Browsing by Author "Kucuk, M."

Now showing 1 - 10 of 10

Changes in Testicular Development, Ultrasonographic and Histological Appearance of the Testis in Buck Kids Immunized Against Lhrh Using Recombinant Lhrh Fusion Protein
(Wiley-blackwell Publishing, inc, 2009) Ulker, H.; Kucuk, M.; Yilmaz, A.; Yoruk, M.; Arslan, L.; deAvila, D. M.; Reeves, J. J.
This study was designed to evaluate the effectiveness of recombinant Ovalbumin-LHRL (OL) immunization on changes in testicular size, histological appearance and testosterone production in buck kids. Thirty native buck kids at 18 weeks of age were divided into three groups, control (n = 10), immunization (n = 10) and castration (n = 10) groups. Immunized animals received OL protein generated by recombinant DNA technology. Ultrasonographic and histological examinations of the testes were performed. Animals were slaughtered at 44 weeks of age. Semen and epididymides were evaluated for the presence of sperm cells. Immunized animals generated anti-LHRH antibodies. Testosterone production, testicular and accessory glands development and sperm production were suppressed in the immunized animals (p < 0.01). Semineferous tubule diameters decreased (p < 0.01), basal membrane of the tubule was thickened and hyalinized in immunized kids. Immunization affected ultrasonographic appearance of the testes drastically. While testes of control animals gained their normal ultrasonographic appearance as the age increased, immunized animals had uniform hypoechogenic testicular structure as observed at 18 weeks of age until slaughter. Simultaneous histological and ultrasonographic evaluations indicated that the changes in testicular histology could partly be monitored via ultrasonographic imaging; nevertheless, it is difficult to claim that ultrasonographic image reflects the exact changes in such instances. In conclusion, these results indicate that recombinant OL fusion protein is effective in immunocastration in buck kids and has a potential to be used as an alternative to physical castration. Further researches should be conducted to help assessing reproductive status of testes from ultrasound images.
Determination of Fatty Acid Compositions, Oil Contents and Some Quality Traits of Hazelnut Genetic Resources Grown in Eastern Anatolia of Turkey
(Academic Press inc Elsevier Science, 2006) Balta, M. F.; Yarilgac, T.; Askin, M. A.; Kucuk, M.; Balta, F.; Ozrenk, K.
Located in eastern Anatolia, Bitlis province presents microclimatic conditions for hazelnut cultivation. This microclimatic zone results from the mild effects of Lake Van and Suphan Mountain. With native hazelnut population of 2750 da, Hizan County is surrounded by high mountains, and is a special microclimatic zone where all plantations consisting of thousands of hazelnut plants are native. Bitlis can therefore be said to be rich in wild genetic resources of hazelnut. The aim of this study was to select promising genotypes within the native hazelnut population, describe the desirable nut characteristics, and provide some chemical traits with respect to nutritional values for future breeding efforts. In this study, some nut quality characteristics, protein, ash and oil contents, and fatty acid compositions of 20 Corylus avellana L. genotypes selected from native hazelnut population of Bitlis (eastern Anatolia, Turkey) were described. The hazelnut genotypes showed nut weight in a range from 1.85 to 3.63 g; kernel weight, 0.80-1.46 g; kernel percentage, 32.26-46.11 %; shell thickness, 1.20-2.04 mm; nut length, 16.1-23.4 mm; nut width, 15.9-21.0 mm; nut thickness, 12.9-18.5 mm; kernel length, 13.0-18.7 mm; kernel width, 10.3-15.4 mm; kernel thickness, 9.4-12.8 mm; nut shape index, 0.99-1.50; kernel shape index, 0.96-1.73; shrivelled kernel, 0-10%, and double kernels, 0-6%. With respect to nutritional analyses, the hazelnuts contained oil in the range from 57.5% to 74.1%; protein, 15.7-19.2%, ash, 0.79-3.21%; palmitic acid, 4.39-8.85%; stearic acid, 1.67-3.18%; oleic acid, 73.48-81.57%; linoleic acid, 10.46-14.95%: linolenic acid, 0.02-0.34%, and myristic acid, 0.01-0.16%. All genotypes had light-brown colored kernels, and kernel flavor was "medium satisfactory" and "satisfactory". The findings revealed that some genotypes are promising in nut and kernel characteristics as well as in nutritional value for future breeding efforts. (c) 2005 Elsevier Inc. All rights reserved.
The Determination of The Best Growth Model for Akkaraman and German Blackheaded Mutton X Akkaraman B1 Crosbreed Lambs
(Scientific Issues Natl Centre Agrarian Sciences, 2009) Kucuk, M.; Eyduran, E.
The present paper aimed to determine the most suitable growth model for Akkaraman and German Blackheaded Mutton x Akkaraman B-1 crosbreed lambs using various growth models (Monomolecular, Logistic, and Gompertz growth models). Coefficient of determination and Root Mean Square Error (RMSE) were used to the best growth model. The data were composed of 30 Akkaraman breed (Genotype I) and 25 German Blackheaded Mutton x Akkaraman B-1 crosbreed lambs (Genotype II). Body weights of lambs were recorded monthly from birth to 180(th) days of age. It was concluded that the most suitable growth model for two genotypes was found to be monomolecular growth model.
Determination of the Best Nonlinear Model for Describing Complete Lactation of Akkaraman and German Blackheaded Mutton X Akkaraman Crossbreed (F1) Sheep
(Scientific Issues Natl Centre Agrarian Sciences, 2010) Kucuk, M.; Eyduran, E.
The fat-tailed Akkaraman breed, traditionally raised in Turkey, is a breed with the best adaptation to poor feeding and harsh conditions. German Blackheaded Mutton breed originated from British downs breeds, one of breeds raised in Germany, has long mating season (about approximately two lambs a year) and a perfect adaptation to rainy country. The objective of present paper was to determine the most appropriate nonlinear model for describing complete lactation of Akkaraman and German Blackheaded Mutton x Akkaraman B-1 Crossbreed Sheep. The data were consisted of milk production records collected from 25 Akkaraman (Genotype I) and 23 German Blackheaded Mutton x Akkaraman B-1 Crossbreed Sheep (Genotype II) with 2 year of age. Daily milk yields of all ewes were recorded fortnightly from 15(th) days to 150(th) days of lactation. Quadratic, Cubic model, and Wood models were fitted to daily milk yield - time data in order to explain daily milk yield-time relationship of these ewes. These models were fitted to averages of daily milk yield of all ewes at each period for two genotypes. It was concluded that the best nonlinear model for describing complete lactation of Akkaraman breed and German Blackheaded Mutton x Akkaraman B-1 Crossbreed Sheep was found to be Cubic model.
Determination of the Ideal Growth Curve of Angora X Coloured Mohair Goat Cross and Coloured Mohair Goat Kids
(2009) Kucuk, M.; Eyduran, E.; Bolacali, M.; Ozdemir, T.
The aim of this study was to determine the best growth model explaining growth of body weights of Angora goat x coloured Mohair goat cross-breed F 1 and coloured Mohair goat kids using Gompertz, 3 parameter Logistic, Richards and 4 parameter Logistic growth models. Kids were divided into four groups, Angora goat x coloured Mohair goat cross-breed F1 male (genotype Im) and female (genotype If) kids, and oloured Mohair goat kids male (genotype llm) and female (genotype IIf) kids. In order to determine the best growth model, coefficient of determination (R2), Root of Mean Square Error (RMSE), and asymptotic correlations among growth parameters were used. Contrary to other growth models, absolute asymptotic correlation coefficients among parameters of Gompertz growth model for all groups were found higher than 0.95. As a result, it was concluded that Gompertz growth model was the best model for growth at early phase of four groups of goats studied.
The Effect of Immunization Against Lhrh on Carcass Characteristics in Coloured Mohair Goats
(indian veterinary Journal, 2008) Kucuk, M.; Bolacali, M.; Ulker, H.; DeAvila, D. M.; Reeves, J. J.
Immunizing farm animals against luteinizing releasing hormone (LHRH) is an alternative to castration (Thompson, 2000). It suppressed testicular development and reduced sexual activities in domestic species (Adams and Adams, 1992). It has been reported that immunizing male animals against LHRH had no negative effect on carcass quality (Kiyma, et al., 2000 and Huxol et al., 1998). A recombinant fusion protein, ovalbumin-LHRH-7 was developed (Zhang et al., 1999). The immunocastrate effect of this recombinant protein was demonstrated in farm animals (Ulker et al., 2003). The aim of the present study was to compare the carcass traits of goat kids intact, surgically castrated and actively immunized against LHRH using ovalbumin-LHRH-7 fusion protein.
Effect of Management System and Dietary Yeast Autolysate on the Performance, Slaughter and Carcass Characteristics of Partridges (Alectoris Chukar)
(South African Journal of Animal Sciences, 2018) Bolacali, M.; Kucuk, M.; Tufan, T.; Aslan, L.
This study was conducted to determine the effects of management system (a floor housing (FH) versus a free-range housing (FRH) system) and dietary yeast autolysate (Saccharomyces cerevisiae) (1% versus 2% dietary supplement) on the performance, slaughter and carcass characteristics of partridges (Alectoris chukar). A total of 480 (240 for each management system) one-day-old male partridge chicks were randomly allocated to a control group and the two dietary groups per production system, each containing 80 chicks. Each dietary group was then divided into five replicate groups of 16 chicks. The study lasted 112 days. In terms of growth performance, partridges reared under FRH management system had a lower average daily live weight gain (ADG), a significantly higher feed intake (FI), and feed conversion ratio (FCR) compared to the control group. However, partridges fed diets with yeast autolysate had a significantly higher ADG, lower FI, and an improved FCR compared to the control group overall. The gizzard, leg, and wing percentages of the partridges reared in the FRH system were found to be significantly higher than those of partridges reared in the FH system, while the breast and abdominal fat percentages were found to be lower. Dietary supplementation with yeast autolysate significantly increased the cold carcass yield and breast percentage when compared to the control group, while wing and abdominal fat percentages were decreased. In general, best performance was observed in the dietary supplementation group of 1% yeast autolysate in terms of growth and carcass parameters. When considering the fact that partridges are gamebirds, that housing poultry in cage production systems has been prohibited in recent years and that there are positive effects associated with using yeast autolysate as a prebiotic, it is recommended that a free-range production system should be used for partridge breeding, with the addition of 1% yeast autolysate to the diet of the birds.
The Effects of Immunization Against Lhrh Using Recombinant Lhrh Fusion Protein Ol on Testicular Development, Ultrasonographic and Histological Appearance of the Testis in Buck Kids
(Amer Soc Animal Science, 2006) Ulker, H.; Kucuk, M.; Yilmaz, A.; Yoruk, M.; Arslan, L.; deAvila, D. M.; Reeves, J. J.
Growth Performance and Mortality in Hybrid Converter Turkeys Reared at High Altitude Region
(Scientific Issues Natl Centre Agrarian Sciences, 2011) Yilmaz, O.; Denk, H.; Kucuk, M.
This study was to evaluate growth performance and mortality in Hybrid Converter turkeys reared under intensive conditions at high altitude region. The present study was carried out at an altitude about 1725 metres above sea level. 5040 (mixed gender) for determination of survival rate and 340 (170 per gender) Hybrid Converter poults for growth performance were utilized in the study. The experiment was terminated at 105 day of age in female and 120 day of age in male poults. Hybrid Converter poults exhibit fast-growing traits, as was observed with the body weights of 9.644 and 12.7 kg at 105 d of age for female and male birds, respectively. Body weight of male poults was 16.094 kg at 120 d of age. The weights of the female and male turkeys did differ significantly (P<0.001). The highest coefficients of variation (CV) for body weight in female poults (9.50% at 75 d of age) and male poults (10.96 % at 15 d of age) were observed. In general, CV of body weights at growth period ranged from 8.12 to 16.69 %. The average mortality for Hybrid Converter poults was 4.25% at 120 d of age. The highest mortality (2.46%) was observed at 10-13 wk of age, while the lowest mortality (0.51%) was observed at 0-4 wk of age. The results of the experiment that growth performance of Hybrid Converter poults reared under intensive conditions at high altitude were within commercial standards. The highest mortality was observed at 10-13 wk of age, in which growth rate was also the highest, while the lowest mortality was observed at 0-4 wk of age, in which growth rate was the lowest.
Investigation of Survival Rate, Growth Performance and Some Body Measurements of Saanen X Hair Goat F1 Crossbred and Pure Hair Goat Kids Raised in Semi-Intensive Conditions
(2013) Yilmaz, O.; Kucuk, M.; Bolacali, M.; Cak, B.
The goal of this study was to determine survival rate, growth performance and some body measurements of Saanen x Hair goat F1 crossbred and pure Hair goat kids raised in semi-intensive conditions. The study was conducted at Research Farm of Yuzuncu Yil University in Van province, Turkey. Data were collected using 72 Saanen x Hair goats F1 crossbred and 41 Hair goat kids born in February and April in 2011. The survival rates of Saanen x Hair goat F1 crossbred and Hair goat kids at 90 (weaning) and 180 days of age were 90.28 and 90.24 %; 84.72 and 90.24 %, respectively. Effects of genotype, gender and birth type on survival rates of kids at 90 and 180 days of age were not significant (P>0.05). Body weights at birth, weaning and 180 days of age of Saanen x Hair goat F1 crossbred and Hair goat kids were 3.13 and 3.15 kg; 12.22 and 11.90 kg; 22.52 and 21.82 kg, respectively. Effects of dam's age (P<0.05) and dam's live weight (P<0.01) on birth weight of kids were significant; effects of gender, birth type (P<0.05) and dam's live weight (P<0.01) on live weight of kids at 90 days of age (weaning) were significant. The effect of only dam's live weight (P<0.01) on live weight of kids at 180 days of age was significant. Wither heights, body lengths, chest circumferences, chest lengths and chest depths of Saanen x Hair goat F1crossbred and Hair goat kids at 180 days of age were 54.5 ve 52.3 cm; 56.1 ve 53.2; 64.3 ve 65.7 cm; 31.4 ve 30.4 cm; 25.7 ve 25.7 cm, respectively. The findings of the present study showed that survival rates and live weights in various growth periods of Saanen x Hair goat F1 crossbred and Hair goat kids raised in semi-intensive conditions were similar. Furthermore, wither heights, chest circumference, chest lengths and chest depths of Saanen x Hair goat F1 crossbred and Hair goat kids did not differ, however body length was significant in favour of Saanen x Hair goat F1 crossbred kids.