Browsing by Author "Tekeli, A."

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Determination of the Effects of Z. Officinale and Propolis Extracts on Intestinal Microbiology and Histological Characteristics in Broilers
(Asian Network for Scientific Information, 2010) Tekeli, A.; Kutlu, H.R.; Celik, L.; Doran, F.
The purpose of this study is to explore the effects of Z.officinale and propolis extracts on intestine microbiology and histology in broilers as alternative growth promoters to antibiotics. One-day-old, Ross 308 male broiler chicks were used in the experiment. At the beginning of the experiment, seven treatment groups [negative control, positive control, Z. officinale, propolis and three different combinations of Z. officinale + propolis (0.5 + 0.5, 1 + 1 and 1.5 + 1.5)] were formed with similar mean weight, comprising 16 birds each. Each group was fed ad libitum for 42 days. Supplementation of Z. officinale and propolis extracts alone or in combination reduce Coliform bacteria (p<0.05) compared to negative control group. The highest numbers of total mesophilic aerobic bacteria was identified in the group with (1:1) combination of Z. officinale + Propolis (p<0.05). The high amount of such bacteria in this group can be attributed to the lack of Coliform bacteria and decreasing tendency in E. coli content. The desired stimulating effect on lactic acid bacteria was observed in all treatment groups compared to negative control group. Z. officinale and Propolis extracts and their combinations significantly improved intestinal villi length (p<0.05) compared to negative control group. These affirmative findings indicate likely improvement in performance parameters of animals in treatment groups. As a result; Z. officinale and Propolis extracts could have a great potential to promote broiler growth. © Asian Network for Scientific Information, 2010.
Dietary Inclusion of Grape Seed Oil in Functional Broiler Meat Production
(National Centre for Agrarian Sciences, 2014) Tekeli, A.; Rustu Kutlu, H.; Celik, L.
The purpose of this study is to explore the effects of grape seed oil on growth performance, some blood parameters and fatty acid composition in broiler meat. In order to formulate isocaloric ratios, the corresponding amounts of soy oil were excluded from the rations accordingly with the addition of 0, 5, 10 and 15 g grape seed oil per kg. Four treatment groups were formed each consisting of 20 birds with similar initial body weights. Feed and water were given ad libitum. At the end of the experiment, no statistically significant difference was identified among the groups with respect to body weight gain, feed consumption and blood parameters (P>0.05). Feed conversion rate was improved in the group supplemented with 15g/kg grape seed oil (P<0.05). Grape seed oil inclusion was determined to be quadratically significant for carcass yield (P<0.05). The use of grape seed oil in the ration significantly increased the levels of C17:1 heptadecanoic acid, C18:3 linoleic acid and C20:1 eicosenoic acid in the meat which is known to have health-promoting effects for humans (P<0.05). The results have shown that nutritional composition of diets could affect the fatty acid composition of broiler meat. Hence, the findings of the study support the potential use of grape seed oil in functional broiler meat production for human nutrition, particularly for those with cardiovascular diseases. © 2014 National Centre for Agrarian Sciences. All rights reserved.
Dietary Inclusion of Pumpkin Seed Oil for a Cholesterol Low and Oleic and Linolenic Acid Rich Egg Production in Layer Hens
(Ecole Nationale veterinaire Toulouse, 2011) Celik, L.; Kutlu, H. R.; Sahan, Z.; Kiraz, A. Bozkurt; Serbester, U.; Hesenov, A.; Tekeli, A.
The present study was conducted to evaluate whether dietary pumpkin seed oil would affect laying performance, egg quality, egg cholesterol content and the egg yolk fatty acid composition in Brown layer hens. For that, 72 Brown layers, 28- week-old, were divided into 4 equal groups (n = 18) of similar mean weight according to the added doses (0, 10, 20 or 40 g/kg) of pumpkin seed oil into the standard ration for 8 weeks. Laying performance was assessed by recording initial and final body weights, weight gains, food intake and food conversion ratio, egg weight, egg production daily, egg characteristics, as well as the plasma glucose, cholesterol and triglyceride concentrations and the egg cholesterol content and the fatty acid composition. The dietary pumpkin seed oil inclusion has not significantly affected the growth performances, the laying performance or the egg quality even if the overall number and weight of eggs and also the thickness and the weight of shell tended to slightly decrease. Whereas the plasma concentrations of triglycerides remained similar in the 4 groups, the cholesterolemia tended to decline according to the dose added to the ration and the glycaemia was significantly depressed in supplemented hens (P < 0.05). In parallel, the egg yolk cholesterol content was significantly lowered in birds receiving the pumpkin seed oil in a dose related manner and the yolk fatty acid composition was significantly altered, showing increase of behenic acid with the highest dose of pumpkin seed oil, and marked increase of unsaturated acids, particularly of oleic and linolenic acids whatever the dose. These results show that pumpkin seed oil can be added to the ration without significantly altering the growth and laying performance in order to produce eggs enriched in unsaturated acids and made thin in cholesterol.
Effects of Apricot Kernel Oil on Selected Performance and Blood Parameters and Meat Fatty Acid Composition of Broilers
(2012) Tekeli, A.
This study investigates the effects of apricot kernel oil on selected performance, blood and carcass parameters and meat fatty acid composition of broilers. A total of 80, 1 day old, Ross 308 male broiler chicks were used in the study and the animals were fed in individual cages. The group fed with soybean oil supplemented ration was the control group. Ensuring groups are fed with isocaloric rations, equivalent amounts of soybean oil were removed from the rations and substituted with corresponding 5,10 and 15 g kg-1 apricot kernel oils. The groups supplemented with these amounts of apricot kernel oil were the treatment groups. At the end of the 42 day long experiment, no statistically significant differences were observed among groups with respect to performance and carcass parameters (p>0.05). The lowest plasma acid phosphatase level was identified in the treatment group supplemented with 5 g kg-1 apricot kernel oil and the highest level was identified in the treatment group supplemented with 10 g kg-1 apricot kernel oil (p<0.05). Apricot kernel oil supplementation in broiler rations significantly increased the proportions of C15:0 pentadecanoic acid, C17:0 heptadecanoic (margaric) acid, C17:l heptadecanoic (margoleic) acid(p<0.05), C18:3 linolenic acid (p<0.001) and C20:1 eicosanoic acid (p<0.05). The experiment results indicated that apricot kernel oil supplementation in broiler rations does not generate any negative effects on animal performance and can be beneficial for human nutrition since it has effects on fatty acid composition of animals. © Medwell Journals, 2012.
Effects of Ascites (Pulmonary Hypertension Syndrome) on Blood Gas, Blood Oximetry Parameters and Heart Sections of Broilers Grown at High Altitude
(Pakistan Agricultural Scientists Forum, 2014) Tekeli, A.
The aim of this study was to determine the effects of ascites syndrome on some blood parameters and heart tissue of 300 broilers grown at high altitude (1727m) in Van Province. Ascites is a metabolic disorder in which excess amounts of ascitic fluids accumulate in the body cavity due to the cardiovascular problems resulted by inadequate supply of oxygen. Significant (P<0.05) differences were detected in blood oximetry parameters of SO2, ctHb, FO(2)Hb and Hct(c) (Hematocrit) between ascitic and healthy chicks. SO2 and FO(2)Hb concentrations were higher in healthy broiles while blood hemoglobin and hematocrit values were higher (P<0.05) in ascitic broilers. Similarly, right ventricular diameter significantly (P<0.05) increased in ascitic broilers. While right ventricular diameter of healthy broilers was 1.60 mm, right ventricular diameter of ascitic broilers increased to 4.92 mm. These findings indicate that blood oximetry parameters and heart sections can be used as indicators of ascites susceptibility in broilers grown at high altitudes. The results of the current study revealed that rearing of broilers at high altitude usually leads to ascites exhibited by decreased SO2 and FO(2)Hb oxygen saturation and increased ctHb and Hctc levels in blood and significantly enlarged right ventricular diameter.
Effects of Boron Supplementation Alone or in Combination With Different Vitamin D3 Levels on Laying Performance, Eggshell Quality, and Mineral Content and Fatty Acid Composition of Egg Yolk in Laying Hens
(Kielanowski inst Animal Physiology Nutrition, 2021) Sizmaz, O.; Koksal, B. H.; Tekeli, A.; Yildiz, G.
This study aimed to evaluate the effects of dietary boric acid with vitamin D-3 on laying performance, eggshell quality, and mineral content and fatty acid composition of egg yolk in hens. In the experiment, 160 late-phase laying hens were equally divided into four groups, 40 birds each (10 replicates of 4 hens each). The study included a control group and three treatment groups. In the control group, there was no additive, while the experimental groups contained: 1) vitamin D-3 3000 IU/kg + 120 ppm boric acid, HDB; 2) vitamin D-3 300 IU/kg + 120 ppm boric acid, LDB; and 3) 120 ppm boric acid, B; respectively. After 12 weeks of feeding, the egg mass was significantly reduced in HDB group in comparison to the control and feed efficiency was increased in HDB group in comparison to the control and B groups (P 0.05). No significant differences were observed in eggshell quality among groups (P 0.05). Egg yolk cholesterol content was decreased in LDB group in comparison to B group (P < 0.05). The concentration of C18:3 fatty acid was the highest (P < 0.05) in B group. In comparison to the control group, the C16:0 fatty acid concentration was lower in B group (P < 0.05). So, the combination of boric acid (120 ppm) and a high dose of vitamin D-3 (3000 IU/kg) is not recommended in laying hen feeding as it negatively influences laying performance parameters. On the other hand, although the supplementation of 120 ppm boric acid without additional vitamin D-3 increases egg yolk omega-3 fatty acid content, the cholesterol-reducing effect (but without fatty acid profile change) may be obtained only when boric acid is added simultaneously with a low level of vitamin D-3 (300 IU/kg), which can be used to produce functional food.
Effects of Multi-Enzyme Supplementation in Wheat Based Quail (Coturnix Coturnix Japonica) Rations on Egg Production, Egg Quality and Some Blood Parameters
(Animal Nutrition Assoc, 2014) Tekeli, A.; Bilgecli, K.; Celen, F.; Kurbal, O. F.; Bitigic, M.
This study investigates the effects of multi-enzyme (xylanase, beta-glucanase, cellulase, pectinase, and protease) supplementation of wheat based quail rations on body weight, feed consumption, egg production, egg quality, feed conversion ratio and some blood parameters. A total of 210 eight-week old quails were distributed into five groups and fed diet supplemented with the multi-enzyme Rovabio Excel at 0 (Control), 0.5 (E-0.5), 1.0 (E-1.0), 1.5 (E-1.5) and 2.0 (B-2.0) kg/ton for a period of 12 weeks. Egg production and egg number increased (P < 0.01) in E-1.0 and E-1.5 groups but decreased (P < 0.01) in E-2.0. The highest (P < 0.05) average egg weight was obtained in the E-1.5 group, fed with 1.5 kg enzyme/ton. Albumen index significantly increased (P < 0.05) in all treatment groups compared to control group. The highest (P < 0.05) yolk index was recorded in the E-0.5 group fed with 0.5 kg enzyme/ton. Egg shape index increased (P < 0.05) in the E-1.0 and E-2.0 groups while the Haugh unit increased significantly (P < 0.05) in the E-1.0 and E-1.5 groups. However, egg size decreased (P < 0.05) with E-1.0. As a result, 1 and 1.5 kg enzyme/ton amounts of Rovabio Excel enzyme supplementation in wheat based quail rations increased egg production, egg number, average egg weight, albumen index, yolk index, egg shape index and Haugh unit, Minolta a* value. This results of this study suggest that multi-enzyme additives can be used to improve the performance quail fed on wheat based rations.
Effects of the Dietary Flax or Grape Seed Oils on the Egg Yolk Fatty Acid Composition and on the N-3/N-6 Polyunsaturated Fatty Acid Ratio in Laying Hens
(Ecole Nationale veterinaire Toulouse, 2011) Celik, L.; Kutlu, H. R.; Sahan, Z.; Kiraz, A. B.; Serbester, U.; Hesenov, A.; Tekeli, A.
The present study was carried out to examine the effects of the dietary inclusion of flax or grape seed oils on the egg yolk fatty acid composition in two consecutive trials using Brown layer hens. In each experiment, after a 2 week acclimatising period, a total of 72 hens, 28 week old, were allotted in 4 equal groups (18 birds in each group) according to the seed oil doses (0%, 1%, 2% and 4%) included into the standard diet for 8 weeks. The fatty acid composition of the egg yolk was analysed at the beginning and at the end of each experimental period by gas chromatography. When the flax seed oil (rich in alpha-linolenic acid) was included to the diet, the proportions of the lignoceric (C24:0) and the linoleic (C18:2, n-6) acids gradually decreased (P < 0.05 and P < 0.01, respectively) whereas the a-linolenic acid (Cl 8:3, n-3) percentage and the n-3 / n-6 ratio significantly increased according to the included dose (P < 0.01) in the egg yolk. On the contrary, the yolk lignoceric acid content increased (P < 0.05) and the a-linolenic acid proportion as well as the n-3 / n-6 ratio significantly decreased in a dose-dependant manner (P < 0.05) when the grape seed oil (rich in linoleate) was used. These results show that the dietary inclusion of I% to 4% seed oils significantly affects the yolk acid composition and mainly the a-linoleate proportions and the n-3 / n-6 ratio and that the flax seed oil contrary to the grape seed oil induced a marked accumulation of the n-3 acid in yolk probably by promoting its direct deposition.
Evaluation of Fermentation Qualities and Digestibilities of Silages Made From Sorghum and Sunflower Alone and the Mixtures of Sorghum-Sunflower
(Asian Network for Scientific Information, 2006) Demirel, M.; Bolat, D.; Çelik, S.; Bakici, Y.; Tekeli, A.
The objectives of this study were to evaluate fermentation qualities and digestibilities of silages prepared om sorghum (S) and sunflower (SF) alone and the mixtures of sorghum and sunflower at differing rates 75% sorghum+25% sunflower (75S25SF), 50% sorghum+50% sunflower (50S50SF) and 2% 5sorghum+75 sunflower (25S75SF)] ensiled in 120 L plastic barrel for 90 days. pH values of sorghum and the mixtures were significantly lower than that of sunflower silage (p<0.05). Concentrations of lactic, acetic, propionic and butyric acids were significantly greater in sunflower silage compared with sorghum silage (p<0.05). Silage acid concentration tended to decrease with increasing levels of sorghum in the mixtures. While concentrations of DM, OM and NDF were lower, concentrations of CP and EE were higher in sunflower than sorghum silage (p<0.05). Sunflower had greater DM, CP and EE but lower ADF and NDF digestibilities compared with sorghum silage (p<0.05). As percentage of sunflower increased, DM, CP and EE digestibilities increased but ADF and NDF digestibilities decreased in the mixtures. It has been concluded that better quality silages could be obtained by mixing sorghum and sunflower at 50% ratio. © 2006 Asian Network for Scientific Information.