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Öğe Changes in testicular development, ultrasonographic and histological appearance of the testis in buck kids immunized against LHRH using recombinant LHRH fusion protein(Reproduction of Domestic Animals, 2009) Ülker, Hasan; Küçük, Mürsel; Yılmaz, Ayhan; Yörük, Macit; Aslan, Lokman; de de AVILA, David M; Reeves, Jerry JThis 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.Öğe Effect of management system and dietary yeast autolysate on the performance, slaughter and carcass characteristics of partridges (Alectoris chukar)(South African Journal of Animal Science, 2018) Bolacalı, Memiş; Küçük, Mürsel; Tufan, Tuncay; Aslan, LokmanThis 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.Öğe Effect of Non-Genetic Factors on The Reproductive Performance and Milk Yield Characteristics of Hair Goats(2019) Bolacalı, Memiş; Öztürk, Yahya; Yılmaz, Orhan; Küçük, Mürsel; Karslı, Mehmet AkifThe aim of this study was to determine the potential effect of non-genetic factors on certain productioncharacteristics of Hair goats raised under semi-intensive management and dry- sub humid conditions, and toinvestigate phenotypic correlations between these traits. A generalized linear model was used to investigate theeffect of non-genetic factors on gestation length (GL), number of services per conception (NSPC), lactationlength (LL), lactation milk yield (LMY) and daily milk yield (DMY), while the Chi-square method was used toevaluate other fertility parameters. The pregnancy rate, birth rate and single-birth rate in the Traditional Groupwere higher, while the infertility rate and NSPC were lower, than those in the Artificial Group (P<0.001).Furthermore, it was determined that LL, LMY and DMY increased (P<0.001), the NSPC decreased (P<0.001),and birth and twinning rates fluctuated (P<0.01) as age increased. The best fertility and milk yield characteristicswere in the ?5 year-old-goats and live weights of 45.0-49.9 kg. In addition, it was determined that kid yield wasincreased in the goats synchronized with intravaginal sponges impregnated with fluorogestone acetate and inthose bred via the traditional method.Öğe Investigation of some morphological traits of boer x hair f1 crossbred and pure hair goat kids raised in semi-intensive conditions(Universidad de la Frontera, 2017) Bolacali, Memis; Öztürk, Yahya; Yilmaz, Orhan; Küçük, Mürsel; Karslı, Mehmet AkifThe aim of the study was to determine various morphological characteristics from birth to the age of 150th day of Boer x Hair goat F1 crossbred (BH) kids and pure Hair goat (HG) kids raised in semi-intensive conditions and reveal factors such as the effects of genotype, dam age, dam’s live weight, year, birth type and sex on this parameter. This study was applied between the years 2011-2012 in Çatak in the Van region and between the years 2013-2014 at the Yuzuncu Yil University Research and Practice Farm. Various body measurements; wither height, back height, rump height, sacrum height, body length, chest length, chest depth, chest circumference, circumference of leg, cannon bone circumference, chest width, front-rump width, mid-rump width were determined 29.8, 28.4, 28.7, 26.2, 28.7, 17.0, 13.3, 30.4, 26.9, 5.2, 5.9, 6.0, and 8.7 cm at birth, respectively; 43.8, 43.8, 44.6, 40.6, 43.6, 22.2, 19.3, 51.7, 41.4, 6.6, 9.2, 9.3, and 11.3 cm at 60th day, respectively; 56.1, 53.4, 54.4, 47.5, 53.3, 27.3, 24.1, 61.4, 49.6, 7.3, 10.6, 11.1, and 13.2 cm at 150th day, respectively for BH kids; 27.3, 25.9, 29.3, 25.3, 27.1, 15.9, 12.3, 29.0, 21.3, 5.1, 5.0, 5.6, and 7.4 cm at birth, respectively; 40.4, 40.1, 42.9, 37.6, 40.5, 22.3, 18.4, 48.1, 36.4, 6.0, 7.9, 9.1, and 10.8 cm at 60th day, respectively; 50.3, 49.2, 51.0, 45.7, 50.4, 27.5, 22.9, 57.3, 43.4, 6.5, 9.5, 10.7, and 11.9 cm at 150th day, respectively for HG kids. When all of the data was considered, it was concluded that the BH kids are much better than the HG kids for both morphological and zoometric values. © 2017, Universidad de la Frontera. All rights reserved.
