubation. In experiment 2, hatcher temperatures were applied as control (36.8-37.0 degrees C) and high (38.8-39.0 degrees C) during the hatching period. A total of 240 chicks from each experiment were randomly selected after the hatching process was complete. At the end of the growing period, a total of 120 broilers from each experiment were weighed and slaughtered at 42 days of age. The carcass weight was lower in the higher temperature groups in both experiments. In the higher setter temperature group, the breast weight was lower with a value of 981.4 g, but the percentage of breast was higher with a value of 45.59%. In experiment 2, the weight and the percentage of breast was similar in the control and high hatcher temperature groups. In conclusion, slaughter weight and carcass yield are affected by higher setter and hatcher temperatures.Publication Changes in ph of digestive tract and cecal microflora composition in broilers fed with probiotic and prebiotic supplementation, synerAll.(Oxford Univ Press Inc, 2016-10-01) İpek, Aydın; Sözcü, Arda; İPEK, AYDIN; SÖZCÜ, ARDA; Ziraat Fakültesi; Zootekni Bölümü; FCM-0798-2022; HXQ-7280-2023Publication Comparison of performance, egg quality, and yolk fatty acid profile in two Turkish genotypes (Atak-s and Atabey) in a free-range system(Mdpi, 2021-05-15) Sözcü, Arda; İpek, Aydın; Oğuz, Züleyha; Gunnarsson, Stefan; Riber, Anja B.; SÖZCÜ, ARDA; İPEK, AYDIN; Ziraat Fakültesi; Zootekni Bölümü; 0000-0002-0955-4371; DUR-2892-2022 ; FCM-0798-2022Simple SummaryIn recent years, consumers have shown increased interest in healthy and safe food produced under improved animal welfare standards. Therefore, production systems proving outdoor access have gained popularity, increasing the need for knowledge on genotypes suitable for free-range systems. This study aimed to investigate the suitability of two Turkish layer genotypes, Atak-S (brown) and Atabey (white), in a free-range system. We evaluated laying performance, egg quality parameters, and yolk fatty acid profile. The egg production was higher in Atabey than Atak-S, whereas the eggs from Atak-S hens tended to be heavier and had a stronger shell structure than eggs from Atabey hens. Furthermore, eggs from Atabey hens had improved egg yolk and albumen content compared to eggs from Atak-S hens. The total saturated fatty acid content in yolk was higher in Atabey eggs than in Atak-S eggs at 56 weeks of age, whereas a higher yolk color score was observed in Atak-S eggs than in Atabey eggs. Our results could help free-range egg producers to improve production, as well as satisfy consumer demands regarding egg quality in organic production.Consumer interest in buying eggs from animal welfare-friendly systems with outdoor access is increasing, leading to an increase in the need for knowledge on genotypes suitable for free-range systems. Two Turkish laying hen genotypes, Atak-S (brown, n = 210) and Atabey (white, n = 210), were reared in a free-range system from 19-72 weeks of age, and their suitability for the system was assessed based on laying performance, egg quality, and yolk fatty acid profile. Mean hen-day and hen-housed egg production were found to be higher in Atabey than Atak-S (p < 0.01). The brown eggs from Atak-S hens tended to be heavier than the white eggs from Atabey hens (p < 0.01). Brown eggs obtained from Atak-S hens had a stronger shell structure (p < 0.01), while white eggs from Atabey hens had higher mean yolk index, albumen index, and Haugh unit than brown eggs (p < 0.05). At 56 weeks of age, total saturated fatty acid content in yolk was higher in white eggs than in brown eggs (p < 0.01). These findings related to genotype could help free-range egg producers in their choices for more profitable production and for meeting consumer demands on egg quality and egg yolk fatty acid levels.Publication Comparison of behavioral time budget and welfare indicators in two local laying hen genotypes (atak-s and atabey) in a free-range system(Mdpi, 2022-01-01) Oğuz, Züleyha; Gunnarsson, Stefan; Riber, Anja B.; Ipek, Aydın; İPEK, AYDIN; Sözcü, Arda; SÖZCÜ, ARDA; Ziraat Fakültesi; 0000-0002-0955-4371; FCM-0798-2022; DUR-2892-2022Simple Summary It is known that laying hens kept in cage systems without access to enrichment have more welfare and behavioral problems. Therefore, alternative systems for egg production have gained popularity, e.g., free-range and organic systems, as they improve the birds' possibilities to perform important specific behavior and thereby increase the welfare conditions in commercial farms. This study aimed to compare of the behaviors and welfare of two layer genotypes used in Turkey, Atak-S (brown) and Atabey (white), in a free-range system from 19 to 72 weeks of age. We evaluated multiple welfare indicators, including behavioral time budget, fear level, plumage condition, keel bone damage, and other body lesions. The birds were scored at 24, 40, 56, and 72 weeks of age. The Atabey hens showed more preening, walking-standing, and resting behavior, and they had a longer duration of tonic immobility. The Atak-S hens tended to perform more feather pecking and explorative pecking, and they had more foot lesions, plumage damage, skin injuries, and keel bone damages. Current results can be beneficial for the choice of genotype to use in free-range systems. Free-range systems are considered to improve bird health and welfare, thereby satisfying consumer demands. Behavioral time budget, fear level and clinical welfare indicators were compared for two Turkish laying hen genotypes, Atak-S (brown) and Atabey (white), reared in a free-range system. A total of 420 laying hens (210 Atak-S, 210 Atabey) were studied between 19 and 72 weeks of age. Higher percentages of eating and drinking behavior, feather pecking, and explorative pecking were observed for Atak-S hens, whereas Atabey hens were preening, walking-standing, and resting more. The duration of tonic immobility was longer, and the number of inductions was lower in Atabey compared with Atak-S hens. Atabey hens had less keel bone damages and better plumage conditions on the breast, wing, and tail at 56 and 72 weeks of age than Atak-S hens. Footpad dermatitis was more common in Atabey hens at 40 weeks, whereas Atak-S hens had a higher prevalence of footpad dermatitis with moderate lesions at 72 weeks of age. These findings indicate that free-range Atak-S hens may be more prone to keel bone damage and development of feather pecking, but they showed less foot lesions and were less fearful.Publication The effects of different eggshell temperatures between embryonic day 10 and 18 on broiler performance and susceptibility to ascites(Facta-fundacio Arnco Ciencia Tecnologia Avicolas, 2015-07-01) İpek, Aydın; İPEK, AYDIN; Şahan, U.; ŞAHAN, ÜMRAN; Sözcü, A.; SÖZCÜ, ARDA; Ziraat Fakültesi; AAH-2966-2021; AAH-3973-2021; AAA-5866-2020; AAH-2551-2021The aim of the current study was to determine the effects of low (33.3-36.7 degrees C), control (37.8-38.2 degrees C) and high (38.9-40.0 degrees C) eggshell temperatures (ESTs) between days 10-18 of incubation on broiler performance and susceptibility to ascites. The effects of different ESTs on hatchling weight were significant. The highest residual yolk sac weight (7.7 g) and relative yolk sac weight (18.7%) were observed in high EST group, whereas the highest yolk-free body weight (36.22 g) was obtained in the control group. Relative post-hatch heart weight was lower in the high EST group (0.64%) compared with the control (0.84%) and low (0.88%) EST groups. At 6 weeks of age, body weights of broilers of the low, control, and high EST groups were 2172.6, 2543.9, 2282.6 g respectively. During the 6-week life span, the feed conversion ratio of broilers in the low (1.86) and high (1.83) EST groups was significantly worse than of those in the control EST group (1.68). Higher packed cell volume (PCV) and red blood cell (RBC) values were obtained in the high EST group relative to the other groups, whereas hemoglobin (Hb) level was lower in the control group than in the others. The relative heart weights and right ventricular to total ventricular (RV: TV) ratio for low, control, and high EST group were 0.46, 0.40, 0.37 g and 0.27, 0.28, 0.33% respectively. In conclusion, incubation length, yolk sac absorption, residual yolk sac weight, yolk-free BW, post-hatch performance, and heart, blood parameters, abdominal fluid accumulation at slaughter age are affected by changes in EST between incubation days 10 to 18.Publication Nutritional value of microalgae and cyanobacteria produced with batch and continuous cultivation: Potential use as feed material in poultry nutrition(MDPI, 2023-11-01) Uğuz, Seyit; Sözcü, Arda; UĞUZ, SEYİT; SÖZCÜ, ARDA; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü; 0000-0002-3994-8099; 0000-0002-0955-4371; ABH-7275-2020; DUR-2892-2022Recently, the demand for new alternative feedstuffs that do not contain chemical residue and are not genetically modified has been increased for sustainability in poultry production. In this respect, the usage of algae as animal feed is very promising as an alternative feed ingredient that reduces pollutant gases from animal production facilities. The aim of the current study is to investigate the usage possibility of algae, through determining nutritional value and production cost, as a feed ingredient in poultry nutrition. Three microalgae species, including Scenedesmus sp., Ankistrodesmus sp., and Synechococcaceae, were produced with batch and continuous cultivation to determine the difference in the lipid, protein, carbohydrate, fatty acid, and amino acid profiles, as well as the color characteristics and production cost. The highest lipid content of 72.5% was observed in algae biomass produced from Synechococcaceae with batch cultivation, whereas the highest protein level was found in algae biomass produced by Synechococcaceae under continuous cultivation practice (25.6%). The highest content of PUFA was observed in Scenedesmus sp. harvested from both batch and continuous cultivation (35.6 and 36.2%), whereas the lowest content of PUFA was found in Synechococcaceae harvested with continuous cultivation (0.4%). Continuously cultivated of Scenedesmus sp. had higher carbohydrate content than batch-cultivated Scenedesmus sp. (57.2% vs. 50.1%). The algae biomass produced from Synechococcaceae was found to have a higher content of essential amino acids, except lysine and histidine, compared to Scenedesmus sp. and Ankistrodesmus sp. Cultivation practices also affected the amino acid level in each algae species. The continuous cultivation practice resulted in a higher level of essential amino acids, except glycine. Synechococcaceae had richer essential amino acid content except for proline and ornithine, whereas continuous cultivation caused an incremental increase in non-essential amino acids. The lightness value was found to be the lowest (13.9) in Scenedesmus sp. that was continuously cultivated. The current study indicated that Scenedesmus sp. could be offered for its high PUFA and lysine content, whereas Synechococcaceae could have potential due to its high content of methionine and threonine, among the investigated microalgae and Cyanobacteria.Publication Effects of dietary inclusion of probiotics and prebiotics (SynerAll) on growth performance and serum biochemical parameters in broilers.(Oxford Univ Press Inc, 2016-10-01) İpek, A.; Sözcü, Arda; Akay, V.; SÖZCÜ, ARDA; Akay, V.; Ziraat Fakültesi; Zootekni Bölümü; FCM-0798-2022; HXQ-7280-2023Publication Both the rooster line and incubation temperature affect embryonic metabolism and hatchling quality in laying hen crossbreds(Oxford Univ Press, 2019-06-01) van den Brand, H.; van de Kraats, S. J. F.; Joerissen, R.; Heetkamp, M. J. W.; van den Anker, I; Ooms, M.; Kemp, B.; Sözcü, Arda; SÖZCÜ, ARDA; Veteriner Fakültesi; Hayvan Bilimleri Bölümü; AAA-5866-2020Effects of 3 eggshell temperatures (EST; 36.7. 37.8, and 38.9 degrees C) in 2 genetic laying hen crossbreds (AB and BB; same hen line, different rooster line) on embryonic metabolism and hatchling quality were investigated. EST were applied from day 14.5 of incubation (E14.5) until hatching. The experiment consisted of 6 consecutive batches with eggs weighing between 59 and 61 g. Heat production was determined continuously from E14.5 onward. In fresh eggs, yolk weight tended to be higher (Delta = 0.28 g; P = 0.08) in the AB crossbred than in the BB crossbred. At E14.5 and E18.5, yolk-free body mass (YFBM) and residual yolk (RY) weight did not differ between genetic crossbred and EST. Hatching time after the start of incubation was not affected by genetic crossbred, but was longer in the 36.7 degrees C (517 h) than in the 38.9 degrees C (505 h), with 37.8 degrees C in between (506 h). At 6 h after hatching, no differences between crossbreds were found for chicken quality parameters, such as chicken weight, chicken length, RY, YFBM, and organ weights, but heart weight was higher in the 36.7 degrees C EST than in the other 2 EST (Delta = 0.24 to 0.30% of YFBM, P = 0.005). Intestinal weight was higher at 36.7 degrees C EST than at 38.9 degrees C EST (Delta = 0.79% of YFBM; P = 0.02), with 37.8 degrees C EST in between. Heat production between E14.5 and E18.5 was higher in the AB crossbred than in the BB crossbred (Delta = 2.61%, P < 0.001) and regardless of crossbred higher at an EST of 38.9 degrees C than at other 2 EST (Delta = 3.59% on average; P < 0.001). Hatchling quality determined at pulling (E21.5) was not affected by EST, but AB chickens were lighter (Delta = 0.46 g; P = 0.03), had less red hocks (Delta = 0.03; P = 0.02), more red beaks (Delta = 0.10; P < 0.001), and a higher (worse) navel score (Delta = 0.11; P < 0.001) than BB chickens. It can be concluded that not only incubation temperature, but also the rooster line appears to play a role in layer crossbred embryo metabolism and hatchling quality.