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    A study on the effect of altitude on shell thickness in goose eggs
    (Agricultural Research Communication Centre, 2021) Karabulut, Osman
    Egg shell plays role in the respiration, regulation of humidity, protection against diseases and integrity of egg. Therefore thickness of egg shell is an important feature. Many factors contribute to the formation of the shell thickness. The effect of altitude is still the subject of research. Methods: 103 eggs were randomly collected from locations at 915 m, 920 m, 931 m, 935 m, 939 m, 960 m, 968 m, 995 m, 1150 m and 1.350 m altitudes laid out between Tuz Lake and Hasan Mountain and the thickness of the shell at the Blunt end, Equatorial part and Sharp end of the eggs were measured. Conclusion: The average thickness of the shell at the blunt end, equatorial part and sharp end were 0.54 mm, 0.58 mm and 0.60 mm respectively. These differences were statistically significant. When considering the effect of altitude on these three points and general egg thickness, the average values for general thickness varied from 0.53 mm to 0.60 mm, this was 0.51 mm - 0.56 mm for blunt end, 0.53 mm to 0.61 mm for equatorial part and 0.54 mm to 0.62 mm for sharp end. The differences according to altitude noted among equatorial part and sharp end were statistically significant. The correlations between the altitude with Blunt end, Equatorial part, Sharp end and general were insignificant. The results indicated that these altitudes had no obvious effect on eggshell thickness and that the difference detected in thickness could be caused by other factors that are ought to be determined by further studies.
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    BVDV monitoring by pooling and real time RT-PCR as economical monitoring technique with low BVDV prevalence
    (İlker ÇAMKERTEN, 2022) Ün, Hikmet; Gökçe, Mustafa Murat; Ayaz, Oğuz; Şimşek, Suna; Karabulut, Osman
    The aim of this study was to determine whether the use of pooled blood samples and real-time RT-PCR are feasible for detecting BVDV in viremic or PI animals. For this purpose, blood samples obtained from 2701 cattle, brought from 62 different farms, were used to test for the presence of bovine viral diarrhoea virus (BVDV) at the Veterinary Virology Department of Aksaray University Faculty of Veterinary Medicine. The sampling was done from all geographical regions in Turkey. Blood samples were pooled in groups of eight, creating a total of 342 pools. Each pool was checked for BVDV with a real-time RT-PCR test. BVDV nucleic acid was detected in 18 (5.26%) of a total of 342 pools. BVDV was detected in 18 of 62 farms. The most important result obtained from this study is that BVDV monitoring by pooling and real time RT-PCR can be done very economically when the disease prevalence is low (<10%). A risk/benefit estimation can be done for breeders who want to start vaccination programs.
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    Estimation of the external quality characteristics of goose eggs of known breadth and length
    (Czech Academy of Agricultural Sciences, 2021) Karabulut, Osman
    In this study, we investigated whether the mathematical formulas, which generally reveal the external quality characteristics of living organisms, yield the correct results in goose eggs. For this purpose, three genotypes and 555 eggs were studied that were grouped into Native (n = 356), Chinese (n = 163) and Linda (n = 36), which were raised in Aksaray province. The averages in the Native, Chinese and Linda geese were 5.43, 5.38 and 5.7 cm, respectively, in breadth; were 8.12, 8.03 and 8.67 cm in length, respectively; the shape index was 66.9, 67.2 and 66.7 cm, respectively; the egg volume was 142.8, 138.8 and 172.5 cm3, respectively; the egg surface area was 136.9, 134.3 and 155.4 cm2, respectively; the egg weight was 159.1, 154.5 and 192.3 g, respectively; the specific gravity of the eggs was 1.11, 1.11 and 1.12 g/cm3, respectively; the shell thickness was 0.510, 0.504 and 0.555 mm, respectively; the shell weight was 14.79, 14.32 and 18.26 g, respectively; the shell volume was 70.06, 67.82 and 86.41 cm3, respectively; the shell specific gravity was 2.111 3, 2.111 0 and 2.113 5 g/cm3, respectively; and the shell ratio was 9.29, 9.26 and 9.49 g, respectively. The number of pores is calculated as 14 828, 14 502 and 17 152, respectively. Although the formulas used give compatible results, there is a need for formulas that calculate closer to the truth rather than formulas that calculate the egg weight and egg shell weight.