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Articles by Hamit Mirtagioglu
Total Records ( 2 ) for Hamit Mirtagioglu
  Galip Bakir , Siddik Keskin and Hamit Mirtagioglu
  Milk yield is important in breeding studies because it is one of the economically important traits. Therefore, determining the relationship between milk yield and some other traits could provide some important easiness in animal breeding studies. In this study, the aim was to evaluate the relationship between mature age milk yield and 9 independent variables (cow age, first mating age, lactation order, lactation period, dry period, first calving age, calving season, birth type and sex of calf) using CHAID analysis. Seven hundred and seventy Brown Swiss animals’ records (from 1987-1997) taken from Mus State Production Farm (in Turkey) were utilized. CHAID analysis results showed that lactation period was primary, sex of calf and cow age were secondary and first mating age and dry period were the tertiary variables affecting mature age milk yield.
  Kadir Karakus and Hamit Mirtagioglu
  The objective of this study is to analyze by generalized linear mixed modeling technique with binomial structure data for reproductive characteristics in Norduz local ewes in Turkey. The data were collected from Yuzuncu Yil University, Animal Science Breeding Farm in Turkey. A total of 83 ewes and their 94 lambs at born 2004 season were included in the analysis born over a period of one year. Five Norduz rams were analyzed for sperm characteristics before artificial insemination (AI). AI is applied according to sperm performance of rams. Reproductive characteristics were included birth weight (BW), birth type, sex and return or non-returning (RNR) performance for two successive estrus cycles of ewes and age of dam (2, 3, 4 and 5). As regards of the criteria for Goodness of Fits for investigated traits, the values of the fitting results indicated that using models are good fit for all traits. Effecting birth type and sex of lamb have been importance effects on the BW. On the other hand, effect of age of the dam, ram and returning have not been significantly on the BW. According to the results, lambs` ram produced medium (3 or 4 mass activity score) quality of the sperm have been higher BW than others. Male and single born lambs have been also highest BW. In the analysis a GENMOD procedure for an unequal design was used in order to account for the effect of some reproduction traits. In this study, GENMOD procedure accounts for the effect of these traits on the estimates of parameters, if all information upon which the culling decisions were made included in the data.
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