Person: PETEK, METİN
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Publication Effects of season, plumage colour, and transport distance on body weight loss, dead-on-arrival, and reject rate in commercial end-of-lay hens(MDPİ, 2021-06-01) Çavuşoğlu, Enver; Petek, Metin; Çavuşoğlu, Enver; ÇAVUŞOĞLU, ENVER; Petek, Metin; PETEK, METİN; Bursa Uludağ Üniversitesi/Veterinerlik Fakültesi.; 0000-0002-9018-3511; ABE-4828-2020Simple Summary The transport conditions of end-of-lay hens to slaughterhouses are essential for their welfare. In this study, the effect of season, plumage colour, and transport distance on body weight loss, dead-on-arrival rates, and reject rates was examined. Transport-related data of 31.6 million end-of-lay hens over a two-year period from one slaughter plant in Turkey were analysed. Hens transported in the winter and spring seasons had a greater body weight loss and reject rates. Brown-feathered hens had a higher death rate, while white-feathered hens had a higher body weight loss and reject rate. Hens transported longer distances for slaughter had increased body weight loss, death rates, and reject rates. These results indicate that more care should be taken when transporting end-of-lay hens in cold weather and over longer transport distances. We suggest the transport should be reduced to a certain distance, and improved conditions ought to be provided to mitigate losses. Transport conditions of end-of-lay hens are important for their welfare. This study investigated the effects of season, plumage colour, and transportation distance on the welfare of end-of-lay hens. Retrospective data from 31,667,274 end-of-lay hens transported to a poultry slaughterhouse in Turkey were analysed. The mean body weight loss, dead-on-arrival (DOA) rate, and reject rate were 3.723%, 1.397%, and 0.616%, respectively. The effects of season, plumage colour, and transport distance on the evaluated parameters were all statistically significant (p < 0.001). The highest body weight loss was found in winter, while the lowest body weight loss was found in autumn. The average DOA rate was highest in spring and lowest in autumn. The highest average reject rate was found in spring (0.630%). Body weight loss, DOA rates, and reject rates were also significantly different among white and brown hens (p < 0.001; p < 0.001; p = 0.016, respectively). The highest body weight loss and reject rates were found in white plumage hens, while the highest DOA rate was found in brown plumage hens. The body weight loss and DOA rate were positively correlated with transportation distance (p < 0.001). The results of this study indicate that more preventive measures should be taken during the transport of end-of-lay hens, especially in cold seasons such as winter, and over longer transport distances, in regard to the welfare of these animals. Additionally, the transport of these animals should be lessened to a certain distance.Publication Effects of genotype and housing system on some bone biomechanical characteristics in broiler chickens(Ankara Üniversitesi, 2019-04-21) Süzer, Bayram; Tüfekci, Kenan; Arıcan, İlker; Petek, Metin; Abdourhamane, Ibrahima Mahamane; Özbek, Melahat; Yıldız, Hüseyin; SÜZER, BAYRAM; TÜFEKCİ, KENAN; ARICAN, İLKER; PETEK, METİN; Abdourhamane, Ibrahima Mahamane; Özbek, Melahat; YILDIZ, HÜSEYİN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Anatomi Anabilim Dalı.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Zootekni Bölümü.; 0000-0002-2687-1221; 0000-0001-5358-1396; 0000-0001-6342-0094; 0000-0001-8789-3101; AAG-7076-2021; AAA-1366-2021; X-2000-2019; AAG-7518-2021; DNZ-6767-2022; EKQ-7243-2022; FNV-0028-2022The aim of this study was to determine the effects of two genotypes (slow-growing and fast-growing) and three housing systems (deep litter, plastic slat and free-range) on some bone biomechanical properties of broiler chickens and to evaluate the interaction between genotype and housing systems. Broilers from two genotypes were reared at three different housing conditions. Fifteen bones were randomly selected from each housing system in both slow-growing and fast-growing groups, and the experiment was performed on 90 bones in total. To determine bone characteristic and biomechanical traits of tibiotarsi, bones collected from right leg and then weighed, cortical area measurements and three-point bending tests were applied. Both live body weight and carcass weight were significantly affected by genotype and housing systems. There was no interaction between genotype and housing system in terms of bone weight, cortical area, breaking strength, bending strength, and deflection. Also, housing systems had no statistical effect on these parameters. Fast-growing broilers were significantly had heavier tibiotarsi, larger cortical area and higher breaking strength than slow-growing broilers, while bending strength was significantly lower in fast-growing broilers. Deflection was not affected by genotype or by housing system. In conclusion, bone geometry and biomechanical properties were not affected by housing systems but by genotype. Fast-growing broilers had better bone morphology and stronger bones than slow-growing genotype. Therefore, fast-growing genotype can provide positive effects on bone growth and mechanical properties in broilers.Publication Effects of housing locations on feather damages of laying hens in a free-range housing system(Hellenic Veterinary Medical Soc, 2020-10-01) Petek, Metin; PETEK, METİN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Zootekni Anabilim Dalı; DNZ-6767-2022This study was made to evaluate the effects of different locations of a free range housing system on feather damages of laying hens. The experimental house consisted of three different locations as closed indoor plastic slats, closed indoor litter and outdoor range area. The birds were able to move freely between the locations of the experimental house and they had continuous access to outdoor range during the day. The feather damages of the birds was evaluated with a distance scoring system at 64 weeks of age. Five area in each location of the experimental house were determined at first and then feather damages of five body parts of ten birds in each location were scored to measure plumage quality. Total feather score was defined as the sum of the scores of five body parts of the birds. Best plumage quality was measured in neck in all housing locations (P<0.01, P<0.05 and P<0.01) and total feather score of the birds was significantly greatest (worst) in slats (P<0.05).Publication Comparison of some biomechanical properties of tibiotarsus in four different feather color lines of 60-day old female quails(Facta-fundacio Arnco Ciencia Tecnologia Avicolas, 2020-01-01) Süzer, Bayram; SÜZER, BAYRAM; Petek, Metin; PETEK, METİN; Tüfekçi, Kenan; TÜFEKCİ, KENAN; Arıcan, İlker; ARICAN, İLKER; Abdourhamane, Ibrahima Mahamane; Yıldız, Hüsnü; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Anatomi Anabilim Dalı.; 0000-0002-2687-1221; 0000-0001-5358-1396; 0000-0001-6342-0094; 0000-0001-8789-3101; 0000-0003-2091-0303; GLV-3407-2022; AAG-7076-2021This study aimed to compare some morphological and mechanical measurements of four different color female quails to contribute to the formation of the morphological database.Quails are the smallest farmed avian species which are becoming more important for the poultry industry. They are also used as experimental animals and are valuable birds for researches. Genetic factors are important determinants of bone strength. Thus, skeletal disorders may be reduced by breeding selection in quails. Forty female quails with four different feather colors, including wild, white, yellow, and black, were compared at 60 days of age. Each quail group contained ten individuals. A three-point bending test was performed with a custom-made testing machine designed for low strength materials. No significant difference was found between the groups in terms of body weight. The tibiotarsus weight in wild and black (0,665 +/- 0,055g and 0,687 +/- 0,025g, respectively) was significantly lower than in the others but, the significant highest value was in white quails (0,758 +/- 0,063g) (p=0.001). Significantly shorter tibiotarsus was observed in the black quails (51,286 +/- 1,374mm), while the tibiotarsi of the white and yellow quails were the tallest (53,216 +/- 1,796mm and 53,083 +/- 1,092mm, respectively) (p=0.005). There were no significant differences among the groups in the biomechanical properties of tibiotarsus, except stiffness. Stiffness was the highest in the white quails (109,500 +/- 3,807 N/mm) and the lowest in the black quails (99,000 +/- 9,498 N/mm) (p=0.042). In conclusion, white quails have been observed to have relatively better bone biomechanical properties compared to the other color groups at 60 days of age.Publication Health-based welfare indicators and fear reaction of slower growing broiler compared to faster growing broiler housed in free range and conventional deep litter housing systems(Routledge Journals, Taylor & Francis Ltd, 2022-07-22) Abdourhamane, Ibrahima Mahamane; Petek, Metin; PETEK, METİN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi.; 0000-0001-8789-3101This study investigated the welfare of a slow-growing broiler with a commercially available fast-growing breed housed in a free-range and conventional deep litter housing system. There were four main groups (2 genotypes x 2 housing systems), and each main group consisted of 5 replicates. Ante-mortem and postmortem health-based welfare indicators with fear reactions and distribution of severity of them in 200 male chicks (100 slow growing, 100 fast growing) were investigated. All welfare parameters investigated were found to be significantly different between both broiler genotypes. No significant differences were detected for all broiler welfare parameters between the two housing systems. There were significant genotype x housing system interactions for breast dirtiness and feather cover of the birds (P ). In conclusion, it can be said that slow-growing broilers express more health-based indicators of positive welfare, and they might be more suitable for free-range broiler meat production. Planning further studies especially in commercial conditions that take into account economic efficiency as well as animal welfare and growth performance would be very beneficial.Publication Effects of range access on behavioral-based welfare indicators and foot health condition of slow- and fast-growing broiler(Aves, 2023-05-01) Abdourhamane, İbrahima Mahamane; Petek, Metin; Abdourhamane, İbrahima Mahamane; PETEK, METİN; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Zootekni Anabilim Dalı; 0000-0001-8789-3101; EKQ-7243-2022; DNZ-6767-2022This study was made to investigate outdoor range access on behavio-ral-based welfare parameters and post-mortem foot health conditions of slow-and fast-growing broilers in experimental conditions. There were four treatment groups (two genotypes as fast-and slow-growing birds x 2 indoor housing systems with or without range access) with five repli-cates. The behavior of 200 male chicks in the groups was observed at 8 weeks of age. The foot health condition was determined after slaughter. Fast-growing broilers spent more time with feeding, drinking, and dust bathing (p & LE; .001, p & LE; .001, and p & LE; .006). The locomotion and standing behavior were found to be greater in slow-growing broilers than fast-growing broilers (p & LE; .001 and p & LE; .001). The birds in conventional deep litter spent more time with drinking (p & LE; .001) and lying behavior (p & LE; .046). The post-mortem incidence of the foot pad and hock joint dermatitis was found to be greater in fast-growing broilers in both housing groups (p & LE; .05). The results have shown that the broilers with outdoor access exhibi-ted more natural behavior such as preening and slow-growing birds spent more time performing locomotion and standing. Slow-growing broilers had also less post-mortem foot pad and hock joint lesions compared to fast-growing broilers.Publication Proximate composition of leg meat of slow and fast-growing broiler in different housing systems(Istanbul Univ-cerrahpasa, 2022-01-01) Çetin, Ece; Çetin, İsmail; Özbek, Melahat; Petek, Metin; PETEK, METİN; Çavuşoğlu, Enver; ÇAVUŞOĞLU, ENVER; Bursa Uludağ Üniversitesi/Veteriner Fakültesi.; 0000-0002-9018-3511; ABE-4828-2020; FNV-0028-2022; DNZ-6767-2022The aim of this study was to evaluate the proximate composition of leg meat of slow- and fast-growing male broilers raised in different housing systems as conventional deep litter floor housing, indoor slatted floor housing, and indoor deep litter floor housing with range access (free-range). After slaughter at 56 days of age, 10 leg muscle samples of each 6 treatment group (2 x 3) were randomly selected and used to assess the meat quality properties. Compared to fast-growing chickens, slow-growing chicken meat had less protein content and higher fat content (p < .003, p < .05). There were significant differences in the water holding capacity of the meat between the slow- and fast-growing broilers (p < .05). The moisture content of the broiler meat produced from deep litter was found to be significantly greater than those of slatted floor housing and free-range (p < .041). The genotype x housing systems interaction for the fat content of leg meat of broiler was significant (p < .044). In conclusion, it can be said that genotype is more effective on proximate composition of broiler leg meat quality than the housing system.