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Öğe Carcass composition, meat quality and antibody levels in male and female Broiler chickens reared on low dietary protein(Ankara Univ Press, 2010) Atasoy, Fatih; Yakan, Akin; Ugurlu, Mustafa; Unal, Necmettin; Aksu, Taylan; Cengiz, SeydaThis research was conducted at the University of Ankara, Faculty of Veterinary Medicine Farm. The three hundred and sixty of one-day old chicks were seperated to male and female sex groups, and each sex group were also divided in to control, experiment I and 2 groups. Regimen feeding programme applied as crude protein 23.10 % from 1 to 11 days for all groups; 21.80, 20.20 and 18.40 % from 11 to 31 days for control, experiment I and 2 respectively. All groups were fed with % 18.40 crude protein from 32 to 47 days of age. Metabolic energy levels were 3117.80, 3083.69 and 3120.55 kcal / kg for all diet periods respectively. Animals were slaughtered at 40 and 47 days of age. Body weights at 47(th) day for males in experiment 1 and control groups were found similars (3075 ve 3086 g). The best feed conversion rate was found in males of experiment 1 groups (1.643 ve 1.763). Dressing, chilled dressing, breast, thigh and wing weights in males were found heavier (p<0.05, p<0.01) than females and similar in males of experiment I and control. The abdominal fat weight were high (p<0.001) in female and control groups. The average values estimated for the meat pH was similar in male and female as well as in experiments and control groups. Lightness, redness and yellowness (L*, a*, b*) values were high in females, water holding capacities were similar, cooking losses value was high in both male and experiments (p<0.01). While the crude protein values in experiment groups were high among groups, the intramuscular fat content was statistically similar. The percentage of crude ash and dry matter were Sigh (p<0.001) in control, the saturated fatty acid was similar, mono and polyunsaturated and omega-6 fatty acid were also similar or high in experiment groups. Antibody response to sheep red blood cell was found to be high (p<0.05) in control groups. In conclusion the body weight and feed conversion ratios were found high in male groups. The growth performance and carcass yield of male groups in experiment I were similar to control. There were no significant differences for meat quality and viability. Omega-6 in experiments over groups and antibody response in control were high. Hence sex separate rearing and diet programme in experiment I could be suggested in practical application.Öğe Damascus kids' slaughter, carcass and meat quality traits in different production systems using antioxidant supplementation(Elsevier, 2016) Yakan, Akin; Ates, Cafer Tayyar; Alasahan, Sema; Odabasioglu, Fuat; Unal, Necmettin; Ozturk, Oktay Hasan; Gungor, Omer FarukThis study intended to investigate slaughter, carcass and meat quality characteristics of Damascus male kids reared under different production systems and antioxidant effect (Vit E). The kids, housed in pen groups and grazing groups, were equally divided for production systems and later each group was again equally divided for determination of Vit E effect. Production systems and Vit E were found to have no significant effect on slaughter and carcass traits. Differences between production systems were found significant for meat pH(24), water holding capacity, cooking loss, tenderness, ether-extractable lipid and some color characteristics and concentrate feed supplemented with Vit E was effective on TBARS values. Each of the fatty acids except C18:2 n6 was affected by the production system but Vit E influence was superior on long-chain fatty acids. Grazing kids had a lower percentage of total SFA, n6, n6/n3, AI and TI ratio, while kids housed in pens had the lowest percentage of total UFA, NV and n3 ratio. On the other hand, kids that consumed supplemental Vit E had a higher percentage of total UFA, ratio of UFA/SFA, n3 and lower percentage of SFA, ratio of n6/n3, AI, TI compared to the kids fed by non-supplemental concentrate feed with Vit E. In accordance with the meat fatty acid composition, meat obtained from the kids that grazed and consumed supplemental Vit E was healthier than that of those housed in pen kids and non-supplemental Vit E consumed kids. (C) 2016 Elsevier B.V. All rights reserved.Öğe Effects of propylene glycol used at different doses in Akkaraman lambs rations on metabolism-related parameters and liver gene and protein expression during different feeding periods(Wiley, 2023) Yakan, Akin; Ozkan, Huseyin; Kaya, Ufuk; Keceli, Hasan Huseyin; Dalkiran, Sevda; Karaaslan, Irem; Unal, NecmettinThis study aimed to investigate the metabolic effects of propylene glycol (PG) over 60, 90, and 120 days in lambs. Seventy-two weaned male lambs were allocated into three groups: control (Con), PG1.5 (1.5 mL/kg live weight0.75), and PG3 (3 mL/kg live weight0.75). Blood samples were collected at the beginning and slaughter days. Biochemical parameters (glucose, triglycerides, ALT, AST, LDH, BUN, and insulin) and gene and protein levels of peroxisome proliferator activated receptor gamma (PPAR gamma), diacylglycerol o-acyltransferase 1 (DGAT1), carbohydrate responsive element binding protein (ChREBP), and sterol regulatory element binding transcription factor 1c (SREBP-1c) in the liver were determined. Glucose in PG1.5 was increased on Day 60, while significant differences were observed in biochemical parameters except for insulin on the 60, 90, and 120 days. Biochemical parameters such as ALT, AST, LDH, and BUN increased over time, while triglycerides decreased. DGAT1 gene and protein levels were lower, while SREBP-1c and PPAR gamma were higher in PG groups on Day 60. While SREBP-1c was lower in PG1.5, ChREBP was higher in PG3 on Day 90. PPAR gamma, DGAT1, and ChREBP were upregulated in PG3 on Day 120. Positive correlations were found between proteins. The long-term use of PG in lambs did not have detrimental effects on metabolism. The study provides valuable insights into the molecular mechanisms underlying the metabolic effects of PG in lambs, shedding light on its potential applications in lamb production.Öğe Investigation of Factors Influencing Thoroughbred Horses' Racing Career Length in Turkey(Elsevier Science Inc, 2021) Ozen, Dogukan; Kaya, Ufuk; Ozen, Hulya; Ambarcioglu, Pinar; Unal, Necmettin; Gurcan, Ismayil SafaThe aim of this research was to determine the average length of a Thoroughbred horse's racing career in Turkey using survival functions of Thoroughbred horses with various characteristics. In addition, the aim was to identify risk factors that could influence the duration of a Thoroughbred horse's racing career and develop a survival model that took these factors into account. A total of 11,721 Thoroughbred horses born in 2007 and later were included in the study population. The horses involved in the study were followed for a minimum of 1 year. Kaplan-Meier analysis was used to calculate the average length of racing career for each factor studied. Extended Cox regression analysis was used to determine the risk factors upon time of career ending and to create a survival model. Results showed that, the mean career length of Thoroughbred horses was 17.79 months (95% CI: 17.41-18.13). Also, starting age of the race, number of starts, type of track where the race started, racing on a single type racetrack and earning status were found risk factors that affect the length of the racing career. Earnings was the top relative contributor to the established model, and its sole adjusted effect showed that being in the lowest earning group increased the hazard of career ending 2.28 times (95% CI:1.98-2.61) compared to horses with highest earning group. In conclusion, clear differences upon the length of racing career was observed for each investigated factor. Future studies should be considerate of these differences when analyzing population data. (c) 2021 Elsevier Inc. All rights reserved.
