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.

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Relationship between weight, volume and specific gravity of goose eggs before incubation ABSTRACT In this study, the relationships between the weight, volume and specific gravity of eggs are revealed by calculating egg's volume and specific gravity depending on the weight of the egg, breadth and length, which are only three variables, with mathematical equations. Eggs to three goose genotypes, Grey China, Linda and Native geese from Aksaray region taken from six breeders were used. Eggs (n=481) were weighed and Length, Breadth measurements made with a precision of 0.01 mm. Average weights in genotypes from large to small in Linda, Native and Chinese geese were detected as; 165.9, 137.2 and 131.1 g, respectively, and the average egg volume was found as; 152.0, 126.0 and 120.3 cm 3 , respectively. Specific gravity from large to small in Linda, China and Native has occurred as; 1.092, 1.091 and 1.089 g/cm 3 . Egg volume was calculated with mathematical equations and results were close to real, and accordingly the calculated Specific gravity was also detected to be realistic. These results were obtained easily by only three variables, egg weight, and Length and Breadth values. This method can pave the way to obtain a lot of information about the egg with Specific gravity.

Backround: 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.

Bu çalışma, Konya Merinos'u kuzularının sütten kesim ağırlığı yönünden, damızlık değerlerini BLUP (Best Linear Unbiased Prediction) metodu ile hesaplamak amacıyla yapılmıştır. Çalışmada, 1997-2002 Dam age, sex, birth type and year were taken into account as fixed effects for weaning weight. Birth weight was included into the analyses as a covariate. Heritabilities included in analysis were estimated by using six different models of REML technique. Heritabilities estimated through six different models were 0.33, 0.12, 0.07, 0.22, 0.06 and 0.19. Based on the predicted breeding values by using BLUP method, the best ten lambs were recommended to the institute as breeding rams. As a result; BLUP, the most reliable method for predicting the breeding values, can be used at the farms recording with pedigree.